3Zr-Fae Engine Control System. Dtc P1603 Engine Stall History

After starting the engine, this DTC is stored when the engine stops without the ignition switch being operated.
Using the intelligent tester, the conditions present when the DTC was stored can be confirmed by referring to the freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
It is necessary to check if the vehicle has ran out of fuel before performing troubleshooting, as this DTC is also stored when the engine stalls due to running out of fuel.

DTC No.	DTC Detection Condition	Trouble Area
P1603	After monitoring for startability problems (P1604) finishes and 5 seconds or more elapse after starting the engine, with the engine running, the engine stops (the engine speed drops to 200 rpm or less) without the ignition switch being operated for 0.5 seconds or more (1 trip detection logic).	Air leak in intake system Purge VSV Brake booster hose not connected properly Mass air flow meter Engine coolant temperature sensor Wire harness or connector Air fuel ratio sensor Power supply circuit (purge VSV, fuel injector, ignition coil) Fuel pump Fuel pump control system Fuel line Throttle body assembly Camshaft timing oil control valve VVT system Air conditioning system Power steering system Electrical load signal system Continuously variable transaxle system* Park/neutral position switch* ECM

*: for CVT

P1605

This DTC is stored if the engine speed drops below the set speed.
Using the intelligent tester, the conditions present when the DTC was stored can be confirmed by referring to the freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
It is necessary to check if the vehicle ran out of fuel before performing troubleshooting, as this DTC is also stored when idling is unstable due to running out of fuel.

DTC No.	DTC Detection Condition	Trouble Area
P1605	After 5 seconds or more elapse after starting the engine, with the engine running, the engine speed drops to 400 rpm or less (1 trip detection logic).	Air leak in intake system Purge VSV Brake booster hose not connected properly Mass air flow meter Engine coolant temperature sensor Wire harness or connector Air fuel ratio sensor Power supply circuit (purge VSV, fuel injector, ignition coil) Fuel pump Fuel pump control system Fuel line Throttle body assembly Camshaft timing oil control valve VVT system Knock sensor Ignition coil Fuel injector Spark plug(s) Air conditioning system Power steering system Electrical load signal system Continuously variable transaxle system* Park/neutral position switch* ECM

*: for CVT

INSPECTION PROCEDURE

HINT:

In contrast to normal malfunction diagnosis for components, circuits and systems, DTCs P1603 and P1605 are used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as engine stall.
As these DTCs can be stored as a result of certain user actions, even if these DTCs are output, if the customer makes no mention of problems, clear these DTCs without performing any troubleshooting and return the vehicle to the customer.
If any other DTCs are output, perform troubleshooting for those DTCs first.

Use any information from the customer problem analysis about the condition of the vehicle at the time when the problem occurred (how the engine stopped, conditions when the engine was restarted, etc.) as a reference.

Symptom	Suspected Area
Engine vibration occurs and engine stops	Air-fuel ratio abnormal
Engine stops with no engine vibration	Ignition system, injection stoppage, high load from external parts
Engine can be started with accelerator pedal depressed	Insufficient air volume
Rough idling after engine started	Air-fuel ratio abnormal, abnormal combustion

Read freeze frame data using the intelligent tester. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
When confirming the freeze frame data, be sure to check all 5 sets of freeze frame data (RAV4_ACA30 RM000000PDS0ISX.html).
When DTC P1603 (Engine Stall History) is stored, DTC P1605 (Rough Idling) is also stored. When confirming freeze frame data, check DTC P1605. (The ECM stores DTC P1605 first. Therefore, the 5 sets of freeze frame data can be confirmed through DTC P1605, enabling the technician to obtain more information.)
When confirming freeze frame data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.
Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N (for CVT)) and compare these data with the freeze frame data.
Inspections take into account the fact that the malfunction may not have reoccurred and place emphasis on checking the vehicle conditions present at the time when the malfunction occurred.
When performing inspections, jiggle the relevant wire harnesses and connectors in an attempt to reproduce malfunctions that do not always occur.

Inspection flow:: Using freeze frame data, narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred.

P1603:

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.
Dtc
P1603 Engine Stall History

If the engine stalled when the intake air volume was low (during idling or deceleration), there may be a decrease in torque due to an incorrect air-fuel ratio, etc.
If the engine stalled when the intake air volume was high (during driving or acceleration), there may be a major malfunction such as continuous misfire due to ignition stoppage, fuel injection stoppage, etc. and the torque drops to zero.

If the engine speed decreased slowly, there may have been a decrease in torque due to an air-fuel ratio that was incorrect (by approximately 20 to 30%), etc.
If the engine speed decreased rapidly, there may have been a malfunction such as when the engine misfires almost continuously due to ignition stoppage, fuel injection stoppage, etc., or when the external load increases due to an external part malfunctioning.

If the air-fuel ratio is abnormal, there may have been an intake air leak, sensor malfunction, or fuel supply problem.
If the vehicle was normal, the air volume may have been insufficient, or the ignition timing may have been incorrect.

P1603 inspection flow: Narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred (freeze frame data).

Vehicle State	Engine Speed	Suspected Area		Primary Parts to Inspect	Procedure
Idling or decelerating	Slowly decreases and engine stalls	Air-fuel ratio abnormal	Air suction	Intake system connections Purge VSV system Brake booster	3 to 6
			Sensor malfunction (value from sensor too lean)	Mass air flow meter Engine coolant temperature sensor Thermostat Air fuel ratio sensor system	7 to 16
			Sensor malfunction (value from sensor too rich)		25 to 34
			Fuel supply problem	Fuel pump control system Purge VSV system Fuel line ECM	17 to 24
		Intake air volume insufficient	ISC flow rate	Throttle body assembly (ISC valve)	35 to 37
		Intake air volume insufficient	Excessive valve overlap	Camshaft timing oil control valve VVT system	38, 39
		Ignition timing incorrect	Does not operate as expected	Engine coolant temperature sensor Mass air flow meter	41, 42
	Rapidly decreases and engine stalls	Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (Fuel injector assembly, Ignition coil assembly)	43 to 46
	Rapidly decreases and engine stalls	External part malfunctioning	Increase in load	Air conditioning system Electrical load signal system Power steering system Park/neutral position switch Continuously variable transaxle system	47 to 49
Accelerating	-	Crankshaft position sensor, Camshaft position sensor malfunction	Power temporarily cut	Check DTCs	1
		Mass air flow meter	Foreign matter adhesion	Mass air flow meter	50, 51
		Fuel supply problem	Fuel leak, clog	Fuel pump control system Fuel line	54 to 56
		Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (Fuel injector, Ignition coil assembly)	52, 53

P1605:

If the engine speed decreased slowly, there may have been a decrease in torque due an air-fuel ratio that was incorrect (by approximately 20 to 30%), etc.
If the engine speed decreased rapidly, there may have been a malfunction such as when the engine misfires almost continuously due to ignition stoppage, fuel injection stoppage, etc., or when the external load increases due to an external part malfunctioning.

If the air-fuel ratio is abnormal, there may have been an intake air leak, sensor malfunction, or fuel supply problem.
If the vehicle was normal, the air volume may have been insufficient, or the ignition timing may have been incorrect.

P1605 inspection flow: Narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred (freeze frame data).

Engine Speed	Suspected Area		Primary Parts to Inspect	Procedure
Slowly decreases and engine stalls	Air-fuel ratio abnormal	Air suction	Intake system connections Purge VSV system Brake booster	3 to 6
		Sensor malfunction (value from sensor too lean)	Mass air flow meter Engine coolant temperature sensor Thermostat Air fuel ratio sensor system	7 to 16
		Sensor malfunction (value from sensor too rich)		25 to 34
		Fuel supply problem	Fuel pump control system Purge VSV system Fuel line ECM	17 to 24
	Intake air volume insufficient	ISC flow rate	Throttle body assembly (ISC valve)	35 to 37
	Ignition timing incorrect	Does not operate as expected	Knock sensor Engine coolant temperature sensor Mass air flow meter	40 to 42
Rapidly decreases and engine stalls	Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (Fuel injector assembly, Ignition coil assembly)	43 to 46
Rapidly decreases and engine stalls	External part malfunctioning	Increase in load	Air conditioning system Electrical load signal system Power steering system Park/neutral position switch Continuously variable transaxle system	47 to 49

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1603 OR P1605)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the tester on.

Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the DTCs.

Result:

Result
Proceed to
Only DTC P1603 and/or P1605 are output
A
DTCs other than P1603 and P1605 are output
B

GO TO DTC CHART (RAV4_ACA30 RM000000PDF0CDX.html)

A

2.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Problem Symptom	Freeze Frame Data Item for DTC P1605			Suspected Area	Proceed to
Problem Symptom	Closed Throttle Position SW	Engine Speed	Total of Short FT and Long FT	Suspected Area	Proceed to
When idling or decelerating, engine speed slowly decreases and engine stalls	All 5 sets of freeze frame data are ON	Decreases slowly*1	All 5 sets of freeze frame data are +15% or more*2	Air suction Sensor malfunction (value from sensor too lean) Fuel supply problem	A
			At least 1 of the 5 sets of freeze frame data is -15% or less*3	Sensor malfunction (value from sensor too rich)	B
			All 5 sets of freeze frame data are from -15% to +15%	Intake air volume insufficient Ignition timing incorrect	C
When idling or decelerating, engine speed rapidly decreases and engine stalls		Decreases rapidly*1	-	Injection stoppage, ignition stoppage Load from external parts	D
When accelerating or driving at constant speed, engine stalls*4	At least one is OFF	-	-	Sensor malfunction Injection stoppage, ignition stoppage Fuel supply problem	E

HINT:

*1: A rapid decrease in engine speed may have been caused by an electrical malfunction in the shared wiring of all or multiple cylinders, an increase in load from external parts, etc. The engine speed is considered to have decreased rapidly if either of the following conditions apply.
Otherwise, the engine speed is considered to have decreased slowly.

In the freeze frame data, the decrease in engine speed from #3 to #5 is 400 rpm or more.
In the freeze frame data, the engine speed at #5 is 120 rpm or less.

If the vehicle speed is 15 km/h (9.3 mph) or less and the difference between Engine Speed and SPD (NT) is 100 rpm or less, inspect the continuously variable transaxle. (Depending on the rate of vehicle deceleration, the engine speed may have decreased due to the CVT lock-up release being late.)
*2: When a DTC is stored, feedback compensation increases because the air-fuel ratio is determined to be lean.
*3: When a DTC is stored, feedback compensation decreases because the air-fuel ratio is determined to be rich.
*4: This item should be checked when DTC P1603 is output and is not necessary to check when only P1605 is output.

A

3.CHECK INTAKE SYSTEM

Check for air suction in the intake system [vacuum hose disconnection, cracks, gaskets, etc.] (RAV4_ACA30 RM00000341000BX.html).
HINT:
1. If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the vacuum inside the intake pipes increases and the air suction noise becomes louder.
2. If Short FT and Long FT are largely different from the normal values when idling (the intake air volume is small) and almost the same as the normal values when racing the engine (the intake air volume is high), air leakage may be present.
OK:
There is no air suction.

REPAIR OR REPLACE INTAKE SYSTEM

OK

4.CHECK PURGE VSV

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

Disconnect the purge hose (on the canister side) of the purge VSV.

Start the engine.

Idle the engine.

Disconnect the purge VSV connector.

Check if air flows through the purge VSV.
OK:
Air does not flow.

Connect the purge VSV connector.

Connect the purge hose of the purge VSV.
HINT:
When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs (RAV4_ACA30 RM000000PDK0M7X.html).

INSPECT PURGE VSV (RAV4_ACA30 RM000000R3500VX.html)

OK

5.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Stop Light Switch	At least 1 of the 5 sets of freeze frame data is ON	Air suction from brake booster	A
Stop Light Switch	All 5 sets of freeze frame data are OFF	-	B

Go to step 7

A

6.READ VALUE USING INTELLIGENT TESTER (SHORT FT #1)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.

Idle the engine.

Turn the tester on.

Enter the following menus: Powertrain / Engine and ECT / Data List / Short FT #1.
Standard:
Short FT #1 changes by +10% or less.
Result:
Result
Proceed to
OK
A
NG (for RHD)
B
NG (for LHD)
C
HINT:
1. Even if the results are normal, the brake booster may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the brake booster (refer to step 57).
1. When air suction is present, the feedback compensation increases because the air-fuel ratio becomes lean.
1. It is also possible to perform the airtightness inspection to check the brake booster (RAV4_ACA30 RM000001HJE00QX.htmlfor RHD, RAV4_ACA30 RM000001HJE00OX.html for LHD).

REPLACE BRAKE BOOSTER (RAV4_ACA30 RM000001HJD00SX.html)

REPLACE BRAKE BOOSTER (RAV4_ACA30 RM000001HJD00RX.html)

A

7.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Calculate Load	less than 90% of the current value of the vehicle*1	Mass air flow meter	A
AFS Voltage B1 S1	3.3 V or higher*2	Air fuel ratio sensor Wire harness or connector Actual air-fuel ratio abnormal	B
Both freeze frame data items listed above	Values are other than above	-	C

HINT:

Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N (for CVT)) and compare these data with the freeze frame data.
*1: If the mass air flow meter is malfunctioning and incorrectly measures the pressure to be less than the actual intake manifold pressure, the freeze frame data will show a low engine load value.
*2: If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is lean, the actual air-fuel ratio will become rich and the engine may stall.

Go to step 9

Go to step 12

A

8.CHECK MASS AIR FLOW METER

Remove the mass air flow meter.

Check for foreign matter in the air flow passage of the mass air flow meter.
Result:
Result
Proceed to
Visible foreign matter is present
A
Visible foreign matter is not present
B

Install the mass air flow meter.
HINT:
Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57).

Go to step 12

REPLACE MASS AIR FLOW METER (RAV4_ACA30 RM000002WQT00SX.html)

9.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE INJECTION VOLUME)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.

Idle the engine.

Turn the tester on.

Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.

Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.

Standard:

Tester Display	Specified Condition
Control the Injection Volume for A/F Sensor (25%)	Air fuel ratio sensor output voltage is below 3.1 V
Control the Injection Volume for A/F Sensor (-12.5%)	Air fuel ratio sensor output voltage is higher than 3.4 V

Result:

Result	Proceed to
NG	A
OK	B

HINT:

The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.
Even if the results are normal, the air fuel ratio sensor may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 57).

Go to step 12

A

10.CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR POWER SOURCE)

Disconnect the air fuel ratio sensor connector.

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
B113-2 (+B) - Body ground
Ignition switch ON
11 to 14 V
Text in Illustration
*a
Front view of wire harness connector
(to Air Fuel Ratio Sensor)
HINT:
1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
2. Make sure there is not an excessive amount of force applied to the wire harness.

Reconnect the air fuel ratio sensor connector.

CHECK AIR FUEL RATIO SENSOR POWER SOURCE CIRCUIT (RAV4_ACA30 RM000000WC10HTX.html)

OK

11.CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)

Disconnect the air fuel ratio sensor connector.

Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
B113-1 (HA1A) - B32-104 (HA1A)	Always	Below 1 Ω
B113-3 (A1A+) - B32-103 (A1A+)	Always	Below 1 Ω
B113-4 (A1A-) - B32-126 (A1A-)	Always	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
B113-1 (HA1A) or B32-104 (HA1A) - Body ground	Always	10 kΩ or higher
B113-3 (A1A+) or B32-103 (A1A+) - Body ground	Always	10 kΩ or higher
B113-4 (A1A-) or B32-126 (A1A-) - Body ground	Always	10 kΩ or higher

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

Reconnect the ECM connector.

Reconnect the air fuel ratio sensor connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE AIR FUEL RATIO SENSOR (RAV4_ACA30 RM000002WUR027X.html)

12.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605	Result	Proceed to
Initial Engine Coolant Temp, Ambient Temperature, Initial Intake Air Temp	Difference in temperature between each item is less than 10°C (18°F)*1	A
	Difference in temperature between each item is 10°C (18°F) or more*2	B

HINT:

*1: A long time had elapsed after stopping the engine.
*2: A long time had not elapsed after stopping the engine.

Go to step 15

A

13.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Initial Engine Coolant Temp, Coolant Temp, Engine Run Time	Range A	Engine coolant temperature sensor Thermostat	A
	Range B	Engine coolant temperature sensor	B
	Range C	-	C

HINT:

This step is not directly related to engine stall.

Go to step 16

Go to step 17

A

14.INSPECT THERMOSTAT

HINT:

For the thermostat inspection, refer to the following procedures (RAV4_ACA30 RM00000335X00HX.html).

Result:

Result	Proceed to
NG	A
OK	B

HINT:

This step is not directly related to engine stall.

Go to step 16

REPLACE THERMOSTAT (RAV4_ACA30 RM000000RTF031X.html)

15.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Coolant Temp	120°C (248°F) or higher	Engine coolant temperature sensor	A
Coolant Temp, Ambient Temperature	Engine coolant temperature is lower than outside temperature by 15°C (27°F) or more	Engine coolant temperature sensor	A
Both freeze frame data items listed above	Values are other than above	-	B

Go to step 17

A

16.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (RAV4_ACA30 RM000000VA900XX.html).

Result:

Result	Proceed to
NG	A
OK	B

HINT:

Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 57).

Go to step 17

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (RAV4_ACA30 RM000002WSG02VX.html)

17.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605
Result
Suspected Area
Proceed to
EVAP (Purge) VSV
At least 1 of the 5 sets of freeze frame data is not 0%
Purge VSV
A
All 5 sets of freeze frame data are 0%
-
B
HINT:
If the purge VSV is stuck closed, air-fuel ratio compensation by the purge VSV is incorrectly adjusted, and then the air-fuel ratio becomes lean and the engine may stall.

Go to step 22

A

18.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ACTIVATE THE VSV FOR EVAP CONTROL)

Disconnect the purge hose (on the canister side) of the purge VSV.

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Start the engine.

Turn the tester on.

Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.

When the purge VSV is operated using the tester, check whether the part of the purge VSV applies suction to your finger.
Standard:
Tester Operation
Specified Condition
ON
Purge VSV port applies suction to finger
OFF
Purge VSV port applies no suction to finger
Result:
Result
Proceed to
NG
A
OK
B

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Even if the results are normal, the purge VSV may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the purge VSV (refer to step 57).

Go to step 22

A

19.INSPECT PURGE VSV

Disconnect the purge VSV connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
1 - 2
20°C (68°F)
23 to 26 Ω
Text in Illustration
*a
Component without harness connected
(Purge VSV)

Reconnect the purge VSV connector.

REPLACE PURGE VSV (RAV4_ACA30 RM000002WUF00SX.html)

OK

20.CHECK HARNESS AND CONNECTOR (PURGE VSV POWER SOURCE)

Disconnect the purge VSV connector.

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
B112-2 - Body ground
Ignition switch ON
11 to 14 V
Text in Illustration
*a
Front view of wire harness connector
(to Purge VSV)
HINT:
1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
2. Make sure there is not an excessive amount of force applied to the wire harness.

Reconnect the purge VSV connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - EFI MAIN RELAY)

OK

21.CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

Disconnect the purge VSV connector.

Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Tester Connection
Condition
Specified Condition
B112-1 - B32-62 (PRG)
Always
Below 1 Ω
Standard Resistance (Check for Short):
Tester Connection
Condition
Specified Condition
B112-1 or B32-62 (PRG) - Body ground
Always
10 kΩ or higher
HINT:
1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
2. Make sure there is not an excessive amount of force applied to the wire harness.

Reconnect the ECM connector.

Reconnect the purge VSV connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)

22.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE FUEL PUMP / SPEED)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the tester on.

Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

Check whether the fuel pump operating sound occurs when performing the Active Test on the tester.
Standard:
Tester Operation
Specified Condition
ON
Operating sound heard
OFF
Operating sound not heard
Result:
Result
Proceed to
NG
A
OK
B
HINT:
1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
2. While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.
3. If the fuel pump operating noise is abnormal, proceed to step 23.

Go to step 24

A

23.INSPECT FUEL PUMP

Inspect fuel pump (RAV4_ACA30 RM0000017RH022X.html).

REPLACE FUEL PUMP (RAV4_ACA30 RM0000017RJ032X.html)

CHECK FUEL PUMP CONTROL SYSTEM (RAV4_ACA30 RM00000276807AX.html)

24.CHECK FUEL SYSTEM

Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter and inside the fuel tank), and for signs that the fuel pump was stuck.

Result:

Result
Proceed to
There is foreign matter or signs that fuel pump was stuck
A
There is no foreign matter and no signs that fuel pump was stuck
B
HINT:
If there is foreign matter such as iron particles on the fuel pump, fuel filter or fuel tank, remove the foreign matter.

Go to step 57

REPAIR OR REPLACE FUEL SYSTEM

25.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Calculate Load	110% or more of the current value of the vehicle*1	Mass air flow meter	A
AFS Voltage B1 S1	Below 3.3 V*2	Air fuel ratio sensor Harness and connector Actual air-fuel ratio abnormal	B
Both freeze frame data items listed above	Values are other than above	-	C

HINT:

Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N (for CVT)) and compare these data with the freeze frame data.
*1: If the mass air flow meter is malfunctioning and incorrectly measures the intake air volume to be more than the actual volume of air flowing through the intake manifold, the freeze frame data will show a high engine load value.
*2: As the air fuel ratio sensor output is low before the sensor warms up, the value at that time cannot be used for diagnosis. If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is rich, the actual air-fuel ratio will become lean and the engine may stall.

Go to step 27

Go to step 30

A

26.CHECK MASS AIR FLOW METER

Remove the mass air flow meter.

Check for foreign matter in the air flow passage of the mass air flow meter.
Result:
Result
Proceed to
Visible foreign matter is present
A
Visible foreign matter is not present
B

HINT:

Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 34, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57).

Go to step 30

REPLACE MASS AIR FLOW METER (RAV4_ACA30 RM000002WQT00SX.html)

27.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.

Idle the engine.

Turn the tester on.

Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.

Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.

Standard:

Tester Display	Specified Condition
Control the Injection Volume for A/F Sensor (25%)	Air fuel ratio sensor output voltage is below 3.1 V
Control the Injection Volume for A/F Sensor (-12.5%)	Air fuel ratio sensor output voltage is higher than 3.4 V

Result:

Result	Proceed to
NG	A
OK	B

HINT:

The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.
Even if the results are normal, the air fuel ratio sensor may have been malfunctioning. Continue this inspection procedure until step 34, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 57).

Go to step 30

A

28.CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR POWER SOURCE)

Disconnect the air fuel ratio sensor connector.

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
B113-2 (+B) - Body ground
Ignition switch ON
11 to 14 V
Text in Illustration
*a
Front view of wire harness connector
(to Air Fuel Ratio Sensor)
HINT:
1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
2. Make sure there is not an excessive amount of force applied to the wire harness.

Reconnect the air fuel ratio sensor connector.

CHECK AIR FUEL RATIO SENSOR POWER SOURCE CIRCUIT (RAV4_ACA30 RM000000WC10HTX.html)

OK

29.CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)

Disconnect the air fuel ratio sensor connector.

Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
B113-1 (HA1A) - B32-104 (HA1A)	Always	Below 1 Ω
B113-3 (A1A+) - B32-103 (A1A+)	Always	Below 1 Ω
B113-4 (A1A-) - B32-126 (A1A-)	Always	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
B113-1 (HA1A) or B32-104 (HA1A) - Body ground	Always	10 kΩ or higher
B113-3 (A1A+) or B32-103 (A1A+) - Body ground	Always	10 kΩ or higher
B113-4 (A1A-) or B32-126 (A1A-) - Body ground	Always	10 kΩ or higher

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

Reconnect the ECM connector.

Reconnect the air fuel ratio sensor connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE AIR FUEL RATIO SENSOR (RAV4_ACA30 RM000002WUR027X.html)

30.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605	Result	Proceed to
Initial Engine Coolant Temp, Ambient Temperature, Initial Intake Air Temp	Difference in temperature between each item is less than 10°C (18°F)*1	A
	Difference in temperature between each item is 10°C (18°F) or more*2	B

HINT:

*1: A long time had elapsed after stopping the engine.
*2: A long time had not elapsed after stopping the engine.

Go to step 33

A

31.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions when the DTC was stored which are recorded in the freeze frame data.

Result:

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Initial Engine Coolant Temp, Coolant Temp, Engine Run Time	Range A	Engine coolant temperature sensor Thermostat	A
	Range B	Engine coolant temperature	B
	Range C	-	C

HINT:

This step is not directly related to engine stall.

Go to step 34

Go to step 58

A

32.INSPECT THERMOSTAT

HINT:

For the thermostat inspection, refer to the following procedures (RAV4_ACA30 RM00000335X00HX.html).

Result:

Result	Proceed to
NG	A
OK	B

HINT:

This step is not directly related to engine stall.

Go to step 34

REPLACE THERMOSTAT (RAV4_ACA30 RM000000RTF031X.html)

33.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Coolant Temp	120°C (248°F) or higher	Engine coolant temperature sensor	A
Coolant Temp, Ambient Temperature	Engine coolant temperature is lower than outside temperature by 15°C (27°F) or more	Engine coolant temperature sensor	A
Both freeze frame data items listed above	Values are other than above	-	B

Go to step 58

A

34.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (RAV4_ACA30 RM000000VA900XX.html).

Result:

Result	Proceed to
NG	A
OK	B

HINT:

Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. If there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 57).

Go to step 57

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (RAV4_ACA30 RM000002WSG02VX.html)

35.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Total of ISC Learning Value and ISC Feedback Value	Less than 80% of the current value of the vehicle*1	Throttle body assembly	A
	120% or more of the current value of the vehicle*2	Throttle body assembly	B
	From 80 to 120% of the current value of the vehicle	-	C

HINT:

Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N (for CVT)) and compare these data with the freeze frame data.
*1: If the throttle body assembly has a temporary problem in which it cannot fully close, the intake air volume and engine speed increase. As a result, the ISC compensation amount becomes less than the standard. At this time, if the throttle body assembly returns to normal and fully closes, the intake air volume will be insufficient and the engine may stall.
*2: If carbon accumulates on the throttle body assembly and the intake air volume decreases, the ISC compensation amount is increased to maintain the idling speed. If this situation continues, the ISC compensation amount reaches the upper limit, the idling speed cannot be maintained causing idling to become unstable, and the engine may stall.

Go to step 37

Go to step 38

A

36.CHECK THROTTLE BODY ASSEMBLY

Check for foreign matter and signs that the throttle body assembly was stuck, and also check that the valve and shaft move smoothly during operation.
Result:
Result
Proceed to
NG
A
OK
B
HINT:
Even if the results are normal, the throttle body assembly may have been malfunctioning. Continue this inspection procedure until step 42, and if there are no problems with other parts, replace the throttle body assembly (refer to step 57).

Go to step 38

REPLACE THROTTLE BODY ASSEMBLY (RAV4_ACA30 RM000002WZZ03WX.html)

37.CHECK THROTTLE BODY ASSEMBLY

Check if carbon is in the air flow passage of the throttle body assembly.
Result:
Result
Proceed to
Carbon in passage
A
No carbon in passage
B
HINT:
Even if the results are normal, the throttle body assembly may have been malfunctioning. Continue this inspection procedure until step 42, and if there are no problems with other parts, replace the throttle body assembly (refer to step 57).

Go to step 38

REPLACE THROTTLE BODY ASSEMBLY (RAV4_ACA30 RM000002WZZ03WX.html)

38.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT SYSTEM)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the tester on.

Warm up the engine.

Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1).
HINT:
When performing the Active Test, make sure the A/C is on and the shift lever is in P or N (for CVT) or neutral (for M/ T).

Check the engine speed while operating the Oil Control Valve (OCV) using the tester.
OK:
Tester Operation
Specified Condition
OFF
Normal engine speed
ON
Soon after OCV switched from OFF to ON, engine idles roughly or stalls
HINT:
1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
2. When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
3. If the camshaft timing oil control valve is stuck on, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.

REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (RAV4_ACA30 RM000002WRE00SX.html)

OK

39.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT EXHAUST LINEAR)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the tester on.

Start the engine and warm it up.

Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank 1).

Check the engine speed while operating the camshaft timing oil control valve using the tester.
OK:
Tester Operation
Specified Condition
0%
Normal engine speed
100%
Engine idles roughly or stalls
HINT:
1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
2. When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
3. If the camshaft timing oil control valve is stuck on, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.

REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (RAV4_ACA30 RM000002WRE00SX.html)

OK

40.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605		Suspected Area	Proceed to
IGN Advance	Knock Correct Learn Value
Differs from the current value of the vehicle by 10 deg or more	Less than 3°CA	Engine coolant temperature sensor Mass air flow meter Knock sensor	A
	3°CA or more	-	B
Differs from the current value of the vehicle by less than 10 deg	-	-

HINT:

Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N (for CVT)) and compare these data with the freeze frame data.
Even if the results are normal, the knock control sensors may have been malfunctioning. If there are no problems with other parts, replace the knock control sensors (refer to step 57).

Go to step 57

A

41.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature inspection, refer to the following procedures (RAV4_ACA30 RM000000VA900XX.html).

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (RAV4_ACA30 RM000002WSG02VX.html)

OK

42.INSPECT MASS AIR FLOW METER

Inspect the mass air flow meter (RAV4_ACA30 RM000000VA5015X.html).
HINT:
If the intake air temperature sent to the ECM is higher than the standard due to the mass air flow meter (intake air temperature sensor) malfunctioning, the ignition timing may become delayed.

REPLACE MASS AIR FLOW METER (RAV4_ACA30 RM000002WQT00SX.html)

REPLACE KNOCK SENSOR (RAV4_ACA30 RM000002WSR00TX.html)

43.CHECK HARNESS AND CONNECTOR (FUEL INJECTOR POWER SOURCE)

Disconnect the fuel injector connector.

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
B16-1 - Body ground	Ignition switch ON	11 to 14 V
B15-1 - Body ground	Ignition switch ON	11 to 14 V
B14-1 - Body ground	Ignition switch ON	11 to 14 V
B13-1 - Body ground	Ignition switch ON	11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to Fuel Injector)

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.
A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)

Reconnect the fuel injector connector.

CHECK FUEL INJECTOR POWER SOURCE CIRCUIT (RAV4_ACA30 RM000000ZRM03ZX.html)

OK

44.CHECK HARNESS AND CONNECTOR (IGNITION COIL POWER SOURCE)

Disconnect the ignition coil connector.

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
B12-1 (+B) - B12-4 (GND)	Ignition switch ON	11 to 14 V
B11-1 (+B) - B11-4 (GND)	Ignition switch ON	11 to 14 V
B10-1 (+B) - B10-4 (GND)	Ignition switch ON	11 to 14 V
B9-1 (+B) - B9-4 (GND)	Ignition switch ON	11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to Ignition Coil)

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.
A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)

Reconnect the ignition coil connector.

CHECK IGNITION COIL POWER SOURCE CIRCUIT (RAV4_ACA30 RM000000XH40I9X.html)

OK

45.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result
Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Idle Spark Advn Ctrl (#1 to #4)	At least one cylinder shows a value of 4°CA or more	Fuel injector system Ignition coil system	A
Idle Spark Advn Ctrl (#1 to #4)	All cylinders show a value of less than 4°CA	-	B

Go to step 47

A

46.READ FREEZE FRAME DATA

Change the location of the ignition coil for the cylinder whose Idle Spark Advn Ctrl (#1 to #4) was 4°CA or more in step 45.

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the tester on.

Enter the following menus: Powertrain / Engine and ECT / Data List / Idle Spark Advn Ctrl (#1 to #4).
Result
Result
Proceed to
Same as result in step 45
A
Different from result in step 45
B
HINT:
Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

REPLACE IGNITION COIL (RAV4_ACA30 RM000002YO400WX.html)

A

47.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605			Suspected Area	Proceed to
A/C Signal	Air Conditioner FB Val	Power Steering Signal
A/C Signal display does not change from OFF*	-	Does not change from OFF	-	A
		Changes from OFF to ON	Power steering system
A/C Signal display changes from OFF to ON*	Value is 0 L/s	Changes from OFF to ON
		Does not change from OFF	-
	Value is shown	-	A/C system	B

*: Check not only the on / off state of the air conditioner but also the change in air conditioner load.

HINT:

Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N (for CVT)) and compare these data with the freeze frame data.
The normal value for the ISC learned value is engine displacement (liters) x 0.9.
Even if the results are normal, the Power steering system may have been malfunctioning. Continue this inspection procedure until step 49, and if there are no problems with other parts, inspect the Power steering system (refer to step 57).

CHECK AIR CONDITIONING SYSTEM

A

48.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605				Suspected Area	Proceed to (for CVT)	Proceed to (for M/T)
Electrical Load Signal 1	Electric Load Feedback Val	Difference between Engine Speed and Turbine Speed (SPD(NT))	Vehicle Speed
Electrical Load Signal display changes from OFF to ON, or value displayed for Electric Load Feedback Val increases	Value displayed for Electric Load Val changes	-	-	Electrical load signal circuit (w/ Entry and Start System)	A	A
				Electrical load signal circuit (w/o Entry and Start System)	B	B
	Value displayed for Electric Load Val does not change	At least 1 of the 5 sets of freeze frame data is less than 100 rpm	Less than 15 km/h (9.3 mph)	CVT system (for CVT) - (for M/T)	C	D
			15 km/h (9.3 mph) or more	-	D
		All 5 sets of freeze frame data are 100 rpm or more	-	-	D
Electrical Load Signal display does not change from OFF, or value displayed for Electric Load Feedback Val does not increase	-	At least 1 of the 5 sets of freeze frame data is less than 100 rpm	Less than 15 km/h (9.3 mph)	CVT system (for CVT) - (for M/T)	C	D
			15 km/h (9.3 mph) or more	-	D
		All 5 sets of freeze frame data are 100 rpm or more	-	-	D

*: If the Electrical Load Signal display changes from OFF to ON or the "Electric Load Feedback Val" increases, it probably is a malfunction due to a change in electrical load. Check the generator and the continuity and connections between the generator and ECM.

HINT:

The normal value for the ISC learned value is engine displacement (liters) x 0.9.
Even if the results are normal, the electrical load signal system and/or the CVT system may have been malfunctioning. Continue this inspection procedure until step 49, and if there are no problems with other parts, inspect the electrical load system and/or the CVT system (refer to step 57).

CHECK GENERATOR CIRCUIT (RAV4_ACA30 RM0000017VF01CX.html)

CHECK CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM

Go to step 49

CHECK GENERATOR CIRCUIT (RAV4_ACA30 RM0000017VF01BX.html)

49.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605		Suspected Area	Proceed to
Shift SW Status (P Range) or Shift SW Status (N Range)	Neutral Position SW Signal	Suspected Area	Proceed to
Shift SW Status (P Range) and Shift SW Status (N Range) are both OFF in at least one data set	In D or R, Neutral Position SW Signal is ON	Park/neutral position switch	A
	In D or R, Neutral Position SW Signal is OFF	CVT system	B
All 5 sets of freeze frame data are ON	-	-	C

HINT:

Even if the results are normal, the park/neutral position switch and/or CVT system may have been malfunctioning. If there are no problems with other parts, inspect the park/neutral position switch and/or CVT system (refer to step 57).

CHECK CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM

Go to step 57

CHECK PARK/NEUTRAL POSITION SWITCH

50.READ FREEZE FRAME DATA

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Using the tester, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (RAV4_ACA30 RM000000PDS0ISX.html).

Result:

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Throttle Sensor Position, Calculate Load	Calculate Load decreases while Throttle Sensor Position increases	Mass air flow meter	A
Throttle Sensor Position, Calculate Load	Calculate Load does not decrease while Throttle Sensor Position increases	-	B

Go to step 52

A

51.CHECK MASS AIR FLOW METER

Remove the mass air flow meter.

Check for foreign matter in the air flow passage of the mass air flow meter.
Result:
Result
Proceed to
Visible foreign matter is present
A
Visible foreign matter is not present
B

Install the mass air flow meter.
HINT:
Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 56, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57).

Go to step 52

REPLACE MASS AIR FLOW METER (RAV4_ACA30 RM000002WQT00SX.html)

52.CHECK HARNESS AND CONNECTOR (FUEL INJECTOR POWER SOURCE)

Disconnect the fuel injector connector.

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
B16-1 - Body ground	Ignition switch ON	11 to 14 V
B15-1 - Body ground	Ignition switch ON	11 to 14 V
B14-1 - Body ground	Ignition switch ON	11 to 14 V
B13-1 - Body ground	Ignition switch ON	11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to Fuel Injector)

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.
A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)

Reconnect the fuel injector connector.

CHECK FUEL INJECTOR POWER SOURCE CIRCUIT (RAV4_ACA30 RM000000ZRM03ZX.html)

OK

53.CHECK HARNESS AND CONNECTOR (IGNITION COIL POWER SOURCE)

Disconnect the ignition coil connector.

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
B12-1 (+B) - B12-4 (GND)	Ignition switch ON	11 to 14 V
B11-1 (+B) - B11-4 (GND)	Ignition switch ON	11 to 14 V
B10-1 (+B) - B10-4 (GND)	Ignition switch ON	11 to 14 V
B9-1 (+B) - B9-4 (GND)	Ignition switch ON	11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to Ignition Coil)

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.
A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)

Reconnect the ignition coil connector.

CHECK IGNITION COIL POWER SOURCE CIRCUIT (RAV4_ACA30 RM000000XH40I9X.html)

OK

54.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE FUEL PUMP / SPEED)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the tester on.

Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

Check whether the fuel pump operating sound occurs when performing the Active Test on the tester.
Specified Condition:
Tester Operation
Specified Condition
ON
Operating sound heard
OFF
Operating sound not heard
Result:
Result
Proceed to
NG
A
OK
B
HINT:
1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
2. While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.
3. If the fuel pump operating noise is abnormal, proceed to step 55.

Go to step 56

A

55.INSPECT FUEL PUMP

Inspect fuel pump (RAV4_ACA30 RM0000017RH022X.html).

REPLACE FUEL PUMP (RAV4_ACA30 RM0000017RJ032X.html)

CHECK FUEL PUMP CONTROL SYSTEM (RAV4_ACA30 RM00000276807AX.html)

56.CHECK FUEL SYSTEM

Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, the fuel tank), and for signs that the fuel pump was stuck.

Result:

Result
Proceed to
There is foreign matter or signs that fuel pump was stuck
A
There is no foreign matter and no signs that fuel pump was stuck
B

Go to step 57

REPAIR OR REPLACE FUEL SYSTEM

57.REPLACE MALFUNCTIONING PARTS

If the malfunction could not be identified in steps 3 to 24, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

Performed Step	Inspection or Part to Replace
Step 6	Brake booster replacement
Step 8	Mass air flow meter replacement
Step 9	Air fuel ratio sensor replacement
Step 16	Engine coolant temperature sensor replacement
Step 18	Purge VSV replacement
Step 24	Fuel pump replacement

If the malfunction could not be identified in steps 25 to 34, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

Performed Step
Inspection or Part to Replace
Step 26
Mass air flow meter replacement
Step 27
Air fuel ratio sensor replacement
Step 34
Engine coolant temperature sensor replacement

If the malfunction could not be identified in steps 35 to 42, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

Performed Step
Inspection or Part to Replace
Step 36, 37
Throttle body assembly replacement
Step 40
Knock sensor replacement

If the malfunction could not be identified in steps 43 to 49, inspect and repair the part which is suspected to be malfunctioning according to the step where an inspection was performed.

Performed Step	Inspection or Part to Replace
Step 47	A/C system inspection and repair Power steering system
Step 48	Continuously variable transaxle system inspection and repair Electrical load system inspection and repair
Step 49	Continuously variable transaxle system inspection and repair Park/neutral position switch inspection and repair

If the malfunction could not be identified in steps 50 to 56, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

Performed Step
Inspection or Part to Replace
Step 51
Mass air flow meter replacement
HINT:
Referring to the chart, inspect and repair or replace the part from the step where an inspection was performed.

NEXT

58.CLEAR DTC

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the tester on.

Clear the DTCs (RAV4_ACA30 RM000000PDK0M7X.html).

NEXT

59.PERFORM CONFIRMATION DRIVING PATTERN

Check if engine stall symptoms are present.
HINT:
If any engine stall symptoms are present, recheck for DTCs and freeze frame data and perform an inspection.

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

END

Result	Proceed to
Only DTC P1603 and/or P1605 are output	A
DTCs other than P1603 and P1605 are output	B

Result	Proceed to
Visible foreign matter is present	A
Visible foreign matter is not present	B

Tester Operation	Specified Condition
ON	Purge VSV port applies suction to finger
OFF	Purge VSV port applies no suction to finger

Tester Operation	Specified Condition
ON	Operating sound heard
OFF	Operating sound not heard

Result	Proceed to
There is foreign matter or signs that fuel pump was stuck	A
There is no foreign matter and no signs that fuel pump was stuck	B

Tester Operation	Specified Condition
OFF	Normal engine speed
ON	Soon after OCV switched from OFF to ON, engine idles roughly or stalls

Result	Proceed to
Same as result in step 45	A
Different from result in step 45	B

Performed Step	Inspection or Part to Replace
Step 26	Mass air flow meter replacement
Step 27	Air fuel ratio sensor replacement
Step 34	Engine coolant temperature sensor replacement

Performed Step	Inspection or Part to Replace
Step 36, 37	Throttle body assembly replacement
Step 40	Knock sensor replacement

Performed Step	Inspection or Part to Replace
Step 51	Mass air flow meter replacement