1Ur-Fe Engine Control. Dtc P1603 Engine Stall History

After starting the engine, this DTC is stored when the engine stops without the engine switch being operated.
Using the GTS, 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 engine switch being operated for 0.5 seconds or more (1 trip detection logic).	Air leak in intake system Purge VSV Mass air flow meter assembly Engine coolant temperature sensor Wire harness or connector Air fuel ratio sensor Power supply circuit (purge VSV, fuel injector assembly, ignition coil assembly) Fuel pump Fuel pump control system Fuel line Throttle body assembly Camshaft timing oil control valve assembly Air conditioning system Power steering system Electrical load signal system A/T system Park/neutral position switch assembly ECM

P1605

This DTC is stored if the engine speed drops below the set speed.
Using the GTS, 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 Mass air flow meter assembly Engine coolant temperature sensor Wire harness or connector Air fuel ratio sensor Power supply circuit (purge VSV, fuel injector assembly, ignition coil assembly) Fuel pump Fuel pump control system Fuel line Throttle body assembly Camshaft timing oil control valve assembly Knock sensor Ignition coil assembly Fuel injector assembly Spark plug(s) Air conditioning system Power steering system Electrical load signal system A/T system Park/neutral position switch assembly ECM

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 GTS. 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 (Click here).
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, 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) 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:

Land Cruiser. Urj200, 202 Grj200 Vdj200.1Ur-Fe Engine Control.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, the ignition timing may have been incorrect or the EGR valve may have been stuck open.

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	Ignition system abnormal	Igniter abnormal	Power supply circuit Ignition coil assemblies Spark plug	34, 48
		Air-fuel ratio abnormal	Air suction	Intake system connections Purge VSV system Brake booster	5, 6
			Sensor malfunction (value from sensor too lean)	Mass air flow meter Engine coolant temperature sensor Air fuel ratio sensor system Water inlet with thermostat sub-assembly	7 to 19
			Sensor malfunction (value from sensor too rich)		35 to 47
			Fuel supply problem	Fuel pump control circuit Purge VSV system Fuel line ECM	20 to 33
		Intake air volume insufficient	Problem with air passage	Intake system connections Mass air flow meter Brake booster PCV valve and hose Purge VSV system	49 to 51
		Intake air volume insufficient	Excessive valve overlap	Camshaft timing oil control valve	52 to 55
		Ignition timing incorrect	Does not operate as expected	Knock sensor Engine coolant temperature sensor Mass air flow meter	56 to 60
	Rapidly decreases and engine stalls*	Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (fuel injector assembly, ignition coil assembly)	61, 62
	Rapidly decreases and engine stalls*	External part malfunctioning	Increase in load	Air conditioning system Electrical load signal system Power steering system A/T system Park/neutral position switch assembly	63 to 65
Accelerating	-	Crankshaft position sensor or VVT sensor malfunction	Power temporarily cut	Check DTCs	1
		Mass air flow meter	Foreign matter adhesion	Mass air flow meter	66 to 69
		Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (fuel injector assembly, ignition coil assembly)	70, 71
		Fuel supply problem	Fuel leak, clog	Fuel pump control circuit Fuel line	72 to 76

*: If the engine stalls immediately after the injection method is switched from port injection to direct injection, the injector driver may be malfunctioning.

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	Ignition system abnormal	Igniter abnormal	Power supply circuit Ignition coil assemblies Spark plug	34, 48
	Air-fuel ratio abnormal	Air suction	Intake system connections Purge VSV system Brake booster	5, 6
		Sensor malfunction (value from sensor too lean)	Mass air flow meter Engine coolant temperature sensor Air fuel ratio sensor system Water inlet with thermostat sub-assembly	7 to 19
		Sensor malfunction (value from sensor too rich)		35 to 47
		Fuel supply problem	Fuel pump control circuit Purge VSV system Fuel line ECM	20 to 33
	Intake air volume insufficient	Problem with air passage	Intake system connections Mass air flow meter Brake booster PCV valve and hose Purge VSV system	49 to 51
	Intake air volume insufficient	Excessive valve overlap	Camshaft timing oil control valve	52 to 55
	Ignition timing incorrect	Does not operate as expected	Knock sensor Engine coolant temperature sensor Mass air flow meter	56 to 60
Rapidly decreases and engine stalls*	Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (fuel injector assembly, ignition coil assembly)	61, 62
Rapidly decreases and engine stalls*	External part malfunctioning	Increase in load	Air conditioning system Electrical load signal system Power steering system A/T system Park/neutral position switch assembly	63 to 65

*: If the engine stalls immediately after the injection method is switched from port injection to direct injection, the injector driver may be malfunctioning.

NOTICE:

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

1.CHECK FOR ANY OTHER DTCS OUTPUT

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Read the DTCs (Click here).

Result
Result
Proceed to
Only DTC P1603 and P1605 are output
A
DTCs other than P1603 and P1605 are output
B
HINT:
If any DTCs other than P1603 or P1605 are output, troubleshoot those DTCs first.

GO TO DTC CHART (Click here)

A

2.CHECK FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).
OK:
Immobiliser Fuel Cut is OFF.
Result
Result
Proceed to
Abnormal
A
Normal
B

Go to step 4

A

3.CHECK ENGINE IMMOBILISER SYSTEM

Connect the GTS to the DLC3.

Start the engine.

Idle the engine.

Enter the following menus: Powertrain / Engine and ECT / Data List / Immobiliser Communication and Immobiliser Fuel Cut.

Check the Data List indication.
Result
Data List Item
Result
Immobiliser Communication
ON
Immobiliser Fuel Cut
OFF

Result
Data List Item	Result
Immobiliser Communication	ON
Immobiliser Fuel Cut	OFF

CHECK ENGINE IMMOBILISER SYSTEM

OK

4.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

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 be caused by an electrical fault in the shared wiring of all or a number of cylinders, an increase in load from external parts, etc. The engine speed is considered to have decreased rapidly if either of the following conditions applies.
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 30 km/h or less and the difference between Engine Speed and SPD (NT) is 100 rpm or less, inspect the automatic transmission. Depending on the rate of vehicle deceleration, the engine speed may have decreased due to the A/T 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

Go to step 6

5.CHECK INTAKE SYSTEM

Check for air leakage in the intake system [due to vacuum hose disconnection, cracks, damaged gaskets, etc.] (Click here).
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 leakage.

REPAIR OR REPLACE INTAKE SYSTEM

OK

6.CHECK PURGE VSV

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

Start the engine.

Idle the engine.

Disconnect the connector of the purge VSV.

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

Connect the connector of the purge VSV.

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 (Click here).

REPLACE PURGE VSV (Click here)

OK

7.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

Result
Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Calculate Load	Below 90% of the current value of the vehicle*1	Mass air flow meter assembly	A
AFS Voltage B1S1 AFS Voltage B2S1	3.3 V or higher*2	Air fuel ratio sensor Wire harness or connector Actual air-fuel ratio abnormal	B

HINT:

*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 11

A

8.CHECK MASS AIR FLOW METER ASSEMBLY

Remove the mass air flow meter assembly.

Check for foreign matter in the airflow passage of the mass air flow meter.

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

Install the mass air flow meter assembly.
HINT:
Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 22, and if there are no problems with other parts, replace the mass air flow meter assembly (refer to step 55).

REPLACE MASS AIR FLOW METER ASSEMBLY (Click here)

A

9.CHECK HARNESS AND CONNECTOR (ECM - MASS AIR FLOW METER)

Check the harnesses and connectors, referring to DTC P0102 inspection procedure (Click here).
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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

10.PERFORM DRIVE TEST

Connect the GTS to the DLC3.

Start the engine and warm it up until the engine coolant temperature stabilizes.
HINT:
The A/C switch and all accessory switches should be off.

Idle the engine.

Using the GTS, read the value of Calculate Load in the Data List.

Standard
Data List
Specified Condition
Calculate Load
90 to 110% of the current value of the vehicle

Result
Result
Proceed to
Abnormal
A
Normal
B

Go to step 14

REPLACE MASS AIR FLOW METER ASSEMBLY (Click here)

11.PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION VOLUME)

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

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

Idle the engine.

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

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

Standard:

GTS Display	Specified Condition
Control the Injection Volume (+12.5%)	Air fuel ratio sensor output voltage is below 3.1 V
Control the Injection Volume (-12.5%)	Air fuel ratio sensor output voltage is higher than 3.4 V

Result
Result	Proceed to
Abnormal	A
Normal	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.

Go to step 14

A

12.CHECK TERMINAL VOLTAGE (AIR FUEL RATIO SENSOR POWER SOURCE)

Check the harnesses and connectors, referring to DTC P0031 inspection procedure (Click here).
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.

REPLACE AIR FUEL RATIO SENSOR (Click here)

OK

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

Check the harnesses and connectors, referring to DTC P2237 inspection procedure (Click here).
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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

14.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

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*1	A
	Difference in temperature between each item is 10°C 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 17

A

15.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

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 18

Go to step 20

A

16.INSPECT THERMOSTAT

HINT:

For the thermostat inspection, refer to the following procedures (Click here).

Result
Result	Proceed to
Abnormal	A
Normal	B

Go to step 18

REPLACE THERMOSTAT (Click here)

17.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

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

Go to step 20

A

18.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (Click here).

Result
Result	Proceed to
Abnormal	A
Normal	B

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (Click here)

A

19.CHECK HARNESS AND CONNECTOR (ECM - ENGINE COOLANT TEMPERATURE)

Disconnect the ECM connector.

Disconnect the engine coolant temperature sensor connector.

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

Standard Resistance:

for RHD
Tester Connection
Condition
Specified Condition
C18-2 - C46-76 (THW)
Always
Below 1 Ω
C18-1 - C46-98 (E2)
Always
Below 1 Ω
C18-2 or C46-76 (THW) - Body ground
Always
10 kΩ or higher

for RHD
Tester Connection
Condition
Specified Condition
C18-2 - C45-76 (THW)
Always
Below 1 Ω
C18-1 - C45-98 (E2)
Always
Below 1 Ω
C18-2 or C45-76 (THW) - 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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

20.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

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 29

A

21.PERFORM ACTIVE TEST USING GTS (ACTIVATE THE VSV FOR EVAP CONTROL)

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

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Start the engine.

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

Operate the purge VSV and check the airflow.
Standard:
Activate the VSV for Evap Control
Specified Condition
ON
Air flows
OFF
Air does not flow
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.

Go to step 29

A

22.INSPECT PURGE VSV

Inspect the purge VSV (Click here).

REPLACE PURGE VSV (Click here)

OK

23.CHECK TERMINAL VOLTAGE (PURGE VSV POWER SOURCE)

Disconnect the purge VSV connector.

Turn the engine switch on (IG).

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
C55-1 - Body ground
Engine switch on (IG)
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.

REPAIR VACUUM SWITCHING VALVE ASSEMBLY NO.1

OK

24.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:

for RHD
Tester Connection
Condition
Specified Condition
C55-2 - C46-63 (PRG)
Always
Below 1 Ω
C55-2 or C46-63 (PRG) - Body ground
Always
10 kΩ or higher

foe LHD
Tester Connection
Condition
Specified Condition
C55-2 - C45-63 (PRG)
Always
Below 1 Ω
C55-2 or C45-63 (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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

25.CLEAR DTC

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Turn the GTS on.

Clear the DTCs (Click here).

NEXT

26.READ VALUE USING GTS (EVAP (Purge) VSV)

Connect the GTS to the DLC3.

Start the engine and warm it up until the engine coolant temperature stabilizes.
HINT:
The A/C switch and all accessory switches should be off.

Idle the engine for 15 minutes or more.

Using the GTS, read the value of EVAP (Purge) VSV in the Data List.

Standard
Data List
Specified Condition
EVAP (Purge) VSV
Value other than 0% is displayed

Result
Result
Proceed to
Abnormal
A
Normal
B

CHECK FOR INTERMITTENT PROBLEMS (Click here)

A

27.PERFORM ACTIVE TEST USING GTS

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

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Start the engine.

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

Operate the purge VSV and check the airflow.
Standard:
Activate the VSV for Evap Control
Specified Condition
ON
Air flows
OFF
Air does not flow
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.

CHECK FOR INTERMITTENT PROBLEMS (Click here)

A

28.CHECK CONNECTOR CONNECTION CONDITION (ECM)

Check the ECM connector connection condition.
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.

CONNECTOR CORRECTLY

REPLACE ECM (Click here)

29.PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP DUTY)

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Turn the GTS on.

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

When performing the Active Test, check for an operating sound from the fuel pump.
Standard
Control the Fuel Pump Duty
Specified Condition
25 or 80%
Operating sound heard
OFF
Operating sound not heard
Result
Result
Proceed to
Abnormal
A
Normal
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 30.

Go to step 31

A

30.INSPECT FUEL PUMP

Inspect the fuel pump (Click here).

REPLACE FUEL PUMP (Click here)

CHECK FUEL PUMP CONTROL CIRCUIT (Click here)

31.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check the fuel leaks.
3. Check the fuel pressure.
4. Check the fuel pressure (for high pressure).
  HINT:
  For the fuel system On-vehicle Inspection, refer to the following procedures (Click here).
Result
Result
Proceed to
Abnormal
A
Normal
B

CHECK FOR INTERMITTENT PROBLEMS (Click here)

A

32.CHECK FUEL SYSTEM

Check for foreign matter, such as iron particles, around the 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.

REPAIR OR REPLACE FUEL SYSTEM

A

33.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check the fuel leaks.
3. Check the fuel pressure.
4. Check the fuel pressure (for high pressure).
  HINT:
  For the fuel system On-vehicle Inspection, refer to the following procedures (Click here).
Result
Result
Proceed to
Abnormal
A
Normal
B

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

END

34.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (Click here).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

35.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

Result
Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Calculate Load	Below 90% of the current value of the vehicle*1	Mass air flow meter assembly	A
AFS Voltage B1S1 AFS Voltage B2S1	3.3 V or higher*2	Air fuel ratio sensor Wire harness or connector Actual air-fuel ratio abnormal	B

HINT:

*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 39

Go to step 42

A

36.CHECK MASS AIR FLOW METER ASSEMBLY

Remove the mass air flow meter assembly.

Check for foreign matter in the airflow passage of the mass air flow meter.

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

REPLACE MASS AIR FLOW METER ASSEMBLY (Click here)

A

37.CHECK HARNESS AND CONNECTOR (ECM - MASS AIR FLOW METER)

Check the harnesses and connectors, referring to DTC P0102 inspection procedure (Click here).
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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

38.PERFORM DRIVE TEST

Connect the GTS to the DLC3.

Start the engine and warm it up until the engine coolant temperature stabilizes.
HINT:
The A/C switch and all accessory switches should be off.

Idle the engine.

Using the GTS, read the value of Calculate Load in the Data List.

Standard
Data List
Specified Condition
Calculate Load
90 to 110% of the current value of the vehicle

REPLACE MASS AIR FLOW METER ASSEMBLY (Click here)

OK

39.PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION VOLUME)

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

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

Idle the engine.

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

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

Standard:

GTS Display	Specified Condition
Control the Injection Volume (+12.5%)	Air fuel ratio sensor output voltage is below 3.1 V
Control the Injection Volume (-12.5%)	Air fuel ratio sensor output voltage is higher than 3.4 V

Result
Result	Proceed to
Abnormal	A
Normal	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.

Go to step 42

A

40.CHECK TERMINAL VOLTAGE (AIR FUEL RATIO SENSOR POWER SOURCE)

Check the harnesses and connectors, referring to DTC P0031 inspection procedure (Click here).
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.

REPLACE AIR FUEL RATIO SENSOR (Click here)

OK

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

Check the harnesses and connectors, referring to DTC P2237 inspection procedure (Click here).
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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

42.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

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*1	A
	Difference in temperature between each item is 10°C 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 45

A

43.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

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 46

Go to step 74

A

44.INSPECT THERMOSTAT

HINT:

For the thermostat inspection, refer to the following procedures (Click here).

Result
Result	Proceed to
Abnormal	A
Normal	B

Go to step 46

REPLACE THERMOSTAT (Click here)

45.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

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

Go to step 77

A

46.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (Click here).

Result
Result	Proceed to
Normal	A
Abnormal	B

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (Click here)

A

47.CHECK HARNESS AND CONNECTOR (ECM - ENGINE COOLANT TEMPERATURE)

Disconnect the ECM connector.

Disconnect the engine coolant temperature sensor connector.

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

Standard Resistance:

for RHD
Tester Connection
Condition
Specified Condition
C18-2 - C46-76 (THW)
Always
Below 1 Ω
C18-1 - C46-98 (E2)
Always
Below 1 Ω
C18-2 or C46-76 (THW) - Body ground
Always
10 kΩ or higher

for RHD
Tester Connection
Condition
Specified Condition
C18-2 - C45-76 (THW)
Always
Below 1 Ω
C18-1 - C45-98 (E2)
Always
Below 1 Ω
C18-2 or C45-76 (THW) - 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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK FOR INTERMITTENT PROBLEMS (Click here)

48.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (Click here).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

49.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

Result
Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Total of ISC Learning Value and ISC Feedback Value	Below 80% of the current value of the vehicle	Intake air volume insufficient	A
Total of ISC Learning Value and ISC Feedback Value	80% or more of the current value of the vehicle	Intake air volume insufficient	B

Go to step 52

A

50.CHECK INTAKE SYSTEM

Check for air leakage in the intake system [vacuum hose disconnection, cracks, damaged gaskets, etc.] (Click here).
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 leakage.

REPAIR OR REPLACE INTAKE SYSTEM

OK

51.CHECK INTAKE SYSTEM

Check the intake system.
1. Inspect the mass air flow meter.
2. Check the PCV hose.
3. Inspect the PCV valve.
4. Inspect the purge VSV.
  Result
  Result
  Proceed to
  Abnormal
  A
  Normal
  B

Go to step 56

A

52.PERFORM ACTIVE TEST USING GTS (CONTROL THE VVT LINEAR)

Connect the GTS to the DLC3.

Turn the GTS on.

Warm up the engine.

Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank1) or Control the VVT Linear (Bank2).
HINT:
When performing the Active Test, make sure the A/C is on and the shift lever is in N or P.

Check the engine speed while operating the camshaft timing oil control valve using the GTS.
OK:
GTS 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 (Click here)

OK

53.CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY - ECM)

Check the harnesses and connectors, referring to DTC P0010 inspection procedure (Click here).
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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

54.PERFORM ACTIVE TEST USING GTS (CONTROL THE VVT EXHAUST LINEAR)

Connect the GTS to the DLC3.

Turn the GTS on.

Warm up the engine.

Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank1) or Control the VVT Exhaust Linear (Bank2).
HINT:
When performing the Active Test, make sure the A/C is on and the shift lever is in N or P.

Check the engine speed while operating the camshaft timing oil control valve using the GTS.

OK:

GTS 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.

CHECK TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE)

OK

55.CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE)

Check the harnesses and connectors, referring to DTC P0013 inspection procedure (Click here).
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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

56.READ FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

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 10deg(CA) or more	Less than 3deg(CA)	Engine coolant temperature sensor Mass air flow meter assembly Knock sensor	A
	3deg(CA) or more	-	B
Differs from the current value of the vehicle by less than 10deg(CA)	-	-

CHECK FOR INTERMITTENT PROBLEMS (Click here)

A

57.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Inspect the engine coolant temperature sensor (Click here).

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (Click here)

OK

58.CHECK HARNESS AND CONNECTOR (ECM - ENGINE COOLANT TEMPERATURE)

Disconnect the ECM connector.

Disconnect the engine coolant temperature sensor connector.

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

Standard Resistance:

for RHD
Tester Connection
Condition
Specified Condition
C18-2 - C46-76 (THW)
Always
Below 1 Ω
C18-1 - C46-98 (E2)
Always
Below 1 Ω
C18-2 or C46-76 (THW) - Body ground
Always
10 kΩ or higher

for RHD
Tester Connection
Condition
Specified Condition
C18-2 - C45-76 (THW)
Always
Below 1 Ω
C18-1 - C45-98 (E2)
Always
Below 1 Ω
C18-2 or C45-76 (THW) - 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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

59.INSPECT MASS AIR FLOW METER ASSEMBLY

Inspect the mass air flow meter assembly (Click here).
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 ASSEMBLY (Click here)

OK

60.READ VALUE USING GTS

Connect the GTS to the DLC3.

Turn the engine switch on (IG).
HINT:
The A/C switch and all accessory switches should be off.

Idle the engine.

Using the GTS, read the value of IGN Advance and Knock Correct Learn Value in the Data List.

Result
Freeze Frame Data Item for DTC P1605		Proceed to
IGN Advance	Knock Correct Learn Value
Differs from the current value of the vehicle by 10° or more	Less than 3°	A
	3° or more	B
Differs from the current value of the vehicle by less than 10°	-

HINT:

If the results of the checks performed in steps 56 to 64 were all normal and the sum of ISC Feedback Value and ISC Learning Value in the Data List is 120% of the normal value or more, check for carbon deposits in the throttle body assembly. If there are carbon deposits, clean them off to finish the troubleshooting procedure.

END

CHECK KNOCK SENSOR CIRCUIT

61.CHECK TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE)

Disconnect the fuel injector connector.

Turn the engine switch on (IG).

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

Standard Voltage:

Cylinder	Tester Connection	Switch Condition	Specified Condition
No. 1	a5-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 2	a1-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 3	a6-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 4	a2-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 5	a7-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 6	a3-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 7	a8-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 8	a4-2 - Body ground	Engine switch on (IG)	11 to 14 V

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

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.

CHECK FUEL INJECTOR ASSEMBLY

OK

62.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (Click here).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

63.CHECK FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

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	Value displayed for Air Conditioner FB Val does not increase	Does not change from OFF	Power steering system	A
		Changes from OFF to ON	-
A/C Signal display changes from OFF to ON	Value displayed for Air Conditioner FB Val increases	Changes from OFF to ON	Power steering system
		Does not change from OFF	A/C system	B

HINT:

*1: Check not only the on/off state of the air conditioner, but also the change in air conditioner load.
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 47, and if there are no problems with other parts, inspect the power steering system (refer to step 55).

CHECK AIR CONDITIONING SYSTEM (Click here)

A

64.CHECK FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

Result
Freeze Frame Data Item for DTC P1605				Suspected Area	Proceed to
Electrical Load Signal or Electric Load Feedback Val	Electric Load Feedback Val	Difference between Engine Speed and Turbine Speed	Vehicle Speed	Suspected Area	Proceed to
Electrical Load Signal display changes from OFF to ON1, or value displayed for Electric Load Feedback Val increases1	Value displayed for Electric Load Val changes	-	-	Electrical load signal circuit	C
	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 30 km/h	A/T system	B
			30 km/h or more	-	A
		All 5 sets of freeze frame data are 100 rpm or more	-	-	A
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 30 km/h	A/T system	B
			30 km/h or more	-	A
		All 5 sets of freeze frame data are 100 rpm or more	-	-	A

HINT:

*1: 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.
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 A/T system may have been malfunctioning. Continue this inspection procedure until step 47, and if there are no problems with other parts, inspect the electrical load system and/or A/T system (refer to step 55).

CHECK AUTOMATIC TRANSMISSION SYSTEM

CHECK GENERATOR CIRCUIT (Click here)

A

65.CHECK FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

Result
Freeze Frame Data Item for DTC P1605		Suspected Area	Proceed to
P Position or N Position	Park/Neutral Position Switch	Suspected Area	Proceed to
P and N position are both OFF in at least one data set	In D or R, NSW is ON	Park/neutral position switch assembly	A
P and N position are both OFF in at least one data set	In D or R, NSW is OFF	A/T 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 A/T system may have been malfunctioning. If there are no problems with other parts, inspect the park/neutral position switch and/or A/T system (refer to step 55).

CHECK AUTOMATIC TRANSMISSION SYSTEM

CHECK FOR INTERMITTENT PROBLEMS (Click here)

CHECK PARK/NEUTRAL POSITION SWITCH ASSEMBLY (Click here)

66.CHECK FREEZE FRAME DATA

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Click here).

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

Go to step 70

A

67.CHECK MASS AIR FLOW METER ASSEMBLY

Remove the mass air flow meter assembly.

Check for foreign matter in the airflow 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 54, and if there are no problems with other parts, replace the mass air flow meter assembly (refer to step 55).

REPLACE MASS AIR FLOW METER ASSEMBLY (Click here)

A

68.CHECK HARNESS AND CONNECTOR (ECM - MASS AIR FLOW METER)

Check the harnesses and connectors, referring to DTC P0102 inspection procedure (Click here).
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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

69.PERFORM DRIVE TEST

Connect the GTS to the DLC3.

Start the engine and warm it up until the engine coolant temperature stabilizes.
HINT:
The A/C switch and all accessory switches should be off.

Idle the engine.

Using the GTS, read the value of Calculate Load in the Data List.

Standard
Data List
Specified Condition
Calculate Load
90 to 110% of the current value of the vehicle

REPLACE MASS AIR FLOW METER ASSEMBLY (Click here)

OK

70.CHECK TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE)

Disconnect the fuel injector connector.

Turn the engine switch on (IG).

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

Standard Voltage:

Cylinder	Tester Connection	Switch Condition	Specified Condition
No. 1	a5-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 2	a1-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 3	a6-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 4	a2-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 5	a7-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 6	a3-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 7	a8-2 - Body ground	Engine switch on (IG)	11 to 14 V
No. 8	a4-2 - Body ground	Engine switch on (IG)	11 to 14 V

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

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.

CHECK FUEL INJECTOR ASSEMBLY

OK

71.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (Click here).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

72.PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP DUTY)

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Turn the GTS on.

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

When performing the Active Test, check for an operating sound from the fuel pump.
Standard
Control the Fuel Pump Duty
Specified Condition
25 or 80%
Operating sound heard
OFF
Operating sound not heard
Result
Result
Proceed to
Abnormal
A
Normal
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 77.

Go to step 74

A

73.INSPECT FUEL PUMP

Inspect the fuel pump (Click here).

REPLACE FUEL PUMP (Click here)

CHECK FUEL PUMP CONTROL CIRCUIT (Click here)

74.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check the fuel leaks.
3. Check the fuel pressure.
4. Check the fuel pressure (for high pressure).
  HINT:
  For the fuel system On-vehicle Inspection, refer to the following procedures (Click here).
Result
Result
Proceed to
Abnormal
A
Normal
B

CHECK FOR INTERMITTENT PROBLEMS (Click here)

A

75.CHECK FUEL SYSTEM

Check for foreign matter, such as iron particles, around the 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.

REPAIR OR REPLACE FUEL SYSTEM

A

76.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check the fuel leaks.
3. Check the fuel pressure.
4. Check the fuel pressure (for high pressure).
  HINT:
  For the fuel system On-vehicle Inspection, refer to the following procedures (Click here).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

END

77.CLEAR DTC

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Clear the DTCs (Click here).

END

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

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

Data List	Specified Condition
Calculate Load	90 to 110% of the current value of the vehicle

Tester Connection	Condition	Specified Condition
C18-2 - C46-76 (THW)	Always	Below 1 Ω
C18-1 - C46-98 (E2)	Always	Below 1 Ω
C18-2 or C46-76 (THW) - Body ground	Always	10 kΩ or higher

Activate the VSV for Evap Control	Specified Condition
ON	Air flows
OFF	Air does not flow

Data List	Specified Condition
EVAP (Purge) VSV	Value other than 0% is displayed

Control the Fuel Pump Duty	Specified Condition
25 or 80%	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

GTS Operation	Specified Condition
0%	Normal engine speed
100%	Engine idles roughly or stalls