1Gr-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 run 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 Engine coolant temperature sensor Thermostat Power supply circuit (purge VSV, air fuel ratio sensor, fuel injector assembly, ignition coil assembly) Fuel pump Fuel pump control circuit Fuel line PCV valve and hose Camshaft timing oil control valve Knock sensor Ignition system Air conditioning system Power steering system Electrical load signal system Charging system A/T system Park/neutral position switch assembly ECM Wire harness or connector Immobiliser system

P1605

This DTC is stored if the engine speed drops below the set speed 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 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 without the engine switch being operated (1 trip detection logic).	Air leak in intake system Purge VSV Mass air flow meter Engine coolant temperature sensor Thermostat Power supply circuit (purge VSV, air fuel ratio sensor, fuel injector assembly, ignition coil assembly) Fuel pump Fuel pump control circuit Fuel line PCV valve and hose Camshaft timing oil control valve Knock sensor Ignition system Air conditioning system Power steering system Electrical load signal system Charging system A/T system Park/neutral position switch assembly ECM Wire harness or connector Immobiliser system

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 (LandCruiser RM000000PDS15AX.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, 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, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-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 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	Ignition system abnormal	Igniter abnormal	Power supply circuit Ignition coil assemblies Spark plug	7, 35, 49
		Air-fuel ratio abnormal	Air suction	Intake system connections Purge VSV system	5, 6
			Sensor malfunction (value from sensor too lean)	Mass air flow meter Engine coolant temperature sensor Air fuel ratio sensor system Thermostat	8 to 20
			Sensor malfunction (value from sensor too rich)		36 to 48
			Fuel supply problem	Fuel pump control circuit Purge VSV system Fuel line ECM	21 to 34
		Intake air volume insufficient	Problem with air passage	Intake system connections Mass air flow meter PCV valve and hose Purge VSV system	50 to 52
		Intake air volume insufficient	Excessive valve overlap	Camshaft timing oil control valve	53 to 56
		Ignition timing incorrect	Does not operate as expected	Knock sensor Engine coolant temperature sensor Mass air flow meter	57 to 61
	Rapidly decreases and engine stalls	Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (fuel injector assembly, ignition coil assembly)	62, 63
	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	64 to 67
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	68 to 71
		Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (fuel injector assembly, ignition coil assembly)	72, 73
		Fuel supply problem	Fuel leak, clog	Fuel pump control circuit Fuel line	74 to 78

P1605:

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.

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	7, 35, 49
	Air-fuel ratio abnormal	Air suction	Intake system connections Purge VSV system	5, 6
		Sensor malfunction (value from sensor too lean)	Mass air flow meter Engine coolant temperature sensor Air fuel ratio sensor system Thermostat	8 to 20
		Sensor malfunction (value from sensor too rich)		36 to 48
		Fuel supply problem	Fuel pump control circuit Purge VSV system Fuel line ECM	21 to 34
	Intake air volume insufficient	Problem with air passage	Intake system connections Mass air flow meter PCV valve and hose Purge VSV system	50 to 52
	Intake air volume insufficient	Excessive valve overlap	Camshaft timing oil control valve	53 to 56
	Ignition timing incorrect	Does not operate as expected	Knock sensor Engine coolant temperature sensor Mass air flow meter	57 to 61
Rapidly decreases and engine stalls	Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (fuel injector assembly, ignition coil assembly)	62, 63
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	64 to 67

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 (LandCruiser RM000000PDK1DIX.html).

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

GO TO DTC CHART (LandCruiser RM000002ZSO015X.html)

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 (LandCruiser RM000000PDS15AX.html).
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.

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

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

CHECK ENGINE IMMOBILISER SYSTEM (LandCruiser RM000000QY40G3X.html)

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 (LandCruiser RM000000PDS15AX.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 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

5.CHECK INTAKE SYSTEM

Check for air leakage in the intake system [vacuum hose disconnection, cracks, damaged gaskets, etc.] (LandCruiser RM0000046C000QX.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 leakage.
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after repairing or replacing the intake system (LandCruiser RM000004NJC03SX.html).

REPAIR OR REPLACE INTAKE SYSTEM

OK

6.CHECK PURGE VSV

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

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 (LandCruiser RM000000PDK1DIX.html).

REPLACE PURGE VSV (LandCruiser RM000002WOT018X.html)

OK

7.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (LandCruiser RM000000SM6078X.html).
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after repairing or replacing the ignition system (LandCruiser RM000004NJC03SX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

8.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 (LandCruiser RM000000PDS15AX.html).

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	A
AFS Voltage B1S1 AFS Voltage B2S1	3.3 V or higher*2	Air fuel ratio sensor Wire harness or connector	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 12

A

9.CHECK MASS AIR FLOW METER

Remove the Mass air flow meter.

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

Result
Result
Proceed to
Visible foreign matter is not present
A
Visible foreign matter is present
B
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly (LandCruiser RM000004NJC03SX.html).

REPLACE MASS AIR FLOW METER (LandCruiser RM000000VW603AX.html)

A

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

Check the harnesses and connectors, referring to DTC P0102 inspection procedure (LandCruiser RM000000U5B0U3X_09_0004.html).
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

11.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
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly (LandCruiser RM000004NJC03SX.html).

Go to step 15

REPLACE MASS AIR FLOW METER (LandCruiser RM000000VW603AX.html)

12.PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)

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 for A/F Sensor.

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 for A/F Sensor (+12.5%)	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
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 15

A

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

Check the harnesses and connectors, referring to DTC P0031 inspection procedure (LandCruiser RM000000WC10Z7X_09_0004.html).
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 AIR FUEL RATIO SENSOR POWER SOURCE CIRCUIT (LandCruiser RM000000WC10Z7X.html)

OK

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

Check the harnesses and connectors, referring to DTC P2237 inspection procedure (LandCruiser RM0000028K60IBX_10_0007.html).
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

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 (LandCruiser RM000000PDS15AX.html).

Result
Freeze Frame Data Item for DTC P1605	Result	Proceed to
Initial Engine Coolant Temp, Ambient Temp for A/C, 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 18

A

16.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 (LandCruiser RM000000PDS15AX.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 19

Go to step 21

A

17.INSPECT THERMOSTAT

HINT:

For the thermostat inspection, refer to the following procedures (LandCruiser RM000000V1K071X.html).

Result
Result	Proceed to
Abnormal	A
Normal	B

Go to step 19

REPLACE THERMOSTAT (LandCruiser RM000002BG803TX.html)

18.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 (LandCruiser RM000000PDS15AX.html).

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 21

A

19.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (LandCruiser RM0000018I6023X.html).

Result
Result	Proceed to
Normal	A
Abnormal	B

HINT:
for Automatic Transmission

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor (LandCruiser RM000004NJC03SX.html).

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (LandCruiser RM000000PWT056X.html)

A

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

Check the harnesses and connectors, referring to DTC P0115 inspection procedure (LandCruiser RM000000PF50ZYX_09_0003.html).

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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

21.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 (LandCruiser RM000000PDS15AX.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 30

A

22.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.
OK:
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 30

A

23.INSPECT PURGE VSV

Inspect the purge VSV (LandCruiser RM0000029LK03UX.html).

REPLACE PURGE VSV (LandCruiser RM000002WOT018X.html)

OK

24.CHECK TERMINAL VOLTAGE (PURGE VSV POWER SOURCE)

Check the harnesses and connectors, referring to DTC P0443 inspection procedure (LandCruiser RM000000VSO0MLX_04_0003.html).

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.

REPAIR PURGE VSV POWER SOURCE CIRCUIT (LandCruiser RM000000VSO0MLX.html)

OK

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

Check the harnesses and connectors, referring to DTC P0443 inspection procedure (LandCruiser RM000000VSO0MLX_04_0005.html).

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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

26.CLEAR DTC

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Turn the GTS on.

Clear the DTCs (LandCruiser RM000000PDK1DIX.html).

NEXT

27.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 (LandCruiser RM000000PDQ18TX.html)

A

28.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.
OK:
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 (LandCruiser RM000000PDQ18TX.html)

A

29.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.

RECONNECT CONNECTOR CORRECTLY

REPLACE ECM (LandCruiser RM00000329203TX.html)

30.PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)

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 / Speed.

When performing the Active Test, check for an operating sound from the fuel pump.

Standard:

Control the Fuel Pump / Speed
Specified Condition
ON
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 31.

Go to step 32

A

31.INSPECT FUEL PUMP

Inspect the fuel pump (for Single Tank Type) (LandCruiser RM0000045QR00TX.html).

Inspect the fuel pump (for Double Tank Type) (LandCruiser RM0000045QV009X.html).

Result
Result
Proceed to
OK
A
NG (for Single Tank Type)
B
NG (for Double Tank Type)
C
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after replacing the fuel pump (LandCruiser RM000004NJC03SX.html).

REPLACE FUEL PUMP (FOR SINGLE TANK TYPE) (LandCruiser RM0000045QT00YX.html)

REPLACE FUEL PUMP (FOR DOUBLE TANK TYPE) (LandCruiser RM0000045QX00BX.html)

CHECK FUEL PUMP CONTROL CIRCUIT (LandCruiser RM0000030MH07PX.html)

32.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check for fuel leaks.
3. Check the fuel pressure.
4. Perform the Active Test [Control the Select Cylinder Fuel Cut].

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (LandCruiser RM000000YL706HX.html).

Result
Result	Proceed to
Abnormal	A
Normal	B

CHECK FOR INTERMITTENT PROBLEMS (LandCruiser RM000000PDQ18TX.html)

A

33.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 no foreign matter and no signs that fuel pump was stuck
A
There is foreign matter or 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

34.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check for fuel leaks.
3. Check the fuel pressure.
4. Perform the Active Test [Control the Select Cylinder Fuel Cut].

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (LandCruiser RM000000YL706HX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

END

35.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (LandCruiser RM000000SM6078X.html).
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after repairing or replacing the ignition system (LandCruiser RM000004NJC03SX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

36.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 (LandCruiser RM000000PDS15AX.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 B1S1 AFS Voltage B2S1	Below 3.3 V*2	Air fuel ratio sensor Harness and connector	B
Both freeze frame data items listed above	Values are other than above	-	C

HINT:

*1: If the Mass air flow meter is malfunctioning and incorrectly measures the intake air volume to be higher 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 40

Go to step 43

A

37.CHECK MASS AIR FLOW METER

Remove the mass airflow meter.

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
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly (LandCruiser RM000004NJC03SX.html).

REPLACE MASS AIR FLOW METER (LandCruiser RM000000VW603AX.html)

A

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

Check the harnesses and connectors, referring to DTC P0102 inspection procedure (LandCruiser RM000000U5B0U3X_09_0004.html).
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

39.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
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly (LandCruiser RM000004NJC03SX.html).

REPLACE MASS AIR FLOW METER (LandCruiser RM000000VW603AX.html)

OK

40.PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)

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 for A/F Sensor.

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 for A/F Sensor (+12.5%)	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
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 43

A

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

Check the harnesses and connectors, referring to DTC P0031 inspection procedure (LandCruiser RM000000WC10Z7X_09_0004.html).
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 AIR FUEL RATIO SENSOR POWER SOURCE CIRCUIT (LandCruiser RM000000WC10Z7X.html)

OK

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

Check the harnesses and connectors, referring to DTC P2237 inspection procedure (LandCruiser RM0000028K60IBX_10_0007.html).
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

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 (LandCruiser RM000000PDS15AX.html).

Result
Freeze Frame Data Item for DTC P1605	Result	Proceed to
Initial Engine Coolant Temp, Ambient Temp for A/C, 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 46

A

44.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 (LandCruiser RM000000PDS15AX.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	B
	Range C	-	C

HINT:

This step is not directly related to engine stall.

Go to step 47

Go to step 76

A

45.INSPECT THERMOSTAT

HINT:

For the thermostat inspection, refer to the following procedures (LandCruiser RM000000V1K071X.html).

Result
Result	Proceed to
Abnormal	A
Normal	B

HINT:

This step is not directly related to engine stall.

Go to step 47

REPLACE THERMOSTAT (LandCruiser RM000002BG803TX.html)

46.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 (LandCruiser RM000000PDS15AX.html).

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 79

A

47.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (LandCruiser RM0000018I6023X.html).

Result
Result	Proceed to
Normal	A
Abnormal	B

HINT:
for Automatic Transmission

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor (LandCruiser RM000004NJC03SX.html).

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (LandCruiser RM000000PWT056X.html)

A

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

Check the harnesses and connectors, referring to DTC P0115 inspection procedure (LandCruiser RM000000PF50ZYX_09_0003.html).

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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK FOR INTERMITTENT PROBLEMS (LandCruiser RM000000PDQ18TX.html)

49.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (LandCruiser RM000000SM6078X.html).
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after repairing or replacing the ignition system (LandCruiser RM000004NJC03SX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

50.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 (LandCruiser RM000000PDS15AX.html).

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 53

A

51.CHECK INTAKE SYSTEM

Check for air leakage in the intake system [vacuum hose disconnection, cracks, damaged gaskets, etc.] (LandCruiser RM0000046C000QX.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 leakage.
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after repairing or replacing the intake system (LandCruiser RM000004NJC03SX.html).

REPAIR OR REPLACE INTAKE SYSTEM

OK

52.CHECK INTAKE SYSTEM

Check the intake system.
1. Inspect the brake booster assembly.
2. Inspect the Mass air flow meter.
3. Check the PCV hose.
4. Inspect the PCV valve.
5. Inspect the purge VSV.
Result
Result
Proceed to
Abnormal
A
Normal
B
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly (LandCruiser RM000004NJC03SX.html).

Go to step 57

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

53.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 P or N.

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 (LandCruiser RM000000PWP065X.html)

OK

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

Check the harnesses and connectors, referring to DTC P0010 inspection procedure (LandCruiser RM000000PDW0VKX_09_0003.html).
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

55.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 P or N.

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 (LandCruiser RM000000PWP065X.html)

OK

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

Check the harnesses and connectors, referring to DTC P0013 inspection procedure (LandCruiser RM000000XH70LCX_10_0012.html).
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

57.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 (LandCruiser RM000000PDS15AX.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° or more	Less than 3°	Engine coolant temperature sensor Mass air flow meter Knock sensor	A
	3° or more	-	B
Differs from the current value of the vehicle by less than 10°	-	-

CHECK FOR INTERMITTENT PROBLEMS (LandCruiser RM000000PDQ18TX.html)

A

58.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (LandCruiser RM0000018I6023X.html).

for Automatic Transmission

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor (LandCruiser RM000004NJC03SX.html).

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (LandCruiser RM000000PWT056X.html)

OK

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

Check the harnesses and connectors, referring to DTC P0115 inspection procedure (LandCruiser RM000000PF50ZYX_09_0003.html).

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.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

60.INSPECT MASS AIR FLOW METER (INTAKE AIR TEMPERATURE SENSOR)

Inspect the mass air flow meter (LandCruiser RM000002S6O02BX.html).
HINT:
1. 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.
for Automatic Transmission
1. Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly (LandCruiser RM000004NJC03SX.html).

REPLACE MASS AIR FLOW METER (LandCruiser RM000000VW603AX.html)

OK

61.READ VALUE USING GTS

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 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 (LandCruiser RM000000SVT0XEX.html)

62.INSPECT TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE)

Check the harnesses and connectors, referring to DTC P0300 inspection procedure (LandCruiser RM000000XH3129X_15_0032.html).

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.

REPAIR FUEL INJECTOR CIRCUIT (LandCruiser RM00000330205QX.html)

OK

63.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (LandCruiser RM000000SM6078X.html).
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after repairing or replacing the ignition system (LandCruiser RM000004NJC03SX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

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 (LandCruiser RM000000PDS15AX.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 changes from OFF to ON*1	Value displayed for Air Conditioner FB Val increases	-	A/C system	B
	Value displayed for Air Conditioner FB Val does not increase	Does not change from OFF	-	A1 C2
		Changes from OFF to ON	Power steering system
A/C Signal display does not change from OFF	-	Changes from OFF to ON
		Does not change from OFF	-

*1: for A/T
*2: for M/T

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 and/or A/C system may have been malfunctioning. If there are no problems with other parts, inspect the power steering system and/or A/C system.

CHECK AIR CONDITIONING SYSTEM

Go to step 67

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 (LandCruiser RM000000PDS15AX.html).

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 SPD (NT)	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. If there are no problems with other parts, inspect the electrical load system and/or A/T system.

CHECK AUTOMATIC TRANSMISSION SYSTEM

CHECK GENERATOR CIRCUIT (LandCruiser RM000001AR90C2X.html)

A

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 (LandCruiser RM000000PDS15AX.html).

Result
Freeze Frame Data Item for DTC P1605		Suspected Area	Proceed to
Shift SW Status (P Range) Shift SW Status (N Range)	Neutral Position SW Signal	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 assembly and/or A/T system may have been malfunctioning. If there are no problems with other parts, inspect the park/neutral position switch assembly and/or A/T system.

CHECK AUTOMATIC TRANSMISSION SYSTEM

CHECK FOR INTERMITTENT PROBLEMS (LandCruiser RM000000PDQ18TX.html)

INSPECT PARK/NEUTRAL POSITION SWITCH

67.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 (LandCruiser RM000000PDS15AX.html).

Result
Freeze Frame Data Item for DTC P1605		Proceed to
Electrical Load Signal or Electric Load Feedback Val	Electric Load Feedback Val
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	A
	Value displayed for Electric Load Val does not change	B
Electrical Load Signal display does not change from OFF, or value displayed for Electric Load Feedback Val does not increase	-

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 may have been malfunctioning. If there are no problems with other parts, inspect the electrical load system.

CHECK FOR INTERMITTENT PROBLEMS (LandCruiser RM000000PDQ18TX.html)

CHECK GENERATOR CIRCUIT (LandCruiser RM000001AR90C2X.html)

68.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 (LandCruiser RM000000PDS15AX.html).

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	A
Throttle Sensor Position, Calculate Load	Calculate Load does not decrease while Throttle Sensor Position increases	-	B

Go to step 72

A

69.CHECK MASS AIR FLOW METER

Remove the Mass air flow meter (LandCruiser RM000000VW603AX.html).

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

Result
Result
Proceed to
Visible foreign matter is not present
A
Visible foreign matter is present
B
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly (LandCruiser RM000004NJC03SX.html).

REPLACE MASS AIR FLOW METER (LandCruiser RM000000VW603AX.html)

A

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

Check the harnesses and connectors, referring to DTC P0102 inspection procedure (LandCruiser RM000000U5B0U3X_09_0004.html).
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

71.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
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly (LandCruiser RM000004NJC03SX.html).

REPLACE MASS AIR FLOW METER (LandCruiser RM000000VW603AX.html)

OK

72.INSPECT TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE)

Check the harnesses and connectors, referring to DTC P0300 inspection procedure (LandCruiser RM000000XH3129X_15_0032.html).

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.

REPAIR FUEL INJECTOR CIRCUIT (LandCruiser RM00000330205QX.html)

OK

73.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (LandCruiser RM000000SM6078X.html).
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after repairing or replacing the ignition system (LandCruiser RM000004NJC03SX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

74.PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)

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 / Speed.

When performing the Active Test, check for an operating sound from the fuel pump.

Standard:

Control the Fuel Pump / Speed
Specified Condition
ON
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 75.

Go to step 76

A

75.INSPECT FUEL PUMP

Inspect the fuel pump (for Single Tank Type) (LandCruiser RM0000045QR00TX.html).

Inspect the fuel pump (for Double Tank Type) (LandCruiser RM0000045QV009X.html).

Result
Result
Proceed to
OK
A
NG (for Single Tank Type)
B
NG (for Double Tank Type)
C
HINT:
for Automatic Transmission
Perform "Inspection After Repair" after replacing the fuel pump (LandCruiser RM000004NJC03SX.html).

REPLACE FUEL PUMP (FOR SINGLE TANK TYPE) (LandCruiser RM0000045QT00YX.html)

REPLACE FUEL PUMP (FOR DOUBLE TANK TYPE) (LandCruiser RM0000045QX00BX.html)

CHECK FUEL PUMP CONTROL CIRCUIT (LandCruiser RM0000030MH07PX.html)

76.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check for fuel leaks.
3. Check the fuel pressure.
4. Perform the Active Test [Control the Select Cylinder Fuel Cut].

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (LandCruiser RM000000YL706HX.html).

Result
Result	Proceed to
Abnormal	A
Normal	B

CHECK FOR INTERMITTENT PROBLEMS (LandCruiser RM000000PDQ18TX.html)

A

77.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 no foreign matter and no signs that fuel pump was stuck
A
There is foreign matter or 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

78.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check for fuel leaks.
3. Check the fuel pressure.
4. Perform the Active Test [Control the Select Cylinder Fuel Cut].

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (LandCruiser RM000000YL706HX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

END

79.CLEAR DTC

Connect the GTS to the DLC3.

Turn the engine switch on (IG).

Turn the GTS on.

Clear the DTCs (LandCruiser RM000000PDK1DIX.html).

END

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

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 / Speed	Specified Condition
ON	Operating sound heard
OFF	Operating sound not heard

Result	Proceed to
OK	A
NG (for Single Tank Type)	B
NG (for Double Tank Type)	C

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

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