2Tr-Fe Engine Control. Dtc P1605 Rough Idling

After starting the engine, this DTC is stored when the engine stops without the ignition switch being operated.
Using the Techstream, 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 ignition switch being operated (1 trip detection logic).	Air leak in intake system Purge VSV Brake booster 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 ECM Wire harness or connector Engine immobiliser system

INSPECTION PROCEDURE

HINT:

In contrast to normal malfunction diagnosis for components, circuits and systems, DTC P1605 is 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 Techstream. 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 (HILUX_TGN26 RM000000PDS0WSX.html).
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.

P1605:

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System).
Dtc
P1605 Rough Idling

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	10, 38, 52
	Air-fuel ratio abnormal	Air suction	Intake system connections Purge VSV system Brake booster	5 to 9
		Sensor malfunction (value from sensor too lean)	Mass air flow meter Engine coolant temperature sensor Air fuel ratio sensor system Thermostat	11 to 23
		Sensor malfunction (value from sensor too rich)		39 to 51
		Fuel supply problem	Fuel pump control circuit Purge VSV system Fuel line ECM	24 to 37
	Intake air volume insufficient	Problem with air passage	Intake system connections Mass air flow meter Brake booster PCV valve and hose Purge VSV system	53 to 55
	Intake air volume insufficient	Excessive valve overlap	Camshaft timing oil control valve	56 to 59
	Ignition timing incorrect	Does not operate as expected	Knock sensor Engine coolant temperature sensor Mass air flow meter	60 to 64
Rapidly decreases and engine stalls*	Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (fuel injector assembly, ignition coil assembly)	65, 66
Rapidly decreases and engine stalls*	External part malfunctioning	Increase in load	Air conditioning system Electrical load signal system Power steering system	67, 68

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 Techstream to the DLC3.

Turn the ignition switch to ON.

Turn the Techstream on.

Enter the following menus: Powertrain / Engine / DTC.

Read the DTCs (HILUX_TGN26 RM000000PDK130X.html).

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

GO TO DTC CHART (HILUX_TGN26 RM0000032SF041X.html)

A

2.CHECK FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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 Techstream to the DLC3.

Start the engine.

Idle the engine

Enter the following menus: Powertrain / Engine / 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

CHECK ENGINE IMMOBILISER SYSTEM (HILUX_TGN26 RM000000Z3201BX.html)

OK

4.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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

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.

*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.

Go to step 38

Go to step 52

Go to step 63

A

5.CHECK INTAKE SYSTEM

Check for air leakage in the intake system [vacuum hose disconnection, cracks, damaged gaskets, etc.] (HILUX_TGN26 RM000001A3W024X.html).
HINT:
1. If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the vacuum inside the intake pipes increases and the air suction noise becomes louder.
2. If Short FT and Long FT are largely different from the normal values when idling (the intake air volume is small) and almost the same as the normal values when racing the engine (the intake air volume is high), air leakage may be present.
OK:
There is no air suction.

REPAIR OR REPLACE INTAKE SYSTEM

OK

6.CHECK PURGE VSV

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

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 (HILUX_TGN26 RM000000PDK130X.html).

REPLACE PURGE VSV (HILUX_TGN26 RM00000142800ZX.html)

OK

7.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.html).

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

Go to step 10

A

8.READ VALUE USING TECHSTREAM (SHORT FT)

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

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 Techstream, read the value of Short FT #1 in the Data List while depressing the brake pedal.
Standard:
Short FT #1 changes by +10% or less.
HINT:
When air leakage from the brake booster is present, the feedback compensation increases because the air-fuel ratio becomes lean.

INSPECT BRAKE BOOSTER ASSEMBLY (HILUX_TGN26 RM000004Z5O000X.html)

OK

9.PERFORM DRIVE TEST

Connect the Techstream 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 Techstream, read the value of Short FT #1 in the Data List.

Standard:

Data List
Condition
Specified Condition
Short FT #1 + Long FT #1
The conditions of the vehicle are matched to those present when the problem occurs
-15 to +15%

INSPECT BRAKE BOOSTER ASSEMBLY (HILUX_TGN26 RM000004Z5O000X.html)

OK

10.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (HILUX_TGN26 RM000000SM604YX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

11.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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	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 15

A

12.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

REPLACE MASS AIR FLOW METER (HILUX_TGN26 RM000000VW602CX.html)

A

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

Check the harnesses and connectors, referring to DTC P0102 inspection procedure (HILUX_TGN26 RM000000U5B0OZX_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

14.PERFORM DRIVE TEST

Connect the Techstream 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 Techstream, 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 18

REPLACE MASS AIR FLOW METER (HILUX_TGN26 RM000000VW602CX.html)

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

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

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

Idle the engine.

Enter the following menus: Powertrain / Engine / 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:

Techstream 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 18

A

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

Check the harnesses and connectors, referring to DTC P0031 inspection procedure (HILUX_TGN26 RM000000WC10SBX_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 (HILUX_TGN26 RM000000WC10SBX_08.html)

OK

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

Check the harnesses and connectors, referring to DTC P2237 inspection procedure (HILUX_TGN26 RM000000XOK0DEX_08_0010.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

18.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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 21

A

19.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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 22

Go to step 24

A

20.INSPECT THERMOSTAT

HINT:

For the thermostat inspection, refer to the following procedures (HILUX_TGN26 RM00000145B01IX.html).

Result
Result	Proceed to
Abnormal	A
Normal	B

Go to step 22

REPLACE THERMOSTAT (HILUX_TGN26 RM00000145D014X.html)

21.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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 24

A

22.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (HILUX_TGN26 RM000000VW801AX.html).

Result
Result	Proceed to
Normal	A
Abnormal	B

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (HILUX_TGN26 RM000000VWA01WX.html)

A

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

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:

Tester Connection
Condition
Specified Condition
C75-32 (THW) - C17-2
Always
Below 1 Ω
C75-28 (E2) - C17-1
Always
Below 1 Ω
C75-32 (THW) or C17-2 - 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

24.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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 33

A

25.PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR EVAP CONTROL)

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

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Start the engine.

Enter the following menus: Powertrain / Engine / 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 33

A

26.INSPECT PURGE VSV

Inspect the purge VSV (HILUX_TGN26 RM00000142600ZX.html).

REPLACE PURGE VSV (HILUX_TGN26 RM00000142800ZX.html)

OK

27.CHECK TERMINAL VOLTAGE (PURGE VSV POWER SOURCE)

Disconnect the purge VSV connector.

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
C69-2 - Body ground
Ignition switch ON
11 to 14 V
Text in Illustration
*a
Front view of wire harness connector
(to Purge VSV)
HINT:
1. Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
2. Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR PURGE VSV POWER SOURCE CIRCUIT (HILUX_TGN26 RM000000VSO0I2X.html)

OK

28.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:

Tester Connection
Condition
Specified Condition
C69-1 - C76-23 (PRG)
Always
Below 1 Ω
C69-1 or C76-23 (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

29.CLEAR DTC

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Turn the Techstream on.

Clear the DTCs (HILUX_TGN26 RM000000PDK130X.html).

NEXT

30.READ VALUE USING TECHSTREAM (EVAP (Purge) VSV)

Connect the Techstream 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 Techstream, 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 (HILUX_TGN26 RM000000PDQ0Z2X.html)

A

31.PERFORM ACTIVE TEST USING TECHSTREAM

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

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Start the engine.

Enter the following menus: Powertrain / Engine / 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 (HILUX_TGN26 RM000000PDQ0Z2X.html)

A

32.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 (HILUX_TGN26 RM000000VW202TX.html)

33.PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED)

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Turn the Techstream on.

Enter the following menus: Powertrain / Engine / 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 34.

Go to step 35

A

34.INSPECT FUEL PUMP

Inspect the fuel pump (HILUX_TGN26 RM000000YLJ01MX.html).

REPLACE FUEL PUMP (HILUX_TGN26 RM000004PZ300BX.html)

CHECK FUEL PUMP CONTROL CIRCUIT (HILUX_TGN26 RM000001DN704OX.html)

35.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check the fuel leaks.
3. Check the fuel pressure.
4. Perform the Active Test.

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (HILUX_TGN26 RM000000YL704TX.html).

Result
Result	Proceed to
Abnormal	A
Normal	B

CHECK FOR INTERMITTENT PROBLEMS (HILUX_TGN26 RM000000PDQ0Z2X.html)

A

36.CHECK FUEL SYSTEM

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

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

REPAIR OR REPLACE FUEL SYSTEM

A

37.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check the fuel leaks.
3. Check the fuel pressure.
4. Perform the Active Test.

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (HILUX_TGN26 RM000000YL704TX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

END

38.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (HILUX_TGN26 RM000000SM604YX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

39.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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	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 43

Go to step 46

A

40.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

REPLACE MASS AIR FLOW METER (HILUX_TGN26 RM000000VW602CX.html)

A

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

Check the harnesses and connectors, referring to DTC P0102 inspection procedure (HILUX_TGN26 RM000000U5B0OZX_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

42.PERFORM DRIVE TEST

Connect the Techstream 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 Techstream, 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 (HILUX_TGN26 RM000000VW602CX.html)

OK

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

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

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

Idle the engine.

Enter the following menus: Powertrain / Engine / 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:

Techstream 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 46

A

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

Check the harnesses and connectors, referring to DTC P0031 inspection procedure (HILUX_TGN26 RM000000WC10SBX_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 (HILUX_TGN26 RM000000WC10SBX_08.html)

OK

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

Check the harnesses and connectors, referring to DTC P2237 inspection procedure (HILUX_TGN26 RM000000XOK0DEX_08_0010.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

46.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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 49

A

47.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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 50

Go to step 75

A

48.INSPECT THERMOSTAT

HINT:

For the thermostat inspection, refer to the following procedures (HILUX_TGN26 RM00000145B01IX.html).

Result
Result	Proceed to
Abnormal	A
Normal	B

HINT:

This step is not directly related to engine stall.

Go to step 50

REPLACE THERMOSTAT (HILUX_TGN26 RM00000145D014X.html)

49.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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 78

A

50.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (HILUX_TGN26 RM000000VW801AX.html).

Result
Result	Proceed to
Normal	A
Abnormal	B

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (HILUX_TGN26 RM000000VWA01WX.html)

A

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

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:

Tester Connection
Condition
Specified Condition
C75-32 (THW) - C17-2
Always
Below 1 Ω
C75-28 (E2) - C17-1
Always
Below 1 Ω
C75-32 (THW) or C17-2 - 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 (HILUX_TGN26 RM000000PDQ0Z2X.html)

52.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (HILUX_TGN26 RM000000SM604YX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

53.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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 56

A

54.CHECK INTAKE SYSTEM

Check for air leakage in the intake system [vacuum hose disconnection, cracks, damaged gaskets, etc.] (HILUX_TGN26 RM000001A3W024X.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.

REPAIR OR REPLACE INTAKE SYSTEM

OK

55.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

Go to step 60

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

56.PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINEAR)

Connect the Techstream to the DLC3.

Turn the Techstream on.

Warm up the engine.

Enter the following menus: Powertrain / Engine / 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 Techstream.

OK:

Techstream 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 (HILUX_TGN26 RM000000VVZ01FX.html)

OK

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

Check the harnesses and connectors, referring to DTC P0010 inspection procedure (HILUX_TGN26 RM000000PDW0PJX_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

58.READ FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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 (HILUX_TGN26 RM000000PDQ0Z2X.html)

A

59.INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (HILUX_TGN26 RM000000VW801AX.html).

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (HILUX_TGN26 RM000000VWA01WX.html)

OK

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

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:

Tester Connection
Condition
Specified Condition
C75-32 (THW) - C17-2
Always
Below 1 Ω
C75-28 (E2) - C17-1
Always
Below 1 Ω
C75-32 (THW) or C17-2 - 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

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

Inspect the mass air flow meter (HILUX_TGN26 RM000000VW401EX.html).
HINT:
If the intake air temperature sent to the ECM is higher than the standard due to the mass air flow meter (intake air temperature sensor) malfunctioning, the ignition timing may become delayed.

REPLACE MASS AIR FLOW METER (HILUX_TGN26 RM000000VW602CX.html)

OK

62.READ VALUE USING TECHSTREAM

Connect the Techstream 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 Techstream, 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 (HILUX_TGN26 RM000000SVT0QPX.html)

63.CHECK TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE)

Disconnect the fuel injector assembly connectors.

Turn the ignition switch to ON.

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

Standard Voltage:

Cylinder	Tester Connection	Switch Condition	Specified Condition
No. 1	C65-1 - Body ground	Ignition switch ON	11 to 14 V
No. 2	C2-1 - Body ground	Ignition switch ON	11 to 14 V
No. 3	C66-1 - Body ground	Ignition switch ON	11 to 14 V
No. 4	C4-1 - Body ground	Ignition switch ON	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.)

REPAIR FUEL INJECTOR POWER SOURCE CIRCUIT (HILUX_TGN26 RM00000330203TX.html)

OK

64.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (HILUX_TGN26 RM000000SM604YX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

65.CHECK FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.html).

Result
Freeze Frame Data Item for DTC P1605			Suspected Area	Proceed to
A/C Signal	Air Conditioner FB Val	Power Steering Signal
A/C Signal display does not change from OFF*1	-	Does not change from OFF	-	A
		Changes from OFF to ON	Power steering system
A/C Signal display changes from OFF to ON*1	Value displayed for Air Conditioner FB Val does not increase	Changes from OFF to ON
		Does not change from OFF	-
	Value displayed for Air Conditioner FB Val increases	-	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.
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 (HILUX_TGN26 RM000002LIM05EX.html)

A

66.CHECK FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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	Suspected Area	Proceed to
Electrical Load Signal display changes from OFF to ON3, or value displayed for Electric Load Feedback Val increases	Value displayed for Electric Load Val changes	Electrical load signal circuit	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	-	-	B

HINT:

*: 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.

Go to step 67

CHECK GENERATOR CIRCUIT (HILUX_TGN26 RM000000V4301SX.html)

67.CHECK FREEZE FRAME DATA

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (HILUX_TGN26 RM000000PDS0WSX.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 71

A

68.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

REPLACE MASS AIR FLOW METER (HILUX_TGN26 RM000000VW602CX.html)

A

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

Check the harnesses and connectors, referring to DTC P0102 inspection procedure (HILUX_TGN26 RM000000U5B0OZX_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

70.PERFORM DRIVE TEST

Connect the Techstream 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 Techstream, 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 (HILUX_TGN26 RM000000VW602CX.html)

OK

71.CHECK TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE)

Disconnect the fuel injector assembly connectors.

Turn the ignition switch to ON.

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

Standard Voltage:

Cylinder	Tester Connection	Switch Condition	Specified Condition
No. 1	C65-1 - Body ground	Ignition switch ON	11 to 14 V
No. 2	C2-1 - Body ground	Ignition switch ON	11 to 14 V
No. 3	C66-1 - Body ground	Ignition switch ON	11 to 14 V
No. 4	C4-1 - Body ground	Ignition switch ON	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.)

REPAIR FUEL INJECTOR POWER SOURCE CIRCUIT (HILUX_TGN26 RM00000330203TX.html)

OK

72.CHECK IGNITION SYSTEM

Perform ignition system On-vehicle Inspection (HILUX_TGN26 RM000000SM604YX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK

73.PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED)

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Turn the Techstream on.

Enter the following menus: Powertrain / Engine / 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 77.

Go to step 75

A

74.INSPECT FUEL PUMP

Inspect the fuel pump (HILUX_TGN26 RM000000YLJ01MX.html).

REPLACE FUEL PUMP (HILUX_TGN26 RM000004PZ300BX.html)

CHECK FUEL PUMP CONTROL CIRCUIT (HILUX_TGN26 RM000001DN704OX.html)

75.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check the fuel leaks.
3. Check the fuel pressure.
4. Perform the Active Test.

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (HILUX_TGN26 RM000000YL704TX.html).

Result
Result	Proceed to
Abnormal	A
Normal	B

CHECK FOR INTERMITTENT PROBLEMS (HILUX_TGN26 RM000000PDQ0Z2X.html)

A

76.CHECK FUEL SYSTEM

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

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

REPAIR OR REPLACE FUEL SYSTEM

A

77.CHECK FUEL SYSTEM

Check the fuel system.
1. Check the fuel pump operation.
2. Check the fuel leaks.
3. Check the fuel pressure.

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (HILUX_TGN26 RM000000YL704TX.html).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

END

78.CLEAR DTC

Connect the Techstream to the DLC3.

Turn the ignition switch to ON.

Turn the Techstream on.

Clear the DTCs (HILUX_TGN26 RM000000PDK130X.html).

END

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

Data List Item	Result
Immobiliser Communication	ON
Immobiliser Fuel Cut	OFF

Data List	Condition	Specified Condition
Short FT #1 + Long FT #1	The conditions of the vehicle are matched to those present when the problem occurs	-15 to +15%

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

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
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

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