Система Ecd - Tc And Cg Terminal Circuit

Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150 - СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E

CHECK HARNESS AND CONNECTOR (ECM - DLC3)

СИСТЕМА ECD - TC and CG Terminal Circuit

DESCRIPTION

Terminals TC and CG are located in the DLC3.

The DLC3 is located under the instrument panel under cover. When terminals TC and CG are connected, DTCs in normal mode or test mode can be read from the Malfunction Indicator Lamp (MIL) in the combination meter assembly.

Also, terminal SIL is located in the DLC3. This terminal is used for M-OBD communication with the intelligent tester.

WIRING DIAGRAM

Система Ecd - Tc And Cg Terminal Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:

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

1.CHECK DLC3 (CHECK VOLTAGE)

Система Ecd - Tc And Cg Terminal Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

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

Standard Voltage:
Tester Connection Condition Specified Condition
G48-16 (BAT) - G48-4 (CG) Always 11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to DLC3)

Перейдите к шагу 3

OK

2.CHECK HARNESS AND CONNECTOR (ECM - DLC3)

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
G61-15 (SIL) - G48-7 (SIL) Always Below 1 Ω
G61-4 (TC) - G48-13 (TC) Always Below 1 Ω

Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
G61-15 (SIL) or G48-7 (SIL) - Body ground Always 10 kΩ or higher
G61-4 (TC) or G48-13 (TC) - Body ground Always 10 kΩ or higher

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ECM

3.CHECK DLC3

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
G48-4 (CG) - Body ground Always Below 1 Ω

Text in Illustration
*a	Front view of wire harness connector (to DLC3)

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - BATTERY)

Система Ecd - Mil Circuit

Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150 - СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MIL CONDITION

CHECK IF MIL TURNS OFF

CHECK HARNESS AND CONNECTOR (FOR SHORT)

CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER ASSEMBLY)

CHECK IF MIL ILLUMINATES

INSPECT COMBINATION METER ASSEMBLY (MIL CIRCUIT)

СИСТЕМА ECD - MIL Circuit

DESCRIPTION

The MIL is used to inform the user when the ECM has detected a vehicle malfunction.

By turning the ignition switch to ON, power is supplied to the MIL circuit and the ECM provides the circuit ground that illuminates the MIL.

Operation of the MIL should be checked visually: When the ignition switch is first turned to ON, the MIL should illuminate. When the engine is started, the MIL should turn off.

WIRING DIAGRAM

Система Ecd - Mil Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:

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

1.CHECK MIL CONDITION

Check the MIL condition.

Result:
Condition Proceed to
MIL remains on A
MIL does not illuminate B

Перейдите к шагу 5

A

2.CHECK IF MIL TURNS OFF

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON and turn the tester on.

Check if DTCs have been stored (See page ). If DTCs are stored, write them down.

Clear the DTCs using the intelligent tester (See page ).

Check that the MIL turns off.

OK:
The MIL turns off.

Перейдите к шагу 3

REPAIR CIRCUIT INDICATED BY OUTPUT DTC

3.CHECK HARNESS AND CONNECTOR (FOR SHORT)

Система Ecd - Mil Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

Disconnect the ECM connector.

Turn the ignition switch to ON.

Check that the MIL is not illuminated.

OK:
The MIL is not illuminated.

Text in Illustration
*a	Rear view of wire harness connector (to ECM)

Reconnect the ECM connector.

Перейдите к шагу 4

REPLACE ECM

4.CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER ASSEMBLY)

Disconnect the ECM connector.

Disconnect the combination meter assembly connector.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
G61-5 (W) - G7-7 (CHK) Always Below 1 Ω

Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
G61-5 (W) or G7-7 (CHK) - Body ground Always 10 kΩ or higher

Reconnect the ECM connector.

Reconnect the combination meter assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE COMBINATION METER ASSEMBLY

5.CHECK IF MIL ILLUMINATES

Check that the MIL illuminates when turning the ignition switch to ON.

OK:
The MIL illuminates.

Перейдите к шагу 6

NORMAL

6.INSPECT COMBINATION METER ASSEMBLY (MIL CIRCUIT)

Refer to the combination meter assembly troubleshooting procedures (See page ).

REPAIR OR REPLACE COMBINATION METER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER - ECM)

Система Ecd - Air Conditioning Cut Control Circuit

Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150 - СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

READ VALUE USING INTELLIGENT TESTER (CHECK OPERATION OF AIR CONDITIONING CUT CONTROL)

INSPECT ECM (ACT VOLTAGE)

CHECK HARNESS AND CONNECTOR (ECM - AIR CONDITIONING AMPLIFIER)

When not using intelligent tester:

CHECK ECM (ACT VOLTAGE)

CHECK HARNESS AND CONNECTOR (ECM - AIR CONDITIONING AMPLIFIER)

СИСТЕМА ECD - Air Conditioning Cut Control Circuit

DESCRIPTION

This circuit cuts air conditioning operation during vehicle acceleration in order to increase acceleration performance. During acceleration with the vehicle speed at 30 km/h (19 mph) or less and the accelerator pedal opening angle at 45° or more, the A/C magnetic switch is turned off for several seconds.

The air conditioning is also controlled using the engine coolant temperature output from the ECM to the A/C amplifier.

WIRING DIAGRAM

Система Ecd - Air Conditioning Cut Control Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

INSPECTION PROCEDURE

When using intelligent tester:

1.READ VALUE USING INTELLIGENT TESTER (CHECK OPERATION OF AIR CONDITIONING CUT CONTROL)

Connect the intelligent tester to the DLC3.

Start the engine and turn the air conditioning switch on.

УКАЗАНИЕ:

The A/C magnetic clutch is turned on.

Enter the following menus: Powertrain / Engine and ECT / Active Test / A/C Cut SIG.

Check operation of the A/C magnetic clutch cut when air conditioning cut control is operated by the intelligent tester.

OK:
A/C magnetic clutch is turned off.

Перейдите к шагу 2

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.INSPECT ECM (ACT VOLTAGE)

Система Ecd - Air Conditioning Cut Control Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

Start the engine.

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

Standard Voltage:
Tester Connection Condition Specified Condition
G62-8 (ACT) - Body ground Engine idling 11 to 14 V
G62-8 (ACT) - Body ground Ignition switch ON, engine stopped 0 to 3 V

Text in Illustration
*a	Component with harness connected (ECM)

Перейдите к шагу 3

REPLACE ECM

3.CHECK HARNESS AND CONNECTOR (ECM - AIR CONDITIONING AMPLIFIER)

Disconnect the A/C amplifier connector.

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
G25-27 (ACT) - G62-8 (ACT) Always Below 1 Ω

Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
G25-27 (ACT) or G62-8 (ACT) - Body ground Always 10 kΩ or higher

Reconnect the A/C amplifier connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE AIR CONDITIONING AMPLIFIER

When not using intelligent tester:

1.CHECK ECM (ACT VOLTAGE)

Start the engine.

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

Standard Voltage:
Tester Connection Condition Specified Condition
G62-8 (ACT) - Body ground Engine idling 11 to 14 V
G62-8 (ACT) - Body ground Ignition switch ON, engine stopped 0 to 3 V

Text in Illustration
*a	Component with harness connected (ECM)

Перейдите к шагу 2

REPLACE ECM

2.CHECK HARNESS AND CONNECTOR (ECM - AIR CONDITIONING AMPLIFIER)

Disconnect the A/C amplifier connector.

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
G25-27 (ACT) - G62-8 (ACT) Always Below 1 Ω

Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
G25-27 (ACT) or G62-8 (ACT) - Body ground Always 10 kΩ or higher

Reconnect the A/C amplifier connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE AIR CONDITIONING AMPLIFIER

Система Ecd - Air Conditioning Signal Circuit

Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150 - СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

READ VALUE USING INTELLIGENT TESTER (AIR CONDITIONING SIGNAL)

CHECK ECM (AC1 VOLTAGE)

CHECK HARNESS AND CONNECTOR (ECM - AIR CONDITIONING AMPLIFIER)

When not using intelligent tester:

CHECK ECM (AC1 VOLTAGE)

CHECK HARNESS AND CONNECTOR (ECM - AIR CONDITIONING AMPLIFIER)

СИСТЕМА ECD - Air Conditioning Signal Circuit

DESCRIPTION

When the A/C compressor is on, the A/C amplifier sends the A/C signal to the ECM and the ECM increases the fuel injection volume to improve driveability during engine idling.

WIRING DIAGRAM

Система Ecd - Air Conditioning Signal Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

INSPECTION PROCEDURE

When using intelligent tester:

1.READ VALUE USING INTELLIGENT TESTER (AIR CONDITIONING SIGNAL)

Connect the intelligent tester to the DLC3.

Start the engine.

Turn the A/C switch on.

Enter the following menus: Powertrain / Engine and ECT / Data List / A/C SIG.

Result:
Switch Condition A/C SIG
A/C switch off OFF
A/C switch on ON

Перейдите к шагу 2

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.CHECK ECM (AC1 VOLTAGE)

Система Ecd - Air Conditioning Signal Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

Start the engine.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
G62-2 (AC1) - Body ground A/C switch on Below 1.5 V
G62-2 (AC1) - Body ground A/C switch off 7.5 to 14 V

Text in Illustration
*a	Component with harness connected (ECM)

Перейдите к шагу 3

REPLACE ECM

3.CHECK HARNESS AND CONNECTOR (ECM - AIR CONDITIONING AMPLIFIER)

Disconnect the A/C amplifier connector.

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
G25-17 (AC1) - G62-2 (AC1) Always Below 1 Ω

Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
G25-17 (AC1) or G62-2 (AC1) - Body ground Always 10 kΩ or higher

Reconnect the A/C amplifier connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE AIR CONDITIONING AMPLIFIER

When not using intelligent tester:

1.CHECK ECM (AC1 VOLTAGE)

Start the engine.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
G62-2 (AC1) - Body ground A/C switch on Below 1.5 V
G62-2 (AC1) - Body ground A/C switch off 7.5 to 14 V

Text in Illustration
*a	Component with harness connected (ECM)

Перейдите к шагу 2

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.CHECK HARNESS AND CONNECTOR (ECM - AIR CONDITIONING AMPLIFIER)

Disconnect the A/C amplifier connector.

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
G25-17 (AC1) - G62-2 (AC1) Always Below 1 Ω

Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
G25-17 (AC1) or G62-2 (AC1) - Body ground Always 10 kΩ or higher

Reconnect the A/C amplifier connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE AIR CONDITIONING AMPLIFIER

Система Ecd - Starter Signal Circuit

Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150 - СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

READ VALUE USING INTELLIGENT TESTER (STA SIGNAL)

CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM)

When not using intelligent tester:

CHECK ECM (STA VOLTAGE)

CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM)

СИСТЕМА ECD - Starter Signal Circuit

DESCRIPTION

When the engine is cranked, the intake air flow becomes slow so fuel vaporization is poor. A rich mixture is therefore necessary in order to achieve good startability. While the engine is being cranked, the battery voltage is applied to terminal STA of the ECM. The starter signal is mainly used to increase the fuel injection volume for starting and after-start injection control.

WIRING DIAGRAM

Система Ecd - Starter Signal Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

INSPECTION PROCEDURE

When using intelligent tester:

1.READ VALUE USING INTELLIGENT TESTER (STA SIGNAL)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON and turn the tester on.

Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.

Read the STA signal on the intelligent tester while the starter operates.

OK:
Ignition Switch Position STA Signal
LOCK, ACC, ON OFF
START ON

Перейдите к шагу 2

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM)

Disconnect the clutch start switch connector.

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):
for LHD
Tester Connection Condition Specified Condition
A41-1 - G61-11 (STA) Always Below 1 Ω
for RHD
Tester Connection Condition Specified Condition
r2-1 - G61-11 (STA) Always Below 1 Ω

Standard Resistance (Check for Short):
for LHD
Tester Connection Condition Specified Condition
A41-1 or G61-11 (STA) - Body ground Always 10 kΩ higher
for RHD
Tester Connection Condition Specified Condition
r2-1 or G61-11 (STA) - Body ground Always 10 kΩ higher

Reconnect the clutch start switch connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ECM

When not using intelligent tester:

1.CHECK ECM (STA VOLTAGE)

Система Ecd - Starter Signal Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

Turn the ignition switch to ON.

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

Standard Voltage:
Tester Connection Condition Specified Condition
G61-11 (STA) - C101-14 (E1) Cranking 6 V or higher

Text in Illustration
*a	Component with harness connected (ECM)

Перейдите к шагу 2

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM)

Disconnect the clutch start switch connector.

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):
for LHD
Tester Connection Condition Specified Condition
A41-1 - G61-11 (STA) Always Below 1 Ω
for RHD
Tester Connection Condition Specified Condition
r2-1 - G61-11 (STA) Always Below 1 Ω

Standard Resistance (Check for Short):
for LHD
Tester Connection Condition Specified Condition
A41-1 or G61-11 (STA) - Body ground Always 10 kΩ higher
for RHD
Tester Connection Condition Specified Condition
r2-1 or G61-11 (STA) - Body ground Always 10 kΩ higher

Reconnect the clutch start switch connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ECM

Система Ecd - Ecm Power Source Circuit

Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150 - СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ECM (+B VOLTAGE)

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

CHECK ECM (IGSW VOLTAGE)

CHECK ECM (MREL VOLTAGE)

CHECK NO. 1 INTEGRATION RELAY (EFI)

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY (EFI) - ECM AND BODY GROUND)

INSPECT IGNITION SWITCH ASSEMBLY

СИСТЕМА ECD - ECM Power Source Circuit

DESCRIPTION

When the ignition switch is turned to ON, the battery voltage is applied to terminal IGSW of the ECM. The ECM "MREL" output signal causes current to flow to the EFI relay coil, closing the contacts of the EFI relay and supplying power to terminal +B of the ECM.

WIRING DIAGRAM

Система Ecd - Ecm Power Source Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:

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

1.CHECK ECM (+B VOLTAGE)

Система Ecd - Ecm Power Source Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

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
G61-12 (+B) - C101-14 (E1) Ignition switch ON 11 to 14 V

Text in Illustration
*a	Component with harness connected (ECM)

Перейдите к шагу 2

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
C101-14 (E1) - Body ground Always Below 1 Ω

Text in Illustration
*a	Rear view of wire harness connector (to ECM)

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.CHECK ECM (IGSW VOLTAGE)

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
G61-14 (IGSW) - C101-14 (E1) Ignition switch ON 11 to 14 V

Text in Illustration
*a	Component with harness connected (ECM)

Перейдите к шагу 7

OK

4.CHECK ECM (MREL VOLTAGE)

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
G61-3 (MREL) - C101-14 (E1) Ignition switch ON 11 to 14 V

Text in Illustration
*a	Component with harness connected (ECM)

REPLACE ECM

OK

5.CHECK NO. 1 INTEGRATION RELAY (EFI)

Turn the ignition switch to ON.

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

Standard Voltage:
Tester Connection Condition Specified Condition
1B-4 - Body ground Ignition switch ON 10 to 14 V

Text in Illustration
*a	Rear view of wire harness connector (to No. 1 Integration Relay)

Reconnect the No. 1 integration relay (EFI) connector.

REPLACE NO. 1 INTEGRATION RELAY (EFI)

OK

6.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY (EFI) - ECM AND BODY GROUND)

Disconnect the No. 1 integration relay (EFI) connector from the engine room junction block.

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
1B-2 - G61-3 (MREL) Always Below 1 Ω
1B-4 - G61-12 (+B) Always Below 1 Ω
1B-3 - Body ground Always Below 1 Ω

Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
1B-2 or G61-3 (MREL) - Body ground Always 10 kΩ or higher
1B-4 or G61-12 (+B) - Body ground Always 10 kΩ or higher

Reconnect the No. 1 integration relay (EFI) connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPAIR OR REPLACE HARNESS OR CONNECTOR (TERMINAL +B OF ECM - BATTERY)

7.INSPECT IGNITION SWITCH ASSEMBLY

Inspect the ignition switch assembly (See page ).

REPLACE IGNITION SWITCH ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM)

Система Ecd - Pre-Heating Control Circuit

Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150 - СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK GLOW INDICATOR LIGHT

CHECK GLOW PLUG ASSEMBLY (INSTALLATION)

INSPECT GLOW PLUG ASSEMBLY (RESISTANCE)

CHECK INDICATOR LIGHTING TIME AND AFTER GLOW TIME

READ OUTPUT DTC

INSPECT GLOW RELAY ASSEMBLY

CHECK ECM (SREL VOLTAGE)

CHECK HARNESS AND CONNECTOR (GLOW RELAY - ECM AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (GLOW PLUG RELAY (GLOW) - GLOW PLUG ASSEMBLY AND BATTERY)

CHECK ECM (GIND VOLTAGE)

CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER ASSEMBLY)

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY)

СИСТЕМА ECD - Pre-heating Control Circuit

DESCRIPTION

When the ignition switch is turned to ON, the ECM calculates the glow indicator lighting time/heating corresponding to the coolant temperature at that time and turns on the glow indicator light/glow plug relay (GLOW).

As ceramic is used for glow plug assembly material, current control is not performed.

Система Ecd - Pre-Heating Control Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

WIRING DIAGRAM

Система Ecd - Pre-Heating Control Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:

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

1.CHECK GLOW INDICATOR LIGHT

Turn the ignition switch to ON.

Check that the glow indicator light comes on.

OK:
The glow indicator light remains on for 0.5 seconds or more, and then goes off.

Перейдите к шагу 10

OK

2.CHECK GLOW PLUG ASSEMBLY (INSTALLATION)

Check that the glow plug assembly and glow plug wire are securely installed.

OK:
The glow plug assembly and glow plug wire are securely installed.

TIGHTEN GLOW PLUG ASSEMBLY

OK

3.INSPECT GLOW PLUG ASSEMBLY (RESISTANCE)

Inspect the glow plug assembly (See page ).

REPLACE GLOW PLUG ASSEMBLY

OK

4.CHECK INDICATOR LIGHTING TIME AND AFTER GLOW TIME

REPLACE ECM

OK

5.READ OUTPUT DTC

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON and turn the tester on.

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

Read the DTCs (See page ).

Result
Result	Proceed to
DTC is not output	A
DTC is output	B

GO TO RELEVANT DTC CHART

A

6.INSPECT GLOW RELAY ASSEMBLY

Inspect the glow plug relay (GLOW) (See page ).

REPLACE GLOW PLUG RELAY (GLOW)

OK

7.CHECK ECM (SREL VOLTAGE)

Система Ecd - Pre-Heating Control Circuit. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

Turn the ignition switch to the start position.

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

Standard Voltage:
Tester Connection Condition Specified Condition
G61-2 (SREL) - C101-14 (E1) Cranking 11 to 14 V

Text in Illustration
*a	Component with harness connected (ECM)

REPLACE ECM

OK

8.CHECK HARNESS AND CONNECTOR (GLOW RELAY - ECM AND BODY GROUND)

Disconnect the ECM connector.

Remove the glow relay from the engine room relay block.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
G61-2 (SREL) - Relay block glow relay terminal 2 Always Below 1 Ω
Relay block glow relay terminal 1 - Body ground Always Below 1 Ω

Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
G61-2 (SREL) or relay block glow relay terminal 2 - Body ground Always 10 kΩ or higher

Reconnect the ECM connector.

Reinstall the glow relay.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.CHECK HARNESS AND CONNECTOR (GLOW PLUG RELAY (GLOW) - GLOW PLUG ASSEMBLY AND BATTERY)

Disconnect the cable from the negative (-) battery terminal.

Disconnect the cable from the positive (+) battery terminal.

Remove the glow relay from the engine room relay block.

Disconnect the glow plug wire.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
Relay block glow relay terminal 3 - C114-1 Always Below 1 Ω
Relay block glow relay terminal 5 - Positive (+) battery terminal Always Below 1 Ω

ПРИМЕЧАНИЕ:

After reconnecting the battery cable, the radio and clock need to be adjusted as they were previously.

Reinstall the glow relay.

Reconnect the glow plug wire.

Reconnect the cable to the positive (+) battery terminal.

Reconnect the cable to the negative (-) battery terminal.

REPAIR OR REPLACE HARNESS OR CONNECTOR

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

10.CHECK ECM (GIND VOLTAGE)

Disconnect the ECM 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
G62-1 (GIND) - C101-14 (E1) Ignition switch ON 11 to 14 V

Text in Illustration
*a	Rear view of wire harness connector (to ECM)

Reconnect the ECM connector.

Перейдите к шагу 11

REPLACE ECM

11.CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER ASSEMBLY)

Disconnect the combination meter assembly connector.

Disconnect the ECM connector.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G7-8 - G62-1 (GIND) Always Below 1 Ω

Reconnect the combination meter assembly connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

12.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY)

Disconnect the combination meter assembly 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
G6-28 - Body ground Ignition switch ON 11 to 14 V

Text in Illustration
*a	Front view of wire harness connector (to Combination Meter Assembly)

Reconnect the combination meter assembly connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE COMBINATION METER ASSEMBLY

Dtc 19 (2) Accelerator Position Sensor Range / Performance Problem

Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150 - СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

READ VALUE USING INTELLIGENT TESTER (ACCELERATOR POSITION)

CHECK HARNESS AND CONNECTOR (ECM - ACCELERATOR PEDAL POSITION SENSOR)

When not using intelligent tester:

CHECK ECM (VPA, VPA2 VOLTAGE)

CHECK HARNESS AND CONNECTOR (ECM - ACCELERATOR PEDAL POSITION SENSOR)

DTC 19 (2) Accelerator Position Sensor Range / Performance Problem

DESCRIPTION

Refer to DTC 19 (1) (See page ).

DTC No.	DTC Detection Condition	Trouble Area
19 (2)	Either of the ECM sensors has completed learning, and the voltage difference of the No. 1 and No. 2 sensors is more than 1.2 V or less than 0.4 V.	Open or short in accelerator pedal position sensor circuit Accelerator pedal position sensor ECM
19 (2)	One of the following continues for more than 2.0 seconds. The voltage difference of the No. 1 and No. 2 sensors is not within the specified range. VPA2 is 4.9 V or higher. Accelerator idling specified voltages of No. 1 and No. 2 are below 0.04 V.

УКАЗАНИЕ:

After confirming DTC 19 (2), use the intelligent tester to confirm the throttle valve opening percentage.

Trouble Area	Accelerator pedal position expressed as voltage
	Accelerator pedal released	Accelerator pedal depressed
	ACCEL POS #1	ACCEL POS #2	ACCEL POS #1	ACCEL POS #2
VC circuit open	0 to 0.2 V	0 to 0.2 V	0 to 0.2 V	0 to 0.2 V
VPA circuit open or shorted to ground	0 to 0.2 V	1.2 to 2.0 V	0 to 0.2 V	3.4 to 5.3 V
VPA2 circuit open or shorted to ground	0.5 to 1.1 V	0 to 0.2 V	2.6 to 4.5 V	0 to 0.2 V
E2 circuit open	4.5 to 5.5 V	4.5 to 5.5 V	4.5 to 5.5 V	4.5 to 5.5 V

WIRING DIAGRAM

Refer to DTC 19 (1) (See page ).

INSPECTION PROCEDURE

УКАЗАНИЕ:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

When using intelligent tester:

1.READ VALUE USING INTELLIGENT TESTER (ACCELERATOR POSITION)

Dtc 19 (2) Accelerator Position Sensor Range / Performance Problem. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Enter the following menus: Powertrain / Engine and ECT / Data List / Accel Position.

Check that the value displayed on the intelligent tester changes when repeatedly depressing and releasing the accelerator pedal.

OK:
Value changes.

Text in Illustration
*a	Depressed
*b	Released

Перейдите к шагу 2

REPLACE ECM

2.CHECK HARNESS AND CONNECTOR (ECM - ACCELERATOR PEDAL POSITION SENSOR)

Disconnect the accelerator pedal position sensor connector.

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
A19-1 (VCP2) - C102-1 (VC)	Always	Below 1 Ω
A19-2 (EPA2) - C102-9 (E2)	Always	Below 1 Ω
A19-3 (VPA2) - G62-12 (VPA2)	Always	Below 1 Ω
A19-4 (VCPA) - G62-6 (VCPA)	Always	Below 1 Ω
A19-5 (EPA) - G62-4 (EPA)	Always	Below 1 Ω
A19-6 (VPA) - G62-5 (VPA)	Always	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
A19-1 (VCP2) or C102-1 (VC) - Body ground	Always	10 kΩ or higher
A19-2 (EPA2) or C102-9 (E2) - Body ground	Always	10 kΩ or higher
A19-3 (VPA2) or G62-12 (VPA2) - Body ground	Always	10 kΩ or higher
A19-4 (VCPA) or G62-6 (VCPA) - Body ground	Always	10 kΩ or higher
A19-5 (EPA) or G62-4 (EPA) - Body ground	Always	10 kΩ or higher
A19-6 (VPA) or G62-5 (VPA) - Body ground	Always	10 kΩ or higher

Reconnect the accelerator pedal position sensor connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ACCELERATOR PEDAL ROD ASSEMBLY

When not using intelligent tester:

1.CHECK ECM (VPA, VPA2 VOLTAGE)

Turn the ignition switch to ON.

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

Standard Voltage:
Accelerator Pedal Released
Tester Connection Switch Condition Specified Condition
G62-5 (VPA) - G62-4 (EPA) Ignition switch ON 0.5 to 1.1 V
G62-12 (VPA2) - C102-9 (E2) Ignition switch ON 1.2 to 2.0 V
Accelerator Pedal Depressed
Tester Connection Switch Condition Specified Condition
G62-5 (VPA) - G62-4 (EPA) Ignition switch ON 2.6 to 4.5 V
G62-12 (VPA2) - C102-9 (E2) Ignition switch ON 3.4 to 5.3 V

Text in Illustration
*a	Component with harness connected (ECM)

Перейдите к шагу 2

REPLACE ECM

2.CHECK HARNESS AND CONNECTOR (ECM - ACCELERATOR PEDAL POSITION SENSOR)

Disconnect the accelerator pedal position sensor connector.

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
A19-1 (VCP2) - C102-1 (VC)	Always	Below 1 Ω
A19-2 (EPA2) - C102-9 (E2)	Always	Below 1 Ω
A19-3 (VPA2) - G62-12 (VPA2)	Always	Below 1 Ω
A19-4 (VCPA) - G62-6 (VCPA)	Always	Below 1 Ω
A19-5 (EPA) - G62-4 (EPA)	Always	Below 1 Ω
A19-6 (VPA) - G62-5 (VPA)	Always	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
A19-1 (VCP2) or C102-1 (VC) - Body ground	Always	10 kΩ or higher
A19-2 (EPA2) or C102-9 (E2) - Body ground	Always	10 kΩ or higher
A19-3 (VPA2) or G62-12 (VPA2) - Body ground	Always	10 kΩ or higher
A19-4 (VCPA) or G62-6 (VCPA) - Body ground	Always	10 kΩ or higher
A19-5 (EPA) or G62-4 (EPA) - Body ground	Always	10 kΩ or higher
A19-6 (VPA) or G62-5 (VPA) - Body ground	Always	10 kΩ or higher

Reconnect the accelerator pedal position sensor connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ACCELERATOR PEDAL ROD ASSEMBLY

Dtc 51 Stop Light Switch Circuit Malfunction

Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150 - СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)

CHECK ECM (STP, ST1- VOLTAGE)

INSPECT STOP LIGHT SWITCH

CHECK HARNESS AND CONNECTOR (ECM - STOP LIGHT SWITCH)

When not using intelligent tester:

CHECK STOP LIGHT (OPERATION)

CHECK ECM (STP, ST1- VOLTAGE)

INSPECT STOP LIGHT SWITCH

CHECK HARNESS AND CONNECTOR (ECM - STOP LIGHT SWITCH)

DTC 51 Stop Light Switch Circuit Malfunction

DESCRIPTION

In this system, the signal of the stop light switch is used to judge whether the stop light system is abnormal or not.

The stop light switch has a duplex system (signals STP and ST1-) to recognize the abnormality when the signals of depressing and releasing the brake pedal are detected simultaneously.

УКАЗАНИЕ:

The normal condition is shown in the table below.

Signal	Brake Pedal Released	In Transition	Brake Pedal Depressed
STP	Off	On	On
ST1-	On	On	Off

DTC No.	DTC Detection Condition	Trouble Area
51	Conditions (a), (b) and (c) continue for 0.5 seconds or more(1 trip detection logic): (a) Ignition switch is ON. (b) Brake pedal is released. (c) STP signal is off when ST1- signal is off.	Open or short in stop light switch signal circuit Stop light switch ECM

WIRING DIAGRAM

Dtc 51 Stop Light Switch Circuit Malfunction. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:

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

УКАЗАНИЕ:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

When using intelligent tester:

1.READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Enter the following menus: Powertrain / Engine and ECT / Data List / Stop Light SW.

OK:
Brake Pedal Display
Depressed Stop Light SW ON
Released Stop Light SW OFF

Перейдите к шагу 2

CHECK FOR INTERMITTENT PROBLEMS

2.CHECK ECM (STP, ST1- VOLTAGE)

Dtc 51 Stop Light Switch Circuit Malfunction. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

Turn the ignition switch to ON.

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

Standard Voltage:
Tester Connection Brake Pedal Condition Specified Condition
G61-19 (STP) - C101-14 (E1) Depressed 11 to 14 V
Released Below 1.5 V
G62-11 (ST1-) - C101-14 (E1) Depressed Below 1.5 V
Released 11 to 14 V

Text in Illustration
*a	Brake pedal depressed
*b	Brake pedal released
*c	Component with harness connected (ECM)

Перейдите к шагу 3

REPLACE ECM

3.INSPECT STOP LIGHT SWITCH

Inspect the stop light switch (See page ).

REPLACE STOP LIGHT SWITCH

OK

4.CHECK HARNESS AND CONNECTOR (ECM - STOP LIGHT SWITCH)

Disconnect the stop light switch connector.

Disconnect the ECM connectors.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
A5-1 - G61-19 (STP) Always Below 1 Ω
A5-3 - G62-11 (ST1-) Always Below 1 Ω

Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
A5-1 or G61-19 (STP) - Body ground Always 10 kΩ or higher
A5-3 or G62-11 (ST1-) - Body ground Always 10 kΩ or higher

Reconnect the stop light switch connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPAIR OR REPLACE POWER SOURCE CIRCUIT

When not using intelligent tester:

1.CHECK STOP LIGHT (OPERATION)

Check if the stop lights go on and off normally when the brake pedal is depressed and released.

OK:
The stop lights go on and off normally.

REPAIR STOP LIGHT SWITCH CIRCUIT

OK

2.CHECK ECM (STP, ST1- VOLTAGE)

Turn the ignition switch to ON.

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

Standard Voltage:
Tester Connection Brake Pedal Condition Specified Condition
G61-19 (STP) - C101-14 (E1) Depressed 11 to 14 V
Released Below 1.5 V
G62-11 (ST1-) - C101-14 (E1) Depressed Below 1.5 V
Released 11 to 14 V

Text in Illustration
*a	Brake pedal depressed
*b	Brake pedal released
*c	Component with harness connected (ECM)

Перейдите к шагу 3

REPLACE ECM

3.INSPECT STOP LIGHT SWITCH

Inspect the stop light switch (See page ).

REPLACE STOP LIGHT SWITCH

OK

4.CHECK HARNESS AND CONNECTOR (ECM - STOP LIGHT SWITCH)

Disconnect the stop light switch connector.

Disconnect the ECM connectors.

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

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
A5-1 - G61-19 (STP) Always Below 1 Ω
A5-3 - G62-11 (ST1-) Always Below 1 Ω

Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition
A5-1 or G61-19 (STP) - Body ground Always 10 kΩ or higher
A5-3 or G62-11 (ST1-) - Body ground Always 10 kΩ or higher

Reconnect the stop light switch connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPAIR OR REPLACE POWER SOURCE CIRCUIT

Dtc 19 (1) Accelerator Position Sensor Circuit Malfunction

Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150 - СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

READ VALUE USING INTELLIGENT TESTER (ACCELERATOR POSITION)

READ OUTPUT DTC (CHECK IF ACCELERATOR PEDAL POSITION SENSOR DTC IS OUTPUT AGAIN)

CHECK HARNESS AND CONNECTOR (ECM - ACCELERATOR PEDAL POSITION SENSOR)

CHECK ECM (VC, VCPA VOLTAGE)

REPLACE ACCELERATOR PEDAL ROD ASSEMBLY

READ OUTPUT DTC (CHECK IF ACCELERATOR PEDAL POSITION SENSOR DTC IS OUTPUT AGAIN)

When not using intelligent tester:

CHECK HARNESS AND CONNECTOR (ECM - ACCELERATOR PEDAL POSITION SENSOR)

CHECK ECM (VC, VCPA VOLTAGE)

REPLACE ACCELERATOR PEDAL ROD ASSEMBLY

READ OUTPUT DTC (CHECK IF ACCELERATOR PEDAL POSITION SENSOR DTC IS OUTPUT AGAIN)

DTC 19 (1) Accelerator Position Sensor Circuit Malfunction

DESCRIPTION

УКАЗАНИЕ:

This is a troubleshooting procedure for the accelerator pedal position sensor.

This electrical throttle system does not use a throttle cable.

This accelerator pedal position sensor is a non-contact type.

The accelerator pedal position sensor is mounted on the accelerator pedal to detect the position of the accelerator pedal. Since this sensor is electronically controlled with hall elements, accurate control and reliability can be obtained. It has 2 sensors in order to detect the accelerator position and malfunctions of the accelerator position sensor.

Due to the accelerator pedal position sensor, the voltage applied to terminals VPA and VPA2 of the ECM changes between 0 V and 5 V according to the position of the accelerator pedal. VPA is a signal which indicates the actual accelerator pedal position and is used for engine control, and VPA2 is a signal which indicates information about the position and is used for detecting malfunctions. Based on the signals input to terminals VPA and VPA2, the ECM determines the current position of the accelerator pedal and controls the injection pump.

Dtc 19 (1) Accelerator Position Sensor Circuit Malfunction. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

DTC No.	DTC Detection Condition	Trouble Area
19 (1)	Condition (a), (b), (c) or (d) continues for 2.0 seconds: (a) VPA is 0.2 V or less and VPA2 is 0.5 V or less. (b) VPA is 4.8 V or higher. (c) VPA is 0.2 V or higher and 3.45 V or less, and VPA2 is 4.8 V or higher. (d) "VPA minus VPA2" is 0.02 V or less.	Open or short in accelerator pedal position sensor circuit Accelerator pedal position sensor ECM
19 (1)	Condition (a) continues for 0.5 seconds: (a) VPA is 0.2 V or less, or VPA2 is 0.5 V or less.

УКАЗАНИЕ:

After confirming DTC 19 (1), use the intelligent tester to confirm the throttle valve opening amount.

Trouble Area	Accelerator Pedal Position Expressed as Voltage
	Accelerator pedal released	Accelerator pedal depressed
	ACCEL POS #1	ACCEL POS #2	ACCEL POS #1	ACCEL POS #2
VC circuit open	0 to 0.2 V	0 to 0.2 V	0 to 0.2 V	0 to 0.2 V
VPA circuit open or shorted to ground	0 to 0.2 V	1.2 to 2.0 V	0 to 0.2 V	3.4 to 5.3 V
VPA2 circuit open or shorted to ground	0.5 to 1.1 V	0 to 0.2 V	2.6 to 4.5 V	0 to 0.2 V
E2 circuit open	4.5 to 5.5 V	4.5 to 5.5 V	4.5 to 5.5 V	4.5 to 5.5 V

WIRING DIAGRAM

Dtc 19 (1) Accelerator Position Sensor Circuit Malfunction. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

INSPECTION PROCEDURE

УКАЗАНИЕ:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

When using intelligent tester:

1.READ VALUE USING INTELLIGENT TESTER (ACCELERATOR POSITION)

Dtc 19 (1) Accelerator Position Sensor Circuit Malfunction. СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ 5L-E. Land Cruiser Prado GRJ150 TRJ150 TRJ155 KDJ150 TRJ155 LJ150

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Enter the following menus: Powertrain / Engine and ECT / Data List / Accel Position.

Check that the value displayed on the intelligent tester changes when repeatedly depressing and releasing the accelerator pedal.

OK:
Value changes.

Text in Illustration
*a	Depressed
*b	Released

Перейдите к шагу 3

OK

2.READ OUTPUT DTC (CHECK IF ACCELERATOR PEDAL POSITION SENSOR DTC IS OUTPUT AGAIN)

Connect the intelligent tester to the DLC3.

Clear the DTC (See page ).

Turn the ignition switch off for 30 seconds or more.

Start the engine and idle it for 15 seconds or more.

Read the DTCs (See page ).

Result
Result	Proceed to
DTC 19 (1) output again	A
No DTC output	B

SYSTEM OK

REPLACE ECM

3.CHECK HARNESS AND CONNECTOR (ECM - ACCELERATOR PEDAL POSITION SENSOR)

Disconnect the accelerator pedal position sensor connector.

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
A19-1 (VCP2) - C102-1 (VC)	Always	Below 1 Ω
A19-2 (EPA2) - C102-9 (E2)	Always	Below 1 Ω
A19-3 (VPA2) - G62-12 (VPA2)	Always	Below 1 Ω
A19-4 (VCPA) - G62-6 (VCPA)	Always	Below 1 Ω
A19-5 (EPA) - G62-4 (EPA)	Always	Below 1 Ω
A19-6 (VPA) - G62-5 (VPA)	Always	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
A19-1 (VCP2) or C102-1 (VC) - Body ground	Always	10 kΩ or higher
A19-2 (EPA2) or C102-9 (E2) - Body ground	Always	10 kΩ or higher
A19-3 (VPA2) or G62-12 (VPA2) - Body ground	Always	10 kΩ or higher
A19-4 (VCPA) or G62-6 (VCPA) - Body ground	Always	10 kΩ or higher
A19-5 (EPA) or G62-4 (EPA) - Body ground	Always	10 kΩ or higher
A19-6 (VPA) or G62-5 (VPA) - Body ground	Always	10 kΩ or higher

Reconnect the accelerator pedal position sensor connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.CHECK ECM (VC, VCPA VOLTAGE)

Disconnect the accelerator pedal position sensor connector.

Turn the ignition switch to ON.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
C102-1 (VC) - C102-9 (E2) Ignition switch ON 4.5 to 5.5 V
G62-6 (VCPA) - G62-4 (EPA) Ignition switch ON 4.5 to 5.5 V

Text in Illustration
*1	Accelerator pedal position sensor connector
*a	Component with harness connected (ECM)

Reconnect the accelerator pedal position sensor connector.

REPLACE ECM

OK

5.REPLACE ACCELERATOR PEDAL ROD ASSEMBLY

Replace the accelerator pedal rod assembly (See page ).

NEXT

6.READ OUTPUT DTC (CHECK IF ACCELERATOR PEDAL POSITION SENSOR DTC IS OUTPUT AGAIN)

Connect the intelligent tester to the DLC3.

Clear the DTC (See page ).

Turn the ignition switch off for 30 seconds or more.

Start the engine and idle it for 15 seconds or more.

Read the DTCs (See page ).

Result
Result	Proceed to
DTC 19 (1) output again	A
No DTC output	B

SYSTEM OK

REPLACE ECM

When not using intelligent tester:

1.CHECK HARNESS AND CONNECTOR (ECM - ACCELERATOR PEDAL POSITION SENSOR)

Disconnect the accelerator pedal position sensor connector.

Disconnect the ECM connector.

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

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
A19-1 (VCP2) - C102-1 (VC)	Always	Below 1 Ω
A19-2 (EPA2) - C102-9 (E2)	Always	Below 1 Ω
A19-3 (VPA2) - G62-12 (VPA2)	Always	Below 1 Ω
A19-4 (VCPA) - G62-6 (VCPA)	Always	Below 1 Ω
A19-5 (EPA) - G62-4 (EPA)	Always	Below 1 Ω
A19-6 (VPA) - G62-5 (VPA)	Always	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
A19-1 (VCP2) or C102-1 (VC) - Body ground	Always	10 kΩ or higher
A19-2 (EPA2) or C102-9 (E2) - Body ground	Always	10 kΩ or higher
A19-3 (VPA2) or G62-12 (VPA2) - Body ground	Always	10 kΩ or higher
A19-4 (VCPA) or G62-6 (VCPA) - Body ground	Always	10 kΩ or higher
A19-5 (EPA) or G62-4 (EPA) - Body ground	Always	10 kΩ or higher
A19-6 (VPA) or G62-5 (VPA) - Body ground	Always	10 kΩ or higher

Reconnect the accelerator pedal position sensor connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.CHECK ECM (VC, VCPA VOLTAGE)

Disconnect the accelerator pedal position sensor connector.

Turn the ignition switch to ON.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
C102-1 (VC) - C102-9 (E2) Ignition switch ON 4.5 to 5.5 V
G62-6 (VCPA) - G62-4 (EPA) Ignition switch ON 4.5 to 5.5 V

Text in Illustration
*1	Accelerator pedal position sensor connector
*a	Component with harness connected (ECM)

Reconnect the accelerator pedal position sensor connector.

REPLACE ECM

OK

3.REPLACE ACCELERATOR PEDAL ROD ASSEMBLY

Replace the accelerator pedal rod assembly (See page ).

NEXT

4.READ OUTPUT DTC (CHECK IF ACCELERATOR PEDAL POSITION SENSOR DTC IS OUTPUT AGAIN)

Connect the intelligent tester to the DLC3.

Clear the DTC (See page ).

Turn the ignition switch off for 30 seconds or more.

Start the engine and idle it for 15 seconds or more.

Read the DTCs (See page ).

Result
Result	Proceed to
DTC 19 (1) output again	A
No DTC output	B

SYSTEM OK

REPLACE ECM

Tester Connection	Switch Condition	Specified Condition
G62-2 (AC1) - Body ground	A/C switch on	Below 1.5 V
G62-2 (AC1) - Body ground	A/C switch off	7.5 to 14 V

Brake Pedal	Display
Depressed	Stop Light SW ON
Released	Stop Light SW OFF

Tester Connection	Brake Pedal Condition	Specified Condition
G61-19 (STP) - C101-14 (E1)	Depressed	11 to 14 V
G61-19 (STP) - C101-14 (E1)	Released	Below 1.5 V
G62-11 (ST1-) - C101-14 (E1)	Depressed	Below 1.5 V
G62-11 (ST1-) - C101-14 (E1)	Released	11 to 14 V