Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1VD-FTV ENGINE CONTROL

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT INTEGRATION RELAY (INTEGRATION RELAY - BODY GROUND)

INSPECT INTEGRATION RELAY (EFI RELAY AND IG2 RELAY)

CHECK HARNESS AND CONNECTOR (+B AND MREL CIRCUIT)

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

INSPECT ECM (IGSW VOLTAGE)

INSPECT FUSE (IGN)

CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - ECM, INTEGRATION RELAY - BODY GROUND)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ENGINE ROOM RELAY BLOCK)

CHECK ENTRY AND START SYSTEM (POWER SOURCE MODE DOES NOT CHANGE)

ECD SYSTEM (w/ DPF) - ECM Power Source Circuit

DESCRIPTION

When the engine switch is turned on (IG), the battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of the ECM causes current to flow to the coil, closing the contacts of the integration relay (EFI relay) and supplying power to terminal +B of the ECM.

WIRING DIAGRAM

Ecd System (W/ Dpf) - Ecm Power Source Circuit. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

NOTICE:

After replacing the ECM, the new ECM needs registration () and initialization ().

1.INSPECT INTEGRATION RELAY (INTEGRATION RELAY - BODY GROUND)

Ecd System (W/ Dpf) - Ecm Power Source Circuit. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Remove the integration relay from the engine room relay block.

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

Standard Voltage:
Tester Connection Condition Specified Condition
1C-1 - Body ground Always 11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.INSPECT INTEGRATION RELAY (EFI RELAY AND IG2 RELAY)

Remove the integration relay from the engine room relay block.

Inspect the EFI MAIN fuse and the IG2 MAIN fuse.

Remove the EFI MAIN fuse and IG2 MAIN fuse from the integration relay.

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

Standard Resistance:
Tester Connection Condition Specified Condition
EFI MAIN fuse Always Below 1 Ω
IG2 MAIN fuse Always Below 1 Ω

Inspect the EFI relay and the IG2 relay.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1C-1 - 1B-4	Battery voltage not applied to terminals 1B-2 and 1B-3	10 kΩ or higher
1C-1 - 1B-4	Battery voltage applied to terminals 1B-2 and 1B-3	Below 1 Ω
1C-1 - 1B-8	Battery voltage not applied to terminals 1B-7 and 1B-6	10 kΩ or higher
1C-1 - 1B-8	Battery voltage applied to terminals 1B-7 and 1B-6	Below 1 Ω

REPLACE INTEGRATION RELAY

OK

3.CHECK HARNESS AND CONNECTOR (+B AND MREL CIRCUIT)

Check the harness and the connectors between the integration relay and the ECM.

Remove the integration relay from the engine room relay block.

Disconnect the ECM connector.

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

Standard Resistance:

for LHD
Tester Connection	Condition	Specified Condition
A38-44 (MREL) - 1B-2	Always	Below 1 Ω
A38-2 (+B) - 1B-4	Always	Below 1 Ω
A38-1 (+B2) - 1B-4	Always	Below 1 Ω
A38-44 (MREL) or 1B-2 - Body ground	Always	10 kΩ or higher
A38-2 (+B) or 1B-4 - Body ground	Always	10 kΩ or higher
A38-1 (+B2) or 1B-4 - Body ground	Always	10 kΩ or higher

for RHD
Tester Connection	Condition	Specified Condition
A52-44 (MREL) - 1B-2	Always	Below 1 Ω
A52-2 (+B) - 1B-4	Always	Below 1 Ω
A52-1 (+B2) - 1B-4	Always	Below 1 Ω
A52-44 (MREL) or 1B-2 - Body ground	Always	10 kΩ or higher
A52-2 (+B) or 1B-4 - Body ground	Always	10 kΩ or higher
A52-1 (+B2) or 1B-4 - Body ground	Always	10 kΩ or higher

Check the harness and connectors between the integration relay and body ground.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1B-3 - Body ground Always Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.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:
for LHD
Tester Connection Condition Specified Condition
C45-81 (E1) - Body ground Always Below 1 Ω
for RHD
Tester Connection Condition Specified Condition
C46-81 (E1) - Body ground Always Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.INSPECT ECM (IGSW VOLTAGE)

Disconnect the ECM connectors.

Turn the engine switch on (IG).

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

Standard Voltage:
for LHD
Tester Connection Switch Condition Specified Condition
A38-28 (IGSW) - C45-81 (E1) Engine switch on (IG) 11 to 14 V
for RHD
Tester Connection Switch Condition Specified Condition
A52-28 (IGSW) - C46-81 (E1) Engine switch on (IG) 11 to 14 V

for LHD
Tester Connection	Switch Condition	Specified Condition
A38-28 (IGSW) - C45-81 (E1)	Engine switch on (IG)	11 to 14 V

for RHD
Tester Connection	Switch Condition	Specified Condition
A52-28 (IGSW) - C46-81 (E1)	Engine switch on (IG)	11 to 14 V

Go to step 6

REPLACE ECM ()

6.INSPECT FUSE (IGN)

Remove the IGN fuse from the engine room relay block.

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

Standard Resistance:
Tester Connection Condition Specified Condition
IGN fuse Always Below 1 Ω

CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE

OK

7.CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - ECM, INTEGRATION RELAY - BODY GROUND)

Remove the integration relay from the engine room relay block.

Disconnect the ECM connector.

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

Standard Resistance:
for LHD
Tester Connection Condition Specified Condition
1B-8 - A38-28 (IGSW) Always Below 1 Ω
1B-8 or A38-28 (IGSW) - Body ground Always 10 kΩ or higher
for RHD
Tester Connection Condition Specified Condition
1B-8 - A52-28 (IGSW) Always Below 1 Ω
1B-8 or A52-28 (IGSW) - Body ground Always 10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ENGINE ROOM RELAY BLOCK)

Remove the integration relay from the engine room relay block.

Disconnect the E2 main body ECU connector.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E2-11 (IG2D) - 1B-6 Always Below 1 Ω
E2-11 (IG2D) or 1B-6 - Body ground Always 10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.CHECK ENTRY AND START SYSTEM (POWER SOURCE MODE DOES NOT CHANGE)

Check the entry and start system ().

REPAIR ENTRY AND START SYSTEM

REPLACE ECM ()

1VD-FTV ENGINE CONTROL

Land Cruiser URJ200 URJ202 GRJ200 VDJ200

ECD SYSTEM w/ DPF