Ecd System (W/O Dpf) - Injector Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK EDU (POWER SOURCE)

INSPECT FUSE (EFI)

INSPECT EDU RELAY (EDU 1 OR EDU 2)

INSPECT INTEGRATION NO.1 RELAY (EFI OR EFI MAIN 2)

CHECK HARNESS AND CONNECTOR (EDU RELAY - EDU)

CHECK HARNESS AND CONNECTOR (EDU RELAY - ECM)

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

CHECK HARNESS AND CONNECTOR (EDU - BODY GROUND)

ECD SYSTEM (w/o DPF) - Injector Circuit

DESCRIPTION

The injector driver drives the injectors at high speeds with a high-voltage DC/DC converter. The ECM constantly monitors the injector driver and stops the engine if an abnormal condition is detected.


WIRING DIAGRAM

Refer to DTC P062D ().


INSPECTION PROCEDURE

1.CHECK EDU (POWER SOURCE)

Disconnect the No. 1 injector driver (EDU) connectors.

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

Disconnect the No. 2 injector driver (EDU) connectors.

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

  • Standard Voltage:
  • No. 1
    Tester ConnectionSwitch ConditionSpecified Condition
    C74-8 (+B) - C73-1 (GND)Ignition switch ON11 to 14 V
  • No. 2
    Tester ConnectionSwitch ConditionSpecified Condition
    C76-8 (+B) - C75-1 (GND)Ignition switch ON11 to 14 V
NG
Go to step 2
OK
REPLACE INJECTOR DRIVER (No. 1 or No. 2) ()
2.INSPECT FUSE (EFI)
Ecd System (W/O Dpf) - Injector Circuit. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Remove the EFI MAIN and EFI MAIN 2 fuse from the engine room relay block.

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

  • Standard Resistance:
  • Tester ConnectionConditionSpecified Condition
    EFI MAIN fuseAlwaysBelow 1 Ω
    EFI MAIN 2 fuseAlwaysBelow 1 Ω
NG
CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE
OK
3.INSPECT EDU RELAY (EDU 1 OR EDU 2)

Inspect the EDU relay (EDU 1 or EDU 2) ().

NG
REPLACE EDU RELAY (EDU 1 OR EDU 2)
OK
4.INSPECT INTEGRATION NO.1 RELAY (EFI OR EFI MAIN 2)

Inspect the Integration relay (EFI or EFI MAIN 2) ().

NG
REPLACE INTEGRATION NO.1 RELAY
OK
5.CHECK HARNESS AND CONNECTOR (EDU RELAY - EDU)
Ecd System (W/O Dpf) - Injector Circuit. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Remove the EDU relay (EDU 1 or EDU 2) from the engine room relay block.

Remove the EDU connector.

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

  • Standard Resistance (Check for Open):
  • No. 1
    Tester ConnectionConditionSpecified Condition
    EDU 1 relay (5) - C74-8 (+B)AlwaysBelow 1 Ω
  • No. 2
    Tester ConnectionConditionSpecified Condition
    EDU 2 relay (5) - C76-8 (+B)AlwaysBelow 1 Ω
  • Standard Resistance (Check for Short):
  • No. 1
    Tester ConnectionConditionSpecified Condition
    EDU 1 relay (5) or C74-8 (+B) - Body groundAlways10 kΩ or higher
  • No. 2
    Tester ConnectionConditionSpecified Condition
    EDU 2 relay (5) or C76-8 (+B) - Body groundAlways10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
6.CHECK HARNESS AND CONNECTOR (EDU RELAY - ECM)
Ecd System (W/O Dpf) - Injector Circuit. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Remove the EDU relay (EDU 1 or EDU 2) from the engine room relay block.

Disconnect the ECM connector.

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

  • Standard Resistance (Check for Open):
  • No. 1 (LHD)
    Tester ConnectionConditionSpecified Condition
    EDU 1 relay (2) - A38-45 (IREL)AlwaysBelow 1 Ω
  • No. 2 (LHD)
    Tester ConnectionConditionSpecified Condition
    EDU 2 relay (2) - A38-46 (IRL2)AlwaysBelow 1 Ω
  • No. 1 (RHD)
    Tester ConnectionConditionSpecified Condition
    EDU 1 relay (2) - A52-45 (IREL)AlwaysBelow 1 Ω
  • No. 2 (RHD)
    Tester ConnectionConditionSpecified Condition
    EDU 2 relay (2) - A52-46 (IRL2)AlwaysBelow 1 Ω
  • Standard Resistance (Check for Short):
  • No. 1 (LHD)
    Tester ConnectionConditionSpecified Condition
    EDU 1 relay (2) or A38-45 (IREL) - Body groundAlways10 kΩ or higher
  • No. 2 (LHD)
    Tester ConnectionConditionSpecified Condition
    EDU 2 relay (2) or A38-46 (IRL2) - Body groundAlways10 kΩ or higher
  • No. 1 (RHD)
    Tester ConnectionConditionSpecified Condition
    EDU 1 relay (2) or A52-45 (IREL) - Body groundAlways10 kΩ or higher
  • No. 2 (RHD)
    Tester ConnectionConditionSpecified Condition
    EDU 2 relay (2) or A52-46 (IRL2) - Body groundAlways10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
7.CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - EDU RELAY, ECM, BODY GROUND)
Ecd System (W/O Dpf) - Injector Circuit. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200
Ecd System (W/O Dpf) - Injector Circuit. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Remove the integration relay from the engine room relay block.

Remove the EDU relay (EDU 1 or EDU 2).

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

  • Standard Resistance (Check for Open):
  • No. 1
    Tester ConnectionConditionSpecified Condition
    1B-4 - EDU 1 relay (1)AlwaysBelow 1 Ω
    1B-4 - EDU 1 relay (3)AlwaysBelow 1 Ω
  • No. 2
    Tester ConnectionConditionSpecified Condition
    1A-4 - EDU 2 relay (1)AlwaysBelow 1 Ω
    1A-4 - EDU 2 relay (3)AlwaysBelow 1 Ω
  • Standard Resistance (Check for Short):
  • No. 1
    Tester ConnectionConditionSpecified Condition
    1B-4 or EDU 1 relay (1) - Body groundAlways10 kΩ or higher
    1B-4 or EDU 1 relay (3) - Body groundAlways10 kΩ or higher
  • No. 2
    Tester ConnectionConditionSpecified Condition
    1A-4 or EDU 2 relay (1) - Body groundAlways10 kΩ or higher
    1A-4 or EDU 2 relay (3) - Body groundAlways10 kΩ or higher

Disconnect the ECM connector.

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

  • Standard Resistance (Check for Open):
  • No. 1 (LHD)
    Tester ConnectionConditionSpecified Condition
    1B-2 - A38-44 (MREL)AlwaysBelow 1 Ω
    1B-3 - Body groundAlwaysBelow 1 Ω
  • No. 2 (LHD)
    Tester ConnectionConditionSpecified Condition
    1A-2 - A38-44 (MREL)AlwaysBelow 1 Ω
    1A-3 - Body groundAlwaysBelow 1 Ω
  • No. 1 (RHD)
    Tester ConnectionConditionSpecified Condition
    1B-2 - A52-44 (MREL)AlwaysBelow 1 Ω
    1B-3 - Body groundAlwaysBelow 1 Ω
  • No. 2 (RHD)
    Tester ConnectionConditionSpecified Condition
    1A-2 - A52-44 (MREL)AlwaysBelow 1 Ω
    1A-3 - Body groundAlwaysBelow 1 Ω
  • Standard Resistance (Check for Short):
  • No. 1 (LHD)
    Tester ConnectionConditionSpecified Condition
    1B-2 or A38-44 (MREL) - Body groundAlways10 kΩ or higher
  • No. 2 (LHD)
    Tester ConnectionConditionSpecified Condition
    1A-2 or A38-44 (MREL) - Body groundAlways10 kΩ or higher
  • No. 1 (RHD)
    Tester ConnectionConditionSpecified Condition
    1B-2 or A52-44 (MREL) - Body groundAlways10 kΩ or higher
  • No. 2 (RHD)
    Tester ConnectionConditionSpecified Condition
    1A-2 or A52-44 (MREL) - Body groundAlways10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
8.CHECK HARNESS AND CONNECTOR (EDU - BODY GROUND)
Ecd System (W/O Dpf) - Injector Circuit. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the EDU connector.

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

  • Standard Resistance:
  • No. 1
    Tester ConnectionConditionSpecified Condition
    C73-1 (GND) - Body groundAlwaysBelow 1 Ω
  • Standard Resistance:
  • No. 2
    Tester ConnectionConditionSpecified Condition
    C75-1 (GND) - Body groundAlwaysBelow 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (EDU - BODY GROUND)
OK
CHECK ECM POWER SOURCE CIRCUIT ()