Ecd System Injector Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK INJECTOR DRIVER (POWER SOURCE)

INSPECT NO. 1 INTEGRATION RELAY (EDU)

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY (EDU) - INJECTOR DRIVER)

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

ECD SYSTEM - 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 P0200 (LandCruiser RM00000187V09EX_06.html).

INSPECTION PROCEDURE

NOTICE:
  1. After replacing the ECM, the new ECM needs registration (LandCruiser RM0000012XK0ARX.html) and initialization (LandCruiser RM000000TIN08CX.html).
  2. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
1.CHECK INJECTOR DRIVER (POWER SOURCE)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Kd-Ftv Engine Control.Ecd System.Ecd System Injector Circuit

  1. Disconnect the injector driver connectors.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C88-2 (+B) - C88-3 (GND)
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Injector Driver)

  1. Reconnect the injector driver connector.



NG
Go to step 2
OK

REPLACE INJECTOR DRIVER (LandCruiser RM0000045BG009X.html)

2.INSPECT NO. 1 INTEGRATION RELAY (EDU)

  1. Inspect the No. 1 integration relay (EDU) (LandCruiser RM000004691018X_01_0005.html).



NG
REPLACE NO. 1 INTEGRATION RELAY (EDU)
OK


3.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY (EDU) - INJECTOR DRIVER)

  1. Remove the No. 1 integration relay from the engine room relay block.

  1. Disconnect the injector driver connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    C88-2 (+B) - 1B-8
    		Always
    		Below 1 Ω
    C88-3 (GND) - Body ground
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    C88-2 (+B) or 1B-8 - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the No. 1 injector driver connector.

  1. Reinstall the integration relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - ECM)

  1. Remove the No. 1 integration relay from the engine room relay block.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    G58-12 (IREL) - 1B-7
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    G58-12 (IREL) or 1B-7 - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the ECM connector.

  1. Reinstall the No. 1 integration relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (LandCruiser RM0000013Z002CX.html)