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 P0200 Click here.

INSPECTION PROCEDURE

Note


  • After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

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

PROCEDURE


  1. CHECK INJECTOR DRIVER (POWER SOURCE)


    1. A01DPGAE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Injector Driver)

      Disconnect the injector driver connectors.

    2. 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

    3. Reconnect the injector driver connector.


    NG

    INSPECT NO. 1 INTEGRATION RELAY (EDU) Click here

    OK

    REPLACE INJECTOR DRIVER Click here

  2. INSPECT NO. 1 INTEGRATION RELAY (EDU)


    1. Inspect the No. 1 integration relay (EDU) Click here.


    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.

    2. Disconnect the injector driver connector.

    3. 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

    4. Reconnect the No. 1 injector driver connector.

    5. 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.

    2. Disconnect the ECM connector.

    3. 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

    4. Reconnect the ECM connector.

    5. Reinstall the No. 1 integration relay.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here