СИСТЕМА ECD 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.

CAUTION / NOTICE / HINT

Note


  • After replacing the ECM, the new ECM needs registration (See page ) 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. Disconnect the injector driver connectors.

    2. B0027DKC63
      *a

      Front view of wire harness connector

      (to Injector Driver)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C82-2 (+B) - C82-3 (GND) Ignition switch ON 11 to 14 V

    3. Reconnect the injector driver connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE INJECTOR DRIVER Click here

    NG

  2. INSPECT EDU RELAY


    1. Inspect the EDU relay from engine room relay block.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE EDU RELAY

    OK

  3. CHECK HARNESS AND CONNECTOR (EDU RELAY - INJECTOR DRIVER)


    1. Remove the EDU relay from the engine room relay block and junction block assembly.

    2. Disconnect the injector driver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C82-2 (+B) - EDU relay tarminal 5 Always Below 1 Ω
      C82-3 (GND) - Body ground Always Below 1 Ω
      C82-2 (+B) or EDU relay tarminal 5 - Body ground Always 10 kΩ or higher

    4. Reconnect the injector driver connector.

    5. Reinstall the EDU relay.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (EDU RELAY - ECM)


    1. Remove the EDU relay from the engine room relay block and junction block assembly.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G84-10 (IREL) - EDU relay tarminal 2 Always Below 1 Ω
      G84-10 (IREL) or EDU relay tarminal 2 - Bodyground Always 10 kΩ or higher

    4. Reconnect the ECM connector.

    5. Reinstall the EDU relay.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR