ECD SYSTEM (w/ 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 P0201 Click here.

INSPECTION PROCEDURE

Note


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

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

  • After replacing the fuel supply pump assembly or suction control valve, the ECM needs initialization Click here.

  • After replacing an injector assembly, the ECM needs registration Click here.

PROCEDURE


  1. CHECK TERMINAL VOLTAGE (INJECTOR DRIVER POWER SOURCE)


    1. A01KG57E18
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Injector Driver)

      Disconnect the injector driver connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E22-2 (+B) - E22-4 (GND) Ignition switch ON 11 to 14 V

    NG

    INSPECT EDU RELAY Click here

    OK

    REPLACE INJECTOR DRIVER Click here

  2. INSPECT EDU RELAY


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

    2. A01KIHJE01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Battery voltage not applied to terminals 1 and 2 10 kΩ or higher
      Battery voltage applied to terminals 1 and 2 Below 1 Ω

    NG

    REPLACE EDU RELAY

    OK

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


    1. Remove the EDU 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
      Tester Connection Condition Specified Condition
      E22-2 (+B) - EDU relay holder 3 Always Below 1 Ω
      E22-4 (GND) - Body ground Always Below 1 Ω
      E22-2 (+B) or EDU relay holder 3 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Remove the EDU 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
      Tester Connection Condition Specified Condition
      E16-12 (IREL) - EDU relay holder 2 Always Below 1 Ω
      E16-12 (IREL) or EDU relay holder 2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here