СИСТЕМА ECD ECM Power Source Circuit

DESCRIPTION

When the ignition switch is turned ON, battery positive voltage is applied to the coil, closing the contacts of the MAIN relay (Marking: MAIN) and supplying power to the terminal +B of the ECM.

WIRING DIAGRAM

A01BDKKE01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT ECM (CHECK VOLTAGE)


    1. A01BCNHE11

      Turn the ignition switch ON.

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

      Standard voltage
      Tester Connection Specified Condition
      +B (B10-12) - E1 (D2-14) 9 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

  2. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)


    1. A01BBWZE03

      Disconnect the ECM D2 connector.

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

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      E1 (D2-14) - Body ground Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT INTEGRATION NO.1 RELAY (MAIN RELAY)


    1. A01BBFHE01

      Check that operation sound is heard from the integration relay (MAIN relay) in connection with the operation (on/off) of the ignition switch.

      OK
      Operation sound can be heard.

    NG

    INSPECT ECM (CHECK VOLTAGE) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (ECM - BATTERY)


    1. A01BGZPE01

      Disconnect the battery negative cable.

    2. Disconnect the battery positive cable.

    3. Disconnect the engine room R/B & J/B No.1 1B, 1J and 1K connectors.

    4. Disconnect the engine room R/B & J/B No.1 1D connector.

    5. Disconnect the ECM B10 connector.

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

      Standard resistance
      Tester Connection Specified Condition
      +B (B10-12) - (1J-4) Below 1 Ω
      (1K-1) - (1B-3) Below 1 Ω
      (1D-1) - Positive terminal of the battery Below 1 Ω

      Note

      After reconnecting the battery cable, the radio and clock should be adjusted as they were previously.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE INTEGRATION NO.1 RELAY

  5. INSPECT ECM (CHECK VOLTAGE)


    1. A01BCNHE12

      Turn the ignition switch ON.

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

      Standard voltage
      Tester Connection Specified Condition
      MREL (B10-3) - E1 (D2-14) 9 to 14 V

    NG

    INSPECT ECM (CHECK VOLTAGE) Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)


    1. A01BDSBE01

      Disconnect the ECM B10 connector.

    2. Disconnect the engine room R/B & J/B No.1 1J connector.

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

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      MREL (B10-3) - (1J-2) Below 1 Ω
      (1J-3) - Body ground Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE INTEGRATION NO.1 RELAY

  7. INSPECT ECM (CHECK VOLTAGE)


    1. A01BCNHE13

      Turn the ignition switch ON.

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

      Standard voltage
      Tester Connection Specified Condition
      IGSW (B10-14) - E1 (D2-14) 9 to 14 V

    NG

    CHECK FUSE (IGN FUSE) Click here

    OK

    REPLACE ECM

  8. CHECK FUSE (IGN FUSE)


    1. A01BD11E01

      Remove the IGN fuse from the instrument panel J/B.

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

      Standard resistance
      Tester Connection Specified Condition
      IGN fuse Below 1 Ω (Continuity)

    NG

    REPLACE FUSE (IGN FUSE)

    OK

  9. INSPECT IGNITION SWITCH


    1. A01BBIKE01

      Disconnect the ignition switch connector.

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

      Standard resistance (Ignition switch position is LOCK)
      Tester Connection Specified Condition
      All terminals 10 kΩ or higher
      Standard resistance (Ignition switch position is ACC)
      Tester Connection Specified Condition
      2 - 3 Below 1 Ω
      Standard resistance (Ignition switch position is ON)
      Tester Connection Specified Condition
      2 - 3 - 4 Below 1 Ω
      6 - 7 Below 1 Ω
      Standard resistance (Ignition switch position is START)
      Tester Connection Specified Condition
      1 - 2 - 4 Below 1 Ω
      7 - 8 Below 1 Ω

    NG

    REPLACE IGNITION SWITCH

    OK

    CHECK AND REPLACE HARNESS AND CONNECTOR (ECM - BATTERY)