SMART ENTRY AND START SYSTEM (for Start Function) Power Source Mode does not Change to ON (IG)

DESCRIPTION

When the engine switch is pushed with the electrical key in the cabin, the power management control ECU receives signals to change the power source mode.

Tech Tips

To allow use of the GTS to inspect the push-button start function when the power source mode is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between the GTS and the power management control ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)

WIRING DIAGRAM

Refer to DTC B2271 Click here.

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)


    1. A01EIV4E06
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the D43 connector from the power management control ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D43-1 (AM22) - Body ground Always 9.5 to 16 V
      D43-2 (AM21) - Body ground Always 9.5 to 16 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)


    1. A01EIV4E02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the D43 connector from the power management control ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D43-5 (GND2) - Body ground Always Below 1 Ω
      D43-6 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

    OK

  3. INSPECT IG1 RELAY


    1. A01EKXQ

      Remove the IG1 relay from the main body ECU (driver side junction block assembly).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 93.8 to 136.4 Ω
      3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kΩ or higher
      3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 Ω

    NG

    REPLACE IG1 RELAY

    OK

  4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - DRIVER SIDE JUNCTION BLOCK)


    1. Disconnect the 2G connector from the main body ECU (driver side junction block assembly).

      A01EJCCE01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D43-20 (IG1D) - 2G-29 Always Below 1 Ω
      D43-20 (IG1D) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Management Control ECU)

      		 *2

      Front view of wire harness connector

      (to Main Body ECU (Driver Side Junction Block Assembly))

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - DRIVER SIDE JUNCTION BLOCK)

    OK

  5. CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK - BODY GROUND)


    1. A01EKPPE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Main Body ECU (Driver Side Junction Block Assembly))

      Disconnect the 2F connector from the main body ECU (driver side junction block assembly).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2F-16 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVER SIDE JUNCTION BLOCK - BODY GROUND)

    OK

  6. INSPECT MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


    1. Remove the main body ECU (driver side junction block assembly).

      A01EK87E01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2G-29 - IG1 relay terminal 2 Always Below 1 Ω
      2G-29 - Body ground Always 10 kΩ or higher
      2F-16 - IG1 relay terminal 1 Always Below 1 Ω
      2F-16 - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Components without harness connected

      (Main Body ECU (Driver Side Junction Block Assembly))

      		 *3

      Component without relay connected

      (IG1 relay terminal)
      *2

      Components without harness connected

      (Main Body ECU (Driver Side Junction Block Assembly))

      		 *4 -

    NG

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here

    OK

  7. INSPECT IG2 RELAY


    1. A01ELIA

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 93.8 to 136.4 Ω
      3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kΩ or higher
      3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 Ω

    NG

    REPLACE IG2 RELAY

    OK

  8. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - IG2 RELAY)


    1. Disconnect the D42 connector from the power management control ECU.

      A01EKN1E01

    2. Remove the IG2 relay from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D42-8 (IG2D) - IG2 relay terminal 1 Always Below 1 Ω
      D42-8 (IG2D) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connected

      (to Power Management Control ECU)

      		 *2

      Component without relay connected

      (IG2 relay terminal)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - IG2 RELAY)

    OK

  9. CHECK HARNESS AND CONNECTOR (IG2 RELAY - BODY GROUND)


    1. A01EKIYE01
      Text in Illustration
      *1

      Component without relay connected

      (IG2 Relay Terminal)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      IG2 relay terminal 2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - BODY GROUND)

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here