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

DESCRIPTION

When the power 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 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 B2274 Click here.

INSPECTION PROCEDURE

PROCEDURE


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


    1. Disconnect the L5 and L6 power management control ECU connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L5-1 (AM22) - Body ground Always 9.5 to 16 V
      L6-7 (AM21) - Body ground Always 9.5 to 16 V

    NG

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

    OK

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


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L5-5 (E01) - Body ground Always Below 1 Ω
      L5-6 (E1) - Body ground Always Below 1 Ω
      L6-4 (E12) - Body ground Always Below 1 Ω
      L6-5 (E02) - Body ground Always Below 1 Ω

    NG

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

    OK

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. A0041BJE13
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      Remove the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2A-43 - 2B-4 20°C (68°F) 81.49 to 118.98 Ω
      2A-43 - 2B-6 20°C (68°F) 81.49 to 118.98 Ω
      2B-4 - 2B-6 Always Below 1 Ω

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL J/B)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L6-1 (ACCD) - 2A-43 Always Below 1 Ω
      L6-1 (ACCD) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2B-4 - Body ground Always Below 1 Ω
      2B-6 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)

    OK

  6. INSPECT POWER MANAGEMENT CONTROL ECU


    1. A0042SRE31
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

      Reinstall the instrument panel junction block assembly.

    2. Reconnect the L6 connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L6-1 (ACCD) - Body ground Power switch on (ACC) Output voltage at terminal AM21 or AM22 is -2.5 V or more

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here