PUSH-BUTTON START Power Source Mode does not Change to ON (IG)

DESCRIPTION

If the power switch is pressed with the electrical key transmitter sub-assembly in the cabin, the power management control ECU receives a signal and changes the power source mode.

Tech Tips

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

WIRING DIAGRAM

A01G402E01

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The push-button start uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the push-button start after confirming that the communication systems are functioning properly.

  • Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart.

    Click here

  • If the push-button start is disabled through the customize function, enable the system before performing troubleshooting.

    Click here

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

  • After completing repairs, confirm that the problem does not recur.

Tech Tips

Related Data List and Active Test Items
Problem Symptom Data List Item Active Test Item
Power source mode does not change to on (IG) but does change to on (ACC)

    Power Source Control

  • Power Supply Condition

  • IG1 Relay Monitor (Inside)

  • IG2 Relay Monitor (Inside)

  • IG1 Relay Monitor (Outside)

  • IG2 Relay Monitor (Outside)

  • IG1 Circuit

  • IG2 Circuit

 -

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INTEGRATION RELAY, BODY GROUND)


    1. Disconnect the A130 power management control ECU connector.

    2. Disconnect the 1K integration relay connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A130-2 (IG2D) - 1K-2 Always Below 1 Ω
      1K-3 - Body ground Always Below 1 Ω
      A130-2 (IG2D) or 1K-2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT INTEGRATION RELAY (IG2 RELAY)


    1. Remove the integration relay.

      Click here

    2. Inspect the integration relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INTEGRATION RELAY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY, BODY GROUND)


    1. Disconnect the E112 power management control ECU connector.

    2. Disconnect the 3C and 3D instrument panel junction block assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E112-2 (IG1D) - 3D-24 Always Below 1 Ω
      3C-9 - Body ground Always Below 1 Ω
      E112-2 (IG1D) or 3D-24 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2 AND IG1 NO. 3 RELAY)


    1. Remove the instrument panel junction block assembly.

      for LHD: Click here

      for RHD: Click here

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      for LHD: Click here

      for RHD: Click here

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

      A01G3FYC02
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition

      • 3B-1 - 3A-38

        (IG1 NO. 1 relay)

      • 3B-1 - 3E-4

        (IG1 NO. 2 relay)

      • 3B-1 - 3D-30

        (IG1 NO. 3 relay)

      		 Auxiliary battery voltage not applied to terminals 3D-24 and 3C-9 10 kΩ or higher
      Auxiliary battery voltage applied to terminals 3D-24 and 3C-9 Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    C

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    A

  5. CHECK POWER MANAGEMENT CONTROL ECU


    1. A01G3LDC08
      *a

      Component with harness connected

      (Power Management Control ECU)

      Reconnect the A130 and E112 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
      A130-2 (IG2D) - Body ground Power switch on (ACC) → Power switch on (IG) 1 V or less → 9 V or higher
      E112-2 (IG1D) - Body ground Power switch on (ACC) → Power switch on (IG) 1 V or less → 9 V or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    CHECK RELAY CONTACT SIDE CIRCUIT

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU Click here