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 key in the cabin, the power management control ECU receives signals to switch the power source mode.

WIRING DIAGRAM

Refer to "Power Source Mode does not Change to on (IG and ACC)" Click here.

INSPECTION PROCEDURE

Note


  • When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the vehicle, and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.

  • Before performing the inspection, check that there are no problems related to the CAN communication system and LIN communication system.

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

PROCEDURE


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


    1. A00E9MWE23
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the D111 power management control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D111-2 (AM21) - Body ground Always 9.5 to 16 V
      D111-1 (AM22) - Body ground

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


    1. Disconnect the D111 power management control ECU connector.

    2. A00E9MWE24
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D111-6 (GND) - Body ground Always Below 1 Ω
      D111-5 (GND2) - Body ground

    NG
    OK
  3. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 RELAY)


    1. A00EAQ5E01
      Text in Illustration
      *1

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      Disconnect the DE and DF instrument panel junction block assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      DF-3 - DE-17 (relay coil side circuit) 20°C (68°F) 151 to 203 Ω

    NG
    OK
  4. INSPECT IG1 RELAY


    1. A00E76TE51

      Remove the IG1 relay from 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
      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
    OK
  5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)


    1. Disconnect the D111 and D113 power management control ECU connectors.

      A00E9FWE04
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      D113-8 (IG2D) - Body ground 20°C (68°F) 255 to 387 Ω
      D111-20 (IG1D) - Body ground 20°C (68°F) 151 to 203 Ω
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)


    NG
    OK
  6. CHECK POWER MANAGEMENT CONTROL ECU


    1. Connect the power management control ECU connectors.

      A00E84DE49
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D113-8 (IG2D) - Body ground Engine switch off Below 1.0 V
      Engine switch on (IG) ((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher
      D111-20 (IG1D) - Body ground Engine switch off Below 1.0 V
      Engine switch on (IG) ((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher
      Text in Illustration
      *1

      Component with harness connected

      (Power Management Control ECU)


    NG
    OK
  7. CHECK ENGINE SWITCH


    1. Check that the power source mode changes to on (ACC) and on (IG) when operating the engine switch.

      OK
      The power source mode changes to on (ACC) and on (IG) in response to the operation of the engine switch.

    NG
    OK
  8. REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 RELAY)


    1. Replace the instrument panel junction block (IG1 relay) with a new or normally functioning part, or repair or replace any damaged wire harness or connector.


    NEXT
  9. CHECK POWER MANAGEMENT CONTROL ECU


    1. Connect the power management control ECU connectors.

      A00E84DE49
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D113-8 (IG2D) - Body ground Engine switch off Below 1.0 V
      Engine switch on (IG) ((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher
      D111-20 (IG1D) - Body ground Engine switch off Below 1.0 V
      Engine switch on (IG) ((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher
      Text in Illustration
      *1

      Component with harness connected

      (Power Management Control ECU)


    NG
    OK
  10. CHECK ENGINE SWITCH


    1. Check that the power source mode changes to on (ACC) and on (IG) when operating the engine switch.

      OK
      The power source mode changes to on (ACC) and on (IG) in response to the operation of the engine switch.

    NG
    OK