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

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DTC Code DTC Name
  Power Source Mode does not Change to ON (IG)
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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.

Table 1. Related Data List and Active Test Items
Problem Symptom Data List and Active Test
Power source mode does not change to on (IG) but does change to on (ACC)
  • Power Source Control

  • Power Supply Condition

  • IG Relay Monitor (Inside)

  • IG Relay Monitor (Outside)
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WIRING DIAGRAM

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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 entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

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

  • If the entry and start system (for Start Function) has been canceled, enable the system before performing troubleshooting.

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

  • Before replacing the power management control ECU or main body ECU (multiplex network body ECU), refer to entry and start system (for Start Function) Precaution.

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

Tip:

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.

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PROCEDURE


  1. Click here

    CHECK FOR DTC


    1. Using the GTS, check for DTCs.


      1. Body Electrical > Power Source Control > Trouble Codes



      1. Body Electrical > Entry&Start > Trouble Codes


      Result
      Result Proceed to
      DTCs are not output A
      Entry and start system (for Start Function) DTCs are output B

  2. Click here

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the K33 power management control ECU connector.

    2. Disconnect the 4B and 4A 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
      K33-2 (IG1D) - 4A-40 Always Below 1 Ω
      4B-7 - Body ground Always Below 1 Ω
      K33-2 (IG1D) or 4A-40 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. Click here

    CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - SEMICONDUCTOR PWR INTEGRATION ECU)


    1. Disconnect the 1E semiconductor pwr integration ECU connector.

    2. Disconnect the 4C instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4C-11 - 1E-1 Always Below 1 Ω
      4C-11 or 1E-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. Click here

    CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - IG1 MAIN RELAY)


    1. Disconnect the 4C instrument panel junction block assembly connector.

    2. Remove the IG1 MAIN relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4C-17 - 1 (IG1 MAIN relay) Always Below 1 Ω
      2 (IG1 MAIN relay) - Body ground Always Below 1 Ω
      4C-17 or 1 (IG1 MAIN relay) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. Click here

    CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2, IG1 NO. 3 RELAY)


    1. Remove the instrument panel junction block assembly.

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    2. A00209EC02
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-40 - 4B-7 20°C (68°F) 87.32 to 127.14 Ω
      4E-1 - 4A-16 Auxiliary battery voltage applied to terminals 4A-40 and 4B-7 Below 1 Ω
      Auxiliary battery voltage not applied to terminals 4A-40 and 4B-7 10 kΩ or higher
      4E-1 - 4A-35 Auxiliary battery voltage applied to terminals 4A-40 and 4B-7 Below 1 Ω
      Auxiliary battery voltage not applied to terminals 4A-40 and 4B-7 10 kΩ or higher
      4E-1 - 4B-32 Auxiliary battery voltage applied to terminals 4A-40 and 4B-7 Below 1 Ω
      Auxiliary battery voltage not applied to terminals 4A-40 and 4B-7 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

  6. Click here

    INSPECT SEMICONDUCTOR PWR INTEGRATION ECU (IG2 RELAY)


    1. Remove the semiconductor pwr integration ECU.

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    2. Inspect the semiconductor pwr integration ECU.

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      Result
      Proceed to
      OK
      NG

  7. Click here

    INSPECT IG1 MAIN RELAY


    1. Remove the IG1 MAIN relay.

    2. A0022LCC01
      *1 IG1 MAIN Relay

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage applied to terminals 1 and 2 Below 1 Ω
      Auxiliary battery voltage not applied to terminals 1 and 2 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

  8. Click here

    CHECK POWER MANAGEMENT CONTROL ECU


    1. Reconnect the K33 power management control ECU connector.

    2. Install the instrument panel junction block assembly.

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    3. Install the semiconductor pwr integration ECU.

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    4. Install the IG1 MAIN relay.

    5. A0022A2C48
      *a

      Component with harness connected

      (Power Management Control ECU)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K33-2 (IG1D) - Body ground Power switch on (ACC) → Power switch on (IG) 1 V or less → 9 V or higher
      Result
      Proceed to
      OK
      NG