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

DESCRIPTION

When the electronic key is in the cabin and the power switch is pressed, the power management control ECU receives a signal and changes the power source mode. In addition, when the power switch is pressed with park (P) selected and the brake pedal depressed, the hybrid control system turns on (READY).

Tech Tips


  • When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) auxiliary battery terminal, the power source mode changes to on (IG).

  • When the auxiliary battery cable is disconnected and reconnected, the power source returns to the mode it was in before the auxiliary battery cable was disconnected.

WIRING DIAGRAM

A003V58E01
A003VD9E03

INSPECTION PROCEDURE

Note


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

  • When using the intelligent tester with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the intelligent tester and vehicle begins, or 2) connect the intelligent tester to the vehicle, select the vehicle type under manual mode, and then enter the following menus:

    for Power Source Control: Body / Power Source Control / DTC.

    for Entry&Start: Body / Entry&Start / DTC.

  • The push-button start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting Click here.

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

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

  • When replacing the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU), registration must be performed refer to the Service Bulletin.

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

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 (READY)

    Power Source Control

  • Stop Light Switch1

  • Power Supply Condition

  • IG1 Relay Monitor (Inside)

  • IG2 Relay Monitor (Inside)

  • IG1 Relay Monitor (Outside)

  • IG2 Relay Monitor (Outside)

  • Latch Circuit

  • Starter Request Signal


    Entry&Start

  • S Code Check

  • L Code Check

  • Engine Start Request

  • Immobiliser

 -

PROCEDURE


  1. CHECK HYBRID CONTROL SYSTEM READY ON


    1. Place the electrical key on the driver seat.

    2. Depress the brake pedal.

    3. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid control system turns on (READY).

      OK
      Power source mode becomes on (READY).

    NG

    CHECK FOR DTC Click here

    OK

    END (HYBRID CONTROL SYSTEM PERMISSION CONDITIONS WERE NOT SATISFIED)

  2. CHECK FOR DTC


    1. Turn the power switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the intelligent tester on.

    5. Enter the following menus: Powertrain / Hybrid Control / DTC.

    6. Check for DTCs.

      OK
      DTC is not output.

    NG

    GO TO HYBRID CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    OK

  3. CHECK FOR DTC


    1. Enter the following menus: Body / Power Source Control / DTC.

    2. Check for DTCs.

      OK
      DTC is not output.

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  4. CHECK POWER SOURCE CONDITION


    1. Check the power source mode change.


      1. When the key is inside the vehicle and the park (P) is selected, check that pressing the power switch causes the power source mode to change.

        Result
        Result Proceed to
        off → on (ACC) → on (IG) → off A
        Power source mode does not change to on (IG and ACC) B
        Power source mode does not change to on (IG) C
        Power source mode does not change to on (ACC) D

    B

    GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (IG and ACC)) Click here

    C

    GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (IG)) Click here

    D

    GO TO OTHER FLOW CHART (Power Source Mode does not Change to ON (ACC)) Click here

    A

  5. READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH ASSEMBLY)


    1. Read the Data List according to the display on the intelligent tester.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light Switch1 Stop light switch 1/ON or OFF

      ON: Brake pedal depressed

      OFF: Brake pedal released

      		 -
      OK
      ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen.

    NG

    Click here

    OK

  6. READ VALUE USING INTELLIGENT TESTER (L CODE)


    1. Enter the following menus: Body / Entry&Start / Data List.

    2. Read the Data List according to the display on the intelligent tester.

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      L Code Check L code certification result/OK or NG

      OK: L code certification result normal

      NG: L code certification result abnormal

      		 -
      OK
      OK appears on the screen.

    NG

    REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Click here

    OK

  7. READ VALUE USING INTELLIGENT TESTER (ENGINE START REQUEST)


    1. Read the Data List according to the display on the intelligent tester.

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Start Request Start request signal response/OK or NG

      OK: Start request condition signal received

      NG: Start request condition signal not received

      		 -
      OK
      OK appears on the screen.
      Result
      Result Proceed to
      OK A
      NG B

    B

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A

  8. READ VALUE USING INTELLIGENT TESTER (S CODE)


    1. Read the Data List according to the display on the intelligent tester.

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      S Code Check S code certification result/OK or NG

      OK: S code certification result normal

      NG: S code certification result abnormal

      		 -
      OK
      OK appears on the screen.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

  9. CHECK ID CODE BOX (IMMOBILISER CODE ECU)


    1. A003W51E05
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

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


      1. Waveform 1

        A003XI1E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 510 ms
        Measurement Condition
        Item Content
        Tester Connection H4-20 (IMO) - H3-6 (E1)
        Tool Setting 2 V/DIV., 200 ms/DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

      2. Waveform 2

        A003ZTPE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 510 ms
        Measurement Condition
        Item Content
        Tester Connection H4-21 (IMI) - H3-6 (E1)
        Tool Setting 2 V/DIV., 200 ms/DIV.
        Condition Power switch on (IG)
        OK
        The waveform is displayed as shown in illustration.

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    OK

  10. READ VALUE USING INTELLIGENT TESTER


    1. Enter the following menus: Body / Power Source Control / Data List.

    2. Read the Data List according to the display on the intelligent tester.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Starter Request Signal Hybrid control system start request signal / ON or OFF

      ON: STSW signal is on

      OFF: STSW signal is off

      		 -
      OK
      Data List display changes when the power switch is operated.

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

    GO TO HYBRID CONTROL SYSTEM Click here

  11. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. A003ZMJE24
      Text in Illustration
      *a

      Component without harness connected

      (Stop Light Switch Assembly)
      *b Free
      *c Pushed in

      Remove the stop light switch assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Pushed 10 kΩ or higher
      1 - 2 Not pushed Below 1 Ω

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

  12. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)


    1. Disconnect the A20 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
      A20-23 (STP) - A25-1 Always Below 1 Ω
      A20-23 (STP) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  13. REPLACE TRANSMISSION CONTROL ECU ASSEMBLY


    1. Replace transmission control ECU assembly Click here.


    NEXT

  14. CHECK HYBRID CONTROL SYSTEM READY ON


    1. Place the electrical key on the driver seat.

    2. Depress the brake pedal.

    3. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid control system turns on (READY).

      OK
      Power source mode becomes on (READY).

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    OK

    END (TRANSMISSION CONTROL ECU WAS DEFECTIVE)

  15. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Replace the certification ECU (smart key ECU assembly).


    NEXT

  16. CHECK HYBRID CONTROL SYSTEM READY ON


    1. Place the electrical key on the driver seat.

    2. Depress the brake pedal.

    3. Check that the power switch indicator light is green. Then press the power switch to check if the hybrid control system turns on (READY).

      OK
      Power source mode becomes on (READY).

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    OK

    END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)