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

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

DESCRIPTION

When the electrical key transmitter sub-assembly is in the cabin and the power switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. In addition, when the power switch is pressed with the shift lever in P and the brake pedal depressed, the hybrid control system turns on (READY).

Tip:

  • When the certification ECU (smart key ECU assembly) 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 battery cable is disconnected and reconnected, the power source returns to the mode it was in before the auxiliary battery cable was disconnected.

Table 1. 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

  • Steering Unlock Switch

  • Power Supply Condition

  • IG1 Relay Monitor(Inside)

  • IG2 Relay Monitor(Inside)

  • IG1 Relay Monitor(Outside)

  • IG2 Relay Monitor(Outside)

  • Latch Circuit

  • Shift P Signal

  • Starter Request Signal

  • Entry&Start:

  • Immobiliser

  • S Code Check*

  • L Code Check

  • Engine Start Request

-

*: w/ ID Code Box (Immobiliser Code ECU)

WIRING DIAGRAM

Refer to "Power Source Mode does not Change to ON (IG and ACC)".

Click here

CAUTION / NOTICE / HINT

Note:

  • When using the GTS with the power switch off to troubleshoot:

    Connect the GTS to the DLC3 and turn a courtesy light switch on and off at 1.5 second intervals until communication between the GTS and vehicle begins.

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

  • If the entry and start system is disabled through the customize function, enable the system before performing troubleshooting.

    Click here

  • Before replacing the certification ECU (smart key ECU assembly), steering lock ECU (steering lock actuator assembly), ECM or ID code box (immobiliser code ECU) (w/ ID code box (immobiliser code ECU) refer to the entry and start system (for Start Function) precaution.

    Click here

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

  • If the steering lock ECU (steering lock actuator assembly) is replaced, be sure to confirm that the steering is unlocked by turning the steering wheel to the left and right before starting the hybrid control system. If the steering is locked for any reason, open and close a door with the power switch off, and then unlock the steering by pressing the power switch. This prevents the hybrid control system from starting while the steering is locked.

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

Tip:

If the brake pedal is repeatedly depressed while the hybrid control system is stopped, the brake booster pressure is released and the force required to depress the brake pedal to illuminate the stop lights increases.

PROCEDURE

  1. CHECK HYBRID CONTROL SYSTEM (READY ON)

    1. Place the electrical key transmitter sub-assembly on the driver seat.

    2. Move the shift lever to P.

    3. Depress the brake pedal.

    4. Confirm that the "Depress breake and power to start" is displayed, and then press the power switch and check that the hybrid system turns on (READY).

      OK

      Power source mode becomes on (READY).

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

  2. CHECK AUXILIARY BATTERY

    1. Measure the auxiliary battery voltage.

      Standard voltage

      11 to 14 V (IG OFF)

      Tip:

      • It may be possible to tell whether the vehicle auxiliary battery is discharged by operating the horn.

      • If the auxiliary battery voltage is less than 11 V, charge or replace it.

    Result

    Proceed to

    NEXT
    NEXT

  3. CHECK FOR DTC

    1. Using the GTS, confirm the output of DTCs for all systems.

      OK

      No DTCs are output.

      Note:

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

    Result

    Proceed to

    OK

    NG
    NG

    GO TO DTC CHART

    OK

  4. CHECK WAVE ENVIRONMENT

    1. If the problem occurs in certain locations or times of day, the possibility of wave interference is high.

      Tip:

      Whether or not the problem is due to wave interference can be checked by holding the electrical key transmitter sub-assembly near the door control receiver (RF band).

    Result

    Proceed to

    NEXT
    NEXT

  5. CHECK POWER SWITCH

    1. Get into the vehicle while carrying an electrical key transmitter sub-assembly.

    2. Move the shift lever to P.

    3. With the brake pedal released, 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 (ACC) and on (IG)

      B

      Power source mode changes to on (IG) but not to on (ACC)

      C

      Power source mode changes to on (ACC) but not to on (IG)

      D
    B

    GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG AND ACC)

    Click here

    C

    GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG)

    Click here

    D

    GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC)

    Click here

    A

  6. READ VALUE USING GTS (STEERING UNLOCK SWITCH)

    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Steering Unlock Switch

      State of steering unlock sensor signal output from steering lock actuator assembly

      ON or OFF

      ON: Steering unlocked

      OFF: Steering locked

      • When the shift lever is in P and the power switch is off, if any door is opened or closed, the steering is locked.

      • When the electrical key transmitter sub-assembly is in the cabin and the power switch is turned on (ACC) or on (IG), the steering unlocks.

      • The hybrid control system cannot be started when the steering unlock signal is off.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Steering Unlock Switch

      OK

      The item in the Data List indicates "ON" (the steering is unlocked).

    Result

    Proceed to

    OK

    NG
    NG

    GO TO STEERING LOCK SYSTEM (UNABLE TO UNLOCK STEERING WHEEL)

    Click here

    OK

  7. READ VALUE USING GTS (STOP LIGHT SWITCH1)

    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Stop Light Switch1

      State of brake pedal

      ON or OFF

      ON: Brake pedal depressed

      OFF: Brake pedal released

      • Use this item to determine whether the stop light switch is malfunctioning.

      • The hybrid control system cannot be started when this item is OFF.

      • If the stop light switch is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Stop Light Switch1

      OK

      The item in the Data List changes when the brake pedal is depressed and released.

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY)Click here

    OK

  8. READ VALUE USING GTS (L CODE CHECK)

    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

      Body Electrical > Entry&Start > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      L Code Check

      Verification result between ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator assembly)*1

      Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator assembly)*2

      OK or NG

      OK: Verification result normal

      NG: Verification result abnormal

      When NG is displayed:*1

      • The ID code for the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator assembly) is not registered or the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator assembly) is malfunctioning.

      • The steering cannot be locked.

      • The steering cannot be unlocked (the hybrid control system cannot be started).

      When NG is displayed:*2

      • The ID code for the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is not registered or the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is malfunctioning.

      • The steering cannot be locked.

      • The steering cannot be unlocked (the hybrid control system cannot be started).

      • *1: w/ ID Code Box (Immobiliser Code ECU)

      • *2: w/o ID Code Box (Immobiliser Code ECU)

      Body Electrical > Entry&Start > Data List

      Tester Display

      L Code Check
      Tip:

      • Reasons for verification failure:

      • The steering lock ECU (steering lock actuator assembly) or certification ECU (smart key ECU assembly) is malfunctioning.

      • There is a problem with the communication between ECUs.

      • An ECU is replaced, but is not registered.

      • An ECU is replaced with an ECU which has a code already stored in it.

      OK

      The Data List item changes to "OK" when the key is inside the vehicle.

    Result

    Proceed to

    OK

    NG
    NG

    READ VALUE USING GTS (STEERING LOCK ACTUATOR ASSEMBLY)Click here

    OK

  9. READ VALUE USING GTS (ENGINE START CONDITION)

    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

      Body Electrical > Entry&Start > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Engine Start Condition

      Status of hybrid control system start permission signal determined by steering lock ECU (steering lock actuator assembly)and sent to certification ECU (smart key ECU assembly)/ OK orNG

      OK or NG

      OK: Hybrid control system start permitted

      NG: Hybrid control system start prohibited

      • When Permitted is displayed, the certification ECU (smart key ECU assembly) receives an unlock confirmation signal from the steering lock ECU (steering lock actuator assembly) and starting of the hybrid control system is possible.

      • The hybrid control system cannot be started when Prohibited is displayed.
      Note:

      Check that the key warning is displayed on the multi-information display on the combination meter assembly, and then press the power switch.

      OK

      The display changes in response to the operation of the power switch.

    Result

    Proceed to

    OK (w/ ID Code Box (Immobiliser Code ECU))

    OK (w/o ID Code Box (Immobiliser Code ECU))

    NG
    OK (w/o ID Code Box (Immobiliser Code ECU))

    CHECK IMMOBILISER SYSTEMClick here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK (w/ ID Code Box (Immobiliser Code ECU))

  10. READ VALUE USING GTS (S CODE CHECK)

    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

      Body Electrical > Entry&Start > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      S Code Check

      Verification result between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU)

      OK or NG

      OK: Verification result normal

      NG: Verification result abnormal

      When NG is displayed:

      • The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning.

      • The steering cannot be locked.

      • The steering cannot be unlocked (the engine cannot be started).

      Body Electrical > Entry&Start > Data List

      Tester Display

      S Code Check
      Tip:

      • Reasons for verification failure:

      • The certification ECU (smart key ECU assembly) or the ID code box (immobiliser code ECU) is malfunctioning.

      • There is a problem with the communication between ECUs.

      • An ECU is replaced, but is not registered.

      • An ECU is replaced with an ECU which has a code already stored in it.

      OK

      OK (S code certification result normal) appears on the screen.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)Click here

    OK

  11. CHECK IMMOBILISER SYSTEM

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

      B264896C97

      *a

      Component with harness connected

      (Certification ECU (Smart Key ECUAssembly))

      -

      -

      1. Waveform 1

        B325021C02

        *a

        Approximately 160 ms

        *b

        Approximately 270 ms
        Table 2. Measurement Condition

        Item

        Content

        Tester Connection

        G82-14 (EFII) - G82-11 (E)

        Tool Setting

        2 V/DIV, 500 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

        B325022C01

        *a

        Approximately 160 ms

        *b

        Approximately 270 ms
        Table 3. Measurement Condition

        Item

        Content

        Tester Connection

        G82-13 (EFIO) - G82-11 (E)

        Tool Setting

        2 V/DIV, 500 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

        OK

        The waveform is displayed as shown in illustration.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  12. READ VALUE USING GTS (STARTER REQUEST SIGNAL)

    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Starter Request Signal

      Engine start request signal status

      ON or OFF

      OFF: After approx. 1 second has elapsed, the power switch is released

      ON: With the shift lever in P and brake pedal depressed, the power switch is pressed and held

      • When the hybrid control system cannot be started due to a start request signal malfunction, OFF is displayed.

      • When the power switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the power switch needs to be pressed and held for a certain period of time.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Starter Request Signal
      Note:

      Check that the key warning light on the combination meter assembly illuminates in green, and then press the power switch.

      OK

      The display changes in response to the operation of the power switch.

    Result

    Proceed to

    OK

    NG
    OK

    GO TO HYBRID CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  13. READ VALUE USING GTS (STEERING LOCK ACTUATOR ASSEMBLY)

    1. Replace the steering lock ECU (steering lock actuator assembly) with a new one.

      Click here

    2. Perform the registration procedures (Refer to the Service Bulletin).

    3. Use the Data List to check if L code certification is functioning properly again.

      Body Electrical > Entry&Start > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      L Code Check

      Verification result between ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator assembly)*1

      Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator assembly)*2

      OK or NG

      OK: Verification result normal

      NG: Verification result abnormal

      When NG is displayed:*1

      • The ID code for the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator assembly) is not registered or the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator assembly) is malfunctioning.

      • The steering cannot be locked.

      • The steering cannot be unlocked (the hybrid control system cannot be started).

      When NG is displayed:*2

      • The ID code for the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is not registered or the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is malfunctioning.

      • The steering cannot be locked.

      • The steering cannot be unlocked (the hybrid control system cannot be started).

      • *1: w/ ID Code Box (Immobiliser Code ECU)

      • *2: w/o ID Code Box (Immobiliser Code ECU)

      Body Electrical > Entry&Start > Data List

      Tester Display

      L Code Check

      OK

      OK (L code certification result normal) appears on the screen.

    Result

    Proceed to

    OK

    NG (w/ ID Code Box (Immobiliser Code ECU))

    NG (w/o ID Code Box (Immobiliser Code ECU))
    OK

    END

    NG (w/ ID Code Box (Immobiliser Code ECU))

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    NG (w/o ID Code Box (Immobiliser Code ECU))

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  14. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    1. Replace the certification ECU (smart key ECU assembly) with a new one (Refer to the Service Bulletin).

    2. Perform the registration procedures (Refer to the Service Bulletin).

    3. Use the Data List to check if S code certification is functioning properly again.

      Body Electrical > Entry&Start > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      S Code Check

      Verification result between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU)

      OK or NG

      OK: Verification result normal

      NG: Verification result abnormal

      When NG is displayed:

      • The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning.

      • The steering cannot be locked.

      • The steering cannot be unlocked (the engine cannot be started).

      Body Electrical > Entry&Start > Data List

      Tester Display

      S Code Check

      OK

      OK (S code certification result normal) appears on the screen.

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

  15. CHECK IMMOBILISER SYSTEM

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

      B264896C97

      *a

      Component with harness connected

      (Certification ECU (Smart Key ECUAssembly))

      -

      -

      1. Waveform 1

        B325021C02

        *a

        Approximately 160 ms

        *b

        Approximately 270 ms
        Table 4. Measurement Condition

        Item

        Content

        Tester Connection

        G82-14 (EFII) - G82-11 (E)

        Tool Setting

        2 V/DIV, 500 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

        B325022C01

        *a

        Approximately 160 ms

        *b

        Approximately 270 ms
        Table 5. Measurement Condition

        Item

        Content

        Tester Connection

        G82-13 (EFIO) - G82-11 (E)

        Tool Setting

        2 V/DIV, 500 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

        OK

        The waveform is displayed as shown in illustration.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  16. READ VALUE USING GTS (STARTER REQUEST SIGNAL)

    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Starter Request Signal

      Engine start request signal status

      ON or OFF

      OFF: After approx. 1 second has elapsed, the power switch is released

      ON: With the shift lever in P and brake pedal depressed, the power switch is pressed and held

      • When the hybrid control system cannot be started due to a start request signal malfunction, OFF is displayed.

      • When the power switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the power switch needs to be pressed and held for a certain period of time.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Starter Request Signal
      Note:

      Check that the key warning light on the combination meter assembly illuminates in green, and then press the power switch.

      OK

      The display changes in response to the operation of the power switch.

    Result

    Proceed to

    OK

    NG
    OK

    GO TO HYBRID CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  17. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY)

    1. Disconnect the G82 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A77*1 or A100*2 the stop light switch assembly connector.

      • *1: for RHD

      • *2: for LHD

    3. Disconnect the A110 skid control ECU (brake booster with master cylinder assembly) connector.

    4. Disconnect the A65 hybrid vehicle control ECU connector.

    5. Disconnect the A109 stop light control relay connector.

    6. Disconnect the G35 shift lock control ECU (lower shift lever assembly) connector.

    7. E233306C53

      *a

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

      for RHD:

      Measure the voltage and resistance according to the value(s) inthe table below.

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A77-7 (B) - Body ground

      Always

      11 to 14 V

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G82-18 (STP1) - A77-3 (L)

      Always

      Below 1 Ω

      G82-18 (STP1) or A77-3 (L) - Body ground

      10 kΩ or higher

      A77-2 (GND) - Body ground

      Below 1 Ω
    8. C285316C08

      *a

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

      for LHD:

      Measure the voltage and resistance according to the value(s) inthe table below.

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A100-1 (B) - Body ground

      Always

      11 to 14 V

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G82-18 (STP1) - A100-2 (L)

      Always

      Below 1 Ω

      G82-18 (STP1) or A73-2 (L) - Body ground

      10 kΩ or higher

      A100-3 (GND) - Body ground

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  18. INSPECT STOP LIGHT SWITCH ASSEMBLY

    1. Inspect the stop light switch assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY

    Click here