SMART KEY SYSTEM (for Start Function) Power Source Mode does not Change to ON (READY)

DESCRIPTION

When the electrical key transmitter sub-assembly is in the vehicle and the power switch is pressed, the power management control ECU receives a signal and changes the power source mode. In addition, when the shift lever is in P and the brake pedal is depressed, the hybrid control system can be started by pressing the power switch.

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

Refer to "System Diagram" Click here

INSPECTION PROCEDURE

Note


  • When using the Techstream 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 Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus:

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

    for Smart Key: Body Electrical / Smart Key / DTC.

  • The smart key 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 smart key system (for Start Function) after confirming that the communication systems are functioning properly.

  • If the smart key system is disabled through the customize function, enable the system before performing troubleshooting Click here.

  • Before replacing the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly), refer to the smart key 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.

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

  • 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


    Smart Key

  • L Code Check

  • Engine Start Request

 -

PROCEDURE


  1. CHECK HYBRID CONTROL SYSTEM (READY ON)


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

    2. Depress the brake pedal.

    3. Confirm that the smart warning light is displayed, and then press the power switch and check that the hybrid system turns on (READY).

      OK
      Power source mode becomes on (READY).

    NG

    CHECK AUXILIARY BATTERY Click here

    OK

    END (HYBRID SYSTEM PERMISSION CONDITIONS WERE NOT SATISFIED)

  2. CHECK AUXILIARY BATTERY


    1. Measure the auxiliary battery voltage.

      Standard voltage
      11 to 14 V (power switch off)

      Tech Tips


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

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


    NEXT

  3. CHECK FOR DTC (ALL)


    1. Using the Techstream, 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.


    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.

      Tech Tips

      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).


    NEXT

  5. CHECK POWER SWITCH CONDITION


    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 TECHSTREAM (STEERING UNLOCK SWITCH)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

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

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

      Power Source Control
      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 inside the vehicle 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.
      OK
      The item in the Data List indicates "ON" (the steering is unlocked).

    NG

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

    OK

  7. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

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

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

      Power Source Control
      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.

      • When this item is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time.
      OK
      The item in the Data List changes when the brake pedal is depressed and released.

    NG

    INSPECT STOP LIGHT SWITCH ASSEMBLY Click here

    OK

  8. READ VALUE USING TECHSTREAM (L CODE CHECK)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Body Electrical / Smart Key / Data List.

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

      Smart Key
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      L Code Check Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator assembly)/OK or NG

      OK: Verification result normal

      NG: Verification result abnormal

      • When NG is displayed:


      • L code has not been registered for the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly).

      • Steering wheel cannot be locked.

      • Steering wheel cannot be unlocked (the hybrid control system cannot be started).
      OK
      The Data List item changes to "OK" when the electrical key transmitter sub-assembly is inside the vehicle.

      Tech Tips

      Reasons for verification failure:


      • The steering lock ECU (steering lock actuator 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.


    NG

    CHECK STEERING LOCK ACTUATOR ASSEMBLY Click here

    OK

  9. READ VALUE USING TECHSTREAM (STARTER REQUEST SIGNAL)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Body Electrical / Smart Key / Data List.

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

      Smart Key
      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 or NG

      OK: Hybrid control system start permitted

      NG: Hybrid control system start prohibited

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

      • The hybrid control system cannot be started when NG is displayed.

      Note

      Check that the smart 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.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

  10. CHECK ENGINE IMMOBILISER SYSTEM


    1. A01HUPSE07
      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

        A01HV42E01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection I4-20 (IMO) - I3-6 (E1)
        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

        A01HSPQE01
        Text in Illustration
        *a Approximately 160 ms *b Approximately 270 ms
        Measurement Condition
        Item Content
        Tester Connection I4-21 (IMI) - I3-6 (E1)
        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.

    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) Click here

    OK

  11. READ VALUE USING TECHSTREAM (STARTER REQUEST SIGNAL)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

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

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

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

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

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

      • 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 amount of time.

      Note

      Check that the smart 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.

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

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

  12. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. Disconnect the A33 connector from the stop light switch assembly.

    2. Inspect the stop light switch assembly Click here.


    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the A33 connector from the stop light switch assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A39-23 (STP) - A33-1 Always Below 1 Ω
      A39-23 (STP) or A33-1 - Body ground Always 10 kΩ or higher

    3. Reconnect the A33 stop light switch assembly connector.

    4. A01HT6JE11
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the A39 connector from the power management control ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A39-23 (STP) - Body ground Brake pedal released 1 V or less
      Brake pedal depressed 9 V or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  14. CHECK 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 Click here.


    NEXT

  15. CHECK HYBRID CONTROL SYSTEM (READY ON)


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

    2. Depress the brake pedal.

    3. Confirm that the smart warning light is displayed, and then press the power switch and check that the hybrid system turns on (READY).

      OK
      Power source mode becomes on (READY).

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

    END (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) WAS DEFECTIVE)

  16. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))


    1. Disconnect the I4 connector from the power management control ECU.

    2. Disconnect the I87 connector from the certification ECU (smart key ECU assembly).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I4-20 (IMO) - I87-10 (EFII) Always Below 1 Ω
      I4-21 (IMI) - I87-14 (EFIO) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Replace the certification ECU (smart key ECU assembly) with a new one Click here.

    2. Perform the registration procedures Click here.


    NEXT

  18. CHECK HYBRID CONTROL SYSTEM (READY ON)


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

    2. Depress the brake pedal.

    3. Confirm that the smart warning light is displayed, and then press the power switch and check that the hybrid system turns on (READY).

      OK
      Power source mode becomes on (READY).

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

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