PUSH-BUTTON START 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 power management control ECU 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).

Related Data List and Active Test Items
Problem Symptom Data List and Active Test
Power source mode does not change to ON (READY)

    Power Source Control

  • Stop Light Switch1

  • Steering Unlock Switch

  • Shift P Signal

  • IG Relay Monitor (Inside)

  • IG Relay Monitor (Outside)

  • Latch Circuit

  • Starter Request Signal

  • Power Supply Condition


    Entry&Start

  • Immobiliser

  • Engine Start Request

  • S Code Check

  • L Code Check

WIRING DIAGRAM

Click here

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 push-button start uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the push-button start after confirming that the communication systems are functioning properly.

    Click here

  • If the push-button start has been canceled, enable the system before performing troubleshooting.

    Click here

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

  • Before replacing the power management control ECU, certification ECU (smart key ECU assembly) or electrical key transmitter sub-assembly, refer to push-button start Precaution.

    Click here

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

Tech Tips


  • 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.

  • If the power source mode is changed from on (IG) to on (ACC) with the shift lever in any position other than P, then the shift lever is moved to P and the power switch is pressed with the brake pedal depressed, the power source mode will changed off.

PROCEDURE


  1. CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY


    1. Press a switch of the electrical key transmitter sub-assembly.

      OK
      The electrical key transmitter sub-assembly LED illuminates.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  2. READ VALUE USING GTS (KEY LOW BATTERY)


    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. Read the Data List according to the display on the GTS.


      Body Electrical > Entry&Start > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Key Low Battery Transmitter battery depleted No or Yes

      No: Transmitter battery not depleted

      Yes: Transmitter battery depleted

      The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. The certification ECU (smart key ECU assembly) displays "Yes" for the "Key Low Battery" item of the Data List when this voltage information indicates 2.2 V or less. This Data List item should be checked when the electrical key transmitter sub-assembly is at room temperature (example: at -20°C (-4°F), "Yes" may be displayed even if the transmitter battery is new).

      Body Electrical > Entry&Start > Data List
      Tester Display
      Key Low Battery
      OK
      "No" is displayed on the GTS screen.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  3. 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 the problem is due to wave interference can be checked by holding the electrical key transmitter sub-assembly near the door control receiver.

      OK
      Power source mode changes to on (READY).
      Result
      Proceed to
      OK
      NG

    OK
    NG
  4. 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
      Power source mode changes : Off → on (ACC) → on (IG) → off A
      Power source mode does not change to on (ACC) or 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
    C
    D
    A
  5. READ VALUE USING GTS (SHIFT P 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. Read the Data List according to the display on the GTS.


      Body Electrical > Power Source Control > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Shift P Signal Shift position P OFF or ON

      OFF: Shift lever not in P

      ON: Shift lever in P

      Use this item to determine whether the shift lever position switch (P) is malfunctioning.

      Body Electrical > Power Source Control > Data List
      Tester Display
      Shift P Signal
      OK
      The item in the Data List changes according to the shift position.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  6. CHECK FOR DTC


    1. Using the GTS, check for DTCs.


      Body Electrical > Power Source Control > Trouble Codes
      Body Electrical > Entry&Start > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      Push-button start DTCs are output B

    B
    A
  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. Read the Data List according to the display on the GTS.


      Body Electrical > Power Source Control > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Stop Light Switch1 State of brake pedal OFF or ON

      OFF: Brake pedal released

      ON: Brake pedal depressed


      • 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 GTS display changes correctly in response to the brake operation.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  8. 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. Read the Data List according to the display on the GTS.


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

      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 indicator is displayed on the multi-information display in the combination meter assembly, and then press the power switch.

      OK
      The GTS display changes correctly in response to the power switch operation.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  9. CHECK STEERING LOCK


    1. Check that the steering unlocks when the power switch is turned on (ACC).

      OK
      The steering unlocks.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  10. CHECK SECURITY INDICATOR LIGHT (IMMOBILISER SYSTEM UNSET)


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

    2. Move the shift lever to P.

    3. Press the power switch with the brake pedal released and check that the security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC).

      Tech Tips

      The immobiliser function can be determined to be operating correctly if the security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC).

      OK
      The security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC).
      Result
      Proceed to
      OK
      NG

    OK
    NG
  11. INSPECT TRANSMITTER BATTERY


    1. Inspect the transmitter battery.

      Click here

      Note

      Do not wrap the lead wire around a terminal, wedge it between terminals, or solder it. The terminal may be deformed or damaged, and the transmitter battery will not be able to be installed correctly.

      Result
      Proceed to
      OK
      NG

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


    1. Disconnect the K33 power management control ECU connector.

    2. Disconnect the A56 stop light switch assembly connector.

    3. A002179C32
      *a

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A56-1 (B) - Body ground Power switch off 11 to 14 V
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      K33-10 (STP) - A56-2 (L) Always Below 1 Ω
      K33-10 (STP) or A56-2 (L) - Body ground Always 10 kΩ or higher
      A56-3 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG
    OK
  13. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. Inspect the stop light switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK
    NG