PUSH-BUTTON START Power Source Mode does not Change to ON (IG and ACC)

DESCRIPTION

If any of the following operations are performed, the certification ECU (smart key ECU assembly) receives a signal, and changes the power source mode.


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 room oscillator does not recognize the key, the cause of the malfunction may be stored in the certification ECU (smart key ECU assembly).

  • If the cause of the malfunction is stored in the certification ECU (smart key ECU assembly), the following table is helpful in checking whether or not the malfunction was caused by wave interference.

Radio Wave Interference:
Problem Symptom Data List Item
Operating Power Switch / Key RF Signal Interference

  • When the power switch was operated, the electrical key transmitter sub-assembly could not be confirmed due to wave interference. Therefore, the output frequency was switched to the other channel (changed from channel 1 to channel 2 or from channel 2 to channel 1).

  • If the cause of the malfunction has not been stored but any devices that can cause wave interference in the cabin have been removed and the room oscillator successfully recognizes the key, the possibility of wave interference is high.
Related Data List and Active Test Items
Problem Symptom Data List Item Active Test Item
Power source mode does not change to on (IG) or on (ACC)

    Power Source Control

  • Stop Light Switch1

  • Start Switch1

  • Start Switch2

  • Power Supply Condition

  • IG1 Relay Monitor(Inside)

  • IG2 Relay Monitor(Inside)

  • IG1 Relay Monitor(Outside)

  • IG2 Relay Monitor(Outside)

  • Latch Circuit

  • ACC Relay Monitor

 -

WIRING DIAGRAM

A000SYFE01
A000N1WE07
*a IG2 MAIN
*b No. 1 Engine Room Relay Block and Junction Block Assembly (No. 1 Integration Relay)
*c Power Management Control ECU

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 / Entrt&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 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 push-button start after confirming that the communication systems are functioning properly.

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

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

  • Before replacing the power management control ECU or electrical key transmitter sub-assembly, refer to the push-button start precaution Click here.

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

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

PROCEDURE


  1. CHECK POWER SOURCE MODE


    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 power source mode changes.

      OK
      The power source mode changes.

    OK

    END (AFFECTED BY WAVE INTERFERENCE))

    NG

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    A000RWME01
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Power Management Control ECU)

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

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      N91-1 (AM22) - Body ground Power switch off 11 to 14 V
      N92-7 (AM21) - Body ground Power switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

    OK

  3. CHECK HARNESS AND CONNECTOR (GROUND)

    A000Q3RE01
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N91-5 (E01) - Body ground Always Below 1 Ω
      N91-6 (E1) - Body ground Always Below 1 Ω
      N92-4 (E12) - Body ground Always Below 1 Ω
      N92-5 (E02) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK PUSH-BUTTON START FUNCTION


    1. Remove the battery from the electrical key transmitter sub-assembly Click here.

    2. A000RCE

      With the brake pedal depressed, hold the electrical key transmitter near the power switch and check if the power source mode changes.

      OK
      The power source mode changes.

      Tech Tips

      If the power source mode changes, the cabin verification is malfunctioning.

      Result
      Result Proceed to
      The power source mode does not change. A
      The power source mode changes. B

    B

    READ VALUE USING GTS (START SWITCH 1, START SWITCH 2) Click here

    A

  5. READ VALUE USING GTS (STOP LIGHT SWITCH 1)


    1. Connect the GTS to the DLC3.

    2. Turn the GTS on.

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

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

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Specified Condition
      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
      ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen.

    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) Click here

    OK

  6. READ VALUE USING GTS (POWER SUPPLY CONDITION)


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

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Power Supply Condition Power supply state/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON

      ALL OFF: Power switch off

      ACC ON: Power switch on (ACC) (ACC relay on)

      IG1 ON: Power switch on (IG) (IG1 relay on)

      IG2 ON: Power switch on (IG) (IG2 relay on)

      ST ON: Sending hybrid control system start request signal

      		 Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time).

    2. With the power switch off and brake pedal depressed, hold the electrical key transmitter sub-assembly near the power switch for 2 seconds or more and read the Data List.

      OK
      IG2 ON is displayed in the Data List.

      Tech Tips

      If the push-button function has been canceled on the customization menu, ACC ON is displayed in the Data List.


    NG

    CHECK FOR DTC Click here

    OK

  7. CHECK POWER MANAGEMENT CONTROL ECU


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

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Power Supply Condition Power supply state/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON

      All OFF: Power switch off (ACC and IG)

      ACC ON: Power switch on (ACC) (ACC relay on)

      IG1 ON: Power switch on (IG) (IG1 relay on)

      IG2 ON: Power switch on (IG) (IG2 relay on)

      ST ON: Sending hybrid control system start request signal

      		 Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time).
    2. A000QLQE02
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

      Measure the voltage while checking the Data List on the GTS.

      Standard Voltage
      Tester Connection Condition Specified Condition
      N92-2 (IG1D) - Body ground Power switch off 1 V or less
      Power switch on (ACC)
      Power switch on (IG) 9 V or higher
      A36-2 (IG2D) - Body ground Power switch off 1 V or less
      Power switch on (ACC)
      Power switch on (IG) 9 V or higher
      N92-1 (ACCD) - Body ground Power switch off 1 V or less
      Power switch on (IG) 8.5 V or higher
      Power switch on (ACC)

    OK

    CHECK RELAY CONTACT SIDE CIRCUIT

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  8. READ VALUE USING GTS (START SWITCH 1, START SWITCH 2)


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

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Start Switch1 Power switch 1 status/ON or OFF

      ON: Power switch pressed

      OFF: Power switch not pressed

      • If the power switch is pressed for a short time, the display may not change.

      • Use this item to determine whether the power switch input signal is malfunctioning.
      Start Switch2 Power switch 2 status/ON or OFF

      ON: Power switch pressed

      OFF: Power switch not pressed

      • Backup for power switch 1. However, when the power switch is pressed and held, the control functions only when both power switch 1 and 2 are normal.

      • Behaves the same way as power switch 1.
      OK
      ON (Power switch is pressed) and OFF (Power switch is not pressed) appear on the screen.
      Result
      Result Proceed to
      NG A
      OK B

    B

    GO TO OTHER FLOWCHART (Room Oscillator does not Recognize Key) Click here

    A

  9. INSPECT POWER SWITCH


    1. Inspect the power switch (See page for 2GR-FXE, Click here for 2AR-FSE).

      Result
      Result Proceed to
      OK A
      NG for 2GR-FXE B
      for 2AR-FSE C

    B

    REPLACE POWER SWITCH Click here

    C

    REPLACE POWER SWITCH Click here

    A

  10. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - POWER SWITCH)


    1. Disconnect the N91 and N92 connectors from the power management control ECU.

    2. Disconnect the N43 connector from the power switch.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N91-7 (SSW1) - N43-5 (SS1) Always Below 1 Ω
      N92-17 (SSW2) - N43-1 (SS2)
      N91-7 (SSW1) or N43-5 (SS1) - Body ground 10 kΩ or higher
      N92-17 (SSW2) or N43-1 (SS2) - Body ground

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Disconnect the A5 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
      N92-10 (STP) - A5-2 (L) Always Below 1 Ω
      N92-10 (STP) or A5-2 (L) - Body ground Always 10 kΩ or higher

    3. Reconnect the A5 stop light switch assembly connector.

    4. A000Q7WE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the 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
      N92-10 (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

  12. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. Inspect the stop light switch assembly Click here.


    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

  13. CHECK FOR DTC


    1. Enter the following menus: Body Electrical / Entry & Start / Trouble Codes.

    2. Check for DTCs.

      Result
      Result Proceed to

      The following DTCs are not output:


      • B2785

      • B2287

      • B2784

      • B278A

      		 A
      DTC B2785 is not output but DTC B2287 is output. B
      DTCs other than B2287 are output. C

    A

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY Click here

    B

    GO TO OTHER FLOWCHART (DTC B2287) Click here

    C

    GO TO OTHER FLOWCHART