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.


WIRING DIAGRAM

A01KTF6E02
A01KRZWE18
*a Integration Relay
*b Certification ECU (Smart Key ECU Assembly)

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 Click here. Troubleshoot the push-button start after confirming that the communication systems are functioning properly.

  • Before replacing the certification ECU (smart key ECU assembly) or electrical key transmitter sub-assembly, refer to Service Bulletin.

    Click here

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

    Click here

  • If the entry and start system (for Start Function) is disabled through the customize function, enable the system before performing troubleshooting.

    Click here

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

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

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 (IG) or on (ACC)

    Power Source Control

  • 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

 -

PROCEDURE


  1. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM


    1. Check the wireless door lock function by operating the electrical key transmitter sub-assembly.

      Click here

      OK
      Wireless door lock function operates.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO OTHER DIAGNOSTIC PROCEDURE (All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    Result
    Proceed to
    OK
    NG

    1. A01KSZDC62
      *a

      Rear view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the E33 certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E33-2 (+B) - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  3. CHECK HARNESS AND CONNECTOR (GROUND)

    Result
    Proceed to
    OK
    NG

    1. A01KSZDC63
      *a

      Rear view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E33-11 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK ENTRY AND START SYSTEM


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

      Click here

    2. A01KRJLC01
      *1 Power Switch
      *2 Electrical Key Transmitter Sub-assembly

      With the brake pedal depressed, hold the electrical key transmitter sub-assembly 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 SWITCH1, START SWITCH2) Click here

    A

  5. READ VALUE USING GTS (STOP LIGHT SWITCH1)


    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.


      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.

      • 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.

      Body Electrical > Power Source Control > Data List
      Tester Display
      Stop Light Switch1
      OK
      The GTS display changes correctly in response to the brake pedal operation.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT STOP LP RELAY Click here

    OK

  6. READ VALUE USING GTS (POWER SUPPLY CONDITION)


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

    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.


      Body Electrical > Power Source Control > Data List
      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)

      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).

      Body Electrical > Power Source Control > Data List
      Tester Display
      Power Supply Condition
      OK
      IG2 ON is displayed on the GTS screen.

      Tech Tips

      If the entry and start system (for Start Function) has been canceled on the customization menu, ACC ON is displayed on the GTS screen.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK FOR DTC Click here

    OK

  7. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. 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
      Power Supply Condition State of power supply IG2 ON, ST ON, All OFF, IG1 ON or ACC ON

      All OFF: Power switch off (power supply 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: Starting hybrid control system

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

      Body Electrical > Power Source Control > Data List
      Tester Display
      Power Supply Condition

    2. Measure the voltage while reading the Data List on the GTS.

      A01KTA0C78
      *a

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

      		 - -
      Standard Voltage
      Tester Connection Condition Specified Condition
      E35-6 (IG1D) - Body ground Power switch off 1 V or less
      Power switch on (ACC) 1 V or less
      Power switch on (IG) 9 V or higher
      E33-9 (IG2D) - Body ground Power switch off 1 V or less
      Power switch on (ACC) 1 V or less
      Power switch on (IG) 9 V or higher
      E35-4 (ACCD) - Body ground Power switch off 1 V or less
      Power switch on (IG) 8.5 V or higher
      Power switch on (ACC) 8.5 V or higher
      Result
      Proceed to
      OK
      NG

    OK

    CHECK RELAY CONTACT SIDE CIRCUIT

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  8. CHECK FOR DTC


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


      Body Electrical > Entry&Start > Trouble Codes

    2. Check for DTCs.

      Result
      Result Proceed to

      The following DTCs are not output:


      • B2784

      • B278A

      		 A

      The following DTCs are output:


      • B2784

      • B278A

      		 B

    A

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

  9. INSPECT STOP LP RELAY


    1. Remove the STOP LP relay.

    2. Inspect the STOP LP relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STOP LP RELAY

    OK

  10. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

    Result
    Proceed to
    OK
    NG

    1. Disconnect the E33 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A1 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E33-18 (STP1) - A1-1 Always Below 1 Ω
      E33-18 (STP1) or A1-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. Remove the stop light switch assembly.

      Click here

    2. Inspect the stop light switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

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

    Result
    Proceed to
    OK
    NG

    1. Disconnect the E33 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A1 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E33-18 (STP1) - A1-1 Always Below 1 Ω
      E33-18 (STP1) or A1-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. READ VALUE USING GTS (START SWITCH1, START SWITCH2)


    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.


      Body Electrical > Power Source Control > Data List
      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.

      Body Electrical > Power Source Control > Data List
      Tester Display
      Start Switch1
      Start Switch2
      OK
      The GTS display changes correctly in response to the power switch operation.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  14. INSPECT POWER SWITCH


    1. Remove the power switch.

      Click here

    2. Inspect the power switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE POWER SWITCH Click here

    OK

  15. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - POWER SWITCH)


    1. Disconnect the E35 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Always
      E35-28 (SSW1) - E36-5 (SS1) Always Below 1 Ω
      E35-30 (SSW2) - E36-1 (SS2) Always Below 1 Ω
      E35-28 (SSW1) or E36-5 (SS1) - Body ground Always 10 kΩ or higher
      E35-30 (SSW2) or E36-1 (SS2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR