ENTRY AND START SYSTEM(for Start Function) 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 battery cable is disconnected and reconnected, the power source returns to the mode it was in before the battery cable was disconnected.

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

  • Latch Circuit

  • IG1 Relay Monitor(Outside)

  • IG1 Relay Monitor(Inside)

  • IG2 Relay Monitor(Outside)

  • IG2 Relay Monitor(Inside)

  • ACC Relay Monitor

  • Power Supply Condition


    Starting Control

  • Ignition

 -

WIRING DIAGRAM

A01VHXME05

CAUTION / NOTICE / HINT

Note


  • When using the intelligent tester with the engine switch off to troubleshoot:

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

  • The entry and start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting Click here.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) Click here.

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

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

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

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

PROCEDURE


  1. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM (OPERATION)


    1. Check that the wireless door lock functions operate normally Click here.

      OK
      Wireless door lock functions operate normally.

    NG

    GO TO ENTRY AND START SYSTEM (ALL DOOR ENTRY LOCK/UNLOCK FUNCTIONS AND WIRELESS FUNCTIONS DO NOT OPERATE) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    A01VFDXE01
    Text in Illustration
    *a

    Rear view of harness connected

    (to Certification ECU (Smart Key ECU Assembly))

    1. Disconnect the F65 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
      F65-2 (+B) - Body ground Always 9.5 to 16 V

    NG

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

    OK

  3. CHECK HARNESS AND CONNECTOR (GROUND)

    A01VH3AE01
    Text in Illustration
    *a

    Rear view of harness connected

    (to Certification ECU (Smart Key ECU Assembly))

    1. Disconnect the F65 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 Specified Condition
      F65-11 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK ENTRY AND START SYSTEM


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

    2. A01VKZ9

      With the brake pedal*1 or clutch pedal*2 depressed, touch the electrical key transmitter sub-assembly to the engine switch while facing the logo side of the electrical key transmitter sub-assembly to the engine switch.


      • *1: for CVT

      • *2: for Manual Transaxle

    3. When touching the logo of the electrical key transmitter sub-assembly to the engine switch, check whether the power source mode changes.

      OK
      Power source mode changes.

      Tech Tips

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

      Result
      Result Proceed to
      NG (Power source mode does not change) A
      OK (Power source mode changes) B

    B

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

    A

  5. READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH, NEUTRAL SW/CLUTCH SW)


    1. for CVT


      1. Connect the intelligent tester to the DLC3.

      2. Turn the engine switch on (IG).

      3. Turn the intelligent tester on.

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

      5. According to the display on the intelligent tester, read the Data List.

        Power Source Control
        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 engine cannot be started when this item is "OFF".

        • When this item is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.
        OK
        ON (brake pedal depressed) and OFF (brake pedal released) appear on the screen according to the stop light switch condition.

    2. for Manual Transaxle


      1. Connect the intelligent tester to the DLC3.

      2. Turn the engine switch on (IG).

      3. Turn the intelligent tester on.

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

      5. According to the display on the intelligent tester, read the Data List.

        Power Source Control
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Neutral SW / Clutch SW State of clutch pedal / OFF or ON

        OFF: Clutch pedal released

        ON: Clutch pedal depressed

        • Use this item to help determine if the clutch switch is malfunctioning.

        • The engine cannot be started when this item is "OFF".
        OK
        ON (clutch pedal depressed) and OFF (clutch pedal released) appear on the screen according to the stop light switch condition.
        Result
        Result Proceed to
        OK A
        NG (for CVT) B
        NG (for Manual Transaxle) C

    B

    SYSTEM CHECK Click here

    C

    INSPECT CLUTCH START SWITCH ASSEMBLY Click here

    A

  6. READ VALUE USING INTELLIGENT TESTER (POWER SUPPLY CONDITION)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

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

    5. According to the display on the intelligent tester, read the Data List.

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

      All OFF: Engine switch off (ACC and IG)

      ACC ON: Engine switch on (ACC))

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

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

      ST ON: Sending engine start request signal

      		 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).
      OK
      Display changes according to the changes in the power source mode when the engine switch is pushed.

    NG

    CHECK FOR DTC Click here

    OK

  7. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

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

    5. According to the display on the intelligent tester, read the Data List.

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

      All OFF: Engine switch off (ACC and IG)

      ACC ON: Engine switch on (ACC))

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

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

      ST ON: Sending engine start request signal

      		 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).

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

      A01VGVLE01
      Text in Illustration
      *a

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

      		 - -
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F63-6 (IG1D) - Body ground Engine switch off 1 V or less
      Engine switch on (ACC) 1 V or less
      Engine switch on (IG) 9 V or higher
      F65-9 (IG2D) - Body ground Engine switch off 1 V or less
      Engine switch on (ACC) 1 V or less
      Engine switch on (IG) 9 V or higher
      F63-4 (ACCD) - Body ground Engine switch off 1 V or less
      Engine switch on (ACC) 8.5 V or higher
      Engine switch on (IG) 8.5 V or higher

    OK

    CHECK RELAY CONTACT SIDE CIRCUIT Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  8. SYSTEM CHECK


    1. Check the vehicle specifications.

      Result
      Result Proceed to
      for LED Type Stop Light A
      for Bulb Type Stop Light B

    B

    INSPECT STOP LIGHT SWITCH ASSEMBLY Click here

    A

  9. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER SOURCE AND BODY GROUND)


    1. A01VJ24E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

      Disconnect the stop light switch assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A101-1 (B) - A101-3 (GND) Engine switch off 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      A101-3 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. A01VGJGE01
      Text in Illustration
      *a

      Component with harness connected

      (Stop Light Switch Assembly)

      Reconnect the stop light switch assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A101-2 (L) - A101-3 (GND) Engine switch off, Brake pedal not depressed Below 1V
      A101-2 (L) - A101-3 (GND) Engine switch off, Brake pedal depressed 11 to 14 V

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the F65 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A101*1 or A89*2 stop light switch assembly connector.


      • *1: for LED Type Stop Light

      • *2: for Bulb Type Stop Light

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

      Standard Resistance
      for LED Type Stop Light
      Tester Connection Condition Specified Condition
      F65-18 (STP1) - A101-2 (L) Always Below 1 Ω
      F65-18 (STP1) - Body ground Always 10 kΩ or higher
      for Bulb Type Stop Light
      Tester Connection Condition Specified Condition
      F65-18 (STP1) - A89-1 Always Below 1 Ω
      F65-18 (STP1) - Body ground Always 10 kΩ or higher

    4. Reconnect the A101*1 or A89*2 stop light switch assembly connector.


      • *1: for LED Type Stop Light

      • *2: for Bulb Type Stop Light

    5. A01VIFAE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (Certification ECU (Smart Key ECU Assembly))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F65-18 (STP1) - Body ground Brake pedal released Below 1 V
      Brake pedal depressed 9 V or higher

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. Inspect the stop light switch assembly Click here.


    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the F65 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A101*1 or A89*2 stop light switch assembly connector.


      • *1: for LED Type Stop Light

      • *2: for Bulb Type Stop Light

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

      Standard Resistance
      for LED Type Stop Light
      Tester Connection Condition Specified Condition
      F65-18 (STP1) - A101-2 (L) Always Below 1 Ω
      F65-18 (STP1) - Body ground Always 10 kΩ or higher
      for Bulb Type Stop Light
      Tester Connection Condition Specified Condition
      F65-18 (STP1) - A89-1 Always Below 1 Ω
      F65-18 (STP1) - Body ground Always 10 kΩ or higher

    4. Reconnect the A101*1 or A89*2 stop light switch assembly connector.


      • *1: for LED Type Stop Light

      • *2: for Bulb Type Stop Light

    5. A01VIFAE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (Certification ECU (Smart Key ECU Assembly))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F65-18 (STP1) - Body ground Brake pedal released Below 1 V
      Brake pedal depressed 9 V or higher

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch assembly Click here.


    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    OK

  15. INSPECT ST RELAY


    1. Inspect the ST Relay.



    NG

    REPLACE ST RELAY

    OK

  16. CHECK HARNESS AND CONNECTOR


    1. A01VFQTE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

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

    2. Depress the clutch pedal.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F65-5 (STAR) - Body ground 20°C (68°F) 93.75 to 136.36 Ω

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  17. CHECK FOR DTC


    1. Check the DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC B2784 is output B
      DTC B2785 is output C

    A

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART (B2784) Click here

    C

    GO TO DIAGNOSTIC TROUBLE CODE CHART (B2785) Click here

  18. READ VALUE USING INTELLIGENT TESTER (START SWITCH 1, 2)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

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

    5. According to the display on the intelligent tester, read the Data List.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Start Switch 1 Condition of engine switch contact 1 / OFF or ON

      OFF: Engine switch not pushed

      ON: Engine switch pushed

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

      • Use this item to determine whether the engine switch input signal is malfunctioning.
      Start Switch 2 Condition of engine switch contact 2 / OFF or ON

      OFF: Engine switch not pushed

      ON : Engine switch pushed

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

      • Behaves the same way as engine switch 1.
      OK
      The ECU data monitor changes in response to the operation of the engine switch.
      Result
      Result Proceed to
      NG A
      OK B

    B

    GO TO ENTRY AND START SYSTEM (FOR ENTRY FUNCTION) (ROOM OSCILLATOR DOES NOT RECOGNIZE KEY) Click here

    A

  19. INSPECT ENGINE SWITCH


    1. Inspect the engine switch Click here.

      Result
      Result Proceed to
      OK A
      NG (for 1KR-FE) B
      NG (for 1NR-FE) C
      NG (for 1ND-TV) D

    B

    REPLACE ENGINE SWITCH Click here

    C

    REPLACE ENGINE SWITCH Click here

    D

    REPLACE ENGINE SWITCH Click here

    A

  20. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE SWITCH)


    1. Disconnect the F63 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the F59 engine switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F63-28 (SSW1) - F59-5 (SS1) Always Below 1 Ω
      F63-30 (SSW2) - F59-1 (SS2) Always Below 1 Ω
      F63-28 (SSW1) or F59-5 (SS1) - Body ground Always 10 kΩ or higher
      F63-30 (SSW2) or F59-1 (SS2) - Body ground Always 10 kΩ or higher

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR