ENTRY AND START SYSTEM(for Start Function) Power Source Mode does not Change to ON (IG and ACC)

DESCRIPTION

The certification ECU (the smart key ECU assembly) receives a signal and switches the power source mode in the following operations.



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.

WIRING DIAGRAM

A005HOHE02

CAUTION / NOTICE / HINT

Note


  • When using the intelligent tester with the engine 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 intelligent tester and vehicle begins, or 2) connect the intelligent tester to the vehicle and select "Manual" from the initial screen on the intelligent tester. Select "KEY REGIST" under Model Code.

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

  • 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.

  • If the entry and start system 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 inspection procedure.

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

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

  • 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

 -

PROCEDURE


  1. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM (OPERATION)


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

      OK
      Wireless door lock functions operate normally.

    NG

    GO TO ENTRY AND START SYSTEM (for Entry Function) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    A005GV2E01
    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)


    1. 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 Click here.

    2. A005HBO

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


      • *1: for CVT

      • *2: for Manual Transaxle

    3. When touch the logo of the electrical key transmitter to the engine switch, check whether the power source mode changes.

      OK
      Power source mode changes.

      Tech Tips


      • When the electrical key transmitter cannot be verified even though it is within the specified range, the power source mode changes check can be performed by removing the transmitter battery from the electrical key transmitter and holding the transmitter close to the engine switch.

      • When performing the check, if the power source mode changes, there is a problem with key certification inside the cabin.

      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. Read the Data List according to the display on the intelligent tester.

        Power Source Control
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Stop Light Switch 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 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. Read the Data List according to the display on the intelligent tester.

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

        ON: Clutch pedal depressed

        OFF: Clutch pedal released

        • 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

    INSPECT STOP LIGHT SWITCH ASSEMBLY 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. Read the Data List according to the display on the intelligent tester.

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

      All OFF: Engine switch off (power supply off)

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

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

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

      ST ON: Cranking engine (ST request signal on)

      		 - 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. Read the Data List according to the display on the intelligent tester.

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

      All OFF: Engine switch off (power supply off)

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

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

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

      ST ON: Cranking engine (ST request signal on)

      		 - 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.

      A005MBXE01
      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
      Engine switch on (IG)*2 9 V or higher
      F65-9 (IG2D) - Body ground Engine switch off 1 V or less
      Engine switch on (ACC)*1
      Engine switch on (IG)*2 9 V or higher
      F63-4 (ACCD) - Body ground Engine switch off 1 V or less
      Engine switch on (ACC)*1 8.5 V or higher
      Engine switch on (IG)*2 8.5 V or higher

      Tech Tips

      *1: To turn the engine switch on (ACC), carry the key and press the engine switch with the shift lever in P or N (for CVT) and the brake pedal (for CVT) or clutch pedal (for Manual Transaxle) released.

      *2: To turn the engine switch on (IG), carry the key and press the engine switch twice with the shift lever in P or N (for CVT) and the brake pedal (for CVT) or clutch pedal (for Manual Transaxle) released.


    OK

    CHECK RELAY CONTACT SIDE CIRCUIT Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  8. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. Inspect the stop light switch assembly Click here.


    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

  9. 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 A76 stop light switch assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      F65-18 (STP1) - A76-2 (L) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F65-18 (STP1) or A76-2 (L) - Body ground Always 10 kΩ or higher

    4. Reconnect the A76 stop light switch assembly connector.

    5. A005I54E01
      Text in Illustration
      *a

      Component without wire harness connected

      (to Certification ECU (Smart Key ECU Assembly))

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

      Standard Voltage
      Tester Connection Brake Pedal Operation Specified Condition
      F65-18 (STP1) - Body ground Released Below 1 V
      Depressed 9 V or higher

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Remove the clutch start switch assembly Click here.

    2. Inspect the clutch start switch assembly Click here.


    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    OK

  11. INSPECT ST RELAY


    1. for 1NZ-FE


      1. Remove the ST2 relay from the engine room relay block.

      2. Remove the ST/MGC relay from the No. 2 engine room relay block.

      3. Inspect the ST2 relay and ST/MGC relay Click here.

    2. except 1NZ-FE


      1. Remove the ST relay from the engine room relay block.

      2. Inspect the ST relay.



    NG

    REPLACE ST RELAY

    OK

  12. CHECK HARNESS AND CONNECTOR


    1. A005GD6E01
      Text in Illustration
      *a

      Component without harness connected

      (Certification ECU (Smart Key ECU Assembly))

      Disconnect the F65 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

  13. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Recheck for 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 Click here

    C

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

  14. 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. Read the Data List according to the display on the intelligent tester.

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

      ON: Engine switch pushed

      OFF: Engine switch not 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 / ON or OFF

      ON : Engine switch pushed

      OFF: Engine switch not pushed

      • This is the backup for engine switch 1.

      • 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) Click here

    A

  15. INSPECT ENGINE SWITCH


    1. Remove the engine switch.


    2. Inspect the engine switch.


      Result
      Result Proceed to
      OK A
      NG (for 1NZ-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

  16. 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 (Check for Open)
      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
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F63-28 (SSW1) - Body ground Always 10 kΩ or higher
      F63-30 (SSW2) - Body ground Always 10 kΩ or higher

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR