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

DESCRIPTION

When the engine switch is pushed with the electrical key in the cabin, the power management control ECU*1 or power source control ECU*2 receives signals to switch the power source mode.

Tech Tips

To allow use of the intelligent tester to inspect the push-button start function when the engine switch is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between the intelligent tester and power management control ECU*1 or power source control ECU*2. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)


WIRING DIAGRAM

A0117LVE01

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    A011B8UE33
    Text in Illustration
    *A for 1KR-FE and 1NR-FE
    *B for 1ND-TV
    *1

    Rear view of wire harness connector

    (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
    *2

    Rear view of wire harness connector

    (to Power Source Control ECU) (for 1ND-TV)

    1. Disconnect the D38 or D73 ECU connector.

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


      1. for 1KR-FE and 1NR-FE

        Standard Voltage
        Tester Connection Condition Specified Condition
        D38-2 (AM21) - Body ground Always 9.5 to 16 V
        D38-1 (AM22) - Body ground

      2. for 1ND-TV

        Standard Voltage
        Tester Connection Condition Specified Condition
        D73-2 (AM21) - Body ground Always 9.5 to 16 V
        D73-1 (AM22) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (GROUND)

    A011B8UE34
    Text in Illustration
    *A for 1KR-FE and 1NR-FE
    *B for 1ND-TV
    *1

    Rear view of wire harness connector

    (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
    *2

    Rear view of wire harness connector

    (to Power Source Control ECU) (for 1ND-TV)

    1. Disconnect the D38 or D73 ECU connector.

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


      1. for 1KR-FE and 1NR-FE

        Standard Resistance
        Tester Connection Condition Specified Condition
        D38-6 (GND) - Body ground Always Below 1 Ω
        D38-5 (GND2) - Body ground

      2. for 1ND-TV

        Standard Resistance
        Tester Connection Condition Specified Condition
        D73-6 (GND) - Body ground Always Below 1 Ω
        D73-5 (GND2) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. READ VALUE USING INTELLIGENT TESTER (KEY CERTIFICATION WAITING TIMED OUT)


    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
      Key Certification Waiting Timed Out Key Certification Waiting Timed Out/YES or NO

      YES: Key Certification Waiting Timed Out matched

      NO: Key Certification Waiting Timed Out differs

      		 -
      OK
      When starting with the power supply in the ALL OFF condition, the ECU data monitor shows that nothing has been detected 1 second after turning the engine switch from off to on (IG).

    NG

    CHECK FOR DTC Click here

    OK

  4. 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 Start Switch 1/ON or OFF

      ON: Engine switch pushed

      OFF: Engine switch not pushed

      		 -
      Start Switch 2 Start Switch 2/ON or OFF

      ON: Engine switch pushed

      OFF: Engine switch not pushed

      		 -
      OK
      The ECU data monitor changes in response to the operation of the engine switch.
      Result
      Result Proceed to
      OK (for 1KR-FE and 1NR-FE) A
      OK (for 1ND-TV) B
      NG C

    B

    INSPECT POWER SOURCE CONTROL ECU Click here

    C

    INSPECT ENGINE SWITCH Click here

    A

  5. INSPECT POWER MANAGEMENT CONTROL ECU


    1. A0118F0E10
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Connect the power management control ECU connectors.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the intelligent tester on.

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

    6. 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

      IG2 ON: IG2 relay on

      ST ON: ST request signal on

      All OFF: All relays off

      IG1 ON: IG1 relay on

      ACC ON: ACC relay on

      		 -

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D38-20 (IG1D) - Body ground Engine switch off Below 1 V
      Engine switch on (ACC)
      Engine switch on (IG) Output voltage at terminal AM21 or AM22 is -2.0 V or more
      D36-8 (IG2D) - Body ground Engine switch off Below 1 V
      Engine switch on (ACC)
      Engine switch on (IG) Output voltage at terminal AM21 or AM22 is -2.0 V or more
      D38-19 (ACCD) - Body ground Engine switch off Below 1 V
      Engine switch on (ACC) Output voltage at terminal AM21 or AM22 is -2.5 V or more
      Engine switch on (IG) Output voltage at terminal AM21 or AM22 is -2.5 V or more

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

  6. CHECK ENGINE SWITCH


    1. Check that the power changes to on (ACC) and on (IG) when operating the engine switch.

      OK
      The power changes to on (ACC) and on (IG) in response to the operation of the engine switch.

    NG

    CHECK HARNESS AND CONNECTOR (BATTERY - RELAY)

    OK

    END

  7. INSPECT ENGINE SWITCH


    1. A011BQQE09
      Text in Illustration
      *1

      Component without harness connected

      (Engine Switch)

      Disconnect the D27 engine switch connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      7 (SS1) - 5 (GND) Engine switch not pushed 10 kΩ or higher
      Engine switch pushed Below 1 Ω
      2 (SS2) - 5 (GND) Engine switch not pushed 10 kΩ or higher
      Engine switch pushed Below 1 Ω

    NG

    REPLACE ENGINE SWITCH

    OK

  8. CHECK HARNESS AND CONNECTOR (ECU - ENGINE SWITCH)


    1. A0117UEE02
      Text in Illustration
      *A for 1KR-FE and 1NR-FE
      *B for 1ND-TV
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
      *2

      Rear view of wire harness connector

      (to Power Source Control ECU) (for 1ND-TV)
      *3

      Rear view of wire harness connector

      (to Engine Switch)

      Disconnect the D38 or D73 ECU connector.

    2. Disconnect the D27 engine switch connector.

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


      1. for 1KR-FE and 1NR-FE

        Standard Resistance
        Tester Connection Condition Specified Condition
        D38-17 (SSW2) - D27-2 (SS2) Always Below 1 Ω
        D38-18 (SSW1) - D27-7 (SS1)
        D38-17 (SSW2) - Body ground Always 10 kΩ or higher
        D38-18 (SSW1) - Body ground
        D27-5 (GND) - Body ground Always Below 1 Ω

      2. for 1ND-TV

        Standard Resistance
        Tester Connection Condition Specified Condition
        D73-17 (SSW2) - D27-2 (SS2) Always Below 1 Ω
        D73-18 (SSW1) - D27-7 (SS1)
        D73-17 (SSW2) - Body ground Always 10 kΩ or higher
        D73-18 (SSW1) - Body ground
        D27-5 (GND) - Body ground Always Below 1 Ω
        Result
        Result Proceed to
        OK (for 1KR-FE and 1NR-FE) A
        OK (for 1ND-TV) B
        NG C

    B

    REPLACE POWER SOURCE CONTROL ECU Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  9. CHECK FOR DTC


    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 / DTC.

    5. Read the DTC.

    6. Enter the following menus: Body / Entry & Start / DTC.

    7. Read the DTC.

      Result
      Result Proceed to

      None of the following DTCs are output.

      B2785 Communication Malfunction between ECUs Connected by LIN

      B2287 LIN Communication Master Malfunction

      B2784 Antenna Coil Open/Short

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

    B

    GO TO DTC (B2287) Click here

    C

    GO TO DTC CHART Click here

    A

    GO TO ENTRY AND START SYSTEM (FOR ENTRY FUNCTION) Click here

  10. INSPECT POWER SOURCE CONTROL ECU


    1. A0118F0E11
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Source Control ECU)

      Connect the power source control ECU connectors.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the intelligent tester on.

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

    6. 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

      IG2 ON: IG2 relay on

      ST ON: ST request signal on

      All OFF: All relays off

      IG1 ON: IG1 relay on

      ACC ON: ACC relay on

      		 -

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D73-20 (IG1D) - Body ground Engine switch off Below 1 V
      Engine switch on (ACC)
      Engine switch on (IG) Output voltage at terminal AM21 or AM22 is -2.0 V or more
      D72-8 (IG2D) - Body ground Engine switch off Below 1 V
      Engine switch on (ACC)
      Engine switch on (IG) Output voltage at terminal AM21 or AM22 is -2.0 V or more
      D73-19 (ACCD) - Body ground Engine switch off Below 1 V
      Engine switch on (ACC) Output voltage at terminal AM21 or AM22 is -2.5 V or more
      Engine switch on (IG) Output voltage at terminal AM21 or AM22 is -2.5 V or more

    NG

    REPLACE POWER SOURCE CONTROL ECU Click here

    OK

  11. CHECK ENGINE SWITCH


    1. Check that the power changes to on (ACC) and on (IG) when operating the engine switch.

      OK
      The power changes to on (ACC) and on (IG) in response to the operation of the engine switch.

    NG

    CHECK HARNESS AND CONNECTOR (BATTERY - RELAY)

    OK

    END