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 receives signals to change the power source mode.

Tech Tips

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

WIRING DIAGRAM

A019MXKE05

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC


    1. Connect the intelligent tester to the DLC3.

    2. Turn the intelligent tester on.

    3. Turn on and off any of the door courtesy light switches repeatedly at 1.5-second intervals or less until communication between the tester and vehicle starts.

    4. Enter the following menus: Body / Entry and Start / DTC.

    5. Clear the DTC.

    6. Check for DTCs again.

      OK
      DTCs are not output.

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART

    OK

  2. CHECK ENTRY AND START SYSTEM


    1. A019L51

      Remove the battery of the electrical key transmitter Click here.

    2. Touch the logo side mark of the key or card key to the engine switch.

    3. Check that the engine switch can be turned on (IG).

      OK
      Power source mode can be changed.

    NG

    GO TO OTHER FLOW CHART (ROOM OSCILLATOR DOES NOT RECOGNIZE KEY) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)


    1. A019PLOE08
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the F8 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
      F8-1 (AM22) - Body ground Always 9.5 to 16 V
      F8-2 (AM21) - Body ground Always 9.5 to 16 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)

    OK

  4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)


    1. A019PLOE09
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the F8 connector from the power management control ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F8-5 (GND2) - Body ground Always Below 1 Ω
      F8-6 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

    OK

  5. READ VALUE USING INTELLIGENT TESTER


    1. Reconnect the F8 connector to the power management control ECU.

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

    3. 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 Switch1 Start switch 1/ON or OFF

      ON: Engine switch pushed

      OFF: Engine switch not pushed

      		 -
      Start Switch2 Start switch 2/ON or OFF

      ON: Engine switch pushed

      OFF: Engine switch not pushed

      		 -
      Result
      Result Proceed to
      ON (engine switch is pushed) and OFF (engine switch is not pushed) do not appear on the screen. A
      ON (engine switch is pushed) and OFF (engine switch is not pushed) appear on the screen (for LHD). B
      ON (engine switch is pushed) and OFF (engine switch is not pushed) appear on the screen (for RHD). C

    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    A

  6. INSPECT ENGINE SWITCH


    1. A019JXEE14
      Text in Illustration
      *1

      Component without harness connected

      (Engine Switch)

      Remove the engine switch Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F22-7 (SS1) - F22-5 (GND) Pushed Below 1 Ω
      F22-2 (SS2) - F22-5 (GND) Pushed Below 1 Ω
      F22-7 (SS1) - F22-5 (GND) Not pushed 10 kΩ or higher
      F22-2 (SS2) - F22-5 (GND) Not pushed 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (2GR-FE) B
      NG (1AR-FE) C

    B

    REPLACE ENGINE SWITCH Click here

    C

    REPLACE ENGINE SWITCH Click here

    A

  7. CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - POWER MANAGEMENT CONTROL ECU AND BODY GROUND)


    1. Disconnect the F8 connector from the power management control ECU.

      A019NANE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F22-7 (SS1) - F8-18 (SSW1) Always Below 1 Ω
      F22-7 (SS1) - Body ground Always 10 kΩ or higher
      F22-2 (SS2) - F8-17 (SSW2) Always Below 1 Ω
      F22-2 (SS2) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Engine Switch)

      		 *2

      Front view of wire harness connector

      (to Power Management Control ECU)

    3. Proceed to the next step based on the inspection result.

      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE SWITCH - POWER MANAGEMENT CONTROL ECU OR BODY GROUND)

    A

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here