SMART ENTRY AND START SYSTEM (for Start Function) Power Source Mode does not Change

DESCRIPTION

When the engine switch is pushed with the electrical key in the cabin, the main body ECU 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 main body ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)

WIRING DIAGRAM

A01CCLNE04
A01CG63E09

INSPECTION PROCEDURE

PROCEDURE


  1. 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. Check if the same DTC is output again 5 seconds after the engine switch is turned on (IG).

      OK
      DTCs are not output.

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  2. CHECK SMART ENTRY AND START SYSTEM (ENTRY FUNCTION)


    1. A01CFEHE01

      Remove the battery of the electrical key transmitter Click here.

    2. Hold the key close to the engine switch.

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

      Result
      Inspection Result Proceed to
      Power source mode does not change to on (ACC) A
      Power source mode does not change to on (IG) B
      Power source mode does not change to on (IG or ACC) C
      Power source mode is turned on D

    B

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND) Click here

    C

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND) Click here

    D

    GO TO SMART ENTRY AND START SYSTEM (Room Oscillator does not Recognize Key) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)


    1. Disconnect the G48, G49 and G50 connectors from the main body ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G48-6 (AM1) - Body ground Always 11 to 14 V
      G49-1 (AM2) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      G50-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)

    OK

  4. INSPECT JUNCTION BLOCK ASSEMBLY (ACC , P/POINT RELAY)


    1. A01CCROE16
      Text in Illustration
      *1

      Component without harness connected

      (Junction Block Assembly)

      Disconnect the 5D and 5A connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      5D-3 - 5A-10 Always 135 to 235 Ω at 20°C (68°F)
      5D-3 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for RHD) B
      NG (for LHD) C

    B

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

    C

    REPLACE PASSENGER SIDE JUNCTION BLOCK ASSEMBLY

    A

  5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - JUNCTION BLOCK ASSEMBLY)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G48-22 (ACCD) - 5D-3 Always Below 1 Ω
      G48-22 (ACCD) - Body ground Always 10 kΩ or higher
      5A-10 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - JUNCTION BLOCK ASSEMBLY)

    OK

  6. CHECK MAIN BODY ECU


    1. A01CG1YE04
      Text in Illustration
      *1

      Component without harness connected

      (Main Body ECU)

      Reconnect the G48 connector to the main body ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G48-22 (ACCD) - Body ground Engine switch off → Engine switch on (ACC) Below 1 V → Output voltage is within 2 V of the voltage measured at AM1 or AM2*.

      Tech Tips

      *: Voltage is output only when the engine is cranking.


    NG

    REPLACE MAIN BODY ECU Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)


    1. Disconnect the G48, G49 and G50 connectors from the main body ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G48-6 (AM1) - Body ground Always 11 to 14 V
      G49-1 (AM2) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      G50-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)

    OK

  8. INSPECT IG2 RELAY


    1. A01CDIX

      Remove the IG2 relay from the No. 1 engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 130 to 235 Ω
      3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kΩ or higher
      3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 Ω

    NG

    REPLACE IG2 RELAY

    OK

  9. INSPECT MAIN BODY ECU (LH-IG RELAY)


    1. A01CCROE17
      Text in Illustration
      *1

      Component without harness connected

      (Main Body ECU)

      Disconnect the 4D and 4A connectors from the main body ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4A-5 - 4D-11 Always 130 to 235 Ω at 20°C (68°F)
      4D-11 - Body ground Always 10 kΩ or higher

    NG

    REPLACE MAIN BODY ECU Click here

    OK

  10. INSPECT JUNCTION BLOCK ASSEMBLY (RH-IG RELAY)


    1. A01CCROE18
      Text in Illustration
      *1

      Component without harness connected

      (Junction Block Assembly)

      Disconnect the 5D and 5A connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      5D-7 - 5A-10 Always 130 to 235 Ω at 20°C (68°F)
      5D-7 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for RHD) B
      NG (for LHD) C

    B

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

    C

    REPLACE PASSENGER SIDE JUNCTION BLOCK ASSEMBLY

    A

  11. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - JUNCTION BLOCK, IG2 RELAY)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G48-3 (IG1D) - 5D-7 Always Below 1 Ω
      G48-3 (IG1D) - Body ground Always 10 kΩ or higher
      5D-12 - 4D-11 Always Below 1 Ω
      5D-12 - Body ground Always 10 kΩ or higher
      4A-5 - Body ground Always Below 1 Ω
      5A-10 - Body ground Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G49-11 (IG2D) - No. 1 engine room relay block IG2 relay terminal 1 Always Below 1 Ω
      G49-11 (IG2D) - Body ground Always 10 kΩ or higher
      No. 1 engine room relay block IG2 relay terminal 2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - JUNCTION BLOCK ASSEMBLY)

    OK

  12. CHECK MAIN BODY ECU


    1. Reconnect the G48, G49 and G50 connectors to the main body ECU.

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

      A01CDRGE04
      Standard Voltage
      Tester Connection Condition Specified Condition
      G48-3 (IG1D) - Body ground Engine switch on (IG) Output voltage is within 2 V of the voltage measured at AM1 or AM2.
      G49-11 (IG2D) - Body ground Engine switch on (IG) Output voltage is within 2 V of the voltage measured at AM1 or AM2.
      Text in Illustration
      *1

      Component with harness connected

      (Main Body ECU)

      		 - -

    NG

    REPLACE MAIN BODY ECU Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)


    1. Disconnect the G48, G49 and G50 connectors from the main body ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G48-6 (AM1) - Body ground Always 11 to 14 V
      G49-1 (AM2) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      G50-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)

    OK

  14. INSPECT ENGINE SWITCH


    1. Remove the engine switch (for 2GR-FE: Click here, for 2AZ-FE: Click here.

      A01CCX1E69

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      7 (SS1) - 5 (GND) Pushed Below 1 Ω
      2 (SS2) - 5 (GND) Pushed Below 1 Ω
      7 (SS1) - 5 (GND) Not Pushed 10 kΩ or higher
      2 (SS2) - 5 (GND) Not Pushed 10 kΩ or higher
      Text in Illustration
      *1

      Component without harness connected

      (Engine Switch)

      		 - -
      Result
      Result Proceed to
      OK A
      NG (for 2GR-FE) B
      NG (for 2AZ-FE) C

    B

    REPLACE ENGINE SWITCH (for 2GR-FE) Click here

    C

    REPLACE ENGINE SWITCH (for 2AZ-FE) Click here

    A

  15. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ENGINE SWITCH)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G21-7 (SS1) - G48-17 (SSW1) Always Below 1 Ω
      G21-2 (SS2) - G48-16 (SSW2) Always Below 1 Ω
      G21-5 (GND) - Body ground Always Below 1 Ω
      G21-7 (SS1) or G48-17 (SSW1) - Body ground Always 10 kΩ or higher
      G21-2 (SS2) or G48-16 (SSW2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - ENGINE SWITCH)

    OK

    REPLACE MAIN BODY ECU Click here