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 power source control 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 the power source control ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)

WIRING DIAGRAM

A015ZBCE04
A015YQIE04

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Check if the trouble occurs again 5 seconds after the engine switch on (IG).

      OK
      DTC is not output.

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

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


    1. A0162C4E05

      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).

      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 and ACC) C
      Power source mode is turned on D

    B

    INSPECT FUSE (AM2 FUSE) Click here

    C

    INSPECT FUSE Click here

    D

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

    A

  3. INSPECT FUSE (AM2)


    1. Remove the AM2 fuse from the main body ECU RH (cowl side junction block RH).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      AM2 fuse Always Below 1Ω

    NG

    REPLACE AM2 FUSE

    OK

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


    1. A0162Y6E01

      Disconnect the J55 connector from power source control ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J55-33 (AM1) - Body ground Always 11 to 14 V
      J55-12 (AM2) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      J55-6 (GND) - Body ground Always Below 1Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND)

    OK

  5. CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)


    1. A0161SWE08

      Disconnect the RD and RA connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      RD-2 - RA-5 Always 68 to 250 Ω at 20 °C
      RD-2 or RA-5 - Body ground Always 10 k Ω or higher

    NG

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK RH)

    OK

  6. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - MAIN BODY ECU RH)


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

      A01616VE06
      Standard Resistance
      Tester Connection Condition Specified Condition
      J55-11 (ACCD) - RD-2 Always Below 1Ω
      J55-11 (ACCR) or RD-2 - Body ground Always 10 k Ω or higher
      RA-5 - Body ground Always Below 1Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - MAIN BODY ECU RH)

    OK

  7. CHECK POWER SOURCE CONTROL ECU


    1. A015YHVE37

      Reconnect the connector J55 to the power source control ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J55-11 (ACCD) - RD-2 Always 0.1 to 0.88 V*1 → output voltage at terminal AM1 or AM2 is -2 V or more.

      Tech Tips

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


    NG

    REPLACE POWER SOURCE CONTROL ECU

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. INSPECT FUSE (AM2 FUSE)


    1. Remove the AM2 fuse from the main body ECU RH (cowl side junction block RH).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      AM2 fuse Always Below 1Ω

    NG

    REPLACE AM2 FUSE

    OK

  9. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND)


    1. A0162Y6E08

      Disconnect the J55 connector from power source control ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J55-33 (AM1) - Body ground Always 11 to 14 V
      J55-12 (AM2) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      J55-6 (GND2) - Body ground Always Below 1Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND)

    OK

  10. CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)


    1. A0161SWE05

      Disconnect the RD and RA connector from the main body ECU RH (cowl side junction block RH).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      RD-6 - RA-5 Always 136 to 250 Ω at 20°C (68°F)
      RD-6 - RD-12 Always Below1Ω
      RD-6 or RD-12 - Body ground Always 10 k Ω or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)


    1. A0162M4E03

      Disconnect the LD connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      LD-13 - LD-8 Always 136 to 250 Ω at 20°C (68°F)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. INSPECT IG2 RELAY


    1. A0161LX

      Remove the IG2 relay from Engine Room Relay Block No. 2.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 When battery voltage is not applied to terminal 1 and 2 10 k Ω or higher
      3 - 5 When battery voltage is applied to terminal 1 and 2 Below 1 Ω

    NG

    REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)

    OK

  13. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - MAIN BODY ECU LH AND BODY GROUND)


    1. A015YOZE08

      Disconnect the RA connector from main body ECU RH (Cowl side junction block RH).

      Standard Resistance
      Tester Connection Condition Specified Condition
      J55-11 (ACCD) - RD-2 Always Below 1 Ω
      J55-11 (ACCD) or RD-2 - Body ground Always 10 k Ω or higher
      RA-5 or RD-7 - Body ground Always Below 1Ω

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


    NG

    REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)

    OK

  14. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK RH - COWL SIDE JUNCTION BLOCK LH)


    1. A016367E05

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      RD-12 - LD-13 Always Below 1 Ω
      RD-12 or LD-13 - Body ground Always 10 k Ω or higher
      LD-8 - Body ground Always Below 1 Ω

    NG

    REPLACE IG2 RELAY

    OK

  15. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - ENGINE ROOM RELAY BLOCK NO. 2)


    1. A0161LX

      Remove the IG2 relay from engine room relay block No. 2.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J55-34 (IG1D) - Engine room relay block No. 2 IG2 relay terminal 2 Always Below 1 Ω
      J55-34 (IG1D) or Engine room relay block No. 2 IG2 relay terminal 2 - Body ground Always 10 k Ω or higher
      Engine room relay block No. 2 IG2 relay terminal 1 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. CHECK POWER SOURCE CONTROL ECU


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND)

    OK

    REPLACE POWER SOURCE CONTROL ECU

  17. INSPECT FUSE


    1. Remove the AM2 fuse from the main body ECU RH (cowl side junction block RH).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      AM2 fuse Always Below 1Ω

    NG

    REPLACE AM2 FUSE

    OK

  18. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND)


    1. A0162Y6E07

      Disconnect the J55 connector from the power source control ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J55-11 (ACCD) - RD-2 Always 0.1 to 0.88 V*1 → output voltage at terminal AM1 or AM2 is -2 V or more.

      Tech Tips

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND)

    OK

  19. INSPECT PUSH START SWITCH


    1. Remove the engine switch Click here.

      A015Z34E41

    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

    NG

    REPLACE ENGINE SWITCH Click here

    OK

  20. CHECK HARNESS AND CONNECTOR


    1. A0162GUE15

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J31-7 (SS1) - J55-14 (SSW1) Always Below 1 Ω
      J31-2 (SS2) - J55-37 (SSW2) Always Below 1 Ω
      J31-5 (GND) - Body ground Always Below 1Ω
      J31-7 (SS1) or J54-14 (SSW1) - Body ground Always 10 kΩ or higher
      J31-2 (SS2) or J55-37 (SSW2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - ENGINE SWITCH)

    OK

    REPLACE POWER SOURCE CONTROL ECU