Inspection Procedure 30: Although Auto Stop & Go (AS&G) OFF Switch Pressed, AS&G OFF Indicator Lamp Not Lit <Vehicles with AS&G system>




OPERATION



COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Connector check: B-29 AS&G OFF switch connector

Q. Is the check result normal?

Go to Step 2 .

Repair or replace the connector.

STEP 2. Check AS&G OFF switch.

  • Check AS&G OFF switch (Refer to ).

Q. Is the check result normal?
Go to Step 3 .
Replace the AS&G OFF switch.

STEP 3. Perform voltage measurement at B-29 AS&G OFF switch connector.


  • Disconnect connector, and measure at the harness side.
  • Ignition switch: ON
  • Voltage between terminal No. 1 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 5 .

Go to Step 4 .

STEP 4. Connector check: B-240 ignition switch connector


Q. Is the check result normal?


    Check intermediate connectors B-26, B-231, and B-229, and repair if necessary. If intermediate connectors are normal, check and repair harness between B-240 (terminal No. 2) ignition switch connector and B-29 (terminal No. 1) AS&G OFF switch connector.

    • Check power supply line for open/short circuit.

Repair or replace the connector.

STEP 5. Connector check: A-09 engine-ECU connector

Q. Is the check result normal?

Go to Step 6 .

Repair or replace the connector.

STEP 6. Perform voltage measurement at A-09 engine-ECU connector.



  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal No. 91 and earth.
OK:
    System voltage (AS&G OFF switch: ON)
    1 V or less (AS&G OFF switch: OFF)

Q. Is the check result normal?

Go to Step 7 .


    Check intermediate connector B-117, and repair if necessary. If intermediate connector is normal, check and repair harness between A-09 (terminal No. 91) engine-ECU connector and B-29 (terminal No. 2) AS&G OFF switch connector.

    • Check output line for open/short circuit.

STEP 7. Connector check: B-240 ignition switch connector

Q. Is the check result normal?

Go to Step 8 .

Repair or replace the connector.

STEP 8. Check harness between B-240 (terminal No. 2) ignition switch connector and B-29 (terminal No. 1) AS&G OFF switch connector.


note Before checking harness, check intermediate connectors B-229, B-231 and B-26, and repair if necessary.

  • Check power supply line for damage.

Q. Is the check result normal?

Go to Step 9 .

Repair the damaged harness wire.

STEP 9. Connector check: A-09 engine-ECU connector

Q. Is the check result normal?

Go to Step 10 .

Repair or replace the connector.

STEP 10. Check harness between A-09 (terminal No. 91) engine-ECU connector and B-29 (terminal No. 2) AS&G OFF switch connector.


note Before checking harness, check intermediate connector B-117 and repair if necessary.

  • Check output line for short circuit.

Q. Is the check result normal?

Go to Step 11 .

Repair the damaged harness wire.

STEP 11 Check the trouble symptoms.

Q. Does trouble symptom persist?
Replace the engine-ECU then perform the variant coding (Refer to GROUP 00 - Precautions Before Service - How to Perform Variant Coding ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).