Inspection Procedure 6: AS&G System Abnormal (auto start not carried out)



caution If the following motions are carried out during the auto stop even one time, the AS&G-ECU blinks the AS&G indicator/display in the combination meter and prohibits the auto start. Even if trying to return to the previous status after that, the auto start is prohibited. When restarted, the engine must be started by the key.

  • In case the hood is opened
  • In case the driver’s seat belt is unfastened
  • In case the driver’s door is opened

FUNCTION


When the driver depresses the clutch pedal during the auto stop, the AS&G-ECU should send the engine start request signal to the engine-ECU via CAN. When receiving the signal, the engine-ECU should start the engine.

COMMENTS ON TROUBLE SYMPTOM


The failure could possibly be caused by the failed AS&G system. The AS&G-ECU, however, can possibly prohibit the auto start, depending on the vehicle status or the ambient conditions.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Confirm the vehicle status and the ambient conditions.



  • Confirm the vehicle status or the ambient conditions to check whether the auto start should be carried out or not (Refer to ).

Q. Are the conditions for prohibiting the auto start satisfied?

Check end.
Go to Step 2.

STEP 2. M.U.T.-III diagnosis code



  • Confirm the diagnosis code is set from the AS&G-ECU.

Q. Is the diagnosis code set?

Refer to Diagnosis Code Chart .
Go to Step 3

STEP 3. M.U.T.-III diagnosis code



  • Confirm the diagnosis code is set from the engine-ECU.

Q. Is the diagnosis code set?

Perform the troubleshooting of the engine-ECU (Refer to GROUP 13C - Troubleshooting - Inspection Chart for Diagnosis Code <4J1>, Refer to GROUP 13D - Troubleshooting - Inspection Chart for Diagnosis Code <4N1>).
Go to Step 4.

STEP 4. M.U.T.-III data list



  • Item 10: Seat belt fasten status
OK:
    Fastened (Driver’s seat belt: Fastened)
    Not fastened (Driver’s seat belt: Not fastened)
note If the driver’s seat belt is unfastened, the AS&G indicator/display in the combination meter should blink.

Q. Is the check result normal?

Go to Step 5.
Perform the troubleshooting of the seat belt reminder function circuit (Refer to GROUP 54A - Combination Meter - Symptom Procedures - Seat Belt Reminder Function Does Not Work Normally ).

STEP 5. M.U.T.-III data list



  • Item 35: Driver’s side door SW
OK:
    Open (Driver’s side door: Opened)
    Close (Driver’s side door: Closed)
note If the driver’s side door is opened, the AS&G indicator/display in the combination meter should blink.

Q. Is the check result normal?

Go to Step 6.
Perform the troubleshooting of the driver’s side door switch circuit (Refer to GROUP 54A - ETACS - Input Signal Procedures - The Front Door Switch (Driver’s Side) Signal is not Sent to The ETACS-ECU).

STEP 6. M.U.T.-III data list



  • Item 4: Engine hood
OK:
    Close (Hood: Closed)
    Open (Hood: Opened)
note If the engine hood is opened, the AS&G indicator/display in the combination meter should blink.

Q. Is the check result normal?

Go to Step 7.
Perform the troubleshooting of the engine hood latch switch circuit (Refer to GROUP 54A - ETACS - Input Signal Procedures - The hood latch switch signal is not received ).

STEP 7. M.U.T.-III data list



  • Refer to Data List Reference Table .

  1. Item 6: Clutch monitoring switch (upper)
  2. Item 7: Clutch interlock switch (bottom)
  3. Item 8: Neutral position switch

Q. Are the check results normal?

Go to Step 8.
Perform the troubleshooting for the item that has an abnormal value (Refer to ).

STEP 8. M.U.T.-III data list



  • Refer to Data List Reference Table .

  1. Item 18: Accelerator pedal position

Q. Is the check result normal?

Go to Step 9.
Perform the troubleshooting of the accelerator pedal position sensor (Refer to GROUP 13C - Troubleshooting - Inspection Chart for Diagnosis Code <4J1>, Refer to GROUP 13D - Troubleshooting - Inspection Chart for Diagnosis Code <4N1>).

STEP 9. Check the trouble symptom.


Q. Does the trouble symptom persist?

Replace the AS&G-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).