INSPECTION PROCEDURE 5: Hunting (Repeated Acceleration and Deceleration) Occurs at the Set Vehicle Speed.


COMMENTS ON TROUBLE SYMPTOM


The output shaft speed sensor signal or the throttle body is suspected.

PROBABLE CAUSE



DIAGNOSIS

STEP 1. Check the A/T system diagnosis code.

Q. Is any diagnosis code set?
Repair the A/T system (Refer to GROUP 23A, Troubleshooting <A/T> - Check chart for diagnosis codes ). Then go to Step 4.
Go to Step 2.

STEP 2. Check the MPI system diagnosis code.

Q. Is any diagnosis code set?
Repair the MPI control system (Refer to GROUP 13A, Troubleshooting - Inspection chart for diagnosis code Trouble Code Chart ). Then go to Step 4.
Go to Step 3.

STEP 3. Retest the system

Q. Does a hunting occur?
Replace the engine-A/T-ECU (Refer to GROUP 13A, Engine-ECU and Engine-A/T-ECU). Then go to Step 4.
It can be assumed that this malfunction is intermittent.

STEP 4. Retest the system

Q. Does a hunting occur?
Return to Step 1.
The procedure is complete.