INSPECTION PROCEDURE 4: Auto-cruise Control cannot be Set.

COMMENTS ON TROUBLE SYMPTOM

The fail-safe function is probably cancelling auto-cruise control. In this case, M.U.T.-III can be used to Retest each system by checking the diagnosis codes. The M.U.T.-III can also be used to check if the circuits of each input switch are normal or not by checking the input switch codes.

PROBABLE CAUSE

Malfunction of the auto-cruise control switch.
Malfunction of the stop lamp switch.
Malfunction of the clutch switch.
Malfunction of the engine-ECU.

DIAGNOSIS

STEP 1. Check the M.U.T.-III diagnosis code

Q. Is any diagnosis code set?

	Refer to , Check Chart for Diagnosis Codes. Then go to Step 6.

	Go to Step 2.

STEP 2. M.U.T.-III data list

Item 1D: Cancel switch (Refer to data list reference table

Q. Is the check result normal?

	Go to Step 3.

	Refer to , Symptom Procedures number 3. Then go to Step 6.

STEP 3. M.U.T.-III data list

Item 1D: Stop lamp switch (Refer to data list reference table

Q. Is the check result normal?

	Go to Step 4.

	Refer to , Symptom Procedures number 1. Then go to Step 6.

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

Item 1D, Clutch switch (Refer to data list reference table

Q. Is the check result normal?

	Go to Step 5

	Refer to , Symptom Procedures number 2. Then go to Step 6.

STEP 5. Check the symptoms.

Q. Can auto-cruise control be set?

	It can be assumed that this malfunction is intermittent.

	Replace the engine-ECU (Refer to GROUP 13A, Engine-ECU ). Then go to Step 6.

STEP 6. Check the symptoms.

Q. Can auto-cruise control be set?

	The procedure is complete.

	Return to Step 1.