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


COMMENTS ON TROUBLE SYMPTOM


The fail-safe function is probably canceling auto-cruise control. In this case, M.U.T.-III can be used to Retest each system by checking the diagnosis trouble 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



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 04: 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
(1)
  • Item 05: Stop lamp switch (Refer to data list reference table ).
  • Item 06: Brake 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 07, Inhibitor 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-A/T-ECU (Refer to GROUP 13A, Engine-ECU and Engine-A/T-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.