[17] ENGINE AND EMISSION CONTROL - - AUTO-CRUISE CONTROL <4G69-VEHICLES WITH AUTO-CRUISE CONTROL SYSTEM> - SYMPTOM PROCEDURES - Inspection Procedure 4: Auto-cruise Control cannot be Set. | PRINT PAGE / INDEX / PRIOR / NEXT

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, MUT-II/III can be used to Retest each system by checking the diagnosis trouble codes. The MUT-II/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 CAUSES Malfunction of the auto-cruise control switch. Malfunction of the stop lamp switch. Malfunction of the inhibitor switch. Malfunction of the engine-A/T-ECU.
DIAGNOSIS PROCEDURE
STEP 1. Check the MUT-II/III diagnosis code Q: Is any diagnosis code set? YES: Refer to , Check Chart for Diagnosis Codes. Then go to Step 6. NO: Go to Step 2.
STEP 2. MUT-II/III data list Item 04: Cancel switch (Refer to data list reference table ). Q: Is the check result normal? YES: Go to Step 3. NO: Refer to , Symptom Procedures number 3. Then go to Step 6.
STEP 3. MUT-II/III data list 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? YES: Go to Step 4. NO: Refer to , Symptom Procedures number 1. Then go to Step 6.
STEP 4. MUT-II/III data list Item 07, Inhibitor switch (Refer to data list reference table ). Q: Is the check result normal? YES: Go to Step 5 NO: Refer to , Symptom Procedures number 2. Then go to Step 6
STEP 5. Check the symptoms. Q: Can auto-cruise control be set? YES: It can be assumed that this malfunction is intermittent. NO: Replace the engine-A/T-ECU (Refer to GROUP 13C, Engine-A/T-ECU ). Then go to Step 6.
STEP 6. Check the symptoms. Q: Can auto-cruise control be set? YES: The procedure is complete. NO: Return to Step 1.

[17] ENGINE AND EMISSION CONTROL - - AUTO-CRUISE CONTROL <4G69-VEHICLES WITH AUTO-CRUISE CONTROL SYSTEM> - SYMPTOM PROCEDURES - Inspection Procedure 4: Auto-cruise Control cannot be Set. | PRINT PAGE / INDEX / PRIOR / NEXT

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