[17] ENGINE AND EMISSION CONTROL - - AUTO-CRUISE CONTROL <4G64-VEHICLES WITH AUTO-CRUISE CONTROL SYSTEM> - SYMPTOM PROCEDURES - Inspection Procedure 5: Auto-Cruise Control cannot be Set. | PRINT PAGE / INDEX / PRIOR / NEXT

Inspection Procedure 5: Auto-Cruise Control cannot be Set.
COMMENTS ON TROUBLE SYMPTOM The cause is probably that the fail-safe function is cancelling auto-cruise control. In this case, the MUT-II/III can be used to check the trouble symptoms in each system by inspecting the diagnosis codes. The MUT-II/III can also be used to check if the circuits of each input switch are normal or not by inspecting the input switch codes.
PROBABLE CAUSES Malfunction of the connector. Malfunction of the harness. Malfunction of the auto-cruise control switch. Malfunction of the stop lamp switch. Malfunction of the inhibitor switch. Malfunction of the auto-cruise control-ECU.
DIAGNOSIS PROCEDURE
STEP 1. Check the auto-cruise control-ECU communicate with the MUT-II/III. Q: Can the auto-cruise control-ECU communicate with the MUT-II/III? YES: Go to Step 2. NO: Inspect for each trouble symptom (Refer to inspection procedure 1 ). Then go to Step 7.
STEP 2. MUT-II/III diagnosis code. Q: Are any of MUT-II/III diagnosis code set? YES: Repair the fault, which the MUT-II/III diagnosis code indicates (Refer to diagnosis codes chart ). Then go to Step 7. NO: Go to Step 3.
STEP 3. MUT-II/III data list. Check MUT-II/III data list item 04: Auto-cruise control CANCEL switch (Refer to ). Q: Is the check result normal? YES: Go to Step 4. NO: Inspect for each trouble symptom (Refer to inspection diagnosis code No.15 ). Then go to Step 7.
STEP 4. MUT-II/III data list. Check MUT-II/III data list item 05: Stop lamp switch (Refer to ). Q: Is the check result normal? YES: Go to Step 5. NO: Inspect for each trouble symptom (Refer to inspection procedure 2 ). Then go to Step 7.
STEP 5. MUT-II/III data list. Check MUT-II/III data list item 14: Inhibitor switch. (Refer to ). Q: Is the check result normal? YES: Go to Step 6. NO: Inspect for each trouble symptom (Refer to inspection procedure 3 ). Then go to Step 7.
STEP 6. Retest the system. Q: Does a malfunction take place again? YES: Replace the auto-cruise control-ECU (Refer to ). Then go to Step 7. NO: This malfunction is intermittent (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).
STEP 7. Retest the system. Q: Does a malfunction take place again? YES: Return to Step 1. NO: This malfunction is eliminated.

[17] ENGINE AND EMISSION CONTROL - - AUTO-CRUISE CONTROL <4G64-VEHICLES WITH AUTO-CRUISE CONTROL SYSTEM> - SYMPTOM PROCEDURES - Inspection Procedure 5: Auto-Cruise Control cannot be Set. | PRINT PAGE / INDEX / PRIOR / NEXT

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