How To Proceed With Troubleshooting

CRUISE CONTROL SYSTEM:

HOW TO PROCEED WITH TROUBLESHOOTING

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. PROBLEM SYMPTOM CONFIRMATION
NEXT -- Continue to next step.
3. CHECK MULTIPLEX COMMUNICATION SYSTEM
Refer to the how to proceed with troubleshooting
.
(a) Check for output DTCs.
Result:





HINT: The ECM of this system is connected to the multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the multiplex communication system.

B -- PROCEED TO "MULTIPLEX COMMUNICATION SYSTEM"
A -- Continue to next step.
4. CHECK CAN COMMUNICATION SYSTEM
Refer to the precaution
.
(a) Check for output DTCs.
Result:





HINT: The ECM of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.

B -- PROCEED TO "CAN COMMUNICATION SYSTEM"
A -- Continue to next step.
5. DTC CHECK AND CLEAR
Refer to the DTC check/clear Cruise Control System.

NEXT -- Continue to next step.
6. DTC CHECK (OTHER THAN MPX AND CAN SYSTEM DTC)
Refer to the DTC check/clear Cruise Control System.

Result:






A -- GO TO STEP 8
B -- Continue to next step.
7. DTC CHART
Refer to the diagnostic trouble code chart
.
NEXT -- GO TO STEP 11
8. PROBLEM SYMPTOM SIMULATION
Result:






B -- GO TO STEP 10
A -- Continue to next step.
9. SYMPTOM SIMULATION
Refer to the electronic circuit inspection procedure
.
NEXT -- Continue to next step.
10. PROBLEM SYMPTOMS TABLE
Refer to the problem symptoms table Problem Symptoms Table.

NEXT -- Continue to next step.
11. CIRCUIT INSPECTION
NEXT -- Continue to next step.
12. TERMINALS OF ECU
Refer to the terminals of ECU Cruise Control System.

NEXT -- Continue to next step.
13. IDENTIFICATION OF PROBLEM
NEXT -- Continue to next step.
14. REPAIR OR REPLACE
NEXT -- Continue to next step.
15. CONFIRMATION TEST
NEXT -- END