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 How to Proceed With Troubleshooting.
(a) Check for output DTCs.
Result:





HINT: The hybrid vehicle control ECU 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 CAN Communication System.
(a) Check for output DTCs.
Result:





HINT: The hybrid vehicle control ECU 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 Cruise Control System.
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 Electronic Circuit Inspection Procedure.
NEXT -- Continue to next step.
10. PROBLEM SYMPTOMS TABLE
Refer to the problem symptoms table Cruise Control System.
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