How To Proceed With Troubleshooting

THEFT DETERRENT SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- Use this procedure to troubleshoot the theft deterrent system.
- The intelligent tester should be used in step 3.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. CUSTOMER PROBLEM ANALYSIS
(a) Interview the customer to confirm the trouble .
NEXT -- Continue to next step.
3. INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)
(a) Use the intelligent tester to check for normal function of the multiplex communication system.
(1) (ECU unconnected, communication line malfunctioning) Without code output, proceed to A.
(2) (ECU unconnected, communication line malfunctioning) With code output, proceed to B.
B -- Go To MULTIPLEX COMMUNICATION SECTION
A -- Continue to next step.
4. SYMPTOM SIMULATION
NEXT -- Continue to next step.
5. PROBLEM SYMPTOMS TABLE
(a) If the fault is not listed on the problem symptoms table, proceed to A.
(b) If the fault is listed on the problem symptoms table, proceed to B.
B -- Go to step 7
A -- Continue to next step.
6. PERFORM TROUBLESHOOTING ACCORDING TO MALFUNCTION SYMPTOM
(a) Terminals of ECU Theft Deterrent System

(b) System description Theft Deterrent System

7. ADJUST, REPAIR OR REPLACE
NEXT -- Continue to next step.
8. CONFIRMATION TEST
NEXT -- END