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 
2. CUSTOMER PROBLEM ANALYSIS 
   1. Interview the customer to confirm the trouble (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS )
3. INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN) 
   1. Use the intelligent tester to check for normal function of the multiplex communication system.
      1. (ECU unconnected, communication line malfunctioning) If no code is output, proceed to A.
      2. (ECU unconnected, communication line malfunctioning) If any code is output, proceed to B.

   B: Go To  MULTIPLEX COMMUNICATION SYSTEM 

   A: Go to next step 

4. SYMPTOM SIMULATION 
5. PROBLEM SYMPTOMS TABLE 
   1. If the fault is not listed on the problem symptoms table, proceed to A.
   2. If the fault is listed on the problem symptoms table, proceed to B.

   B: Go to step  7

   A: Go to next step 

6. PERFORM TROUBLESHOOTING ACCORDING TO MALFUNCTION SYMPTOM 
   1. See TERMINALS OF ECU 
   2. See DATA LIST / ACTIVE TEST 
7. ADJUST, REPAIR OR REPLACE 
8. CONFIRMATION TEST 

   NEXT: END