How To Proceed With Troubleshooting

Troubleshoot in accordance with the procedure.

1. VEHICLE BROUGHT IN 
2. CUSTOMER PROBLEM ANALYSIS AND PROBLEM SYMPTOM CONFIRMATION (See  CUSTOMER PROBLEM ANALYSIS CHECK   ) 
3. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE BODY MULTIPLEX COMMUNICATION SYSTEM (BEAN) 
   1. Check that there is no abnormality in the communication system by inspecting the communication function of the body multiplex communication system with the OBD II scan tool or hand-held tester.
      1. (ECU unconnected, communication line abnormal) Without code outputs, proceed to "A".
      2. (ECU unconnected, communication line abnormal) With code outputs, proceed to "B".

   B: GO TO BODY MULTIPLEX COMMUNICATION (See  HOW TO PROCEED WITH TROUBLESHOOTING  ) 

   A: Go to next step. 

4. PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 
   1. Without applicable symptoms table, proceed to "A".
   2. With applicable symptoms table, proceed to "B".

   B: Go to step   6 

   A: Go to next step. 

5. ACCORDING TO PROBLEM SYMPTOM, PERFORM TROUBLESHOOTING 
   1. Pre-check (See PRE-CHECK  )
      1. Inspection with OBD II scan tool or hand-held tester (Data list)
      2. Inspection with OBD II scan tool or hand-held tester (Active test)
   2. Terminals of ECU (See TERMINALS OF ECU  )
   3. On-vehicle inspection (See ON-VEHICLE INSPECTION )
6. ADJUSTMENT, REPAIR OR REPLACEMENT 
7. CONFIRMATION TEST 

END