How To Proceed With Troubleshooting

VEHICLE BROUGHT IN
1. GO TO NEXT STEP
CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK (See CUSTOMER PROBLEM ANALYSIS CHECK )
1. GO TO NEXT STEP
INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE BODY MULTIPLEX COMMUNICATION SYSTEM (BEAN)
1. Check there is no abnormality in the communication system by inspecting the communication function of the body multiplex communication system with LEXUS 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
1. B: GO TO BODY MULTIPLEX COMMUNICATION SECTION
2. A: GO TO NEXT STEP
DIAGNOSIS TROUBLE CODE CHECK (See DIAGNOSTIC TROUBLE CODE CHART )
1. Check diagnosis code.
  1. Without code outputs, proceed to A
  2. With code outputs, proceed to B
1. B: GO TO STEP 7
2. A: GO TO NEXT STEP
SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
1. Without applicable symptoms, proceed to A
2. With applicable symptoms, proceed to B
1. B: GO TO STEP 7
2. A: GO TO NEXT STEP
PERFORM TROUBLESHOOTING IN THE FOLLOWING METHOD, DEPENDING ON MALFUNCTION SYMPTOM
1. Pre-check
  1. Inspection with LEXUS hand-held tester (ECU DATA MONITOR)
  2. Inspection with LEXUS hand-held tester (ACTIVE TEST)
2. Terminal of ECU
ADJUSTMENT, REPAIR OR REPLACEMENT
1. GO TO NEXT STEP
2. END