How To Proceed With Troubleshooting

VEHICLE BROUGHT TO WORKSHOP
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 MULTIPLEX COMMUNICATION SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )
2. A: GO TO NEXT STEP
DIAGNOSTIC TROUBLE CODE CHECK(See DIAGNOSTIC TROUBLE CODE CHART )
1. Check a DTC and note it if a code is output.
2. Delete the DTC.
3. Check if the DTC will be output once again, when the problem symptom is simulated based on the noted code.
  1. When no code is output (symptom check and simulation is possible), proceed to "A".
  2. When no code is output (symptom check and simulation is impossible), proceed to "B".
1. B: GO TO STEP 7
2. A: GO TO NEXT STEP
PROBLEM SYMPTOMS TABLE(See PROBLEM SYMPTOMS TABLE )
1. Without an applicable symptoms table, proceed to "A".
2. With an applicable symptoms table, proceed to "B".
1. B: GO TO STEP 7
2. A: GO TO NEXT STEP
ACCORDING TO PROBLEM SYMPTOM, PERFORM TROUBLESHOOTING
1. PRE-CHECK (See 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 (See TERMINALS OF ECU )
3. INSPECTION (See PROBLEM SYMPTOMS TABLE )
1. GO TO NEXT STEP
ADJUSTMENT, REPAIR OR REPLACE
1. GO TO NEXT STEP
2. END