How To Proceed With Troubleshooting

VEHICLE BROUGHT IN TO WORKSHOP
PROBLEM SYMPTOM CONFIRMATION
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 the LEXUS hand-held tester.
  1. (ECU unconnected, communication line abnormal) With code outputs, proceed to A.
  2. (ECU unconnected, communication line abnormal) Without code outputs, proceed to B.
1. A: Go to next step.
2. B: GO TO SECTION OF EACH SYSTEM
See DIAGNOSTIC TROUBLE CODE CHECK .
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.
  3. When a code is output, proceed to C.
1. A: Go to next step.
2. B: GO TO PROBLEM SIMULATION
3. C: Go to step 7 .
See PROBLEM SYMPTOMS TABLE .
1. Without applicable symptoms, proceed to A.
2. With applicable symptoms, proceed to B.
1. A: Go to next step.
2. B: Go to step 7 .
ACCORDING TO PROBLEM SYMPTOM, PERFORM TROUBLESHOOTING
1. See PRE-CHECK .
2. See TERMINAL OF ECU .
ADJUSTMENT, REPAIR OR REPLACE
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