How To Proceed With Troubleshooting

Vehicle Brought In
Symptom Check
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 TOYOTA hand-held tester.
  1. (ECU unconnected, communication line abnormal) Without code outputs, go to next step.
  2. (ECU unconnected, communication line abnormal) With code outputs, go to BODY MULTIPLEX COMMUNICATION SYSTEM .
Diagnosis Code Check (See DIAGNOSTIC TROUBLE CODE CHART )
1. Check diagnosis code.
  1. Without code outputs, go to next step.
  2. With code outputs, go to DIAGNOSTIC TROUBLE CODE CHART .
Symptoms Table (See PROBLEM SYMPTOMS )
1. Without applicable symptoms, go to next step.
2. With applicable symptoms, go to PROBLEM SYMPTOMS .
Perform troubleshooting in the following method, depending on malfunction symptom :
1. Pre-inspection (See PRE-CHECK )
  1. Inspection with hand-held tester (ECU DATA MONITOR)
2. ECU terminal position
Adjustment, Repair Or Replacement
End