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 hand-held tester.
  1. (ECU unconnected, communication line abnormal). Without code outputs, proceed to step 4.
  2. (ECU unconnected, communication line abnormal) With code outputs, proceed to BODY MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSTICS .
Diagnosis Code Check (See DIAGNOSTIC TROUBLE CODE CHART )
1. Check diagnosis code.
  1. Without code outputs, proceed to step 5.
  2. With code outputs, proceed to step 7.
Symptoms Table (See PROBLEM SYMPTOMS TABLE )
1. Without applicable symptoms, proceed to step 6.
2. With applicable symptoms, proceed to step 7.
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. Inspection with hand-held tester (ACTIVE TEST)
2. ECU terminal position
Adjustment, Repair Or Replacement
END