How To Proceed With Troubleshooting

Vehicle Brought In
Customer Problem Analysis Check And Symptom Check (See CUSTOMER PROBLEM ANALYSIS 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 A
  2. (ECU unconnected, communication line abnormal) With code outputs, proceed to B
1. A : Go To Step 4 , (Diagnostic Trouble Code Check).
2. B : Go To Body Multiplex Communication Section (See DIAGNOSTIC TROUBLE CODE CHART )
Diagnostic Trouble Code Check. See DIAGNOSTIC TROUBLE CODE CHART
1. Check DTC.
  1. Without code outputs, proceed to A
  2. With code outputs, proceed to B
1. A : Go To Step 5 , (Problem Symptoms Table).
2. B : Go To Step 7 , (Adjustment, Repair Or Replacement).
Problem Symptoms Table. See PROBLEM SYMPTOMS TABLE .
1. Without applicable symptoms, proceed to A
2. With applicable symptoms, proceed to B
1. A : Go To Next Step , (Perform Troubleshooting In The Following Method, Depending On Malfunction Symptom).
2. B : Go To Step 7 , (Adjustment, Repair Or Replacement).
Perform Troubleshooting In The Following Method, Depending On Malfunction Symptom
1. Pre-check (See PRE-CHECK )
  1. Check with hand-held tester (ECU DATA MONITOR)
  2. Check with hand-held tester (ACTIVE TEST)
2. Terminals of ECU (See TERMINALS OF ECU )
Adjustment, Repair Or Replacement
End