How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Troubleshoot in accordance with the following procedures.

Vehicle Brought To Workshop
Customer Problem Analysis Check And Symptom Check See CUSTOMER PROBLEM ANALYSIS CHECK .
Inspect Communication Function Of Large-Scale Multiplex Communication System (BEAN)
1. Check that there is no abnormality in the communication system by inspecting the communication function of the multiplex communication system with the hand-held tester.
  1. (ECU unconnected, communication line abnormal) Without code outputs, proceed to next step.
  2. (ECU unconnected, communication line abnormal) With code outputs, proceed to MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSTICS .
PROBLEM SYMPTOMS TABLE See PROBLEM SYMPTOMS TABLE .
1. Without applicable symptoms, proceed to next step.
2. With applicable symptoms, proceed to step 6.
Perform Troubleshooting In Following Method, Depending On Malfunction Symptom
1. See PRE-CHECK .
  1. Inspection with the hand-held tester (ECU DATA LIST).
  2. Inspection with the hand-held tester (ACTIVE TEST).
2. On-vehicle inspection. See ON-VEHICLE INSPECTION .
3. Inspection. See INSPECTION .
4. Terminals of ECU. See TERMINALS OF ECU .
Adjust, Repair Or Replace
1. END