How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2004 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Troubleshoot in accordance with the procedures in the following.

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 A.
  2. (ECU unconnected, communication line abnormal) With code outputs, proceed to B.
  B: GO TO MULTIPLEX COMMUNICATION SECTION See MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSTICS
  
  A: Go to next step
PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
1. Without applicable symptoms, proceed to A.
2. With applicable symptoms, proceed to B.
B: Go to step 6

A: Go to next step
PERFORM TROUBLESHOOTING IN FOLLOWING METHOD, DEPENDING ON MALFUNCTION SYMPTOM
1. Pre-check (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 POWER DOOR LOCK CONTROL SYSTEM ).
3. Inspection (See INSPECTION ).
4. Terminals of ECU (See TERMINALS OF ECU ).
ADJUST, REPAIR OR REPLACE
END