How To Proceed With Troubleshooting

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

HINT:

Use this procedure to troubleshoot the power window control system.
The hand-held tester should be used in step 3 and 5.

VEHICLE BROUGHT TO WORKSHOP
CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK
CHECK COMMUNICATION FUNCTION OF LARGE-SCALE BODY MULTIPLEX COMMUNICATION SYSTEM (BEAN)
1. Use the hand-held tester to check for normal function of the multiplex communication system.
  1. (ECU unconnected, communication line malfunctioning) Without code outputs, proceed to A.
  2. (ECU unconnected, communication line malfunctioning) With code outputs, proceed to B.
B: Go to MULTIPLEX COMMUNICATION SYSTEM (See CUSTOMER PROBLEM ANALYSIS CHECK )

A: Go to next step.
PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
1. If the fault is not listed on the problem symptoms table, proceed to A.
2. If the fault is listed on the problem symptoms table, proceed to B.
B: Go to step 6

A: Go to next step.
OVERALL ANALYSIS AND TROUBLESHOOTING
1. DATA LIST/ACTIVE TEST
  Inspection with the hand-held tester (DATA LIST).
2. On-vehicle Inspection (see ON-VEHICLE INSPECTION )
3. Inspection (see INSPECTION )
4. Terminals of ECU (see TERMINALS OF ECU )
ADJUST, REPAIR OR REPLACE
CONFIRMATION TEST
END