How To Proceed With Troubleshooting

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

NOTE: Troubleshoot in accordance with the procedures as follows.

VEHICLE BROUGHT TO WORKSHOP
1. Go to next step.
CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK
1. Go to next step.
INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE 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.
1. B: Go to MULTIPLEX COMMUNICATION SECTION (See HOW TO PROCEED WITH TROUBLESHOOTING )
2. A: Go to next step.
PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
1. When problem is not listed on problem symptoms table, proceed to A.
2. When problem is listed on problem symptoms table, proceed to B.
1. B: Go to step 6
2. A: Go to next step.
PERFORM TROUBLESHOOTING ACCORDING TO 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 THEFT DETERRENT & DOOR LOCK ).
4. Terminals of ECU (See TERMINALS OF ECU ).
1. Go to next step.
ADJUST, REPAIR OR REPLACE
1. Go to next step.
CONFIRMATION TEST
1. END