Inspection Procedure

WARNING: This page is about a different car, the 2002 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

Check ECU-B fuse.
Check continuity of ECU-B fuse.

OK: Continuity
1. OK: Go to next step.
2. NG: Replace the failure fuse.
Check voltage between terminals Body ECU and GND of Body ECU connector.
PREPARATION:
1. Turn ignition switch OFF.
2. Disconnect the Body ECU connector.
CHECK:

Measure voltage between terminals BECU and GND.

OK: Voltage: 10-14V
1. OK: Proceed to next circuit inspection shown on problem symptoms table (See PROBLEM SYMPTOMS TABLE ).
2. NG: Go to next step.
Check wire harness and connector between Body ECU and body ground.
1. OK: Check and repair wire harness and connector between Body ECU and battery.
2. NG: Repair or replace wire harness or connector.