Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

Check ECU-IG and RADIO NO.2 fuse
CHECK:

Check continuity of ECU-IG and RADIO NO. 2 fuse

OK

continuity
1. NG: replace the failure cause
2. OK: Go to next step.
Check voltage between terminals ACC, IG and GND of Body ECU connect
PREPARATION:

Turn ignition switch ON

CHECK:

Measure voltage between terminals ACC, ig and GND

OK

voltage: 10-14 V
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. NG: Repair or replace wire harness or connector
2. OK: Go to next step.
  Check and repair wire harness and connector between Body ECU and battery