Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

Check ACC, ECU-IG1 fuse.
CHECK:

Check continuity of ACC, ECU-IG1 fuse.

OK:
1. Continuity
1. NG : Replace faulty fuse.
2. OK : GO TO NEXT STEP
Check voltage between terminals ACC, SIG and GND1, 2 of Body ECU (Main) connector.
PREPARATION:

Turn the ignition switch ON.

CHECK:

Measure voltage between terminal ACC, SIG and GND1, 2.

OK:
1. 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 (Main) and body ground. Body ECU (Main) and fuse (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG : Repair or replace wire harness or connector.
2. OK : Proceed to next circuit inspection shown on problem symptoms table (See PROBLEM SYMPTOMS TABLE ).