Inspection Procedure

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

Check ECU-B, DC/DC, GAUGE and DOOR fuse.
CHECK:

Check continuity of ECU-B, DC/DC, GAUGE and DOOR fuse.

OK:

Continuity
1. NG: Replace the failure fuse.
2. OK
Check voltage between terminals B, BDR and E of body ECU connector.
PREPARATION:
1. Turn ignition switch OFF.
2. Disconnect the Body ECU connector.
CHECK:

Measure voltage between terminals B, BDR and E.

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 . See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .
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.