Inspection Procedure

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

Check ECU-IG, PWR No. 1 and ECU-B fuse.
CHECK:

Check continuity of ECU-IG, PWR No. 1 and ECU-B fuse.

OK:
1. Continuity
1. NG : Replace the failure fuse.
2. OK : Go to Next Step
Check voltage between terminals BDR, CPUB, SIG and GND of driver door ECU connector.
PREPARATION:

Turn ignition switch ON.

CHECK:

Measure voltage between terminals SIG, and GND.

OK:
1. Voltage: 10 - 14 V
PREPARATION:
1. Turn ignition switch OFF.
2. Disconnect the driver door ECU connector.
CHECK:

Measure voltage between terminals BDR, CPUB and GND.

OK:
1. 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 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 : Proceed to next circuit inspection shown on problem symptoms table (See PROBLEM SYMPTOMS TABLE ).