Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Tundra and 2005 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

Check ECU-IG, PWR NO.1 and ECU-B fuses.
CHECK:

Check continuity of ECU-IG, PWR NO.1 and ECU-B fuses.

OK:

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

Turn the ignition switch ON.

CHECK:

Measure voltage between terminals SIG and GND.

OK:

Voltage: 10 to 14 V

PREPARATION:
1. Turn the ignition switch OFF.
2. Disconnect the driver door ECU connector.
CHECK:

Measure the voltage between terminals BDR, CPUB and GND.

OK:

Voltage: 10 to 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 ).