Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

Check ECU-B2 and SECURITY fuse.
CHECK:

Check continuity of ECU-B2 and SECURITY fuse.

OK:
1. Continuity
1. NG: Replace faulty fuse.
2. OK: Go to Next Step.
Check voltage between terminal +B1, +B2 and E of theft deterrent ECU connector.
PREPARATION:
1. Turn the ignition switch OFF.
2. Disconnect the theft deterrent ECU connector.
CHECK:

Measure the voltage between terminal +B1, +B2 and E.

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 theft deterrent ECU and body ground, theft deterrent ECU and fuse (See 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 ).