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 voltage between terminal +B of A/C amplifier and body ground.
PREPARATION:

Remove the A/C amplifier with connector still connected.

CHECK:

Measure voltage between terminal +B of A/C amplifier connector and body ground.

OK:
1. Voltage: Battery positive voltage
Fig 1: Checking Voltage Between Terminal +B Of A/C Amplifier And Body Ground
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: Proceed to next circuit inspection shown on problem symptoms table (See PROBLEM SYMPTOMS TABLE ).
2. NG: Go to Next Step.
Check ECU-B fuse.
PREPARATION:

Remove ECU-B2 fuse from cowl side J/B RH.

CHECK:

Check continuity of ECU-B2 fuse.

OK:
1. Continuity
Fig 2: Identifying ECU-B2 Fuse Location In Cowl Side J/B RH
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Check for short in all the harness and components connected to the ECU-B2 fuse (See SYSTEM WIRING DIAGRAMS ).
2. OK: Check and repair harness and connector between A/C amplifier and battery.