Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

Check voltage between terminal R-B of A/C amplifier connector and body ground.
PREPARATION:

Remove the A/C amplifier with connector still connected.

CHECK:

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

OK:

Voltage : Battery positive voltage

Fig 1: Identifying Terminal R-B Of A/C Amplifier Connector 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 RR ECU-B fuse.
PREPARATION:

Remove RR ECU-B fuse from luggage room J/B

CHECK:

Check continuity of RR ECU-B fuse.

OK:

Continuity

Fig 2: Identifying Rr Ecu-B Fuse
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG : Check for short in all the harness and components connected to the RR ECU-B fuse (See WIRING DIAGRAM ).
2. OK : Check and repair harness and connector between A/C amplifier and battery.