Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE(HTR FUSE)
1. Remove the HTR fuse from the driver side J/B.
2. Check that the continuity exists of HTR fuse.
NG: REPLACE FUSE

OK: Go to next step.
CHECK HARNESS AND CONNECTOR(BETWEEN HEATER CONTROL HOUSING SUB-ASSY AND BATTERY)
1. Remove the A/C amplifier with connectors still connected.
2. Turn ignition switch ON.
3. Measure voltage between terminal IG of the A/C amplifier and body ground.
  
  Fig 1: Measuring Voltage Between Terminal IG Of A/C Amplifier And Body Ground
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Voltage: 10 to 14 V
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE(SEE PROBLEM SYMPTOMS TABLE )