Inspection Procedure

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

HINT:

Check that there are no obstructions between the switch & volume assy and the infrared ray light emission portion of the stereo component controller assy.

CHECK BATTERY (SWITCH & VOLUME ASSY)
1. Check battery.
  1. Check that the dry-cell battery used for the switch & volume assy is not dead.
  Standard: It is not dead.
1. NG: BATTERY IS DEAD
2. OK: GO TO NEXT STEP
CLEAN THE INFRARED RAYS RECEIVING PORTION
1. Clean the infrared rays receiving portion.
  1. Clean the infrared rays receiving portion on the stereo component controller assy.
  2. Check whether the same malfunction occurs.
  Standard: The function returns to normal.
Fig 1: Cleaning Infrared Rays On Stereo Component Controller Assy
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: NORMAL
2. NG: GO TO NEXT STEP
REPLACE SWITCH & VOLUME ASSY
Standard: Malfunction disappears
1. OK: NORMAL
2. NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE