Inspection Procedure

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

Check steering pad switch.
PREPARATION:

Disconnect the steering pad switch connector.

CHECK:

Check continuity of the wire harness between terminal ILL+ and EAU of the steering pad switch.

OK:
1. Continuity
Fig 1: Checking Continuity Of Wire Harness Between Terminal ILL+ And EAU Of Steering Pad Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG : Replace steering pad switch.
2. OK : Go To Next Step.
Check wire harness and connector between radio and player and steering pad switch.
PREPARATION:

Disconnect the radio and player and steering pad switch connectors.

CHECK:
1. Check continuity of the wire harness between terminal SWG of radio and player and terminal EAU of the steering pad switch.
2. Check continuity of the wire harness between terminal ILL+ of the steering pad switch and battery.
OK:
1. Continuity
1. NG : Repair or replace harness and connector.
2. OK : Replace radio and player (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).