Steering Pad Switch Circuit

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Steering Pad Switch Circuit

Steering Pad Switch Circuit

DESCRIPTION

This circuit sends an operation signal from the steering pad switch to the radio receiver.
If there is an open in the circuit, the audio system cannot be operated using the steering pad switch.
If there is a short in the circuit, the same condition as when the switch is continuously depressed occurs.
As a result, the radio receiver cannot be operated using the steering pad switch, and also the radio receiver itself cannot function.

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE: The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the Supplemental Restraint System.

PROCEDURE

1. CHECK STEERING PAD SWITCH CIRCUIT




(a) Disconnect the R5 receiver connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.

2. INSPECT STEERING PAD SWITCH




(a) Disconnect the steering pad switch connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPLACE STEERING PAD SWITCH
OK -- Continue to next step.

3. INSPECT SPIRAL CABLE




(a) Disconnect the steering pad switch connector.
(b) Disconnect the spiral cable connector.
(c) Measure the resistance of the cable.
Standard resistance:





NOTE: The spiral cable is an important part of the SRS. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the SRS section's precaution.

NG -- REPLACE SPIRAL CABLE
OK -- Continue to next step.

4. CHECK WIRE HARNESS (SPIRAL CABLE - RADIO RECEIVER)




(a) Disconnect the R5 receiver connector.
(b) Disconnect the C12 cable connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE