Steering Pad Switch Circuit

NAVIGATION: NAVIGATION 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 navigation system cannot be operated using the steering pad switch.
If there is a short in the circuit, the resulting condition is the same as if the switch were continuously depressed. Therefore, the navigation system cannot be operated using the steering pad switch, and the navigation system 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 Service Precautions.

PROCEDURE

1. INSPECT STEERING PAD SWITCH ASSEMBLY




(a) Disconnect the switch connector.
(b) Measure the resistance of the switch.
Standard resistance:






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

2. INSPECT SPIRAL CABLE




(a) Disconnect the cable connectors.
(b) Measure the resistance of the cable.
Standard resistance:





NOTE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying Removal.

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

3. 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 -- Continue to next step.

4. CHECK WIRE HARNESS (SPIRAL CABLE - AIR CONDITIONING AMPLIFIER)




(a) Disconnect the A7 amplifier 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 INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE