Steering Pad Switch Circuit

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 RADIO RECEIVER





(a) Disconnect the radio receiver connector R4.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- INSPECT STEERING PAD SWITCH ASSEMBLY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT STEERING PAD SWITCH ASSEMBLY
(a) Disconnect the steering pad switch assembly connector A.





(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE STEERING PAD SWITCH ASSEMBLY
OK -- Continue to next step.
3. INSPECT SPIRAL CABLE





(a) Disconnect the steering pad switch assembly and spiral cable connectors.
(b) Measure the resistance according to the value(s) in the table below.
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.
HINT:
- Removal Removal
- Installation Installation

NG -- REPLACE SPIRAL CABLE
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)