Steering Pad Switch Circuit

AUDIO / VIDEO: 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 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
CAUTION:
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 Precaution for the SRS Service Precautions.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - SPIRAL CABLE)





(a) Disconnect the F23 receiver connector.
(b) Disconnect the E12 cable connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK NO. 1 SWITCH WIRE





(a) Disconnect the z35 cable connector.
(b) Disconnect the switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE NO. 1 SWITCH WIRE
OK -- Continue to next step.
3. INSPECT SPIRAL CABLE SUB-ASSEMBLY





(a) Disconnect the z35 and E12 cable connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





CAUTION:
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. Be sure to read the Precaution for the SRS Service Precautions.

NG -- REPLACE SPIRAL CABLE SUB-ASSEMBLY
OK -- Continue to next step.
4. INSPECT STEERING PAD SWITCH
(a) Disconnect the z51 switch connector.









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






NG -- REPLACE STEERING PAD
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE