Steering Pad Switch Circuit

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM (w/o Multi-display): 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 in the SRS Service Precautions.

PROCEDURE

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

(a) Disconnect the L52 radio receiver connector.





(b) Disconnect the L134 spiral cable sub-assembly 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. INSPECT SPIRAL CABLE SUB-ASSEMBLY

(a) Remove the spiral cable sub-assembly Removal.





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

Standard resistance:





NOTICE:
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 Removal
OK -- Continue to next step.

3. INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Remove the steering pad switch assembly Removal.





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

Standard resistance:





NG -- INSPECT STEERING PAD SWITCH ASSEMBLY (STEERING PAD SIDE)

OK -- PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

4. INSPECT STEERING PAD SWITCH ASSEMBLY (STEERING PAD SIDE)

(a) Remove the steering pad switch assembly (steering wheel side) Removal.





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

Standard resistance:





NG -- REPLACE STEERING PAD SWITCH ASSEMBLY Removal

OK -- REPLACE STEERING PAD SWITCH ASSEMBLY (STEERING WHEEL SIDE) Removal