Steering Pad Switch Circuit

AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/o Navigation System): Steering Pad Switch Circuit
- Steering Pad Switch Circuit

DESCRIPTION

This circuit sends an operation signal from the steering pad switch assembly to the radio receiver assembly.

If there is an open in the circuit, the audio system cannot be operated using the steering pad switch assembly.

If there is a short in the circuit, the same condition as when a switch is continuously depressed occurs.

Therefore, the radio receiver assembly cannot be operated using the steering pad switch assembly, and also the radio receiver assembly itself cannot function.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System Service Precautions.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH SIGNAL)

(a) Disconnect the radio receiver assembly connector.

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

Standard Resistance:

for 10 Speakers





for 6 Speakers





NG -- INSPECT STEERING PAD SWITCH ASSEMBLY

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

2. INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Disconnect the steering pad switch assembly connector.

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





Standard Resistance:





Text in Illustration





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

3. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

(a) Disconnect the steering pad switch assembly and spiral with sensor cable sub-assembly connectors.

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





Standard Resistance:





(c) After setting the spiral with sensor cable sub-assembly to the center position, rotate the spiral with sensor cable sub-assembly 2.5 times clockwise. Then while rotating the spiral with sensor cable sub-assembly 5 times counterclockwise, measure the resistance as shown in the table below.

Standard Resistance:





NOTICE:
* The spiral with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may prevent the airbag from deploying. Refer to the pages shown in the brackets.
* As the spiral with sensor cable sub-assembly may break, do not rotate the spiral with sensor cable sub-assembly more than the specified amount.

HINT
* Removal Removal
* Installation Installation

Text in Illustration





NG -- REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Removal

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR