Steering Pad Switch Circuit

AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/ Multi-display with DVD Player): Steering Pad Switch Circuit; 2013 MY Corolla [07/2012 -]
- Steering Pad Switch Circuit

DESCRIPTION

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

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

If there is a short in this circuit, the resulting condition is the same condition as when a switch is continuously depressed. Therefore, the navigation receiver assembly cannot be operated using the steering pad switch assembly, and the navigation receiver assembly itself cannot function.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
The vehicle is equipped with an SRS (Supplemental Restraint System). 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 E26 navigation receiver assembly connector.

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

Standard Resistance:





NG -- INSPECT SPIRAL CABLE SUB-ASSEMBLY

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

2. INSPECT SPIRAL CABLE SUB-ASSEMBLY

(a) Disconnect the Y1 steering pad switch assembly and E6 spiral cable sub-assembly connectors.





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

Standard Resistance:





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

Standard Resistance:





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

HINT
* Removal Removal
* Installation Installation

Text in Illustration





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

3. INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Disconnect the Y1 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 -- REPAIR OR REPLACE HARNESS OR CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)