Steering Pad Switch Circuit

AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/o Multi-display): 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 LH to the radio receiver assembly.

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

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 LH, 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 E114 radio receiver assembly connector (for 6 speakers (w/ USB audio system)).

(b) Disconnect the E26 radio receiver assembly connector (for 6 speakers (w/o USB audio system)).

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

Standard Resistance:

for 6 Speakers (w/o USB Audio System)

for 6 Speakers (w/ USB Audio System)

NG -- INSPECT STEERING PAD SWITCH LH

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

2. INSPECT STEERING PAD SWITCH LH

(a) Disconnect the Y1 steering pad switch LH connector (w/o Front Spoiler).

(b) Disconnect the Y1 steering pad switch LH connector (w/ Front Spoiler).

Text in Illustration

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

3. INSPECT SPIRAL CABLE SUB-ASSEMBLY

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

(b) Measure the resistance according to the value(s) 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. Be sure to read the pages shown in the brackets.

HINT
* Removal Removal
* Installation Installation

Text in Illustration

NG -- REPLACE SPIRAL CABLE SUB-ASSEMBLY Removal

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