Steering Pad Switch Circuit

AUDIO / VISUAL: 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 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 resulting condition is the same as if the switch were continuously depressed.
Therefore, the radio receiver assembly cannot be operated using the steering pad switch assembly, and the radio receiver assembly itself cannot function.

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTICE: 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 precaution for the Supplemental Restraint System Service Precautions.

PROCEDURE

1. INSPECT RADIO RECEIVER ASSEMBLY




(a) Disconnect the R3 radio receiver assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






*: w/ Stereo Component Amplifier Assembly
(c) Reconnect the radio receiver assembly connector.
NG -- INSPECT STEERING PAD SWITCH ASSEMBLY
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN 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:





*: for Double Cab with 7 Speakers
(c) Reconnect the radio receiver assembly connector.
NG -- REPLACE STEERING PAD SWITCH ASSEMBLY
OK -- Continue to next step.

3. INSPECT SPIRAL CABLE SUB-ASSEMBLY




(a) Disconnect the S8 spiral cable sub-assembly connector.
(b) Disconnect the steering pad switch assembly connector.
(c) 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 Removal.
(d) Reconnect the radio receiver assembly connector.
NG -- REPLACE SPIRAL CABLE SUB-ASSEMBLY
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)