Steering Pad Switch Circuit

AUDIO AND VISUAL SYSTEM (for Regular Cab and Double Cab): 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 audio system cannot be operated using the steering pad switch.
If there is a short in the circuit, the same condition as when the switch is continuously depressed occurs.
Therefore, the radio receiver cannot be operated using the steering pad switch, and also the radio receiver 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 precautionary notice for the SRS (Service Precautions).

PROCEDURE

1. INSPECT RADIO RECEIVER





(a) Disconnect the K3 receiver connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- INSPECT STEERING PAD SWITCH ASSEMBLY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT STEERING PAD SWITCH ASSEMBLY
(a) Disconnect the z3 switch connector.
(b) Measure the resistance according to the values in the table below.





Standard resistance:





NG -- REPLACE STEERING PAD SWITCH ASSEMBLY
OK -- Continue to next step.
3. INSPECT SPIRAL CABLE





(a) Disconnect the z3 switch connector.
(b) Disconnect the J45 cable connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:





CAUTION: 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
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)