Steering Pad Switch Circuit

NAVIGATION: 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 and display 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 and display receiver assembly cannot be operated using the steering pad switch assembly, and also the radio and display 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 precautionary notice for the Supplemental Restraint System Service Precautions.

PROCEDURE

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

(a) Disconnect the R15 radio and display receiver assembly connector.





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

Standard Resistance:





Text in Illustration





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 z1 steering pad switch assembly connector.





Text in Illustration





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

Standard Resistance:





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

3. INSPECT SPIRAL CABLE SUB-ASSEMBLY

(a) Disconnect the z1 steering pad switch assembly connector.





(b) Disconnect the S8 spiral cable sub-assembly connector.

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

Standard Resistance:





Text in Illustration





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

NG -- REPLACE SPIRAL CABLE SUB-ASSEMBLY Removal

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