Steering Pad Switch Circuit

NAVIGATION: NAVIGATION SYSTEM (for DVD): Steering Pad Switch Circuit
- Steering Pad Switch Circuit

DESCRIPTION

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

If there is an open in the circuit, the navigation 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 navigation system cannot be operated using the steering pad switch assembly, and the navigation system 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 the Precaution in the Supplemental Restraint System Service Precautions.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - SPIRAL CABLE)

(a) Disconnect the L59 display and navigation module display connector.

(b) Disconnect the L134 spiral cable sub-assembly connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. INSPECT SPIRAL CABLE SUB-ASSEMBLY

(a) Remove the spiral cable sub-assembly Removal.





Text in Illustration





(b) 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 supplemental restraint system Service Precautions.

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

3. INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Remove the steering pad switch assembly Removal.





Text in Illustration





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

Standard Resistance:

w/ Transmission Shift Switch
w/o Transmission Shift Switch










NG -- INSPECT STEERING PAD SWITCH ASSEMBLY (STEERING PAD SIDE)

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

4. INSPECT STEERING PAD SWITCH ASSEMBLY (STEERING PAD SIDE)

(a) Remove the steering pad switch assembly (steering wheel side) Removal.





Text in Illustration





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

Standard Resistance:





NG -- REPLACE STEERING PAD ASSEMBLY (STEERING PAD SIDE) Removal

OK -- REPLACE STEERING PAD SWITCH ASSEMBLY (STEERING WHEEL SIDE) Removal