Steering Pad Switch Circuit

NAVIGATION: NAVIGATION SYSTEM (for HDD): 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 navigation system cannot be operated using the steering pad switch.
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, and the navigation system itself cannot function.

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE:
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 (RADIO RECEIVER - SPIRAL CABLE)




(a) Disconnect the L52*1 or L57*2 receiver connector.
(b) Disconnect the L24 cable connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:





HINT:
*1: for DVD Changer Models
*2: for CD Changer Models

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

2. INSPECT SPIRAL CABLE




(a) Disconnect the z7 and L24 cable connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NOTE:
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
OK -- Continue to next step.

3. INSPECT STEERING PAD SWITCH ASSEMBLY




(a) Disconnect the z7 switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- INSPECT STEERING PAD SWITCH ASSEMBLY (STEERING PAD SIDE)
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
4. INSPECT STEERING PAD SWITCH ASSEMBLY (STEERING PAD SIDE)




(a) Disconnect the z8 switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






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