Steering Pad Switch Circuit

NAVIGATION / MULTI INFO DISPLAY: 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 navigation 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
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 Precaution for the supplemental restraint system Service Precautions.

PROCEDURE

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





(a) Disconnect the I24 navigation receiver assembly connector.
(b) Disconnect the H54 spiral cable connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





(d) Reconnect the spiral cable connector.
(e) Reconnect the navigation receiver assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. INSPECT SPIRAL CABLE





(a) Disconnect the z12 and H54 spiral cable connectors.
(b) 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 Precaution for the supplemental restraint system Service Precautions.
(c) Reconnect the spiral cable connectors.
NG -- REPLACE SPIRAL CABLE
OK -- Continue to next step.
3. INSPECT STEERING PAD SWITCH ASSEMBLY





(a) Disconnect the z12 steering pad switch assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





(c) Reconnect the steering pad switch assembly connector.
NG -- REPLACE STEERING PAD SWITCH ASSEMBLY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE