Steering Pad Switch Circuit

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): Steering Pad Switch Circuit
- Steering Pad Switch Circuit

DESCRIPTION

AUTO, OFF, TEMP UP (+), and TEMP DOWN (-) switches are located on the steering pad switch. The resistance of the steering pad switch changes in accordance with switch operation. The air conditioning control assembly outputs voltage to the steering pad switch and reads voltage changes due to the resistance changes that result from switch operation.

HINT
If there is an open in the circuit, the air conditioning system cannot be operated by 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 air conditioning control assembly cannot be operated by the steering pad switch assembly, and the air conditioning control assembly will not be able to function correctly.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY)

(a) Disconnect the E10 control 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 Air Conditioning System (For Automatic Air Conditioning System)

2. INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Remove the steering pad switch assembly Removal.

(b) Disconnect the z2 steering pad switch connector.





(c) 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) Remove the spiral cable connectors Removal.





(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 cautions and notice when replacing the spiral cable.

HINT
The spiral cable makes a maximum of approximately 5 rotations.

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

4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)

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





Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE AIR CONDITIONING CONTROL ASSEMBLY Removal