Steering Pad Switch Circuit

AIR CONDITIONING: AIR CONDITIONING SYSTEM: Steering Pad Switch Circuit

Steering Pad Switch Circuit

DESCRIPTION

AUTO, OFF, TEMP UP (+), TEMP DOWN (-) switches are located on the steering pad switch. The resistance of the steering pad switch changes in accordance with switch operation. The heater control panel outputs voltage to the steering pad switch and reads voltage changes according to the resistance changes with switch operation.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT HEATER CONTROL PANEL





(a) Remove the heater control panel LH with connectors still connected.
(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
2. INSPECT STEERING PAD SWITCH ASSEMBLY
(a) Remove the steering pad switch assembly.





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






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

3. INSPECT SPIRAL CABLE SUB-ASSEMBLY





(a) Disconnect the connector from spiral cable sub-assembly.
(b) Measure resistance according to the value(s) in the table below.
Standard Resistance:






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

4. CHECK HARNESS AND CONNECTOR (HEATER CONTROL PANEL LH - SPIRAL CABLE SUB-ASSEMBLY)





(a) Disconnect the connector from heater control panel LH.





(b) Disconnect the connector from the spiral cable sub-assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE