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B1015 - Rear Defrost Switch Request Input Circuit/Performance: Notes

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS information.

Theory of Operation 

The switch input changes when the switch is pushed down. A stored DTC indicates that the rear defrost switch was stuck in a pushed position for more than 10 minutes, but has since returned to its normal state. An active DTC indicates that the rear defrost switch is stuck in a pushed position.

Possible Causes
OBJECT HOLDING REAR DEFROST SWITCH IN A PUSHED POSITION
SUBSTANCE CAUSING REAR DEFROST SWITCH TO GET STUCK IN A PUSHED POSITION
A/C HEATER CONTROL