DTC 040

Diagnostic Trouble Code Chart:

Wiring Schematics:

CIRCUIT DESCRIPTION
The HVAC programmer commands the actuator to move by suppling battery voltage. The feedback supplied to the HVAC programmer is a regulated 5 volts. The feedback voltage is a function of the motor position with a high voltage of 4-5 volts indicating full cold door position. A low voltage of less than 1 volt indicates the full hot position. Operation of the air mix door actuator can be evaluated through the Scan Tool.

CONDITIONS FOR SETTING THE DTC
The ignition is ON.

ACTION TAKEN WHEN THE DTC SETS
Only the full hot or full cold may be used by the system.

CONDITIONS FOR CLEARING THE DTC
^ Using a Scan Tool.
^ A history DTC will clear when 40 consecutive ignition cycles have occurred without a malfunction.
^ HVAC programmer battery voltage is interrupted.