B0282

CIRCUIT DESCRIPTION
The instrument panel integration module (IPM) commands right air temperature actuator movement with one of three voltage signals applied to the right air temperature door control circuit. A low voltage of 0 volts moves the right air temperature door toward full hot. A voltage of 2.5 volts stops the actuator. A voltage of 5 volts moves the right air temperature door toward full cold. The IPM determines the current position of the actuator by monitoring the feedback voltage of the right air temperature door position signal circuit. The feedback potentiometer position is a function of the actuator position. A high voltage indicates a full cold right air temperature door position. A low voltage indicates a full hot right air temperature door position. The IPM controls the right air temperature door position in order to maintain the selected air temperature on the HVAC control module. The IPM will perform a continuous test on the current feedback voltage. If the feedback voltage does not equal or fall within the calibrated limits, the DTC will set.

CONDITIONS FOR RUNNING THE DTC
The ignition is turned ON.

CONDITIONS FOR SETTING THE DTC
The IPM detects the signal circuit is less than 0.09 volt (5 counts) or greater than 4.90 volts (250 counts).

ACTION TAKEN WHEN THE DTC SETS
^ A default value of 2.50 volts (128 counts) will be substituted for the right air temperature door position data by the IPM.
^ The IPM will toggle the actuator between full hot and full cool in an attempt to maintain the selected air temperature on the HVAC control module.

CONDITIONS FOR CLEARING THE DTC
^ The DTC will become history if the IPM no longer detects a failure.
^ The history DTC will clear after 50 fault-free ignition cycles.
^ Use the scan tool in order to clear the DTCs.

DIAGNOSTIC AIDS
^ If the condition is not present, refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.
^ A damaged or broken right air temperature door and or actuator can cause this DTC to set by allowing the actuator shaft to rotate unrestricted to its internal stop, creating an overtravel condition. The internal stops are outside of the feedback potentiometers 0-250 count working range.

TEST DESCRIPTION

Steps 1-2:

Steps 3-10:

Steps 11-17:

The numbers below refer to the step numbers on the diagnostic table.
4. Tests for the proper operation of the circuit in the high voltage range.
5. Tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.
6. Tests for a short to ground in the 5 volt reference circuit.