Blend Calibration Fault - Dodge Ram 2004 Service Manual

HEATING & A/C
Symptom List:

BLEND CALIBRATION FAULT

MODE 1 CALIBRATION FAULT
MODE 2 CALIBRATION FAULT
RECIRCULATION CALIBRATION FAULT
ZONE CALIBRATION FAULT
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be BLEND CALIBRATION FAULT.
When Monitored and Set Condition:
BLEND CALIBRATION FAULT
When Monitored: When the HVAC Door Recalibration is executed.
Set Condition: If the blend (single-zone) or passenger blend (dual-zone) door's span is
found outside the tolerance due to: open door actuator electrical circuits; a bad door
actuator; broken door linkage; a bound up door; door actuator electrical circuits shorted to
voltage; door actuator electrical circuits shorted to ground. A short to voltage or ground on
the door actuator electrical circuits will also set door actuator overcurrent faults.
MODE 1 CALIBRATION FAULT
When Monitored: When the HVAC Door Recalibration is executed.
Set Condition: If the Mode 1 door's span is found outside the tolerance due to: open door
actuator electrical circuits; a bad door actuator; broken door linkage; a bound up door; door
actuator electrical circuits shorted to voltage; door actuator electrical circuits shorted to
ground. A short to voltage or ground on the door actuator electrical circuits will also set
door actuator overcurrent faults.
MODE 2 CALIBRATION FAULT
When Monitored: When the HVAC Door Recalibration is executed.
Set Condition: If the Mode 2 door's span is found outside the tolerance due to: open door
actuator electrical circuits; a bad door actuator; broken door linkage; a bound up door; door
actuator electrical circuits shorted to voltage; door actuator electrical circuits shorted to
ground. A short to voltage or ground on the door actuator electrical circuits will also set
door actuator overcurrent faults.
RECIRCULATION CALIBRATION FAULT
When Monitored: When the HVAC Door Recalibration is executed.
Set Condition: If the recirculation door's span is found outside the tolerance due to: open
door actuator electrical circuits; a bad door actuator; broken door linkage; a bound up door;
door actuator electrical circuits shorted to voltage; door actuator electrical circuits shorted
to ground. A short to voltage or ground on the door actuator electrical circuits will also set
door actuator overcurrent faults.
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