Recirculation Calibration Fault

Tests 1 - 2:

Tests 3 - 4:

Tests 5 - 7:

SYMPTOM
RECIRCULATION CALIBRATION FAULT - MTC

TEST NOTE
This symptom is diagnosed using the test BLEND CALIBRATION FAULT - MTC.

WHEN MONITORED
When the HVAC Door Recalibration is executed.

SET CONDITION
If the mode 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.

POSSIBLE CAUSES
- HVAC DTC(s) present
- Door actuator
- Blend actuator/linkage/door
- Recirculation actuator/linkage/door
- Mode actuator/linkage/door
- Door actuator driver circuit open
- Common door driver circuit open
- A/C - heater control module