Blend Calibration Fault, Mode Calibration Fault, Rear Blend Calibration Fault, Rear Mode Calibration Fault, RECIRCULATION Calibration Fault & Zone Calibration Fault

NOTE: All DTCs listed are diagnosed using this test procedure.

When Monitored:

When the HVAC Door Recalibration is executed.

Set Condition:

DTC will set if the 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 or a short to voltage or ground on the Door Actuator electrical circuits.

Possible Causes:

Check for Actuator Circuit Test DTCs.
Check for HVAC DTCS.
Door Actuator Driver circuit open.
Common Door Driver circuit open.
Door Actuator.
Door Actuator/Linkage/Door.
A/C-Heater Control Module.

CAUTION: Always turn ignition off before disconnecting or connecting any control module connector. Failure to do so could result in damage to control module.

NOTE: Ensure vehicle being tested has a fully charged battery. If it does not, false DTCs or error messages may occur.

NOTE: For component location, see appropriate illustration under COMPONENT LOCATIONS . For terminal identification, see appropriate illustration under CONNECTOR IDENTIFICATION . For circuit and wire color identification, see WIRING DIAGRAMS . For component removal and installation procedures, see appropriate component under REMOVAL & INSTALLATION .

NOTE: All Actuator Circuit Test DTCs and Overcurrent DTCs must be repaired before diagnosing Calibration DTCs.

Testing:

Turn ignition off. Connect DRBIII(R) to DLC. Turn ignition on. Using the DRBIII(R) select HVAC, SYSTEM TESTS, then actuate the Actuator Circuit Test. Does the DRBIII(R) display any Actuator Circuit Test DTCs? If yes, return to DIAGNOSTIC TROUBLE CODE DEFINITIONS and perform appropriate DTC test. If no, go to next step.
Using the DRBIII(R), read HVAC DTCs. Does the DRBIII(R) display any HVAC DTCs? If yes, return to DIAGNOSTIC TROUBLE CODE DEFINITIONS and perform appropriate DTC test. If no, go to next step.
Turn ignition off. Disconnect the A/C-Heater Control Module C1 harness connector. Measure resistance between the Common Door Driver circuit and the suspect door driver circuit. Is resistance more than 70 ohms? If yes, go to next step. If no, go to step 6 .
Remove the suspect Door Actuator from the A/C-Heater Housing Assembly. Disconnect the Door Actuator harness connector. Measure resistance of the suspect door driver circuit between the A/C-Heater Control Module C1 harness connector and the Door Actuator harness connector. Is resistance less than 5 ohms? If yes, go to next step. If no, repair open in the suspect door driver circuit. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.
Measure resistance of the Common Door Driver circuit between the suspect Door Actuator harness connector and the A/C-Heater Control Module C1 harness connector. Is resistance less than 5 ohms? If yes, replace suspect Door Actuator. Perform BODY VERIFICATION TEST under VERIFICATION TESTS. If no, repair open in the Common Door Driver circuit. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.
Inspect the A/C-Heater Housing Assembly for broken actuator linkage. Check the door for binding and loss of full range. Is the Door Actuator, the linkage, and the door in good condition and functioning correctly? If yes, replace A/C-Heater Control Module. Perform BODY VERIFICATION TEST under VERIFICATION TESTS. If no, repair as necessary. Perform BODY VERIFICATION TEST under VERIFICATION TESTS.