Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

1) CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE & CONTROL CIRCUIT OPEN DTCs
Turn the ignition on.

With the scan tool, read active HVAC DTCs.

Does the scan tool display any active: XXXX CONTROL CIRCUIT/PERFORMANCE or XXXX CONTROL CIRCUIT OPEN DTCs?

Yes
1. Diagnose and repair the DTC(s). If present, diagnose and repair all Control Circuit/Performance DTCs before diagnosing Control Circuit Open DTCs. Refer to the DIAGNOSTIC CODE INDEX for a complete list of all HVAC related symptoms.
No
1. Go To step 2).
2) RUN THE ACTUATOR DTC DETECTION TEST
With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is complete, select View DTCs.

Does the scan tool display any DTCs?

Yes
1. Diagnose and repair the DTC(s). If multiple DTCs are present, diagnose and repair all short high DTCs first, all short low DTCs second, and all open DTCs last. Refer to the DIAGNOSTIC CODE INDEX for a complete list of all HVAC related symptoms.
No
1. Go To step 3).
3) CHECK FOR A BROKEN REAR MODE DOOR ACTUATOR
Turn the ignition off.

Remove the Rear Mode Door Actuator from the A/C Heater Housing Assembly.

By hand, attempt to rotate the actuator in both directions.

Does the actuator turn in either direction?

Yes
1. Replace the Rear Mode Door Actuator in accordance with the Service Information.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Go To step 4).
4) CHECK THE REAR MODE DOOR & A/C HEATER HOUSING FOR WARPED, WORN, DAMAGED, MISSING, & BROKEN COMPONENTS
Inspect for excessively worn, disconnected, missing, or broken door linkage. Inspect for a damaged or broken A/C Heater Housing Assembly. Inspect for a warped or broken door, and missing door seals. Rotate the door from stop to stop. The door should rotate approximately 155 degrees.

Are there any physical or mechanical problems with the door or housing?

Yes
1. Repair as necessary in accordance with the Service Information.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Replace the Rear Mode Door Actuator in accordance with the Service Information. Then, Go To step 5).
5) RUN THE ACTUATOR THE CALIBRATION TEST
Turn the ignition on.

With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs.

Does the scan tool display: B10A0-PANEL MODE DOOR 2 TRAVEL RANGE TOO LARGE?

Yes
1. Replace the A/C Heater Control in accordance with the Service Information.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Perform BODY VERIFICATION TEST - VER 1 .