Diagnostic Test

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

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

With the scan tool, read active HVAC DTCs.

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

Yes
1. Diagnose and repair the DTC(s). Refer to the DIAGNOSTIC CODE INDEX for a complete list of all HVAC related symptoms.
No
1. Go To 2).
2) CHECK THE RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE

Fig 1: Measuring Resistance Between Recirculation Door Driver & Recirculation Door Common Driver Circuits
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the A/C Heater Control C2 harness connector.

Measure the resistance between the (C268) Recirculation Door Driver circuit and the (C68) Recirculation Door Common Driver circuit in the A/C Heater Control C2 harness connector.

Is the resistance above 70.0 ohms?

Yes
1. Go To 3).
No
1. Replace the A/C Heater Control in accordance with the Service Information.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING) .
3) CHECK THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT FOR AN OPEN

Fig 2: Checking Recirculation Door Driver (B) Circuit For Open
Courtesy of DAIMLERCHRYSLER CORP.

Disconnect the Recirculation Door Actuator harness connector.

Measure the resistance of the (C268) Recirculation Door Driver circuit between the Recirculation Door Actuator harness connector and the A/C Heater Control C2 harness connector.

Is the resistance below 5.0 ohms?

Yes
1. Go To 4).
No
1. Repair the (C268) Recirculation Door Driver circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING) .
4) CHECK THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT FOR AN OPEN

Fig 3: Checking Recirculation Door Driver (A) Circuit For Open
Courtesy of DAIMLERCHRYSLER CORP.

Measure the resistance of the (C68) Recirculation Door Common Driver circuit between the Recirculation Door Actuator harness connector and the A/C Heater Control C2 harness connector.

Is the resistance below 5.0 ohms?

Yes
1. Replace the Recirculation Door Actuator in accordance with the Service Information.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING) .
No
1. Repair the (C68) Recirculation Door Common Driver circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING) .