Dodge Nitro. Manual — part 710

No

Go to 4).

4) CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE

Fig. 39: Measuring Resistance Between (C32) Recirculation Door Driver Circuit And (C154)
Common Door Driver 2 Circuit In A/C Heater Control C1 Harness Connector
Courtesy of CHRYSLER LLC

Reconnect the Recirculation Door Actuator harness connector.

Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C154) Common
Door Driver 2 circuit in the A/C Heater Control C1 harness connector.

Is the resistance between 30 and 40 ohms?

Yes

Replace the Recirculation Door Actuator in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

No

Replace the A/C Heater Control in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

B105C-RECIRCULATION DOOR TRAVEL RANGE TOO SMALL

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

The A/C Heater Control calibrates each actuator individually. Automatic calibration occurs upon power up after
installing a new A/C Heater Control. Manual calibration occurs by sending a command with the scan tool. The
purpose of actuator calibration is to determine the total span of door travel between physical stops. To calibrate
the actuator, the A/C Heater Control first moves the door to its soft stop, and then counts the number of pulses it
takes to move the door to its other stop. An expected range of span is stored in the control's memory. If the
measured calibration value is less than the expected range for this actuator, this DTC will set. Note that the
control clears all stored calibration faults at the beginning of the calibration procedure.

When Monitored:

During actuator calibration.

Set Condition:

If the total span of the Recirculation Door is less than the low range limit.

Diagnostic Test

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 CONTROL CIRCUIT/PERFORMANCE or CONTROL
CIRCUIT OPEN DTCs?

Yes

Diagnose and repair the DTC(s). If present, diagnose and repair all Rear Blend and Rear Mode
Door Control Circuit/Performance DTCs first, all other Control Circuit/Performance DTCs second,
and all Control Circuit Open DTCs last. Refer to the DIAGNOSTIC CODE INDEX for a
complete list of all HVAC related symptoms.

No

Go to 2).

2) INSPECT ACTUATOR & HOUSING ASSEMBLY FOR A CONDITION CAUSING THE
DOOR TO SEIZE OR BIND

Possible Causes

DOOR DRIVER ELECTRICAL CIRCUIT(S)
RECIRCULATION DOOR SEIZED, BINDING, OBSTRUCTED
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

Turn the ignition off.

Inspect the actuator and the housing assembly for a condition causing the door to seize or bind.

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

Yes

Repair as necessary in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

No

Go to 3).

3) CHECK RECIRCULATION DOOR TRAVEL

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

By hand, attempt to rotate the door in both directions. The door should operate smoothly in both
directions over approximately 70 degrees of travel.

Does the door operate smoothly in both directions over approximately 70 degrees of travel?

Yes

Replace the Recirculation Door Actuator in accordance with the service information. Then, go to
4).

No

Repair as necessary in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

4) RUN THE ACTUATOR 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 this DTC as active?

Yes

Replace the A/C Heater Control in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

No

Perform BODY VERIFICATION TEST - VER 1 .

B105D-RECIRCULATION DOOR TRAVEL RANGE TOO LARGE

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

The A/C Heater Control calibrates each actuator individually. Automatic calibration occurs upon power up after
installing a new A/C Heater Control. Manual calibration occurs by sending a command with the scan tool. The
purpose of actuator calibration is to determine the total span of door travel between physical stops. To calibrate
the actuator, the A/C Heater Control first moves the door to its soft stop, and then counts the number of pulses it
takes to move the door to its other stop. An expected range of span is stored in the control's memory. If the
measured calibration value exceeds the expected range for this actuator, this DTC will set. Note that the control
clears all stored calibration faults at the beginning of the calibration procedure.

When Monitored:

During actuator calibration.

Set Condition:

If the total span of the Recirculation Door exceeds the high range limit.

Diagnostic Test

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 CONTROL CIRCUIT/PERFORMANCE or CONTROL
CIRCUIT OPEN DTCs?

Yes

Diagnose and repair the DTC(s). If present, diagnose and repair all Rear Blend and Rear Mode

Possible Causes

DOOR DRIVER ELECTRICAL CIRCUIT(S)
RECIRCULATION DOOR OR A/C HEATER HOUSING COMPONENTS WARPED, WORN,
DAMAGED, MISSING, BROKEN
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro