Dodge Nitro. Manual — part 703

Fig. 21: Measuring Resistance Of (C154) Common Door Driver Circuit Between A/C Heater
Control C1 Harness Connector And Mode Door Actuator Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the A/C Heater Control C1 harness connector.

Disconnect the Mode Door Actuator harness connector.

Measure the resistance of the (C154) Common Door Driver circuit between the A/C Heater Control C1
harness connector and the Mode Door Actuator harness connector.

Does the ohm meter read open circuit?

Yes

Repair the (C154) Common Door Driver circuit for an open.

Perform BODY VERIFICATION TEST - VER 1 .

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

No

Go to 3).

3) CHECK (C35) MODE DOOR DRIVER CIRCUIT FOR AN OPEN

Fig. 22: Measuring Resistance Of (C35) Mode Door Driver Circuit Between A/C Heater Control C1
Harness Connector And Mode Door Actuator Harness Connector
Courtesy of CHRYSLER LLC

Measure the resistance of the (C35) Mode Door Driver circuit between the A/C Heater Control C1
harness connector and the Mode Door Actuator harness connector.

Does the ohm meter read open circuit?

Yes

Repair the (C35) Mode Door Driver circuit for an open.

Perform BODY VERIFICATION TEST - VER 1 .

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

No

Go to 4).

4) CHECK MODE DOOR ACTUATOR CIRCUIT RESISTANCE

Fig. 23: Measuring Resistance Between (C35) Mode Door Driver Circuit And (C154) Common
Door Driver Circuit In A/C Heater Control C1 Harness Connector
Courtesy of CHRYSLER LLC

Reconnect the Mode Door Actuator harness connector.

Measure the resistance between the (C35) Mode Door Driver circuit and the (C154) Common Door
Driver circuit in the A/C Heater Control C1 harness connector.

Is the resistance between 30 and 40 ohms?

Yes

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

No

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

Perform BODY VERIFICATION TEST - VER 1 .

B1044-PANEL MODE DOOR 1 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 Mode 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)
MODE DOOR SEIZED, BINDING, OBSTRUCTED
MODE DOOR ACTUATOR
A/C HEATER CONTROL

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro