Dodge Nitro. Manual — part 708

Fig. 35: Measuring Resistance Between (C54) Blend Door Driver Circuit And (C154) Common
Door Driver Circuit In A/C Heater Control C1 Harness Connector
Courtesy of CHRYSLER LLC

Measure the resistance between the (C54) Blend 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

Go to 13).

No

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

Perform BODY VERIFICATION TEST - VER 1 .

13) RUN THE ACTUATOR CALIBRATION TEST

Reconnect the A/C Heater Control C1 harness connector.

Turn the ignition on.

With the scan tool, erase HVAC DTCs.

Turn the ignition off, wait 10 seconds, and then 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.

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

Does the scan tool only display: B1058-RECIRCULATION DOOR CONTROL
CIRCUIT/PERFORMANCE?

Yes

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

Perform BODY VERIFICATION TEST - VER 1 .

No, Other DTC(s) Displayed

Diagnose and repair the other DTC(s). Refer to the DIAGNOSTIC CODE INDEX for a complete
list of all HVAC related symptoms.

No, And No Other DTCs Displayed

Using the wiring diagram as a guide, inspect the wiring and connectors for conditions causing an
intermittent short. Repair as necessary.

Perform BODY VERIFICATION TEST - VER 1 .

B105B-RECIRCULATION DOOR CONTROL CIRCUIT OPEN (TIPM)

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

When actuator movement is requested.

Set Condition:

If the (C268) Recirculation Door Driver circuit or the (C68) Recirculation Door Common Driver circuit is
open.

Diagnostic Test

1) CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE DTCs

Turn the ignition on.

With the scan tool, read active HVAC DTCs.

Possible Causes

(C268) RECIRCULATION DOOR DRIVER CIRCUIT OPEN
(C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT OPEN
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

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

Yes

Diagnose and repair the DTC(s). Refer to the DIAGNOSTIC CODE INDEX for a complete list of
all HVAC related symptoms.

No

Go to 2).

2) CHECK THE RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE

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

Go to 3).

No

Replace the A/C Heater Control in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1 .

3) CHECK THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT FOR AN OPEN

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

Go to 4).

No

Repair the (C268) Recirculation 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

4) CHECK THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT FOR AN
OPEN

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

Replace the Recirculation Door Actuator in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1 .

No

Repair the (C68) Recirculation Door Common Driver circuit for an open.

Perform BODY VERIFICATION TEST - VER 1 .

B105B-RECIRCULATION DOOR CONTROL CIRCUIT OPEN

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro