Dodge Nitro. Manual — part 716

No

Go to 4).

4) CHECK LEFT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE

Fig. 55: Measuring Resistance Between (C54) Driver Blend Door Driver Circuit And (C154)
Common Door Driver Circuit In A/C Heater Control C1 Harness Connector
Courtesy of CHRYSLER LLC

Reconnect the Left Blend Door Actuator harness connector.

Measure the resistance between the (C54) Driver 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

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 .

B10B1-INFRARED SENSOR THERMISTOR CIRCUIT HIGH

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

When Monitored:

With the ignition on.

Set Condition:

If the IR Sensor fails the internal self test.

Diagnostic Test

1) REPLACE THE A/C HEATER CONTROL

Repair

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

Perform BODY VERIFICATION TEST - VER 1 .

B10B4-CABIN HEATER 1 CONTROL CIRCUIT LOW (TIPM)

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

With the ignition on, the Cabin Heater Relay energized.

Set Condition:

If the Totally Integrated Power Module (TIPM) detects that the (K360) Cabin Heater 1 Relay Control
circuit is shorted to ground.

Diagnostic Test

Possible Causes

A/C HEATER CONTROL

NOTE:

This DTC must be active for the results of this test to be valid. Do not perform
this test if this DTC is stored. Refer to HVAC System Test (ATC) for stored DTC
test procedures.

Possible Causes

(K360) CABIN HEATER 1 RELAY CONTROL CIRCUIT SHORTED TO GROUND
(K360) CABIN HEATER 1 RELAY CONTROL CIRCUIT OPEN
CABIN HEATER RELAY
TOTALLY INTEGRATED POWER MODULE (TIPM)

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

1) VERIFY THAT THE DTC IS ACTIVE

Turn the ignition on.

With the scan tool, erase DTCs.

With the scan tool, actuate the Cabin Heater Relay.

Monitor the scan tool for at least two minutes.

With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

Go to 2).

No

The condition that caused this symptom is currently not present. Check for an intermittent
condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken
wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or
contaminated terminals. Repair as necessary.

2) CHECK (K360) CABIN HEATER 1 RELAY CONTROL CIRCUIT FOR A SHORT TO
GROUND

Turn the ignition off.

Disconnect the TIPM C1 harness connector.

Remove the Cabin Heater Relay.

Measure the resistance between ground and the (K360) Cabin Heater 1 Relay Control circuit in the TIPM
C1 harness connector.

Does the ohm meter read open circuit?

WARNING:

When the engine is operating, do not stand in direct line with the fan,
do not put your hands near the pulleys, belts or fan. Do not wear
loose clothing.

NOTE:

Before erasing stored DTCs, record these conditions. Attempting to
duplicate these conditions may assist when checking for an active DTC.

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

Yes

Repair the (K360) Cabin Heater 1 Relay Control circuit for a short to ground.

Perform BODY VERIFICATION TEST - VER 1 .

No

Go to 3).

3) CHECK (K360) CABIN HEATER 1 RELAY CONTROL CIRCUIT FOR AN OPEN

Measure the resistance of the (K360) Cabin Heater 1 Relay Control circuit between the Cabin Heater
Relay connector and the TIPM C1 harness connector.

Does the ohm meter read open circuit?

Yes

Repair the (K360) Cabin Heater 1 Relay Control circuit for an open.

Perform BODY VERIFICATION TEST - VER 1 .

No

Go to 4).

4) CHECK PTC NO. 1 RELAY

Install the FCM.

Install a substitute PTC No. 1 Relay in place of the vehicle's PTC No. 1 Relay.

Turn the ignition on.

With the scan tool, erase FCM DTCs.

With the scan tool, actuate the PTC No. 1 Relay.

Monitor the scan tool for at least two minutes.

With the scan tool, read FCM DTCs.

Is the status Active for this DTC?

Yes

Go to 5).

No

2007 Dodge Nitro R/T

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro