Dodge Nitro. Manual - part 718

Were any problems found?  

Yes  

Repair as necessary.  

Perform BODY VERIFICATION TEST - VER 1 .  

No  

Replace the Front Control Module (FCM) in accordance with the Service Information.  

Perform BODY VERIFICATION TEST - VER 1 .  

B10B9-CABIN HEATER 2 CONTROL CIRCUIT HIGH (TIPM) 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

When Monitored: 

With the ignition on, the ASD Relay energized, and the PTC No. 2 Relay command on. 

Set Condition: 

If the Front Control Module (FCM) detects that the (K361) PTC No. 2 Relay Control circuit voltage is 
shorted to voltage. 

Diagnostic Test 

1) VERIFY THAT THE DTC IS ACTIVE 

Possible Causes 

(K361) PTC NO. 2 RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE
(K361) PTC NO. 2 RELAY CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
PTC NO. 2 RELAY
FRONT CONTROL MODULE (FCM)

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:

If the FCM detects and stores a DTC, the FCM also stores the 
environmental conditions under which the DTC was set.

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

  

Turn the ignition on. 

With the scan tool, erase FCM DTCs. 

With the scan tool, actuate the PTC No. 2 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 2).  

No  

Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, 
pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed 
out, spread, corroded, or contaminated terminals.  

2) CHECK PTC NO. 2 RELAY 

With the scan tool, erase FCM DTCs. 

Turn the ignition off. 

Remove the PTC No. 2 Relay. 

Turn the ignition on. 

With the scan tool, actuate the PTC No. 2 Relay. 

With the scan tool, read FCM DTCs. 

Does the scan tool display: B10B9-CABIN HEATER 2 CONTROL CIRCUIT HIGH?  

Yes  

Go to 3).  

No  

NOTE:

The scan tool should display an open circuit DTC with the PTC No. 2 Relay 
removed.

 

2007 Dodge Nitro R/T 

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

  

Replace the PTC No. 2 Relay in accordance with the Service Information.  

Perform BODY VERIFICATION TEST - VER 1 .  

3) CHECK (K361) PTC NO. 2 RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE 

Turn the ignition off. 

Disconnect the FCM from the Power Module. 

Remove the ASD Relay from the IPM. 

Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay Connector. 

Turn the ignition on. 

Measure the voltage of the (K361) PTC No. 2 Relay Control circuit in the PTC No. 2 Relay connector. 

Is there any voltage present?  

Yes  

Repair the (K361) PTC No. 2 Relay Control circuit for a short to voltage.  

Perform BODY VERIFICATION TEST - VER 1 .  

No  

Go to 4).  

4) CHECK (K361) PTC NO. 2 RELAY CONTROL FOR AN OPEN OR HIGH RESISTANCE 

Turn the ignition off. 

Measure the resistance of the (K361) PTC No. 2 Relay Control circuit between the PTC No. 2 Relay 
connector and the FCM connector. 

Is the resistance below 10.0 ohms?  

Yes  

Go to 5).  

No  

Repair the (K361) PTC No. 2 Relay Control circuit for an open or high resistance.  

Perform BODY VERIFICATION TEST - VER 1 .  

5) INSPECT RELATED WIRING & CHECK FOR TSBs

 

2007 Dodge Nitro R/T 

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro

  

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the PTC No. 2 
Relay and the FCM. 

Look for any chafed, pierced, pinched, or partially broken wires. 

Look for broken, bent, pushed out or corroded terminals. 

Refer to any Technical Service Bulletins that may apply. 

Were any problems found?  

Yes  

Repair as necessary.  

Perform BODY VERIFICATION TEST - VER 1 .  

No  

Replace the FCM in accordance with the Service Information.  

Perform BODY VERIFICATION TEST - VER 1 .  

B10EA-BLOWER MOTOR CONTROL CIRCUIT HIGH 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

When Monitored: 

With the ignition on. Battery voltage greater than 10.4 volts. TIPM requesting Blower Motor operation. 

Set Condition: 

If the Totally Integrated Power Module (TIPM) detects a short to voltage condition on the (C7) Blower 
Motor Control circuit. 

Diagnostic Test 

1) VERIFY DTC IS ACTIVE 

Turn the ignition on. 

Possible Causes 

(C7) BLOWER MOTOR CONTROL CIRCUIT SHORTED TO VOLTAGE
(C7) BLOWER MOTOR CONTROL CIRCUIT OPEN
BLOWER MOTOR
TOTALLY INTEGRATED POWER MODULE (TIPM)

 

2007 Dodge Nitro R/T 

2007 HVAC Heating & Air Conditioning - Electrical Diagnostics - Nitro