Dodge Nitro. Manual - part 302

1) TEST FOR INTERMITTENT CONDITION 

Turn the ignition on. 

With the scan tool, record and erase DTCs. 

Cycle the ignition from on to off 3 times. 

Turn the ignition on. 

With the scan tool, read DTCs. 

Does the scan tool display: U0020-CAN INTERIOR BUS OFF PERFORMANCE?  

Yes  

Go to 2).  

No  

The conditions that caused this code to set are not present at this time. Using the wiring 
diagram/schematic as a guide, inspect the wiring and connectors.  

Perform BODY VERIFICATION TEST - VER 1 .  

2) CHECK FRONT CONTROL MODULE DTCs 

With the scan tool, read Totally Integrated Power Module DTCs. 

Does the scan tool display any CAN INTERIOR BUS DTCs - ACTIVE?  

Yes  

Refer to the symptom list for problems related to Communication in the ELECTRONIC 
CONTROL MODULES - ELECTRICAL DIAGNOSTICS article .  

No  

Go to 3).  

3) CAN INTERIOR BUS (+) CIRCUIT OPEN 

Turn the ignition off. 

Disconnect the Amplifier C1 harness connector. 

Disconnect the Totally Integrated Power Module C7 harness connector. 

Measure the resistance of the (D265) CAN INTERIOR BUS (+) circuit between the Totally Integrated 

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Audio/Video Systems - Electrical Diagnostics - Nitro

  

Power module C7 harness connector and the Amplifier C1 harness connector. 

Is the resistance below 2.0 ohms?  

Yes  

Go to 4).  

Perform BODY VERIFICATION TEST - VER 1 .  

No  

Repair the CAN INTERIOR BUS (+) circuit for an open.  

Perform BODY VERIFICATION TEST - VER 1 .  

4) CAN INTERIOR BUS (-) CIRCUIT OPEN 

Measure the resistance of the (D264) CAN INTERIOR BUS (-) circuit between the Totally Integrated 
Power Module C7 harness connector and the Amplifier C1 harness connector. 

Is the resistance below 2.0 ohms?  

Yes  

Replace the Amplifier in accordance with the service information.  

Perform BODY VERIFICATION TEST - VER 1 .  

No  

Repair the CAN INTERIOR BUS (-) circuit for an open.  

Perform BODY VERIFICATION TEST - VER 1 .  

U0151-LOST COMMUNICATION WITH OCCUPANT RESTRAINT CONTROLLER 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure. 

U0154-LOST COMMUNICATION WITH OCCUPANT CLASSIFICATION MODULE 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure. 

U0184-LOST COMMUNICATION WITH RADIO 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Audio/Video Systems - Electrical Diagnostics - Nitro

  

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

U0186-LOST COMMUNICATION WITH AUDIO AMPLIFIER 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure. 

U0195-LOST COMMUNICATION WITH SDAR 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure. 

U0197-LOST COMMUNICATION WITH HANDS FREE MODULE 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure. 

U0199-LOST COMMUNICATION WITH DRIVERS DOOR MODULE 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure. 

U0200-LOST COMMUNICATION WITH PASSENGER DOOR MODULE 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Audio/Video Systems - Electrical Diagnostics - Nitro

  

2007 ACCESSORIES AND EQUIPMENT

Audio/Video - Service Information - Nitro 

AUDIO/VIDEO-SERVICE INFORMATION 

DESCRIPTION 

AUDIO 

Several combinations of radio receivers and speaker systems are offered on this model. The audio system uses 
an ignition switched source of battery current so that the system will only operate when the ignition switch is in 
the RUN or ACCESSORY positions. 

The audio system includes the following components: 



Antenna  



Power amplifier  



Radio noise suppression components  



Radio receiver  



Remote radio switches (if equipped)  



Speakers  



Subwoofer  

Certain functions and features of the audio system rely upon resources shared with other electronic modules in 
the vehicle over the Controlled Area Network (CAN). The data bus network allows the sharing of sensor 
information. For diagnosis of these electronic modules or of the data bus network, the use of a scan tool and the 
proper Diagnostic Procedures information is recommended. 

OPERATION 

OPERATION 

The audio system components are designed to provide audio entertainment and information through the 
reception, tuning and amplification of locally broadcast radio signals in both the Amplitude Modulating (AM) 
and Frequency Modulating (FM) commercial frequency ranges. 

The audio system components operate on battery current received through a fuse in the Totally Integrated 
Power Module (TIPM) on a fused ignition switch output (RUN-ACC) circuit so that the system will only 
operate when the ignition switch is in the Run or Accessory positions. 

On vehicles that are equipped with the optional remote radio switches, the Cab Compartment Node (CCN) 
receives hard wired resistor multiplexed inputs from the remote radio switches. The programming in the CCN 
allows it to process those inputs and send the proper messages to the radio receiver over the Controlled Area 
Network (CAN) to control the radio volume up or down, station seek up or down, preset station advance, and 

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Audio/Video - Service Information - Nitro

  

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Audio/Video - Service Information - Nitro