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