Dodge Nitro. Manual - part 285

Fig. 69: Channel 3 Audio Speaker Output Circuit Schematic
Courtesy of CHRYSLER LLC 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

When Monitored:  

Amplifier BUS wake-up. Amplifier reset with scan tool.  

Set Condition:  

The amplifier detects an open condition on the speaker output circuit.  

Diagnostic Test 

1) CHECK FOR AN INTERMITTENT CONDITION 

Turn the ignition on. 

Turn the radio on. 

With the scan tool, erase Amplifier DTCs. 

With the scan tool, reset the amplifier. 

With the scan tool, read Amplifier DTCs. 

Does the scan tool display active: B146D-CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT 
OPEN?  

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.  

Perform BODY VERIFICATION TEST - VER 1 .  

2) CHECK THE OPERATION OF THE AMPLIFIED LEFT FRONT SPEAKER 

Possible Causes 

(X209) AMPLIFIED LEFT FRONT SPEAKER (+) CIRCUIT OPEN
(X299) AMPLIFIED LEFT FRONT SPEAKER (-) CIRCUIT OPEN
AMPLIFIED LEFT FRONT SPEAKER
AMPLIFIER

 

2007 Dodge Nitro R/T 

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

  

Fig. 70: Measuring Voltage Of Amplified Left Front Speaker Circuits In Amplified Left Front 
Speaker Harness Connector 
Courtesy of CHRYSLER LLC 

Turn the ignition off. 

Disconnect the Amplified Left Front Speaker harness connector. 

Turn the ignition on. 

Turn the radio on and turn the volume to mid level. 

With a voltmeter set to read in A/C voltage, measure the voltage of the Amplified Left Front Speaker 
circuits in the Amplified Left Front Speaker harness connector. 

Is the voltage present greater than 1 volt?  

Yes  

Replace the Amplified Left Front Speaker in accordance with the service information.  

Perform BODY VERIFICATION TEST - VER 1 .  

No  

Go to 3).  

3) CHECK THE (X209) AMPLIFIED LEFT FRONT SPEAKER (+) CIRCUIT FOR AN OPEN

 

2007 Dodge Nitro R/T 

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

  

Fig. 71: Measuring Resistance Of (X209) Amplified Left Front Speaker (+) Circuit Between 
Amplifier C1 Harness Connector And Amplified Left Front Speaker Harness Connector 
Courtesy of CHRYSLER LLC 

Turn the ignition off. 

Disconnect the Amplifier C1 harness connector. 

Measure the resistance of the (X209) Amplified Left Front Speaker (+) circuit between the Amplifier C1 
harness connector and the Amplified Left Front Speaker harness connector. 

Is the resistance below 5.0 ohms?  

Yes  

Go to 4).  

No  

Repair the (X209) Amplified Left Front Speaker (+) circuit for an open.  

 

2007 Dodge Nitro R/T 

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

  

Perform BODY VERIFICATION TEST - VER 1 .  

4) CHECK THE (X299) AMPLIFIED LEFT FRONT SPEAKER (-) CIRCUIT FOR AN OPEN 

Fig. 72: Measuring Resistance Of (X299) Amplified Left Front Speaker (-) Circuit Between 
Amplifier C1 Harness Connector And Amplified Left Front Speaker Harness Connector 
Courtesy of CHRYSLER LLC 

Measure the resistance of the (X299) Amplified Left Front Speaker (-) circuit between the Amplifier C1 
harness connector and the Amplified Left Front Speaker harness connector. 

Is the resistance below 5.0 ohms?  

Yes  

Replace the amplifier in accordance with the service information.  

Perform BODY VERIFICATION TEST - VER 1 .  

No  

 

2007 Dodge Nitro R/T 

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