Dodge Nitro. Manual — part 291

Fig. 86: Channel 4 Audio Speaker Output Circuit Schematic
Courtesy of CHRYSLER LLC

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

With the ignition on. Radio volume at 25 or higher.

Set Condition:

The amplifier detects that the output circuits are shorted together.

Diagnostic Test

1) CHECK FOR AN INTERMITTENT CONDITION

Turn the ignition on, then off, and then on again.

With the scan tool, erase Amplifier DTCs.

Turn the radio on.

Turn the volume level to 25.

With the scan tool, read Amplifier DTCs.

Does the scan tool display active: B1473-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT
SHORTED TOGETHER?

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 RIGHT FRONT SPEAKER

Possible Causes

(X208) AMPLIFIED RIGHT FRONT SPEAKER (+) CIRCUIT SHORTED TO THE (X298)
AMPLIFIED RIGHT FRONT SPEAKER (-) CIRCUIT
AMPLIFIED RIGHT FRONT SPEAKER
AMPLIFIER

2007 Dodge Nitro R/T

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

Turn the ignition off.

Disconnect the Amplified Right Front Speaker.

Measure the resistance of the speaker between the two terminals.

Is the resistance of the speaker less than 1 ohm?

Yes

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

Perform BODY VERIFICATION TEST - VER 1 .

No

Go to 3).

3) CHECK THE (X208) AMPLIFIED RIGHT FRONT SPEAKER (+) CIRCUIT, AND THE
(X298) AMPLIFIED RIGHT FRONT SPEAKER (-) CIRCUITS FOR A SHORT TOGETHER

2007 Dodge Nitro R/T

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

Fig. 87: Measuring Resistance Between (X208) Amplified Right Front Speaker (+) Circuit And
(X298) Amplified Right Front Speaker (-) Circuit
Courtesy of CHRYSLER LLC

Disconnect the Amplifier C1 harness connector.

Measure the resistance between the (X208) Amplified Right Front Speaker (+) circuit, and the (X298)
Amplified Right Front Speaker (-) circuit.

Is the resistance below 10K ohms?

Yes

Repair the (X208) Amplified Right Front Speaker (+) circuit, and the (X298) Amplified Right
Front Speaker (-) circuit for a short together.

Perform BODY VERIFICATION TEST - VER 1 .

No

Replace the amplifier in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

B1474-CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT PERFORMANCE

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

With the ignition on.

Set Condition:

This DTC will set if a DC offset occurs on the output channel, the amplifier shall set a DTC after a
maturity rate of 5 ±1 sec.

Diagnostic Test

1) CHECK FOR AN INTERMITTENT CONDITION

Turn the ignition on, then off, and then on again.

With the scan tool, read Amplifier DTCs.

Does the scan tool display active: B1474-CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT
PERFORMANCE?

Possible Causes

AMPLIFIER

2007 Dodge Nitro R/T

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

Yes

Replace the amplifier in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1 .

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 .

B1475-CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT LOW

2007 Dodge Nitro R/T

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