Diagnostic Test

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: B1478-CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER? 

Yes 

1. Go To  2).

No 

1. 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.
2. Perform BODY VERIFICATION TEST - VER 1 .

Fig 1: Checking Resistance Of Speaker Terminals

Courtesy of CHRYSLER LLC

Disconnect the Amplified Left Rear Speaker.

Measure the resistance of the speaker between the two terminals.

Is the resistance of the speaker less than 1 ohm? 

Yes 

1. Replace the Amplified Left Rear Speaker in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .

No 

1. Go To  3).

Fig 2: Checking (X205) Amplified Left Rear Speaker (+) Circuit And (X295) Amplified Left Rear Speaker (-) Circuit

Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Amplifier C2 harness connector.

Measure the resistance between the (X205) Amplified Left Rear Speaker (+) circuit, and the (X295) Amplified Left Rear Speaker (-) circuit.

Is the resistance below 10K ohms? 

Yes 

1. Repair the (X205) Amplified Left Rear Speaker (+) circuit, and the (X295) Amplified Left Rear Speaker (-) circuit for a short together.
2. Perform BODY VERIFICATION TEST - VER 1 .

No 

1. Replace the amplifier in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .