Diagnostic Test

Turn the ignition on.

With the scan tool, clear all Audio DTC's.

Turn the radio on.

With the scan tool, read the DTC information.

Does the scan tool read: B1403-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT OPEN? 

Yes 

1. Go To  2).

No 

1. The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Refer to SYSTEM WIRING DIAGRAMS
2. Perform the BODY VERIFICATION TEST - VER 1 .

Fig 1: (X201) (X291) SPEAKER OUTPUT CIRCUITS

Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Radio C1 harness connector.

Disconnect the Front Left Audio Speaker connector.

Measure the resistance of each speaker (X201)(+) and (X291)(-) circuit between the radio and the speaker.

Is the resistance below 5.0 ohms for each circuit? 

Yes  

1. Go To  3).

No  

1. Repair the applicable output speaker circuit for an open condition.
2. Perform the BODY VERIFICATION TEST - VER 1 .

Fig 2: Left Front Door Speaker Connector

Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Front Left Audio Speaker.

Turn the ignition on.

Turn the radio on.

With the scan tool, clear all Audio DTC's.

With the scan tool, read the DTC information.

Does the scan tool read: B1403-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT OPEN? 

Yes 

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

No 

1. Test Complete.