Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN INTERMITTENT CONDITION
NOTE:
This vehicle has a Front Tweeter wired in parallel with the Front Speaker.
1. Turn the ignition on and open one of the front doors.
  NOTE:
  A front door must remain open whenever checking or erasing Radio DTCs.
2. Using the scan tool, record and erase the Radio DTCs.
3. Turn the Radio on.
4. Adjust the speakers to the front and center.
5. Using the scan tool, read the active Radio DTCs.
  Does the scan tool read: B1403-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT OPEN?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE LEFT FRONT SPEAKER

Fig 1: Checking Resistance Of Left Front Speaker
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Left Front Speaker.
3. Measure the resistance of the speaker between the two terminals.
  NOTE:
  The graphic shows the connector for reference only. Measure between the speaker terminals.
  
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Replace the Left Front Speaker in accordance with the Service Information. An open Tweeter will not set this code.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECK THE (X201) LEFT FRONT SPEAKER (+) CIRCUIT FOR AN OPEN

Fig 2: Checking Left Front Speaker (+) Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the Radio C2 harness connector.
2. Measure the resistance of the (X201) Left Front Speaker (+) circuit between the Radio C2 connector, and the Left Front Speaker harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair an open in the (X201) Left Front Speaker (+) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (X291) LEFT FRONT SPEAKER (-) CIRCUIT FOR AN OPEN

Fig 3: Checking Left Front Speaker (-) Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (X291) Left Front Speaker (-) circuit between the Radio C2 connector, and the Left Front Speaker harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Radio in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair an open in the (X291) Left Front Speaker (-) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .