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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Audio (Radio) - Electrical Diagnostics >> DTC Troubleshooting >> B1401-Front Left Audio Speaker Output Circuit Low >> Diagnostic Test

Diagnostic Test

  1. 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.
    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: B1401-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT LOW?

      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 .
  2. LEFT FRONT SPEAKERS 
    Fig 1: Left Front Speakers Connector End Views
    GC0151977Courtesy of CHRYSLER GROUP, LLC
    1. Make sure one of the front doors is still open.
    2. Using the scan tool, erase the DTCs.
    3. Turn the ignition off.
    4. Disconnect the Left Front Speaker harness connector from the Left Front Speaker.
    5. Disconnect the Left Front Tweeter harness connector from the Left Front Tweeter.
    6. Turn the ignition on.
    7. Turn the radio on.
    8. Using the scan tool, read the active Radio DTCs.

      Does the scan tool read: B1401-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT LOW?

      Yes 

      • Go To  4

      No 

      • Go To  3
  3. LEFT FRONT SPEAKER 
    Fig 2: Left Front I/P Speaker Connector End View
    GC0151979Courtesy of CHRYSLER GROUP, LLC
    1. Make sure one of the front doors is still open.
    2. Using the scan tool, erase the DTCs.
    3. Turn the ignition off.
    4. Re-connect the Left Front Speaker harness connector to the Left Front Speaker.
    5. Turn the ignition on.
    6. Turn the radio on.
    7. Using the scan tool, read the active Radio DTCs.

      Does the scan tool read: B1401-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT LOW?

      Yes 

      • Replace the Left Front Speaker in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace the Left Front Tweeter in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. CHECK THE (X201) LEFT FRONT SPEAKER (+) CIRCUIT FOR A SHORT TO GROUND 
    Fig 3: Checking Left Front Speaker (+) Circuit For A Short To Ground
    GC0151981Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Radio C2 harness connector.
    3. Measure the resistance between ground and the (X201) Left Front Speaker (+) circuit.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the (X201) Left Front Speaker (+) circuit for a short to ground.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  5
  5. CHECK THE (X291) LEFT FRONT SPEAKER (-) CIRCUIT FOR A SHORT TO GROUND 
    Fig 4: Checking Left Front Speaker (-) Circuit For A Short To Ground
    GC0151984Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (X291) Left Rear Speaker (-) circuit.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the (X291) Left Rear Speaker (-) for a short to ground.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace the Radio in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .