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
1. Turn the ignition on.
2. Using the scan tool, record and erase the Amplifier DTCs.
3. Cycle the ignition switch from on to off, wait five seconds and then back to on.
4. Turn the Radio on and set the volume to 25.
5. Adjust the speakers to the rear and center.
6. Using the scan tool, read the active Amplifier DTCs.
  Does the scan tool display: B1487-CHANNEL 8 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER?
  
  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 OPERATION OF THE AMPLIFIED SUBWOOFER SPEAKER

Fig 1: Subwoofer Speaker Harness Connector End View
Courtesy of CHRYSLER GROUP, LLC
1. Using the scan tool, erase the DTCs.
2. Turn the ignition off.
3. Disconnect the Subwoofer Speaker harness connector.
4. Turn the ignition on.
5. Turn the radio on and set the volume to 25.
6. Using the scan tool, read the active Amplifier DTCs.
  Does the scan tool display: B1487-CHANNEL 8 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER?
  
  Yes
  - Go To 3
  No
  - Replace the Amplified Subwoofer Speaker Assembly in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (X301) AMPLIFIED SUBWOOFER 2 (+) CIRCUIT AND THE (X391) AMPLIFIED SUBWOOFER 2 (-) CIRCUITS FOR A SHORT TOGETHER

Fig 2: Measuring Resistance Between Amplified Subwoofer 2 (+) Circuit & Amplified Subwoofer 2 (-) Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Amplifier C2 harness connector.
3. Measure the resistance between the (X301) Amplified Subwoofer 2 (+) circuit and the (X391) Amplified Subwoofer 2 (-) circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (X301) Amplified Subwoofer 2 (+) circuit for a short to the (X391) Amplified Subwoofer 2 (-) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Amplifier in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .