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: B1485-CHANNEL 8 AUDIO SPEAKER OUTPUT CIRCUIT HIGH?
  
  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 FOR VOLTAGE ON THE (X301) AMPLIFIED SUBWOOFER 2 (+) CIRCUIT

Fig 1: Measuring Voltage Between Amplified Subwoofer 2 (+) Circuit & Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Amplifier C2 harness connector.
3. Turn the ignition on.
4. Measure the voltage between the (X301) Amplified Subwoofer 2 (+) circuit and ground.
  Is there any voltage present?
  
  Yes
  - Repair the (X301) Amplified Subwoofer 2 (+) circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECK FOR VOLTAGE ON THE (X391) AMPLIFIED SUBWOOFER 2 (-) CIRCUIT

Fig 2: Measuring Voltage Between Amplified Subwoofer 2 (-) Circuit & Ground
Courtesy of CHRYSLER GROUP, LLC
1. Measure the voltage between the (X391) Amplified Subwoofer 2 (-) circuit and ground.
  Is there any voltage present?
  
  Yes
  - Repair the (X391) Amplified Subwoofer 2 (-) circuit for a short to voltage.
  - 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 .