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 front and center.
6. Using the scan tool, read the active Amplifier DTCs.
  Does the scan tool display active: B146B-CHANNEL 3 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 .
LEFT FRONT SPEAKER

Fig 1: Left Front 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 Left Front 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 active: B146B-CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT LOW?
  
  Yes
  - Go To 3
  No
  - Replace the Left Front Door Speaker.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (X201) LEFT FRONT SPEAKER (+) CIRCUIT FOR A SHORT TO GROUND

Fig 2: Measuring Resistance Between Ground & Left Front Speaker (+) Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Amplifier C2 harness connector.
3. Measure the resistance between ground and the (X201) Left Front Speaker (+) circuit.
  Is the resistance below 10K 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 4
CHECK THE (X291) LEFT FRONT SPEAKER (-) CIRCUIT FOR A SHORT TO GROUND

Fig 3: Measuring Resistance Between Ground & Left Front Speaker (-) Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between ground and the (X291) Left Front Speaker (-) circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (X291) Left Front Speaker (-) for a short to ground.
  - 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 .