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 ACTIVE DTC
1. Turn the ignition on and open one of the front doors.
  NOTE:
  A front door must remain open whenever checking or erasing Amplifier DTCs.
2. With the scan tool, read Amplifier DTCs and record on the repair order.
3. With the scan tool, erase DTCs.
4. Cycle the ignition switch from on to off, wait five seconds and then back to on.
5. Turn the Radio on.
6. Adjust the speakers to the rear and center.
7. With the scan tool, read Amplifier DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - 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. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE SUBWOOFER SPEAKER
1. Turn the ignition off.
2. Disconnect the Subwoofer Speaker harness connector.
3. Measure the resistance between the (X305) Subwoofer 3 input (+) circuit, and the (X395) Subwoofer 3 Input (-) circuit at the Subwoofer.
  Is the resistance of the speaker less than 1.0 Ohm?
  
  Yes
  - Replace the Subwoofer Speaker in accordance with the Service Information. Refer to SPEAKER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECK THE (X305) SUBWOOFER 3 INPUT (+) CIRCUIT, AND THE (X395) SUBWOOFER 3 INPUT (-) CIRCUITS FOR A SHORT TOGETHER
1. Turn the ignition off.
2. Disconnect the Amplifier C1 harness connector.
3. Check for continuity between the (X305) Subwoofer 3 Input (+) circuit and the (X395) Subwoofer 3 Input (-) circuit at the Amplifier C1 harness connector.
  Is there continuity between the (X305) Subwoofer 3 Input (+) circuit and the (X395) Subwoofer 3 Input (-) circuit?
  
  Yes
  - Repair the (X305) Subwoofer 3 Input (+) circuit, and the (X395) Subwoofer 3 input (-) circuit for a short together.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Amplifier in accordance with the Service Information. Refer to AMPLIFIER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .