Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. 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.
5. Adjust the speakers to the front and center.
6. Using the scan tool, read the active Amplifier DTCs.
  Is this DTC active?
  
  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. Repair as necessary. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE OPERATION OF THE AMPLIFIED LEFT REAR DOOR SPEAKER
1. Turn the ignition off.
2. Disconnect the Amplified Left Rear Door Speaker harness connector.
3. Measure the resistance of the speaker between the two terminals.
  Is the resistance of the speaker below 1.0 Ohm?
  
  Yes
  - Replace the Amplified Left Rear Door Speaker in accordance with the Service Information. Refer to REAR DOOR SPEAKER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (X205) AMPLIFIED LEFT REAR DOOR SPEAKER (+) CIRCUIT, AND THE (X295) AMPLIFIED LEFT REAR DOOR SPEAKER (-) CIRCUITS FOR A SHORT TOGETHER
1. Disconnect the Amplifier C1 harness connector.
2. Measure the resistance between the (X205) Amplified Left Rear Door Speaker (+) circuit and the (X295) Amplified Left Rear Door Speaker (-) circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (X205) Amplified Left Rear Door Speaker (+) circuit for a short to the (X295) Amplified Left Rear Door Speaker (-) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Amplifier in accordance with the Service Information. Refer to AMPLIFIER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .