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. With 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 rear and center.
6. With 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 CENTER I/P PANEL SPEAKER
1. Turn the ignition off.
2. Disconnect the Center I/P Speaker.
3. Measure the resistance of the speaker between the two terminals.
  Is the resistance of the speaker below 1.0 Ohm?
  
  Yes
  - Replace the Center I/P Speaker in accordance with the Service Information. Refer to SPEAKER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (X200) CENTER I/P PANEL SPEAKER (+) CIRCUIT, AND THE (X290) CENTER I/P PANEL SPEAKER (-) CIRCUITS FOR A SHORT TOGETHER
1. Turn the ignition off.
2. Disconnect the Amplifier C1 harness connector.
3. Measure the resistance between the (X200) Center I/P Speaker (+) circuit, and the (X290) Center I/P Speaker (-) circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (X200) Center I/P Speaker (+) circuit, and the (X290) Center I/P Speaker (-) circuit for a short together.
  - 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 .