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 harness connector.
3. Turn the ignition on.
4. Turn the Radio on and turn the volume to 25.
5. Adjust the speakers to the rear and center.
6. With a voltmeter set to read in A/C voltage, measure the voltage of the Center I/P Speaker circuits in the Center I/P Speaker harness connector.
  Is the voltage present above 1.0 volt?
  
  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 FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the Amplifier C1 harness connector.
3. Measure the resistance of the (X200) Center I/P Speaker (+) circuit between the Amplifier C1 harness connector and the Center I/P Speaker harness connector.
  Is the resistance below 2.5 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (X200) Center I/P Speaker (+) circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (X290) CENTER I/P PANEL SPEAKER (-) CIRCUIT FOR AN OPEN
1. Measure the resistance of the (X290) Center I/P Speaker (-) circuit between the Amplifier C1 harness connector and the Center I/P Speaker harness connector.
  Is the resistance below 2.5 Ohms?
  
  Yes
  - Replace the Amplifier in accordance with the Service Information. Refer to AMPLIFIER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the (X290) Center I/P Speaker (-) circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .