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Home >> Jeep >> 2007 >> Liberty Limited, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> (Audio System & Video System - Electrical Diagnostics) >> Audio/Video >> DTC Troubleshooting >> Power Amp Shutdown Premium Audio >> Diagnostic Test

Diagnostic Test

  1. 1) DETERMINE FAULT 

    Turn the ignition on.

    Turn the Radio on.

    With the Scan Tool, erase the audio DTC's.

    Cycle the ignition switch from off to on and wait 10 seconds.

    With the Scan Tool, read the audio DTC's.

    Does the Scan Tool display POWER AMP SHUTDOWN? 

    Yes 

    1. Go to step  2).

    No 

    1. Refer to SYSTEM WIRING DIAGRAMS article to help isolate a possible intermittent short.
    2. Perform BODY VERIFICATION TEST .
  2. 2) LEFT FRONT DOOR SPEAKER 
    Fig 1: Left Front Door Speaker Harness Connector
    GC0046787Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Left Front Door Speaker harness connector.

    Turn the ignition on.

    Turn the radio on.

    With the Scan Tool, erase the audio DTCs.

    Cycle the ignition switch from off to on and wait 10 seconds.

    With the Scan Tool, read DTC's.

    Does the Scan Tool display POWER AMP SHUTDOWN? 

    Yes 

    1. Go to step  3).

    No 

    1. Replace the Left Front Door Speaker.
    2. Perform BODY VERIFICATION TEST .
  3. 3) RIGHT FRONT DOOR SPEAKER 
    Fig 2: Right Front Door Speaker Harness Connector
    GC0046789Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Right Front Door Speaker harness connector.

    Turn the ignition on.

    Turn the radio on.

    With the Scan Tool, erase the audio DTCs.

    Cycle the ignition switch from off to on and wait 10 seconds.

    With the Scan Tool, read DTC's.

    Does the Scan Tool display POWER AMP SHUTDOWN? 

    Yes 

    1. Go to step  4).

    No 

    1. Replace the Right Front Door Speaker.
    2. Perform BODY VERIFICATION TEST .
  4. 4) (+) CIRCUIT SHORTED TO GROUND 

    Turn the ignition off.

    Disconnect the Left Front Door Speaker harness connector.

    Disconnect the Right Front Door Speaker harness connector.

    Disconnect the Radio C1 harness connector.

    Measure the resistance between ground and each speaker (+) circuit.

    Is the resistance below 1000.0 (1K) ohms? 

    Yes 

    1. Repair the speaker (+) circuit for a short to ground.
    2. Perform BODY VERIFICATION TEST .

    No 

    1. Go to step  5).
  5. 5) (-) CIRCUIT SHORTED TO GROUND 

    Turn the ignition off.

    Disconnect the Left Front Door Speaker harness connector.

    Disconnect the Right Front Door Speaker harness connector.

    Disconnect the Radio C1 harness connector.

    Measure the resistance between ground and each speaker (-) circuit.

    Is the resistance below 1000.0 (1K) ohms? 

    Yes 

    1. Repair the speaker (-) circuit for a short to ground.
    2. Perform BODY VERIFICATION TEST .

    No 

    1. Go to step  6).
  6. 6) SPEAKER (+) & (-) CIRCUITS SHORTED TOGETHER 

    Turn the ignition off.

    Disconnect the Left Front Door Speaker harness connector.

    Disconnect the Right Front Door Speaker harness connector.

    Disconnect the Radio C1 harness connector.

    Measure the resistance between each speaker (+) circuit and each speaker (-) circuit.

    Is the resistance below 1000.0 (1K) ohms for any of the measurements? 

    Yes 

    1. Repair the shorted together speaker circuits.
    2. Perform BODY VERIFICATION TEST .

    No 

    1. Go to step  7).
  7. 7) SPEAKER SECTION OF RADIO 

    If there are no possible causes remaining, view repair. 

    Repair 

    1. Replace the Radio.
    2. Perform BODY VERIFICATION TEST .