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Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE - POWER AMP SHUTDOWN - BASE AUDIO SYSTEM

TEST ACTION APPLICABILITY
1 Turn the ignition on.
Turn the Radio on.
With the DRBIII®, erase the audio DTC's.
Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII®, read the audio DTC's.
Does the DRBIII® display POWER AMP SHUTDOWN?
Yes --> Go To 2
No --> Refer to SYSTEM WIRING DIAGRAMS to help isolate a possible intermittent short.
Perform BODY VERIFICATION TEST - VER 1  .		 All
2 Turn the ignition off.
Disconnect the Left I/P Speaker harness connector.
Turn the ignition on.
Turn the radio on.
With the DRBIII®, erase the audio DTCs.
Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII®, read DTC's.
Does the DRBIII® display POWER AMP SHUTDOWN?
Yes --> Go To 3
No --> Replace the Left I/P Speaker.
Perform BODY VERIFICATION TEST - VER 1  .		 All
3 Turn the ignition off.
Disconnect the Left Front Door Speaker harness connector.
Turn the ignition on.
Turn the radio on.
With the DRBIII®, erase the audio DTCs.
Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII®, read DTC's.
Does the DRBIII® display POWER AMP SHUTDOWN?
Yes --> Go To 4
No --> Replace the Left Front Door Speaker.
Perform BODY VERIFICATION TEST - VER 1  .		 All
4 Turn the ignition off.
Disconnect the Right I/P Speaker harness connector.
Turn the ignition on.
Turn the radio on.
With the DRBIII®, erase the audio DTCs.
Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII®, read DTC's.
Does the DRBIII® display POWER AMP SHUTDOWN?
Yes --> Go To 5
No --> Replace the Right I/P Speaker.
Perform BODY VERIFICATION TEST - VER 1  .		 All
5 Turn the ignition off.
Disconnect the Right Front Door Speaker harness connector.
Turn the ignition on.
Turn the radio on.
With the DRBIII®, erase the audio DTCs.
Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII®, read DTC's.
Does the DRBIII® display POWER AMP SHUTDOWN?
Yes --> Go To 6
No --> Replace the Right Front Door Speaker.
Perform BODY VERIFICATION TEST - VER 1  .		 All
6 Turn the ignition off.
Disconnect the Left Rear Speaker harness connector.
Turn the ignition on.
Turn the radio on.
With the DRBIII®, erase the audio DTCs.
Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII®, read DTC's.
Does the DRBIII® display POWER AMP SHUTDOWN?
Yes --> Go To 7
No --> Replace the Left Rear Speaker.
Perform BODY VERIFICATION TEST - VER 1  .		 All
7 Turn the ignition off.
Disconnect the Right Rear Speaker harness connector.
Turn the ignition on.
Turn the radio on.
With the DRBIII®, erase the audio DTCs.
Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII®, read DTC's.
Does the DRBIII® display POWER AMP SHUTDOWN?
Yes --> Go To 8
No --> Replace the Right Rear Speaker.
Perform BODY VERIFICATION TEST - VER 1  .		 All
8 Turn the ignition off.
Disconnect the Left Front Door Speaker harness connector.
Disconnect the Left I/P Speaker harness connector.
Disconnect the Right Front Door Speaker harness connector.
Disconnect the Right I/P Speaker harness connector.
Disconnect the Left Rear Speaker harness connector.
Disconnect the Right Rear 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 --> Repair the speaker (+) circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 9		 All
9 Turn the ignition off.
Disconnect the Left Front Door Speaker harness connector.
Disconnect the Left I/P Speaker harness connector.
Disconnect the Right Front Door Speaker harness connector.
Disconnect the Right I/P Speaker harness connector.
Disconnect the Left Rear Speaker harness connector.
Disconnect the Right Rear 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 --> Repair the speaker (-) circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 10		 All
10 Turn the ignition off.
Disconnect the Left Front Door Speaker harness connector.
Disconnect the Left I/P Speaker harness connector.
Disconnect the Right Front Door Speaker harness connector.
Disconnect the Right I/P Speaker harness connector.
Disconnect the Left Rear Speaker harness connector.
Disconnect the Right Rear 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 --> Repair the shorted together speaker circuits.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 11		 All
11 If there are no possible causes remaining, view repair.
Repair
Replace the Radio.
Perform BODY VERIFICATION TEST - VER 1  .		 All
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