Jeep Liberty KJ. Manual — part 1430
POWER AMP SHUTDOWN - PREMIUM AUDIO SYSTEM
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
Ignition in RUN and IOD fuse installed.
•
Set Condition:
The radio has sensed a short on the output for more than 10 seconds.
Possible Causes
LEFT FRONT DOOR SPEAKER
RIGHT FRONT DOOR SPEAKER
(+) CIRCUIT SHORTED TO GROUND
(-) CIRCUIT SHORTED TO GROUND
(+) & (-) CIRCUITS SHORTED TOGETHER
RADIO
Diagnostic Test
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
>> Go To 2
No
>> Refer to the wiring diagrams located in the service information to help isolate a possible intermittent
short.
Perform BODY VERIFICATION TEST - VER 1.
2.
LEFT FRONT DOOR SPEAKER
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
>> Go To 3
No
>> Replace the Left Front Door Speaker.
Perform BODY VERIFICATION TEST - VER 1.
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AUDIO/VIDEO - ELECTRICAL DIAGNOSTICS
KJ
3.
RIGHT FRONT DOOR SPEAKER
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
>> Go To 4
No
>> Replace the Right Front Door Speaker.
Perform BODY VERIFICATION TEST - VER 1.
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
>> Repair the speaker (+) circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 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
>> Repair the speaker (-) circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 6
KJ
AUDIO/VIDEO - ELECTRICAL DIAGNOSTICS
8A - 25
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
>> Repair the shorted together speaker circuits.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 7
7.
SPEAKER SECTION OF RADIO
If there are no possible causes remaining, view repair.
Repair
Replace the Radio.
Perform BODY VERIFICATION TEST - VER 1.
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*REMOTE RADIO SWITCHES INOPERATIVE (IF EQUIPPED)
For a complete wiring diagram Refer to Section 8W
Possible Causes
ATTEMPT TO COMMUNICATE WITH THE RADIO
CHECK OPERATION OF SWITCHES
LEFT REMOTE RADIO SWITCH SHORTED TO GROUND
RIGHT REMOTE RADIO SWITCH SHORTED TO GROUND
RADIO CONTROL MUX CIRCUIT SHORTED TO GROUND AT THE SWITCH
RADIO CONTROL MUX CKT SHORTED TO THE RADIO CONTROL MUX RETURN CKT AT THE SWITCH
CLOCKSPRING SHORTED TO GROUND
RADIO CONTROL MUX CIRCUIT SHORTED TO GROUND
RADIO CONTROL MUX CKT SHORTED TO THE RADIO CONTROL MUX RETURN CKT
BODY CONTROL MODULE - INTERNAL SHORT
CLOCKSPRING OPEN
OPEN RADIO CONTROL MUX RETURN CIRCUIT
OPEN RADIO CONTROL MUX CIRCUIT
BODY CONTROL MODULE - OPEN INTERNALLY
Diagnostic Test
1.
ATTEMPT TO COMMUNICATE WITH THE RADIO
Turn the ignition on.
With the Scan Tool, attempt to communicate with the Radio.
Was the Scan Tool able to communicate with the Radio?
Yes
>> Go To 2
No
>> Refer to the communication category and perform the appropriate symptom.
Perform BODY VERIFICATION TEST - VER 1.
2.
CHECK OPERATION OF SWITCHES
Turn the ignition on.
Turn the Radio on.
Operate all the remote radio switch functions.
Is only one function or one switch not operating properly?
Yes
>> Repair the Radio Control MUX circuit or the Radio Control MUX Return circuit for an open between the
inoperative switch and the clockspring. If OK, replace the remote radio switch.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 3
KJ
AUDIO/VIDEO - ELECTRICAL DIAGNOSTICS
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