Jeep Liberty KJ. Manual — part 1428
CD TEMPERATURE HIGH
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
Continuously with the ignition and the radio CD player turned on.
•
Set Condition:
The code will set if the temperature inside the radio CD player is above +70° C (+156° F).
Possible Causes
HIGH TEMPERATURE FAILURE
Diagnostic Test
1.
HIGH TEMPERATURE
With the ScanTool, erase the audio DTC’s.
Start the engine and allow the engine to reach normal operating temperature.
If the vehicle has been in the hot sunlight or extreme cold move the vehicle indoors and open the doors to allow the
inside temperature to stabilize.
The radio CD player will operate between -23° C and 70° C (-10° F and +156° F).
With the Scan Tool, read DTC’s.
Does the Scan Tool display CD TEMPERATURE HIGH?
Yes
>> Replace the Radio.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Test Complete.
8A - 16
AUDIO/VIDEO - ELECTRICAL DIAGNOSTICS
KJ
LOW VOLTAGE LEVEL
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
With the radio on.
•
Set Condition:
The radio detects lower than normal voltage.
Possible Causes
CHECK CHARGING SYSTEM
CHECK VOLTAGE LEVEL AT RADIO
RADIO
Diagnostic Test
1.
CHECK CHARGING SYSTEM
Check the charging system in accordance with the service information.
Is the charging system operating properly?
Yes
>> Go To 2
No
>> Refer to the appropriate service information and repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
2.
CHECK VOLTAGE LEVEL AT RADIO
Turn the ignition off.
Disconnect the Radio harness connector.
Start the engine.
Measure the voltage of each Fused B+ circuit and the Fused Ignition Switch Output circuit.
Is the voltage above or approximately 14 volts for each measurement?
Yes
>> Go To 3
No
>> Repair the circuit for high resistance.
Perform BODY VERIFICATION TEST - VER 1.
3.
RADIO
NOTE: Reconnect all previously disconnected components.
Turn the ignition and Radio on.
With the Scan Tool, erase the audio DTC’s.
Start the engine.
With the Scan Tool, read the audio DTC’s.
Did this DTC reset?
Yes
>> Replace the Radio.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Test Complete.
KJ
AUDIO/VIDEO - ELECTRICAL DIAGNOSTICS
8A - 17
NO ANTENNA CONNECTION
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
With the ignition on and the radio in seek up/down mode.
•
Set Condition:
With the radio in seek mode for two minutes and the radio does not detect an antenna connection or does not
receive a radio station signal.
Possible Causes
BAD ANTENNA CONNECTION
TEST ANTENNA
RADIO
Diagnostic Test
1.
BAD ANTENNA CONNECTION
Turn the ignition off.
Disconnect the Radio Antenna connector.
Inspect the Radio Antenna connection.
Was the Antenna connection clean and tight?
Yes
>> Go To 2
No
>> Repair Antenna connection as needed.
Perform BODY VERIFICATION TEST - VER 1.
2.
TEST ANTENNA
Refer to the Audio System in the service information and test the Antenna in accordance with the service procedure.
Is the Antenna ok?
Yes
>> Go To 3
No
>> Repair or replace the Antenna assembly as necessary.
Perform BODY VERIFICATION TEST - VER 1.
3.
RADIO
NOTE: Reconnect all previously disconnected components.
Turn the ignition and Radio on.
NOTE: Move vehicle outside approximately 30ft from any structure.
With the Scan Tool, erase the audio DTC’s, put the radio in seek up and seek down mode for approximately 2
minutes before proceeding.
With the Scan Tool, read the audio DTC’s.
Did this DTC reset?
Yes
>> Replace the Radio.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Test Complete.
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AUDIO/VIDEO - ELECTRICAL DIAGNOSTICS
KJ
*POOR SOUND QUALITY
For a complete wiring diagram Refer to Section 8W
Possible Causes
CHECK AUDIO DTCS
CHECK SELECTED RADIO EQ CURVE
SET THE RADIO EQ CURVE
VERIFY SOUND PERFORMANCE
Diagnostic Test
1.
CHECK AUDIO DTCS
Turn the ignition on.
With the Scan Tool, check for any audio related DTC’s.
Are any Audio related DTCs set?
Yes
>> Refer to the Audio category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 2
2.
CHECK SELECTED RADIO EQ CURVE
Turn the ignition on.
With the Scan Tool, enter body, body computer then miscellaneous.
Check the radio EQ curve setting and follow the instructions on the Scan Tool.
Is the radio EQ curve correct for the audio combination the vehicle is equipped with?
Yes
>> Refer to the service information for problems related to poor sound quality and perform the appropriate
checks.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 3
3.
SET THE RADIO EQ CURVE
Turn the ignition on.
With the Scan Tool, enter body, body computer then miscellaneous.
Set the radio EQ curve. Follow the instructions on the Scan Tool.
Cycle the ignition switch from off to on.
Check the radio EQ curve setting.
Is the radio EQ curve correct for the audio combination the vehicle is equipped with?
Yes
>> Refer to the service information for problems related to poor sound quality and perform the appropriate
checks.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Body Control Module in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
KJ
AUDIO/VIDEO - ELECTRICAL DIAGNOSTICS
8A - 19
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