Jeep Wrangler TJ. Manual — part 22
Symptom:
CD TEMPERATURE HIGH
When Monitored and Set Condition:
CD TEMPERATURE HIGH
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
+85° C (+185° F).
POSSIBLE CAUSES
HIGH TEMPERATURE FAILURE
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, 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 -30° C and 85° C (-22° F and +185° F).
With the DRBIII
t, read DTC’s.
Does the DRBIII
t display CD TEMPERATURE HIGH?
All
Yes
→ Replace the Radio.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
85
AUDIO
Symptom:
LOW VOLTAGE LEVEL
When Monitored and Set Condition:
LOW VOLTAGE LEVEL
When Monitored:
Set Condition:
The radio detects lower than normal voltage.
POSSIBLE CAUSES
CHECK CHARGING SYSTEM
CHECK VOLTAGE LEVEL AT RADIO
RADIO
TEST
ACTION
APPLICABILITY
1
Check the charging system in accordance with the service information.
Is the charging system operating properly?
All
Yes
→ Go To 2
No
→ Refer to the appropriate service information and repair as neces-
sary.
Perform BODY VERIFICATION TEST - VER 1.
2
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?
All
Yes
→ Go To 3
No
→ Repair the circuit for high resistance.
Perform BODY VERIFICATION TEST - VER 1.
3
Note: Reconnect all previously disconnected components.
Turn the ignition and Radio on.
With the DRBIII
t, erase the audio DTC’s.
Start the engine.
With the DRBIII
t, read the audio DTC’s.
Did this DTC reset?
All
Yes
→ Replace the Radio.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
86
AUDIO
Symptom:
NO ANTENNA CONNECTION
When Monitored and Set Condition:
NO ANTENNA CONNECTION
When Monitored:
With the ignition on and the radio in seek up/down mode.
Set Condition:
With the radio in seek or scan 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
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the Radio Antenna connector.
Inspect the Radio Antenna connection.
Was the Antenna connection clean and tight?
All
Yes
→ Go To 2
No
→ Repair Antenna connection as needed.
Perform BODY VERIFICATION TEST - VER 1.
2
Refer to the Audio System in the service information and test the Antenna in
accordance with the service procedure.
Is the Antenna ok?
All
Yes
→ Go To 3
No
→ Repair or replace the Antenna assembly as necessary.
Perform BODY VERIFICATION TEST - VER 1.
3
NOTE: Reconnect all previously disconnected components.
Turn the ignition and Radio on.
NOTE: Move vehicle outside approximately 30ft from any structure.
With the DRBIII
t, erase the audio DTC’s, put the radio in seek up and seek down
mode for approximately 2 minutes before proceeding.
With the DRBIII
t, read the audio DTC’s.
Did this DTC reset?
All
Yes
→ Replace the Radio.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
87
AUDIO
Symptom:
POWER AMP SHUTDOWN - BASE AUDIO SYSTEM
When Monitored and Set Condition:
POWER AMP SHUTDOWN - BASE AUDIO SYSTEM
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
DETERMINE FAULT
FRONT SHORTED SPEAKER
REAR SHORTED SPEAKER
(+) CIRCUIT SHORTED TO GROUND
(-) CIRCUIT SHORTED TO GROUND
SPEAKER (+) & (-) CIRCUITS SHORTED TOGETHER
SPEAKER SECTION OF RADIO
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
Turn the Radio on.
With the DRBIII
t, erase the audio DTC’s.
Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII
t, read the audio DTC’s.
Does the DRBIII
t display POWER AMP SHUTDOWN?
All
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
Turn the ignition off.
NOTE: Perform this procedure after disconnecting each front speaker
connector.
Disconnect each front speaker harness connector one at a time.
Turn the ignition on.
Turn the radio on.
With the DRBIII
t, erase the audio DTCs.
Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII
t, read DTC’s.
Does the DRBIII
t display POWER AMP SHUTDOWN with all the front speakers
disconnected?
All
Yes
→ Go To 3
No
→ Replace the Speaker that when disconnected the DTC did not
reset.
Perform BODY VERIFICATION TEST - VER 1.
88
AUDIO
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