Jeep Grand Cherokee WK. Manual — part 228
B2222-SATELLITE RADIO RECEIVER INTERNAL
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The Satellite Radio Receiver detects a software checksum test failure.
Possible Causes
SATELLITE RADIO RECEIVER
Diagnostic Test
1.
REPLACE THE SATELLITE RADIO RECEIVER
When this code is set, the Satellite Radio must be replaced.
Repair
Replace the Satellite Radio Receiver in accordance with the Service Information.
Perform the BODY VERIFICATION TEST-VER 1.
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AUDIO/VIDEO SYSTEMS - ELECTRICAL DIAGNOSIS
WK
B1428-REMOTE RADIO SWITCH INPUT CIRCUIT STUCK
WK
AUDIO/VIDEO SYSTEMS - ELECTRICAL DIAGNOSIS
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B1428-REMOTE RADIO SWITCH INPUT CIRCUIT STUCK (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition in any position except off.
•
Set Condition:
The Instrument Cluster detects a stuck switch state on the (X20) Radio Control MUX circuit for more than
30 seconds.
Possible Causes
(X20) REMOTE CONTROL MUX CIRCUIT SHORT TO GROUND
(X20) REMOTE CONTROL MUX CIRCUIT SHORT TO (G902) SWITCH MUX RETURN CIRCUIT
LEFT REMOTE RADIO SWITCH
RIGHT REMOTE RADIO SWITCH
CLOCKSPRING
INSTRUMENT CLUSTER (CCN)
Diagnostic Test
1.
CHECK FOR ACTIVE DTC
With the scan tool, read the active DTC’s.
Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per
cycle.
With the scan tool, read the active DTC’s.
Does the scan tool display this DTC as active?
Yes
>> Go To 2
No
>> If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness con-
nectors. Look for broken, bent, pushed out, or corroded terminals.
2.
LEFT REMOTE RADIO SWITCH
Turn the ignition off.
Disconnect the Left Remote Radio Switch harness connector.
Turn the ignition on.
With the scan tool monitor the Remote Radio Control Switch voltage.
Is the voltage approximately 5.0 volts?
Yes
>> Replace the Left Remote Radio Switch in accordance with
the service information.
Perform BODY VERIFICATION TEST – VER 1.
No
>> Go To 3
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B1428-REMOTE RADIO SWITCH INPUT CIRCUIT STUCK (CONTINUED)
3.
RIGHT REMOTE RADIO SWITCH
Turn the ignition off.
Disconnect the Right Remote Radio Switch harness connector.
Turn the ignition on.
With the scan tool monitor the Remote Radio Control Switch voltage.
Is the voltage approximately 5.0 volts?
Yes
>> Replace the Right Remote Radio Switch in accordance
with the service information.
Perform BODY VERIFICATION TEST – VER 1.
No
>> Go To 4
4.
CLOCKSPRING
Turn the ignition off.
Disconnect the Clockspring C1 harness connector.
Turn the ignition on.
With the scan tool monitor the Remote Radio Control Switch voltage.
Is the voltage approximately 5.0 volts?
Yes
>> Check the (X20) Radio Control MUX circuit for a short
between the clockspring and the remote radio switches. If
ok, replace the Clockspring in accordance with the service
information.
Perform BODY VERIFICATION TEST – VER 1.
No
>> Go To 5
WK
AUDIO/VIDEO SYSTEMS - ELECTRICAL DIAGNOSIS
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