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 - *REMOTE RADIO SWITCHES INOPERATIVE (IF EQUIPPED)

TEST	ACTION	APPLICABILITY
1	Turn the ignition on. With the DRB, attempt to communicate with the Radio. Was the DRB able to communicate with the Radio? Yes --> Go To 2 No --> Refer to COMMUNICATION CATEGORY and perform the appropriate symptom. Perform BODY VERIFICATION TEST - VER 1 .	All
2	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	All
3	Turn the ignition on. With the DRB, enter Body Computer then Sensors and monitor the Radio Control SW voltage. Is the voltage above 3.8 volts? Yes --> Go To 4 No --> Go To 8	All
4	Turn the ignition on. Turn the Radio on. Disconnect the Clockspring C1 harness connector. Connect a jumper wire between the Radio Control MUX circuit and the Radio Control MUX Return circuit. Did the radio change stations? Yes --> Repair the Radio Control MUX circuit or the Radio Control MUX Return circuit for an open between the clockspring and the splice to the switches. If OK, replace the Clockspring. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 5	All
5	Turn the ignition off. Disconnect the Clockspring C1 harness connector. Disconnect the BCM C2 harness connector. Measure the resistance of the Radio Control MUX Return circuit between the BCM C2 connector and the Clockspring C1 connector. Is the resistance below 5.0 ohms? Yes --> Go To 6 No --> Repair the Radio Control MUX Return circuit for an open between the clockspring and the BCM. Perform BODY VERIFICATION TEST - VER 1 .	All
6	Turn the ignition off. Disconnect the Clockspring C1 harness connector. Disconnect the BCM C2 harness connector. Measure the resistance of the Radio Control MUX circuit between the BCM C2 connector and the Clockspring C1 connector. Is the resistance below 5.0 ohms? Yes --> Go To 7 No --> Repair the Radio Control MUX circuit for an open between the clockspring and the BCM. Perform BODY VERIFICATION TEST - VER 1 .	All
7	If there are no possible causes remaining, view repair. Repair Replace the Body Control Module in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 .	All
8	WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait 2 minutes before proceeding. CAUTION: Do not place an intact undeployed airbag module face down on a hard surface, the airbag module will propel into the air if accidently deployed. Remove the Driver Airbag Module.Disconnect the Left Remote Radio Switch harness connector.Turn the ignition on, reconnect the battery.With the DRB, enter Body Computer then Sensors and monitor the Radio Control SW voltage.Is the voltage above 3.8 volts?Yes --> Replace the Left Remote Radio Switch.Perform BODY VERIFICATION TEST - VER 1 .No --> Go To 9	All
9	WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait 2 minutes before proceeding. CAUTION: Do not place an intact undeployed airbag module face down on a hard surface, the airbag module will propel into the air if accidently deployed. Remove the Driver Airbag Module.Disconnect the Right Remote Radio Switch harness connector.Turn the ignition on, reconnect the battery.With the DRB, enter Body Computer then Sensors and monitor the Radio Control SW voltage.Is the voltage above 3.8 volts?Yes --> Replace the Right Remote Radio Switch.Perform BODY VERIFICATION TEST - VER 1 .No --> Go To 10	All
10	Turn the ignition off. Disconnect the Clockspring C3 harness connector. Turn the ignition on. With the DRB, enter Body Computer then Sensors and monitor the Radio Control SW voltage. Is the voltage above 3.8 volts? Yes --> Go To 11 No --> Go To 12	All
11	Turn the ignition off. Disconnect the Clockspring C3 harness connector. NOTE: Ensure both remote radio switches are disconnected. Measure the resistance between ground and the Radio Control MUX circuit at the clockspring C3 harness connector. Is the resistance below 5.0 ohms? Yes --> Repair the Radio Control MUX circuit for a short to ground between the clockspring and the remote radio switches. Perform BODY VERIFICATION TEST - VER 1 . No --> Repair the Radio Control MUX circuit for a short to the Radio Control MUX Return circuit between the clockspring and the remote radio switches. Perform BODY VERIFICATION TEST - VER 1 .	All
12	Turn the ignition off. Disconnect the Clockspring C1 harness connector. Turn the ignition on. With the DRB, enter Body Computer then Sensors and monitor the Radio Control SW voltage. Is the voltage above 3.8 volts? Yes --> Replace the Clockspring in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 13	All
13	Turn the ignition off. Disconnect the Clockspring C1 harness connector. Disconnect the BCM C2 harness connector. Measure the resistance between ground and the Radio Control MUX circuit. Is the resistance below 5.0 ohms? Yes --> Repair the Radio Control MUX circuit for a short to ground between the clockspring and the BCM. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 14	All
14	Turn the ignition off. Disconnect the Clockspring C1 harness connector. Disconnect the BCM C2 harness connector. Measure the resistance between the Radio Control MUX circuit and the Radio Control MUX Return circuit. Is the resistance below 5.0 ohms? Yes --> Repair the Radio Control MUX circuit for a short to the Radio Control MUX Return circuit between the clockspring and the BCM. Perform BODY VERIFICATION TEST - VER 1 . No --> Replace the Body Control Module in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1 .	All