Diagnosis And Testing - Remote Radio Switches

WARNING:

On vehicles equipped with airbags, refer to electrical, restraints before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Failure to take the proper precautions could result in accidental airbag deployment and possible personal injury.

Any diagnosis of the Audio system should begin with duplicating the customer concern (verify the problem), including checking for applicable Technical Service Bulletins (TSB), Star Online Publications, and the use of a diagnostic scan tool. Check for any Diagnostic Trouble Code (DTC) data. If a DTC is found, refer to DTC INDEX (1 OF 2) and/or DTC INDEX (2 OF 2) and perform the appropriate diagnostic procedure before proceeding in this service information. Refer to the appropriate wiring information.

Remove the remote radio switch(es) from the steering wheel. Refer to SWITCH, REMOTE RADIO, REMOVAL AND INSTALLATION .

Courtesy of CHRYSLER GROUP, LLC
Use an ohmmeter to check the switch resistances at the switch connector while pressing each button. The resistance values must match those shown in the Remote Radio Switch Test chart.

If the switch resistance checks OK, go to Step 4 . If not OK, replace the faulty switch.

REMOTE RADIO SWITCH TEST
Switch	Switch Position	Minimum Resistance (kilohms)	Nominal Resistance (kilohms)	Maximum Resistance (kilohms)
Right	Volume Up	4.788	5.32	5.852
Right	Volume Down	8.343	9.27	10.197
Right	Mode Advance	0	0	0.05
Left	Seek Up	1.089	1.21	1.331
Left	Seek Down	2.988	3.32	3.652
Left	Pre-Set Station Advance	0.427	0.475	0.522

Check for continuity between the ground circuit cavity of the steering wheel wire harness connectors for the switches and a known good ground. There should be continuity. If OK, go to Step 5 . If not OK, repair the open ground circuit as required.
Disconnect the appropriate wire harness connector from the Body Control Module (BCM). Check for continuity between the radio control circuit cavity of the steering wire harness connectors for the switches and ground. There should be no continuity. If OK, go to Step 6 . If not OK, repair the shorted radio control circuit as required.
Check for continuity between the radio control circuit cavities of the steering wheel wire harness connectors for the switches and the BCM wire harness connector. There should be continuity. If OK, use a diagnostic scan tool and the appropriate diagnostic procedures to test the BCM, the radio and the Controller Area Network (CAN) data bus. If not OK, repair the open radio control circuit as required.