Circuit/System Testing

DVD Vehicle Audio Playback Inoperative

1. Turn ON the ignition, Tune the radio to station 88.5, 88.7, 88.9, 89.1,89.3, 89.5, 89.7, or 89.9, MHz. Chose the station that has the least amount of regular audible radio reception or noise.
2. Turn ON the FM frequency selector switch and select the same frequency that the radio is tuned to.
3. Press the power button on the headrest DVD display(s). Insert a DVD and operate the DVD player in play mode. Verify the DVD audio can not received on one of the above stations.
   • If the DVD audio can be heard review the system operation with the customer.
4. Verify the DVD player is in play mode and the proper source is selected at the DVD display screens.
5. At the DVD player, test for AC voltage on all the audio left and right circuits with a DMM.
   • If AC voltage is not present, test the appropriate circuit for an open / high resistance, or short to ground or short to power.
   • If the circuits test normal, replace the DVD control module.
6. Test for AC voltage on the audio left and right circuits to audio ground, between the A/V box and the audio filter.
   • If AC voltage is not present, test the appropriate circuit for an open / high resistance, or short to ground or short to power.
   • If the circuits test normal, replace the audio filter.
7. Test for AC voltage on the audio left and right circuits to audio ground, between the audio filter and the FM modulator.
   • If AC voltage is not present, test the appropriate circuit for an open / high resistance, or short to ground or short to power.
   • If the circuits test normal, replace the FM Modulator.