Schematic Reference:
Radio/Audio System Schematics
in Vehicle DTC Information.
Diagnostic System Check - Entertainment System
Always perform the Vehicle Diagnostic System Check before proceeding with these
diagnostic procedures. Refer to
Diagnostic System Check - Vehicle
in Vehicle DTC Information.
Scan Tool Parameter
The scan tool parameter video signal, in the DVD data display list can be useful
in diagnosing this fault. The video signal parameter displays present or not present
based on whether the DVD player senses a signal on the video signal circuit. The scan
tool parameter may be helpful when diagnosing a poor video display when using an auxilliary
device.
Video Display is Blank
Important: The following information lists the most
probable cause of the concern to the least probable cause. If the list leads to the
replacement of a component, always inspect for a poor connection before proceeding
with replacement. Refer to
Testing for Intermittent Conditions and Poor Connections
and
Connector Repairs
in Wiring Systems.
| • | VSM +8v circuit open or high resistance between the DVD player and the
video display--Test the VSM +8v circuit for an open or high resistance. Refer
to
Circuit Testing
and
Wiring Repairs
in Wiring Systems. |
| • | Ground circuit open or high resistance between the DVD player and the
video display--Test the ground circuit for an open or high resistance. Refer
to
Circuit Testing
and
Wiring Repairs
in Wiring Systems. |
| • | Video signal circuit open or high resistance between the DVD player and
the video display--Test the video signal circuit for an open or high resistance.
Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems. |
| • | Bright control circuit short to ground between the DVD player and the
video display--Test the bright control circuit for a shot to ground. Refer to
Circuit Testing
and
Wiring Repairs
in Wiring Systems. |
Video Display is White
| • | Ground circuit shorted to B+ between the DVD player and the video display--Test
the ground circuit for a short to B+ . Refer to
Circuit Testing
and
Wiring Repairs
in
Wiring Systems. |
