Diagnostic System Check - Entertainment
Always perform the Diagnostic System Check - Entertainment before proceeding
with these diagnostic procedures. Refer to
Diagnostic System Check - Entertainment System
in Entertainment.
Video Display is Poor or Blank
Important: The following information lists the most probable cause of the concern to the
least probable cause, followed by the appropriate test for the condition. If the list
leads to the replacement of a component, always inspect for a poor connection before
proceeding with the replacement. Refer to
Testing for Intermittent Conditions and Poor Connections
and
Connector Repairs
in Wiring Systems.
Schematic Reference:
Video System Schematics
| • | Video postive circuit open, shorted to battery positive, or shorted to
ground |
| | Test the Video (+) circuit for an open, short to battery positive, or a short
to ground. Refer to
Circuit Testing
and
Wiring Repairs
in
Wiring Systems. |
| • | Video (-) circuit open or shorted to battery positive. |
| • | Auxiliary Control circuit open or shorted to ground. |
| • | DVD Head to Display Serial Data circuit shorted to ground |
| | At the overhead display connector, check for varying DC voltage on the DVD Head
to Display Serial Data circuit. If no varying DC voltage is found, check for a short
to ground. Refer to
Circuit Testing
and
Wiring Repairs
in
Wiring Systems. If no short to ground is found, replace the radio. Refer to
Radio Replacement
in Entertainment. |
| • | Display to DVD Head Serial Data circuit open. |
