GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Video System Schematics

Connector End View Reference: Entertainment Connector End Views

DEFINITION: This procedure diagnoses the cause of poor video quality in the rear disc player and video display whether viewing a DVD or television viewing (if equipped).

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

Is the vehicle equipped with U2X or U2Y (TV)?

Go to Step 3

Go to Step 10

3

Test the operation of the entertainment system by viewing television in the navigation radio.

Is the video quality poor in the navigation radio?

Go to Navigation System - Poor or Inoperative TV Reception in Navigation Systems

Go to Step 4

4

Test the operation of the entertainment system by viewing television in the disc player and video display.

Is the television video quality poor in the disc player and video display ?

Go to Step 5

Go to Step 7

5

Test the TV video (+) circuit for the following conditions:

    •  Open
    •  Short to ground

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 6

6

Test the TV video ground circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 7

7

Play a DVD in the navigation radio and view it in the rear disc player and video display.

Is the video quality poor in the disc player and video display?

Go to Step 8

Go to Step 10

8

Test the avn video (+) circuit for the following conditions:

    • Open
    • Short to ground

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 9

9

Test the TV video ground circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 10

10

Test the operation of rear disc player and video display.

Is the video quality normal?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 11

11

Inspect for poor connections at the following connectors:

    •  The disc player and video display
    •  The TV tuner (if equipped)

Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 12

12

Replace the disc player and video display. Refer to Video with DVD Display Replacement .

Did you complete the replacement?

Go to Step 13

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13

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

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