Schematic Reference: Navigation System Schematics

DEFINITION: When playing a video input source connected to the auxiliary RCA video jacks, the video audio is inoperative, plays one side only or is degraded.

Did you perform Diagnostic System Check - Navigation System ?

Go to Step 2

Go to Diagnostic System Check - Navigation System

1. Turn ON the ignition. The Cadillac emblem screen appears on the navigation display head (NDH).
2. Leave the vehicle in PARK.
3. Press the audio MENU button on the NDH. The audio menu appears on the display.
4. Press the TV button on the NDH audio menu screen. (This button is present with UE7 only.)
5. Select a TV station. The TV should be clear on the NDH display.
6. Connect a VCR to the auxiliary RCA video jacks.
7. Select AUX VIDEO under the TV SELECTIONS menu options.
8. Observe the display. The VCR selection should appear on the NDH. The picture and audio should be clear.

Does the system operate normally?

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

Go to Step 3

Operate the TV function of the navigation system.

Does the audio for the TV function operate with good quality?

Go to Step 5

Go to Step 4

Test the following circuits between the navigation display head (NDH) and the radio for an open, a short to ground or a short to voltage:

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 10

Test the following circuits for an open, a short to ground or a short to voltage.

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 6

Test for a short from the auxiliary audio left signal circuit to the auxiliary audio right signal circuit. 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 11

Go to Step 7

Inspect for poor connections at the harness connector of the auxiliary RCA video jacks. 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 11

Go to Step 8

Replace the auxiliary RCA video jacks. Refer to Audio/Video Wiring Harness Replacement .

Did you find and correct the condition?

Go to Step 11

Go to Step 9

Inspect for poor connections at the harness connector of the navigation display head (NDH). 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 11

Go to Step 10

Replace the navigation display head (NDH). Refer to Navigation Display Module Replacement .

Did you complete the replacement?

Go to Step 11

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3