GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Night Vision Schematics

1

Did you review the Night Vision Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Instrument Panel, Gages and Console

2

  1. Position the vehicle approximately 8 meters (25 feet) from the nearest object.
  2. Cover the lower windshield with a mat.
  3. Cover the ambient light sensor.
  4. Turn the ignition ON, with the engine OFF.
  5. Turn the headlamps ON.
  6. Turn the head-up display (HUD) ON.

After 45 seconds, does the night vision video image appear normal?

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

Go to Step 3

3

Does the poor video image occur only in cold conditions with the outside air temperature less than 10°C (50°F)?

Go to Step 12

Go to Step 4

4

Inspect the lens of the night vision camera, the windshield, and the HUD for dirt or for debris. Clean as necessary.

Did you find and correct the condition?

Go to Step 21

Go to Step 5

5

Inspect the lens of the night vision camera for cracks, for scratches, or for chips.

Did you find the condition?

Go to Step 19

Go to Step 6

6

Inspect the night vision camera alignment and adjust if needed. Refer to Night Vision Camera Aiming .

Did you find and correct the condition?

Go to Step 21

Go to Step 7

7

  1. Turn the ignition OFF.
  2. Disconnect the night vision camera.
  3. Connect a test lamp between the night vision video low signal circuit at the harness connector of the night vision camera and battery voltage.

Does the test lamp illuminate?

Go to Step 14

Go to Step 8

8

Connect a test lamp between the night vision video high signal circuit at the harness connector of the night vision camera and battery voltage.

Does the test lamp illuminate?

Go to Step 15

Go to Step 9

9

  1. Disconnect C205
  2. Connect a test lamp between the drain wire circuit at the male terminal side of C205 and battery voltage.

Does the test lamp illuminate?

Go to Step 10

Go to Step 11

10

Test the drain wire circuit from the female terminal side of C205 to the end of the drain wire circuit for an open or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 17

11

Test the drain wire circuit from C205 to the HUD connector for an open or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 16

12

Test the ignition 3 voltage circuit of the night vision camera for an open or for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 13

13

Test the ground circuit at terminal E (first design) or C1 terminal B (second design) of the night vision camera for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 17

14

Test the night vision video low signal circuit for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 16

15

Test the night vision video high signal circuit for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 16

16

Inspect for poor connections at the harness connector of the HUD. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 18

17

Inspect for poor connections at the harness connector of the night vision camera. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 20

18

Replace the HUD module. Refer to Head Up Display Module Replacement .

Did you complete the replacement?

Go to Step 21

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19

Replace the night vision camera lens. Refer to Night Vision Camera Protective Window Replacement .

Did you complete the replacement?

Go to Step 21

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20

Replace the night vision camera. Refer to Night Vision Camera Replacement .

Did you complete the replacement?

Go to Step 21

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21

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2