Schematic Reference: Night Vision Schematics

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

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Go to Step 2

Go to Symptoms - Instrument Panel, Gages and Console

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 ON the ignition, with the engine OFF.
5. Turn the headlamps ON.
6. Turn the head-up display (HUD) ON.
7. Press the UP button and then the DOWN button on the HUD switch.

Does the night vision image move up when the UP button is pressed and down when the DOWN button is pressed?

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

Go to Step 3

1. Turn OFF the ignition.
2. Disconnect the HUD.
3. Turn ON the ignition, with the engine OFF.
4. With a DMM, measure the voltage from the night vision image down signal circuit to a good ground.

Does the voltage measure at or near the specified value?

0 V

Go to Step 4

Go to Step 7

With the DMM, measure the voltage from the night vision image up signal circuit to a good ground.

Does the voltage measure at or near the specified value?

0 V

Go to Step 5

Go to Step 8

1. Press the DOWN button on the HUD switch.
2. With the DMM, measure the voltage from the night vision image down signal circuit to a good ground.

Does the voltage measure at or near the specified value?

12 V

Go to Step 6

Go to Step 9

1. Press the UP button on the HUD switch.
2. With the DMM, measure the voltage from the night vision image up signal circuit to a good ground.

Does the voltage measure at or near the specified value?

12 V

Go to Step 11

Go to Step 10

Test the night vision image down signal circuit for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 15

Go to Step 12

Test the night vision image up signal circuit for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 15

Go to Step 12

Test the night vision image down signal circuit 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?

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Go to Step 15

Go to Step 12

Test the night vision image up signal circuit 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?

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Go to Step 15

Go to Step 12

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?

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Go to Step 15

Go to Step 13

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

Did you find and correct the condition?

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Go to Step 15

Go to Step 14

Replace HUD. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

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Go to Step 15

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Replace the HUD switch. Refer to Head Up Display Switch Replacement .

Did you complete the replacement?

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Go to Step 15

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Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2