Schematic Reference: Head Up Display Schematics

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

Adjust the intensity of the head up display (HUD) using the HUD dimmer switch.

Does the intensity of the HUD vary?

Go to Step 3

Go to Head Up Display (HUD) Intensity Does Not Vary

1. Turn the ignition ON, with the engine OFF.
2. Adjust the HUD up then down with the HUD up/down switch.

Does the HUD display adjust properly?

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

Go to Step 4

1. Turn the ignition OFF.
2. Disconnect the HUD module.
3. Connect a test lamp between the up control circuit at the HUD module and a good ground. Refer to Circuit Testing in Wiring Systems.
4. Turn the ignition ON, with the engine OFF.
5. Move the HUD up/down switch to the UP position.

Does the test lamp illuminate?

Go to Step 5

Go to Step 6

1. Connect a test lamp between the down control circuit at the HUD module and a good ground. Refer to Circuit Testing in Wiring Systems.
2. Move the HUD up/down switch to the Down position.

Does the test lamp illuminate?

Go to Step 9

Go to Step 7

Test the HUD up control circuit for an open or for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 8

Test the HUD down control circuit for an open or for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 8

Inspect for poor connections at the harness connector of the HUD switch. 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 12

Go to Step 10

Inspect for poor connections at the harness connector of the HUD module. 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 12

Go to Step 11

Replace the HUD switch. Refer to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information.

Did you complete the replacement?

Go to Step 12

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

Did you complete the replacement?

Go to Step 12

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2