Schematic Reference: Head Up Display Schematics

Did you perform the IPC Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

1. Turn the ignition ON, with the engine OFF.
2. Adjust the head up display (HUD) UP, then DOWN.

Does the HUD display adjust properly?

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

Go to Step 3

1. Turn the ignition OFF.
2. Disconnect the HUD connector.
3. Connect a test lamp between the HUD display UP circuit and B+. 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 4

Go to Step 5

1. Connect a test lamp between the HUD display down circuit and B+ at the IPC. 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 12

Go to Step 6

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

Did you find and correct the condition?

Go to Step 15

Go to Step 9

Test the HUD display down circuit for an open, a short to ground, or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 7

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

Did you find and correct the condition?

Go to Step 15

Go to Step 8

Test the HUD display up circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 10

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

Did you find and correct the condition?

Go to Step 15

Go to Step 10

Inspect for poor connections at the harness connector of the HUD dimmer switch. 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 15

Go to Step 11

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

Did you find and correct the condition?

Go to Step 15

Go to Step 14

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 15

Go to Step 13

Replace the HUD. Refer to Instrument Cluster Head Up Display Replacement .

Did you complete the replacement?

Go to Step 15

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Replace the IPC. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

Go to Step 15

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2