Did you perform the Instrument Cluster Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

1. Turn ON the ignition, with the engine OFF.
2. Adjust the head up display (HUD) dimmer switch to full intensity, then back to full dim.

Does the HUD dim properly?

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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 module.
3. Turn ON the ignition, with the engine OFF.
4. Connect a test lamp between the dimming control circuit and a good ground.
5. Adjust the HUD to full intensity, then back to full dim.

Does the test lamp go from full intensity then dim?

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Go to Step 6

Go to Step 4

Test the dimming signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 9

Go to Step 5

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

Did you find and correct the condition?

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Go to Step 9

Go to Step 7

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

Did you find and correct the condition?

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Go to Step 9

Go to Step 8

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

Did you complete the repair?

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Go to Step 9

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

Did you complete the repair?

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Go to Step 9

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Operate the system in order to verify the repair.

Did you correct the condition?

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Go to Step 2

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