Schematic Reference: Head Up Display Schematics

Did you perform the Instrument Cluster Diagnostic System Check?

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.
3. Turn on the high beam headlamps.

Does the HUD display illuminate normally?

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

Go to Step 3

Do the different indicators in the HUD display flash in and out?

Go to Step 5

Go to Step 4

Turn ON the ignition, with the engine OFF.

Does the speedometer and the km/h indicator illuminate in the HUD display?

Go to Step 6

Go to Step 9

1. Turn OFF the ignition.
2. Disconnect the HUD module.
3. Connect a test lamp between the strobe signal circuit and a good ground. Refer to Circuit Testing in Wiring Systems.
4. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 20

Go to Step 16

1. Turn OFF the ignition.
2. Disconnect the HUD module.
3. Connect a test lamp between the data signal circuit and battery positive voltage. Refer to Circuit Testing in Wiring Systems.
4. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 17

Go to Step 7

1. Connect a test lamp between the clock signal circuit and battery positive voltage. Refer to Circuit Testing in Wiring Systems.
2. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 18

Go to Step 8

Connect a test lamp between the clock signal circuit and a good ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

Go to Step 20

Go to Step 19

1. Disconnect the HUD module.
2. Connect a test lamp from the HUD switch signal circuit to a good ground.
3. Turn the ignition ON.

Does the test lamp illuminate?

Go to Step 12

Go to Step 10

Test the ignition positive voltage circuit of the HUD switch for an open, a short to ground or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 11

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

Did you find and correct the condition?

Go to Step 26

Go to Step 22

Test the ignition positive voltage circuit of the HUD module for an open, a short to ground, or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 13

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

Did you find and correct the condition?

Go to Step 26

Go to Step 14

1. Disconnect the HUD module.
2. Connect a test lamp between the data signal and a good ground.

Does the test lamp illuminate?

Go to Step 20

Go to Step  15

Test the data signal circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 21

Test the strobe signal circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 21

Test the data signal 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 26

Go to Step 21

Test the clock signal 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 26

Go to Step 21

Test the clock signal circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 21

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 26

Go to Step 23

Inspect for poor connections at the harness connector of the IPC. 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 26

Go to Step 25

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 26

Go to Step 24

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

Did you complete the replacement?

Go to Step 26

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

Did you complete the replacement?

Go to Step 26

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Replace the IPC. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

Go to Step 26

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2