GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2001 🢒 Grand Prix 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Head Up Display (HUD) Inoperative

Step

Action

Values

Yes

No

Schematic Reference: Head Up Display Schematics

1

Did you review the system operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms - Instrument Panel, Gages and Console

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

Is the HUD display visible?

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

Go to Step 3

3

Test the ignition 1 voltage circuit for an open or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Repairs.

Did you find and correct the condition?

--

Go to Step 13

Go to Step 4

4

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

Did you find and correct the condition?

--

Go to Step 13

Go to Step 5

5
  1. Turn the ignition OFF.
  2. Disconnect the HUD switch.
  3. Connect a fused jumper between the ignition 1 voltage circuit of the HUD switch and the HUD switch signal circuit. Refer to Circuit Testing in Wiring Systems.
  4. Turn the ignition ON, with the engine OFF.

Does the HUD illuminate?

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Go to Step 10

Go to Step 6

6

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

Did you find and correct the condition?

--

Go to Step 13

Go to Step 7

7
  1. Leave fused jumper from step 5 connected.
  2. Connect another fused jumper between the ignition 1 voltage circuit of the HUD switch and the illuminated display signal circuit of the HUD. Refer to Circuit Testing in Wiring Systems.
  3. Turn the ignition ON, with the engine OFF.

Does the HUD illuminate?

--

Go to Step 8

Go to Step 9

8

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

Did you find and correct the condition?

--

Go to Step 13

Go to Step 9

9

Inspect for poor connections at the harness connector of the HUD module. 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 13

Go to Step 12

10

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?

--

Go to Step 13

Go to Step 11

11

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

Did you complete the replacement?

--

Go to Step 13

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12

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

Did you complete the replacement?

--

Go to Step 13

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13

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2