Head Up Display (HUD) Inoperative. Pontiac Bonneville 2005

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 2005 🢒 Bonneville 🢒 Body 🢒 Instrument Panel, Gages, and Console 🢒 Head Up Display (HUD) Inoperative

Test Description

The number below refers to the step number on the diagnostic table.

This step tests for the proper operation of the circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the vacuum fluorescent (VF) dimming signal circuit is shorted to ground.

Step	Action	Values	Yes	No
Schematic Reference: Head Up Display Schematics
1	Did you perform the Diagnostic System Check - Vehicle?	--	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Turn ON the ignition, with the engine OFF. Adjust the head up display (HUD) dimmer switch to full intensity. Does the HUD image appear on the windshield?	--	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the ignition 3 parameter in the HUD Inputs data list. Does the ignition 3 parameter display ON?	--	Go to Step 4	Go to Step 8
4	Adjust the HUD dimmer switch to full intensity. With a scan tool, observe the vacuum fluorescent (VF) Dim parameter in the HUD data list. Does the scan tool indicate that the VF Dim parameter is near the specified value?	B+	Go to Step 13	Go to Step 5
5	Turn OFF the ignition. Disconnect the HUD switch. Connect a test lamp between the ignition 3 voltage circuit of the HUD switch and a good ground. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate?	--	Go to Step 6	Go to Step 11
6	Turn OFF the ignition. Connect a 3-amp fused jumper between the ignition 3 voltage circuit of the HUD switch and the VF dimming signal circuit. Turn ON the ignition, with the engine OFF. With a scan tool, observe the VF Dim parameter. Does the scan tool indicate that the VF Dim parameter is near the specified value?	B+	Go to Step 9	Go to Step 7
7	Test the VF dimming signal circuit for an open, for high resistance, or 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 14	Go to Step 10
8	Test the ignition 3 voltage circuit of the HUD for an open, for high resistance, or 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 14	Go to Step 10
9	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 14	Go to Step 12
10	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?	--	Go to Step 14	Go to Step 13
11	Repair the open, the high resistance, or the short to ground in the ignition 3 voltage circuit of the HUD switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?	--	Go to Step 14	--
12	Replace the HUD switch. Refer to Head Up Display Switch Replacement . Did you complete the replacement?	--	Go to Step 14	--
13	Replace the HUD. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?	--	Go to Step 14	--
14	Operate the system in order to verify the repair. Did you correct the condition?	--	System OK	Go to Step 2