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Home >> Cadillac >> 2006 >> XLR Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> Head Up Display (HUD) Image Adjustment Inoperative

Head Up Display (HUD) Image Adjustment Inoperative

Head Up Display (HUD) Image Adjustment Inoperative

Step Action Yes No
Schematic Reference: Head Up Display Schematics 
Connector End View Reference: Instrument Panel, Gages, and Console Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Turn ON the ignition, 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 Go to Step 3 
3
  1. Turn OFF the ignition.
  2. Disconnect the HUD display connector.
  3. Connect a test lamp between the HUD display up circuit and B+ at the instrument panel cluster (IPC). Refer to Circuit Testing .
  4. Turn ON the ignition, 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 
4
  1. Connect a test lamp between the HUD display down circuit and B+ at the IPC. Refer to Circuit Testing .
  2. Move the HUD up/down switch to the DOWN position.
Does the test lamp illuminate?		 Go to Step 12  Go to Step 6 
5 Test the HUD display up circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 15  Go to Step 9 
6 Test the HUD display down circuit for the following:
  • An open
  • A short to ground
  • A high Resistance

Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 15  Go to Step 7 
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 .
Did you find and correct the condition?		 Go to Step 15  Go to Step 8 
8 Test the HUD display up circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 15  Go to Step 10 
9 Test the HUD display up circuit for an open or high resistance at the HUD switch. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 15  Go to Step 10 
10 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 .
Did you find and correct the condition?		 Go to Step 15  Go to Step 11 
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 
12 Inspect for poor connections at the harness connector of the HUD display. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 Go to Step 15  Go to Step 13 
13 Replace the HUD display. Refer to Instrument Cluster Head Up Display Replacement .
Did you complete the replacement?		 Go to Step 15  -
14 Replace the IPC. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 15  -
15 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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