Head-Up Display (HUD) Does Not Change Display Modes

WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Diagnosis of any HUD malfunctions must always begin with verifying proper IPC operation. See INSTRUMENT PANEL CLUSTER (IPC) DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.

If Head-Up Display (HUD) system check has been performed, go to next step. If Head-Up Display (HUD) system check has not been performed, see HEAD-UP DISPLAY (HUD) SYSTEM CHECK under SYSTEM TESTS.
Turn ignition off. Move HUD display dimmer switch to maximum position. See Figure . Turn ignition on. If all segments of HUD display on windshield come on and turn off in 3.5 seconds, go to next step. If HUD does not operate as specified, go to HEAD-UP DISPLAY (HUD) INOPERATIVE .
Press and release the PAGE button on HUD controls and scroll through the following display modes:
- Speedometer
- Speedometer And Gauges
- Speedometer And Tachometer
- Speedometer, Tachometer And Gauges
- Tachometer
If display scrolls through all modes, go to HEAD-UP DISPLAY (HUD) SYSTEM CHECK under SYSTEM TESTS. If display does not scroll through all modes, go to next step.
Check HUD wiring harness between HUD display switch and IPC for an open, short to voltage or short to ground condition. See WIRING DIAGRAMS . If faulty circuit is found and repaired, go to step 10 . If circuits are okay, go to next step.
Check HUD wiring harness between HUD unit and IPC for an open or short to ground condition. If faulty circuit is found and repaired, go to step 10 . If circuits are okay, go to step 8 .
Check HUD wiring harness between HUD display switch and IPC for an open, short to voltage or short to ground condition. See WIRING DIAGRAMS . If faulty circuit is found and repaired, go to step 10 . If circuits are okay, go to next step.
Replace HUD display switch. See DRIVER INFORMATION CENTER (DIC) & HEAD-UP DISPLAY (HUD) CONTROL SWITCHES under REMOVAL & INSTALLATION. After repairs, go to step 10 .
Replace HUD unit. See HEAD-UP DISPLAY (HUD) UNIT under REMOVAL & INSTALLATION. After repairs, go to step 10 .
Replace IPC assembly. See INSTRUMENT PANEL CLUSTER (IPC) under REMOVAL & INSTALLATION. After repairs, go to next step.
Turn ignition off and reconnect all disconnected components and connectors. Recheck system operation. Go to HEAD-UP DISPLAY (HUD) SYSTEM CHECK under SYSTEM TESTS.