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Test Q: Heads-Up Display Intensity Does Not Change

  1. If IPC diagnostic system check was performed, go to next step. If IPC diagnostic system check was not performed, go to INSTRUMENT PANEL CLUSTER DIAGNOSTIC SYSTEM CHECK  . After performing IPC diagnostic system check, go to next step.
  2. Turn ignition on. Move HUD display dimmer switch to maximum position then back to dim. See Figure . If HUD display dims properly, problem may be intermittent. To diagnose intermittent, go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS . If HUD does not dim properly, go to next step.
  3. Turn ignition off. Disconnect HUD display connector. See HEADS-UP DISPLAY UNIT  . Turn ignition on. Connect test light between HUD display connector terminals No. 6 (Black wire) and No. 7 (Black wire). Move HUD display dimmer switch to maximum position then back to dim. If test light dims properly with switch, go to step  6 . If test light does not dim properly with switch, go to next step.
  4. Check for short to ground in Black wire between HUD display connector terminal No. 6 and IPC connector terminal No. 3. Repair as necessary. After repairs, go to step  8 . If circuit is okay, go to next step.
  5. Replace HUD switch. See DRIVER INFORMATION CENTER & HEADS-UP DISPLAY CONTROL SWITCHES  . If HUD operates properly, go to step  8 . If HUD does not operate properly, go to next step.
  6. Replace HUD display. See HEADS-UP DISPLAY UNIT  . If HUD operates properly, go to step  8 . If HUD does not operate properly, go to next step.
  7. Replace IPC. See INSTRUMENT PANEL CLUSTER  . After repairs, go to next step.
  8. Recheck system operation to verify the repair. If system operates properly, repair is complete. If system does not operate properly, go to step  2 .
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