Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2013CORVETTE BASE, 2D CONVERTIBLE, STANDARD TRANS, TRANS MFR CD 6L85M/MM6REPAIR AND DIAGNOSISELECTRICALINSTRUMENT PANEL SYSTEM DISPLAYS AND GAUGESDIAGNOSTIC INFORMATION AND PROCEDURESHEAD-UP DISPLAY MALFUNCTIONCIRCUIT/SYSTEM TESTING
2013 Chevrolet Corvette Base, 2D Convertible, Standard Trans, Trans Mfr CD 6L85M/MM6
Circuit/System Testing
2013 Chevrolet Corvette Base, 2D Convertible, Standard Trans, Trans Mfr CD 6L85M/MM6SECTION Circuit/System Testing
HUD Inoperative
- Ignition OFF, disconnect the harness connector at the HUD.
- Ignition OFF, test for less than 5 ohms between the HUD ground circuit terminal 6 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the HUD.
- Ignition ON, verify a test lamp illuminates when connected between the B+ circuit terminal 1 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the HUD.
- Ignition ON, verify a test lamp illuminates when connected between the HUD dimming up switch signal circuit terminal 11 and B+ while pressing the HUD dimming up switch.
- If the test lamp does not illuminate, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the HUD switch.
- Ignition ON, verify a test lamp illuminates when connected between the HUD dimming down switch signal circuit terminal 12 and B+ while pressing the HUD dimming down switch.
- If the test lamp does not illuminate, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the HUD switch.
- If all circuits test normal, test or replace the HUD.
HUD Switch Malfunction
- Ignition OFF, disconnect the harness connector at the HUD switch.
- Test for less than 5.0 ohms between the HUD switch ground circuit terminal F and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify that all scan tool HUD Switch parameters are Inactive.
- If any are not Inactive, test the signal circuit terminals listed below for a short to ground. If the circuit tests normal, replace the HUD.
- Page switch signal terminal H
- Image up switch signal terminal J
- Image down switch signal terminal K
- Mode switch signal terminal G
- Ignition ON, install a 3A fused jumper wire between the HUD switch signal circuit terminals listed below and the ground circuit terminal F. Verify that all scan tool HUD switch parameters are Active.
- Page switch signal terminal H
- Image up switch signal terminal J
- Image down switch signal terminal K
- Mode switch signal terminal G
- If any are not Active, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the HUD.
- If all circuits test normal, test or replace the HUD switch.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.