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 MANUALSBUICK2019ENVISION BASEREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTINFOTAINMENTCELLULAR, ENTERTAINMENT, AND NAVIGATION SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC B1024 (HUMAN MACHINE INTERFACE CONTROL MODULE)CIRCUIT/SYSTEM VERIFICATION
2019 Buick Envision Base
Circuit/System Verification
2019 Buick Envision BaseSECTION Circuit/System Verification
NOTE:
Allow the vehicle cabin to cool if the temperature inside the vehicle is excessive before proceeding with this diagnostic procedure.
- Verify the DTC sets outside of the Conditions for Running and Setting. Since most occurrences of this DTC are caused by extreme vehicle cabin temperatures due to ambient conditions, review with the customer the conditions under which the DTC set.
- If the DTC sets within the Conditions for Running and Setting.
The system is operating as designed, All OK.
- Go to next step: If the DTC sets outside the Conditions for Running and Setting.
- If the DTC sets within the Conditions for Running and Setting.
- Using the scan tool, clear the DTC.
- Verify the DTC does not set while operating the infotainment system under the conditions the customer experienced the concern.
- If the DTC sets
Replace the K74 Human Machine Interface Control Module
- Go to next step: If the DTC does not set
- If the DTC sets
- All OK.
RENDER: 1.0x
NO RELATED
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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.