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 MANUALSBUICK2018REGAL BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 64 (REMOTE FUNCTIONS SYSTEM)
2018 Buick Regal Base
Section 64 (Remote Functions System)
2018 Buick Regal BaseSECTION Section 64 (Remote Functions System)
WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Schematic Wiring Diagrams
- Diagnostic Information and Procedures
- DTC B305D
- DTC B3101
- DTC B3105
- DTC B3106
- DTC B3109-B3113
- DTC B310D-B310F
- DTC B3119
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B3120
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B3121
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B3122
- DTC B3123
- DTC B3124
- Symptoms - Remote Functions
- Garage Door Opener Malfunction
- No Remote Detected
- Keyless Entry System Malfunction (Active)
- Keyless Entry System Malfunction (Passive)
- Remote Vehicle Start Malfunction
- Repair Instructions
- Description and Operation
- Garage Door Opener Description and Operation
- Keyless Entry System Description and Operation (without BTM)
- Notes
- Keyless Entry Transmitters
- OnStar® Remote Link (if equipped)
- Body Control Module (BCM)
- Remote Control Door Lock Receiver
- Unlock Doors
- Lock All Doors
- Trunk Release, if equipped
- Power Liftgate, if equipped
- Vehicle Locator/Panic Alarm
- Remote Vehicle Start, if equipped
- Enable/Disable Remote Vehicle Start
- Hood Ajar Switch
- Remote Vehicle Start Circuit Description
- Keyless Entry Personalization
- Keyless Entry System Description and Operation (with BTM)
- Notes
- Keyless Entry Transmitters
- Keyless Entry Transmitter Slots
- Door Antennas
- Rear Fascia Antenna
- Front Console Passive (Instrument Panel) Antenna
- Rear Console Antenna
- Rear Compartment Antenna
- Body Control Module (BCM)
- Immobilizer Antenna Coil Assembly
- Keyless Entry Control Module
- OnStar® Remote Link (if equipped)
- Unlock Driver Door Only - Active
- Unlock All Doors - Second Operation - Active
- Unlock Driver Door Only - Passive
- Unlock All Doors - Passive
- Lock All Doors - Active
- Lock All Doors - Passive
- Rear Compartment Lid Release - Active
- Rear Compartment Lid Release - Passive
- Vehicle Locator/Panic Alarm/Active
- Remote Vehicle Start/Active
- Enable/Disable Remote Vehicle Start/Active
- Hood Ajar Switch/Active
- Remote Vehicle Start Circuit Description/Active
- Keyless Entry Personalization
- Special Tools and Equipment
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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.