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 MANUALSCADILLAC2009STS BASE, 4.6 A, RWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSKEYLESS ENTRY SYSTEM AND REMOTE FUNCTIONS
2009 Cadillac STS Base, 4.6 A, RWD
Keyless Entry System And Remote Functions
2009 Cadillac STS Base, 4.6 A, RWDSECTION Keyless Entry System And Remote Functions
- Specifications
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Diagnostic Code Index
- Diagnostic Starting Point - Remote Functions
- DTC B3119
- DTC B3120
- DTC B3121
- DTC B3122
- DTC B3123
- Symptoms - Remote Functions
- Garage Door Opener Inoperative
- Key Fob Not Detected
- Keyless Entry System Inoperative (Active)
- Keyless Entry System Inoperative (Passive)
- Remote Vehicle Start Inoperative
- Repair Instructions
- Ignition Lock Key Transmitter Antenna Replacement - Floor Console (Cup Holder)
- Ignition Lock Key Transmitter Antenna Replacement - Floor Console (Rear)
- Ignition Lock Key Transmitter Antenna Replacement - Rear Compartment
- Remote Control Door Lock Receiver Replacement
- Remote Control Door Lock Receiver Antenna Replacement
- Garage Door Opener Programming - Universal
- Garage Door Opener Replacement
- Transmitter Programming (North America, except Canada)
- Transmitter Programming (Canada, Europe, Asia, Middle East)
- Description and Operation
- Garage Door Opener Description and Operation
- Keyless Entry System Description and Operation
- Keyless Entry System Description and Operation
- Keyless Entry Transmitters
- Door Antennas
- Rear Compartment Antenna
- Console Passive Antenna
- Console Active Antenna
- Remote Control Door Lock Receiver (RCDLR)
- 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
- Remote Vehicle Start (RVS)
- Enable/Disable RVS
- Hood Ajar Switch
- RVS Circuit Description
- Keyless Entry Personalization
- Low Fob Battery Message
- 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.