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.
Heartbeat Sensor (Structure Week -201020)
The heart beat sensor is mounted against the body, to the right, under the floor in the cargo compartment. The sensor is only on vehicles with the keyless function. The sensor senses vibrations in the body that are created by somebody's heart beat inside the vehicle. The sensor can be activated from the remote key using the information button.
The heartbeat sensor does not trigger the alarm functions in the vehicle. The sensor only indicates that somebody is in the vehicle in the event of a request from the remote key/Volvo Personal Communicator.
The heart beat sensor is directly connected to the central electronic module (CEM) and communicates serially via LIN with it.
The sensor is powered via a fuse from the central electronic module (CEM) and is grounded in the body.
The heartbeat sensor is only available on vehicles manufactured structure week -201020.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.