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.
Configuration Of The TPMS System
The TPMS system is self-learning. This means that when the vehicle is driven and the sensors transmit messages, the Central electronic module (CEM) receives and registers the ID numbers that the sensors transmitted.
After a process of elimination during a certain period, the Central electronic module (CEM) then decides that the sensors with the four most frequently received ID numbers belong to the vehicle.
There are two diagnostic procedures that can be activated from the diagnostic tool to make the system fully functioning from the factory or if any remedial actions has been carried out at the workshop.
- EOL test (End Of Line, factory test). The procedure is run after the ID number has been programmed in the vehicle. The purpose of this is to check that the entire chain with receiver, Central electronic module (CEM) and Driver information module (DIM) function and that the vehicle can receive transmissions from the sensors when the last tests are run in the factory.
- WS test (Workshop test). The procedure is used to program new IDs to the Central electronic module (CEM) and to check that the system functions correctly. For example, when a sensor has needed to be replaced or if the Central electronic module (CEM) has been replaced.
The differences between the two procedures are that the factory tests only finish OK after the four sensor IDs that are already programmed have been received properly. The workshop test finishes OK as soon as the four sensor IDs have been received.
During the workshop test, it is important to check that no other tests are running around the vehicle. There is a risk that a sensor ID from another vehicle is received by the vehicle being programmed.
Use the Manual With the Right Hardware
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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.
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