A LIN circuit needs the intended pull-up arrangement to establish its recessive level. A missing or altered connection can change the signal.

What to check next

Review the exact circuit rather than adding a resistor based on a generic diagram. Compare the repaired section with the original wiring and inspect any changes made inside a controller. The leader and responder may have different electrical responsibilities.

Useful information for an enquiry

Record the part references and whether the fault existed before the wiring was modified.

A waveform improvement after an improvised modification is not proof of a correct repair. The finished arrangement must match the intended design.

Speak to AXION

For CAN-bus and vehicle-network diagnostics, send your vehicle details and fault report. Workshop assessment is in Didcot, Oxfordshire. Suitable postal or remote work is confirmed before booking.

Technical background from NXP. The referenced design explains the principle; the vehicle-specific procedure determines the repair.