A device can request network activity without proving that the complete function has recovered. Wake-up and successful operation answer different questions.

Interpreting the evidence

For an accessory that briefly comes alive after unlocking, record what happens next and whether the request repeats. Compare the power supply and control information during that sequence. Repeated wake activity may be relevant to a battery-drain complaint even when the device never completes its normal task.

Keep this evidence

Keep the unlock timeline, current recording if available and the affected function’s scan results.

Do not treat one visible wake pulse as a passed functional test. The original customer operation still needs to be checked.

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.