YANHUA ACDP – CAS Tester – BMW CAS3 CAS4 Tester

CAS Tester indicator light meaning:
1. The indicator D2 flashes to indicate that the tester CAN Bus communicates with the CAS module normally.
2. The indicator light D4 is on for a long time, indicating that the CAS module data is valid.
3. Put the key into the induction coil, and the D3 indicator flashes, indicating that the key is outputting LF signal.
4. If the tester beeps, indicating that this key is the valid key of the corresponding CAS module, or the newly programmed key is learned successfully.