Issue & Fix: When the YANHUA Mini ACDP 2 reports a “Clear ISN data error” while clearing the BMW 8HP E84 ISN via OBD, resolve the operation by activating Module 40 authorization and switching to the “8HP Reset EWS (E/F/G Chassis, bench)” function.
Technical Explanation
The OBD method is insufficient for this specific ISN clearing task, necessitating a direct bench connection to facilitate the reset.
Action Steps
1. Activate the Module 40 Authorization within the ACDP software.
2. Disconnect the OBD setup and prepare for a bench connection, connecting directly to the transmission unit.
3. Select the “8HP Reset EWS (E/F/G Chassis, bench)” option to execute the clear.
Final Result
The ISN data clears successfully with the bench-mode configuration.
