Med9.1 Multimap ((free)) -

Always demand that your tuner provide a checksum-corrected OLS file and demonstrate the switch (via cruise control) on a bench rig before flashing your car.

: This modification is generally compatible across all MED9 versions. Technical Implementation med9.1 multimap

Yes, if executed professionally. However, note these realities: Always demand that your tuner provide a checksum-corrected

You cannot write a via the OBDII port alone on the MED9.1 without specialized tools (like CMD Flash or Kess V2 with boot mode patch). For a full backup and multimap injection, you must use BDM (Background Debug Mode) via the 10-pin header on the PCB. However, note these realities: You cannot write a

| Method | Activation | Reliability | | :--- | :--- | :--- | | | Hold "Set" for 2 sec -> Horn beep | Excellent (most common) | | ASR/ESP Button | Short press (ESP toggles), Long press (Map switch) | Good | | Brake + Throttle | Pedal dance (e.g., 10% throttle + brake) | Poor (prone to accidental trigger) | | CAN Bus (Steering Wheel) | Uses existing MFD buttons | Excellent (requires gateway mod) |

Multi-Mapping allows a single ECU to host multiple distinct calibration sets (e.g., Map 1: 95 RON Eco, Map 2: 98 RON Stage 2, Map 3: Valet Mode, Map 4: E85). The driver can switch between these maps in real-time without re-flashing the ECU.