Guide
Technical documentation for simos.app, ECU software identification and flashing workflows. Use this index to find the relevant reference or procedure.
Start here
New to ECU flashing? Read Flashing Information first. It covers the checks and precautions to review before starting a flash or unlock.
Articles
Reference material and step-by-step procedures.
Software identification
Understand boxcodes, EPK, ASW and CAL, and why an exact calibration match matters.
Boxcodes, EPK, ASW and CAL →
Understand boxcodes, EPK, ASW and CAL, and why an exact calibration match matters.
Boxcodes, EPK, ASW and CAL →
Flashing safety
Review the essential safety information before starting a flash or unlock.
Flashing Information →
Review the essential safety information before starting a flash or unlock.
Flashing Information →
Flash types
Choose between CAL and full flash for calibration, patch or software changes.
CAL Flash and Full Flash →
Choose between CAL and full flash for calibration, patch or software changes.
CAL Flash and Full Flash →
DQ250
Flashing, immobilizer handling and torque-limit patches for DQ250 TCUs.
DQ250 flashing and immobilizer →
Flashing, immobilizer handling and torque-limit patches for DQ250 TCUs.
DQ250 flashing and immobilizer →
DSG swap
DQ200 and DQ250 wiring pinouts, terminal assignments and connector references.
DSG swap pinouts →
DQ200 and DQ250 wiring pinouts, terminal assignments and connector references.
DSG swap pinouts →
Simos 18 ECU
Pin assignments, the Easy Wastegate and WG N75 patches for wastegate control, and the Main Patch Map Switch.
Simos 18 ECU →
Pin assignments, the Easy Wastegate and WG N75 patches for wastegate control, and the Main Patch Map Switch.
Simos 18 ECU →