Mercedes Transfer Case Control Module Calibration
Supported coding features by StarCOM diagnostic tool https://www.obdtester.com/starcom
Transfer Case Control Module Calibration
What it does
- Calibrates the transfer case control module (TCCM)
- Synchronizes actuator positions and range selection
- Ensures proper 4WD / AWD operation and gear engagement
When it is required
- After replacing the transfer case control module
- After actuator or sensor replacement
- After battery disconnection or control unit reset
- When incorrect 4WD / AWD behavior or fault codes appear
Conditions that must be met
- Vehicle stationary and level
- Parking brake applied
- Ignition ON, engine OFF (or as instructed)
- Stable battery voltage
- No active critical drivetrain fault codes
What happens during calibration
- Module moves shift actuators through all positions
- End positions and mechanical limits are learned
- ECU stores reference values for:
- High/low range selection
- Center differential locking (if equipped)
- Gear position feedback
If calibration is not performed
- Transfer case may not engage correctly
- Fault codes or warning lights may remain
- Incorrect 4WD / AWD operation
- Possible drivetrain damage
After calibration
- Verify transfer case positions in live data
- Test 4WD / AWD engagement under safe conditions
- Confirm correct system operation and no warning lights