Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
USB Connector
Version
- MCM-SW = unit software version
- TI-SW = radio software version
- Various software versions of navigation CD inserted are shown with the other values.
System Test
- SENSORTEST = sensor test.
- INTERNAL TEST = Gyrocompass and GPS receiver internal test.
- CALIBRAT. DATA = calibration values.
After calling up this menu item, it may take up to 10 seconds before test results are displayed.
Sensor Test
- GYRO = middle value should be between 512-514 when vehicle is still
- TACHO = display of tachometer impulses counted
- km/h = display of speed driven after calibration
- DIRECTION = Reverse light signal activated "↓" or not activated "↑"
- GPS-ANT. OK = GPS antenna test (if "0" is shaded = no signal, if "I" shaded = signal present)
After calling up this menu item, it may take up to 10 seconds before test results are displayed.
Internal Test
- GYRO = successful test = "OK", negative test = "-". Corresponding component is faulty or wire connection is interrupted
- GPS-REC. = successful test = "OK", negative test = "-". Corresponding component is faulty or wire connection is interrupted
After calling up this menu item, it may take up to 10 seconds before test results are displayed.
CALIBRAT. DATA
- 1 = This value indicates the calibration value determined. If this value is "0", unit is not calibrated
- 2 = This values is dynamic and gives no indication about the condition of the unit
- 3 = This values is dynamic and gives no indication about the condition of the unit
- 4 = This values is dynamic and gives no indication about the condition of the unit
- 5 = This value indicates the position of the gyrocompass. In rest position, value should be "512 +/- -2"
- 6 = This values is dynamic and gives no indication about the condition of the unit
- 7 = This values is dynamic and gives no indication about the condition of the unit
- 8 = This values is dynamic and gives no indication about the condition of the unit
After calling up this menu item, it may take up to 10 seconds before test results are displayed.
Errors
- CALIB. = number of malfunctions found is displayed here
- SENSOR = number of malfunctions found is displayed here
- INTERNAL = number of malfunctions found is displayed here
- CD-DRIVE = number of malfunctions found is displayed here
- QUIT = by confirming menu item with "CLEAR", DTC memory is erased
After calling up this menu item, it may take up to 10 seconds before test results are displayed.
Possible Error Messages
- CALIB. = "ERROR" means a malfunction occurred during calibration
- SENSOR = "GPS" means there is a reception problem or there is no communication with the GPS module. "GAL" means there is a malfunction in the speed-dependent volume control (GALA). "R" means reverse light signal was not recognized
- INTERNAL = "ERROR" means there are malfunctions in the gyrocompass or GPS receiver
- CD-DRIVE = "CD" means malfunctions occurred when reading the CD. "TEMP" means the temperature in the CD drive is too high
A malfunction is only display if it is active at the time of the malfunction check and the internal malfunction counter has exceeded a certain number for frequency of this malfunction.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.