Signal Specification, Upper Electronic Module (UEM)

Signal specification

Upper electronic module (UEM)




Connector A, terminals #A1-#A22
The following values are measured between the relevant terminal in column 1 and terminal #A20 (signal ground) unless otherwise stated.

Note! Check the ground terminals before starting to take readings with the breakout box.

U = DC in volts (V).
Ubat = battery voltage in volts (V).
Ulow = Voltage close to 0 V.






Sun roof (sun roof module (SRM))




Connector A, terminals #A1-#A10
The following values are measured between the relevant terminal in column 1 and terminal #A5 (signal ground) unless otherwise stated.
U = DC in volts (V).
Ubat = battery voltage in volts (V).
Ulow = Voltage close to 0 V.






Rain sensor




Connector A, terminals #A1-#A5
U = DC in volts (V).
Ubat = battery voltage in volts (V).
Ulow = Voltage close to 0 V.