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Sun Roof (Sun Roof Module (SRM))

Fig 1: Identifying Sunroof Module Connector A Terminals
GLL104021Courtesy of VOLVO CARS CORPORATION

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 near 0 V.

Terminal, control module  Signal type  Ignition off 
Active/not active 		 Ignition on 
Active/not active 		 Miscellaneous 
#A1 Power supply to the sun roof motor Ubat Ubat -
#A2 Sun roof forward, control signal Ubat /0 V Ubat /0 V Pulsed signal when active.
#A3 Sun roof tilt, control signal Ubat /0 V Ubat /0 V Pulsed signal when active.
#A4 Serial communication (Volcano lite) Ubat Ubat The voltage is 0 V - Ubat during communication. Ubat is the default.
#A5 Signal ground Ulow Ulow -
#A6 Power supply to the electronics in the sun roof module (SRM) Ubat (only for 5 minutes according to conditions on the right) Ubat Active when the ignition is off and neither of the front doors have been opened.
#A7 Sun roof auto, control signal Ubat /0 V Ubat /0 V Pulsed signal. Active when switching.
#A8 Sun roof backward, control signal Ubat /0 V Ubat /0 V Pulsed signal when active.
#A9 Power supply to sun roof switch Ubat /Ubat Ubat /Ubat Pulsed signal when active.
#A10 Power ground Ulow Ulow -
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