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Signal Specification

All values given below are between the terminals stated in column 1 and terminal #A10 in column 2 (signal ground). This applies unless otherwise indicated in brackets.

NOTE: It is important to connect the breakout box and check the ground terminals before taking readings.
U= DC voltage in volts (V) Ulow = Voltage approximately 0 V
Ubat = Battery voltage (V) - -
Fig 1: Identifying Connector (D) Terminals
GLL104043Courtesy of VOLVO CARS CORPORATION
CONNECTOR A

Terminal  Breakout box terminal  Signal type  Ignition on  Ignition off  Other 
#A1 #A1 30 supply U = Ubat U = Ulow -
#A2 #A2 Reserve - - -
#A3 #A3 Communication CAN L low speed network During communication the voltage is 1.5-2.5 V -
#A4 #A4 Communication CAN L low speed network During communication the voltage is 1.5-2.5 V -
#A5 #A5 Communication CAN_H low speed network During communication the voltage is 2.0-3.5 V -
#A6 #A6 Communication CAN_H low speed network During communication the voltage is 2.0-3.5 V -
#A7 #A7 Reserve - - -
#A8 #A8 Reserve - - -
#A9 #A9 Reserve - - -
#A10 #A10 Power ground U = Ulow U = Ulow -
Fig 2: Identifying Connector C
GLL108086Courtesy of VOLVO CARS CORPORATION
CONNECTOR C

Terminal  Breakout box terminal  Signal type  Ignition on  Other 
#C1 - MOST input signal - Optical input signal
#C2 - MOST output signal - Optical output signal