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Signal Description

All values contained below are between the relevant terminal and signal ground, 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) UAC = AC voltage in volts (V)
Ubat = Battery voltage (V) f = Frequency in Hertz (Hz)
Ulow = Voltage approximately 0 V t = Time in seconds (s)
Fig 1: Identifying 10-Bit Connector
GLL139885Courtesy of VOLVO CARS CORPORATION
SIGNAL TABLE CONNECTOR A

Control module terminal  Breakout box terminal  Signal type  Ignition on 
#A1 #1 - -
#A2 #2 Signal malfunction indicator lamp (MIL) Lamp off: U = Ubat
Lamp on: U = Ulow
#A3 #3 Power supply Extended X U = Ubat
#A4 #10 Signal ground U = Ulow
#A5 #9 Signal (+) brake fluid level Lamp off: U = U bat Lamp on: U = Ulow
#A6 #8 Signal (+) parking brake Lamp off: U = U bat Lamp on: U = Ulow
#A7 #7 Control modules communication cable (CAN L) U = 1.5-2.5 V
#A8 #6 Control modules communication cable (CAN H) U = 2.5-3.5 V
#A9 #5 Control modules communication cable (CAN L) U = 1.5-2.5 V
#A10 #4 Control modules communication cable (CAN H) U = 2.5-3.5 V