Signal Specification

All the values given below are between the terminals stated in column 2 and terminal #B4 column 1 (power ground).

NOTE: It is important to connect the breakout box and check the ground terminals before taking readings.

Fig 1: Identifying Trailer Module Connector Terminals

Courtesy of VOLVO CARS CORPORATION

SIGNAL TABLE CONNECTOR A

Terminal Control module	Terminal Breakout box	Signal type	Ignition off	Ignition on
#A1	-	Right turn signal lamp	-	-
#A2	-	+12 V voltage	0 V	U _bat
#A3	-	Stop lamp, left	-	-
#A4	-	-	-	-
#A5	-	-	-	-
#A6	-	Back-up (reversing) lamps	-	-
#A7	-	Stop lamp, right	-	-
#A8	-	Fog lamps	-	-
#A9	-	-	-	-
#A10	-	Left turn signal lamp	-	-
#A11	-	-	-	-
#A12	-	Parking lamps	-	-

Fig 2: 10 CD Changer Connector Terminals

Courtesy of VOLVO CARS CORPORATION

SIGNAL TABLE, CONNECTOR B

Terminal Control module	Terminal Breakout box	Signal type	Ignition off	Ignition on	Other
#B1	#22	CAN H	-	-	During communication the voltage is 2.5-4.0 V.
#B2	#23	CAN L	-	-	During communication the voltage is 1.0-2.5 V.
#B3	#24	Stop lamp, input signal	-	-	-
#B4	#25	Ground	U _low	U _low	-
#B5	#26	-	-	-	-

Fig 3: Identifying 2 Pin Connector Terminals

Courtesy of VOLVO CARS CORPORATION

SIGNAL TABLE CONNECTOR C

Terminal Control module	Terminal Breakout box	Signal type	Ignition off	Ignition on	Other
#C1	#31	-	-	-	-
#C2	#32	30 supply	U _bat	U _bat	Ignition position 0, I, II and III.