Signal Specification

Fig 1: Connector C, Terminals #C1-#C2

Courtesy of VOLVO CARS OF NORTH AMERICA.

Connector C, terminals #C1-#C2

All values given below are between the terminals stated in column 1 (terminal in the breakout box) and terminal #C2 (ground). This applies unless otherwise indicated in brackets.

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

U=	DC voltage in volts (V)	U_AC =	Alternating current in volts (V)
U_bat =	Battery voltage	f =	Frequency in Hertz (Hz)
U_low =	Voltage approximately 0 V	%duty =	Duty cycle (pulse ratio) as a percentage (%)
t =	Time in milliseconds (ms)	-	-

Terminal in the breakout box	Terminal	Signal type	Ignition on	Other
31	#C1	15-supply (power supply via relay, Central Electronic Module (CEM))	U_bat	Ignition in position II
32	#C2	Ground	U_low	-

Fig 2: Connector B, Terminals #B1-#B30

Courtesy of VOLVO CARS OF NORTH AMERICA.

Connector A, terminals #A1 #A30

All values given below are between the terminals stated in column 1 (terminal in the breakout box) and terminal #C2 (ground). This applies unless otherwise indicated in brackets.

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

U=	DC voltage in volts (V)	U_AC =	Alternating current in volts (V)
U_bat =	Battery voltage	f =	Frequency in Hertz (Hz)
U_low =	Voltage approximately 0 V	%duty =	Duty cycle (pulse ratio) as a percentage (%)
t =	Time in milliseconds (ms)	-	-

Terminal in the breakout box	Terminal	Signal type	Ignition on	Other
1	#A1	Ground, left rear solenoid	U_low	-
2	#A2	Voltage, left rear solenoid	U_low	With the car stationary
3	#A3	Voltage, background lighting keypad (R-line)	U_bat	Pulse width modulation (PWM) signal controlled
4	#A4	Ground, right rear solenoid	U_low	-
5	#A5	Voltage, right rear solenoid	U_low	With the car stationary
6	#A6	Voltage, left front solenoid	U_low	With the car stationary
7	#A7	Ground, left front solenoid	U_low	-
8	#A8	Ground, right front solenoid	U_low	-
9	#A9	Voltage, right front solenoid	U_low	With the car stationary
10	#A10	Signal from the acceleration sensor, car body left front	U≈2 V When the car body is not moving	A varying signal between 0-5 V when the body is moving
11	#A11	Indicator 2 on the keypad (R-line)	Lamp lit: U = U_bat Lamp off: U = U_low -2 V	-
12	#A12	Signal from acceleration sensor suspension left front	U≈2.5 V When the suspension is not moving	A signal varying between 0-5 V when the suspension is moving
13	#A13	Voltage, sensor	5 V	-
14	#A14	Signal, position sensor rear right suspension	U = 0.5 - 4.5 V, depending on the vertical position of the body	-
15	#A15	Communication CAN_L high speed network	1.5-2.5 V	1.5 V, at communication
16	#A16	Communication CAN_H high speed network	2.5-3.5 V	3.5 V, at communication
17	#A17	Signal from the acceleration sensor, car body left rear	U≈2 V When the car body is not moving	A varying signal between 0-5 V when the body is moving
18	#A18	Reserve	-	-
19	#A19	Ground, sensor 1	U_low	-
20	#A20	-	-	-
21	#A21	Ground, keypad (R-line)	U_low	-
22	#A22	Signal from the acceleration sensor, car body right front	U≈2 V When the car body is not moving	A signal varying between 0-5 V when the suspension is moving
23	#A23	Sensor ground 2	U_low	-
24	#A24	Signal from the keypad (R-line)	≈4.5 V	When button is pressed in ≈1-4.5 V
25	#A25	Voltage, left rear position sensor	5 V	-
26	#A26	Indication 1 on the keypad (R-line)	Lamp lit: U = Ubat Lamp not lit: U = Ulow	-
27	#A27	Signal from acceleration sensor suspension right front	U≈2.5 V When the suspension is not moving	A signal varying between 0-5 V when the suspension is moving
28	#A28	Signal, suspension position sensor left rear	U = 0.5 - 4.5 V, depending on the vertical position of the body	-
29	#A29	Indicator 3 on the keypad (R-line)	Lamp lit: U = U_bat Lamp not lit: U = U_low -2 V	-
30	#A30	-	-	-