Signal description ABS: Notes

All the values shown are between the connection shown in column 1 and connection #8 or #24 (ground), except where shown in brackets

U= DC voltage, volts (V) Ubat= Battery voltage (V) Ulow= Voltage close to 0 V UAC= AC voltage (V)

Conn.	Signal type	Ignition on/idling	Other notes
#1	Signal (-) wheel sensor RH rear	U ≈ 2, 3V
#2	Signal (-) wheel sensor LH rear	U ≈ 2, 3 V
#3	Signal (+), wheel sensor RH front	U ≈ 2, 3 V	UAC increases with wheel speed Min 150 mV AC when wheel speed is 1 r/s
#4	Signal (+) wheel sensor LH front	U ≈ 2, 3 V	UAC increases with wheel speed Min 150 mV AC when wheel speed is 1r/s
#5	Signal (+) EBD-pressure sensor	Closed: U = 5 - 6 V Open: 1 - 2 V less than Ubat	Pressure sensor opens when braking hard
#6	Signal Speed (To instrument panel)	U = 0 - U bat	Voltage depends on position of front wheel
#7	Signal (-) EBD-pressure sensor	Open: U ≈ Ul g Closed: U = 5 - 6 V	Pressure sensor opens when braking hard
#8	Ground (measured towards the battery negative terminal)	U ≈ Ulow
#9	30-supply Inlet and outlet valves (Voltage from battery to inlet and outlet valves)	U ≈ Ubat	Voltage to inlet and outlet valves and signal to control module on voltage supply to inlet and outlet valves
#10	Signal (+) wheel sensor LH rear	U ≈ 2, 3 V	UAC increases with the wheel speed min 150 mV AC when wheel speed is 1 r/s

Conn.	Signal type	Ignition on/idling	Other notes
#11	Signal (-) wheel sensor LH front	U ≈ 2,3 V
#12	Signal Brake light switch	Open: U = Ulow Closed: U =Ubat	Brake light switch cuts out on braking
#13	Data Link Connector	U ≈ 1 - 2 V under Ubat	Note: Other voltages apply if the Volvo System Tester is connected to the Data Link Connector
#14
#15	Signal TRACS control signal circuit switch TRACS warning light	Light on: U = 0 -7 V Light off: U = Ubat Switch pressed: U = Ulow	The signal is grounded when the switch is pressed, TRACS is switched on/off. If the TRACS warning light comes on, TRACS is disabled.
#16	ABS control signal warning light	Light on: U over approx. 7V Light off: U = Ulow	If the control module grounds the signal, the ABS warning light goes out. The warning light comes on if the control module increases voltage over 7V
#17	Signal (+) wheel sensor RH rear	U ≈ 2,3 V	UAC increases with the wheel's speed Min 150 mV AC at a wheel speed of 1 r/s
#18	Signal (-) wheel speed RH front	U ≈ 2,3 V
#19
#20
#21
#22
#23	15I- supply (voltage supply from ignition switch)	U ≈ Ubat
#24	Ground (measured relative to battery negative terminal)	U ≈ Ulow
#25	30-supply pumpmotor (voltage supply from battery)	U ≈ Ubat