Front wheel sensor

Fig 1: Identifying Hall Sensor (Active Sensor) Terminals

Courtesy of VOLVO CARS CORPORATION

Rear wheel sensor

Fig 2: Identifying Hall Sensor (Active Sensor) Terminals

Courtesy of VOLVO CARS CORPORATION

Connector terminal	Control module terminal	Signal type	Other
#1	#45	Power supply, front left	The sensor receives 12 V from the control module.
	#14	Signal output left front	Taxi signal. The signal can be used to check the wheel sensor's signal
#2	#46	Signal ground	The sensor is grounded through the control module.
#1	#36	Power supply, rear left	The sensor receives 12 V from the control module.
	#9	Signal output left rear	Taxi signal. Can be used to check the wheel sensor's function
#2	#37	Signal ground	The sensor is grounded through the control module.
#1	#34	Power supply, front right	The sensor receives 12 V from the control module.
	#11	Signal output right front	Taxi signal. Can be used to check the wheel sensor's function.
#2	#33	Signal ground	The sensor is grounded through the control module.
#1	#43	Power supply, rear right	The sensor receives 12 V from the control module.
	#7	Signal output right rear	Taxi signal. Can be used to check the wheel sensor's function.
#2	#42	Signal ground	The sensor is grounded through the control module.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Wheel Sensor 7/31, 7/32, 7/56, 7/57: Terminal