Engine Speed Sensor, Crankshaft

GENERAL

Fig 1: Identifying Crankshaft Sensor

Courtesy of VOLVO CARS CORPORATION

Type

Inductive sensor with permanent magnet. Output voltage is proportional to the magnet flow's change through the sensor. Higher rpm = higher voltage.

Characteristic

Output voltage 5 - 16V at 650 rpm.

Output voltage ≥ 100V at 7000 rpm.

Other information

Certain markets only.

TERMINAL

Connector terminal	Control module terminal	Signal type	Other
#1	#A6	Signal -	Sinus voltage. Voltage increases with increasing rpm.
#2	#A30	Signal +	Sinus voltage. Voltage increases with increasing rpm.

Fig 2: Identifying 2-Pin Connector Terminals

Courtesy of VOLVO CARS CORPORATION

CHECK

Prerequisites (unless otherwise specified):

Fig 3: Identifying Voltage Reading

Courtesy of VOLVO CARS CORPORATION

Check 1

Engine rpm sensor:

Measure alternating voltage between #A6 and #A30. The value should be:

U≈ 5 - 16V at idle (650 rpm).

U ≥ 100V at 7000 rpm.

NOTE:

The voltage reaches its highest value immediately after the gap in the flywheel.

NOTE:

The control module interprets that the curve is symmetric. No check of voltage level.

Check 2

Engine rpm sensor:

Measure resistance between #A6 and #A30. The value should be:

125.5Ω ± 17Ω at +20 °C.