Subaru 2002 Impreza Service Manual page 445

COMBINATION METER
Instrumentation/Driver Info
D: VEHICLE SPEED SENSOR
The vehicle speed sensor uses a Hall IC pick-up to generate speed signals. (MT model)
This sensor is installed on the transmission case and detects rotating speed of the transmission
output gear.
The sensor generates 4 pulses per rotation of the speed sensor driven shaft and send them to the
speedometer.
1. CONSTRUCTION
The speed sensor mainly consists of
a
Hall IC, magnet ring, driven shaft and spring.
NF0267
(1) Upper case
(2) O-ring
(3) Magnet ring
(4) Driven key
(5) Lowercase
(6) Driven
shaft
(7) Rivet
(8) Hall IC
IDI-8