Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Wheel Speed Sensor



LH front wheel speed sensor reference voltage supply
PIN FH51-1
Active B+
Inactive B+

LH rear wheel speed sensor reference voltage supply
PIN FH51-5
Active B+
Inactive B+

RH front wheel speed sensor reference voltage supply
PIN FH51-35
Active B+
Inactive B+

RH rear wheel speed sensor reference voltage supply
PIN FH51-38
Active B+
Inactive B+

LH front wheel speed sensor
PIN FH51-2
Active 82 Hz @ 10 mph; 164 Hz @ 20 mph (0.8 - 1.5 V)

LH rear wheel speed sensor
PIN FH51-4
Active 82 Hz @ 10 mph; 164 Hz @ 20 mph (0.8 - 1.5 V)

RH front wheel speed sensor
PIN FH51-34
Active 82 Hz @ 10 mph; 164 Hz @ 20 mph (0.8 - 1.5 V)

RH rear wheel speed sensor
PIN FH51-37
Active 82 Hz @ 10 mph; 164 Hz @ 20 mph (0.8 - 1.5 V)