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1986+ Electronic Speedometer and rear Axle Speed sensor.

posted by  M on  Tue Nov 19 11:45 CST 2002
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last visit: Sat May 1 10:12 CST 2010
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David Hunter is right about the sine wave, the rear axle sensor is a passive coil unit without any 'wave shaping' electronics. The sensor produces 12 pulses (or actually complete periods)/wheel axle turn so you'll have to perform some calculations for ppm figures at given speeds. I suppose someone else should help with that part, my SI unit (metric) figures probably would be nothing but confusing.

Late 240's use a 48 pulse/axle turn setup instead because of the need for increased sensitivity when ABS was introduced. This signal however is fed through a 4:1 divider before entering the speedo which remained unchanged.

/Martin
--
65' 121, 73' 165






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New 1986+ Electronic Speedometer and rear Axle Speed sensor. [200][1986]
posted by  someone claiming to be Antiriad  on Tue Nov 19 06:18 CST 2002 >


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