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Testing the hall sensor 700 1989

posted by  rstarkie on  Fri May 14 04:09 CST 2010
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last visit: Fri Oct 24 10:14 CST 2014
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While I have never had the opportunity to try this method of checking the hall sensor it appears to be quite easy to perform.

To test the hall sensor:

(1) Pull off one spark plug wire and attach directly to coil with spark plug in the end, connect the plug base to a ground.

(2) Disconnect the harness plug from the distributor

(3) Switch ignition "ON"

There are three contacts in the connector. They are arranged in a straight line. With the ignition "ON" one of the connectors (on one end of the row or the other) will show 12v to ground. If you can not get 12v from any of the pins when the ignition is switched "ON" and you do not suspect the wiring at fault between the plug and the ICU then suspect the ICU being the fault.

(4) If you find 12v at one of the pins carefully use a jumper to briefly connect the remaining two pins. Each time you jumper those two pins the plug should spark.

In this test the jumper is replacing the effect of the hall sensor. If you get a strong spark with this test and you were getting no spark out of the coil when cranking the engine the hall sensor is faulty.

Randy






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New 760 - No spark [700][1989]
posted by  gofastica  on Thu May 13 14:28 CST 2010 >


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