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Hall-Effect Sensors (MX-3 & 929)

  1. Remove distributor. Remove circuit opening relay and disconnect 3-pin connector from distributor. This will prevent coil sparking. Turn ignition on.
  2. Using a voltmeter, backprobe White wire (MX-3 1.6L), Violet/Green wire (MX-3 1.8L) or Green/White wire (929) at distributor. Slowly rotate distributor shaft one turn. Voltmeter should pulse 0-5 volts 4 times (4-cylinder) or 6 times (V6).
  3. Backprobe Yellow/Blue (MX-3 1.6L), Violet/White wire (MX-3 1.8L) or Blue wire (929) at distributor. Slowly rotate distributor shaft one turn. Voltmeter should pulse 0-5 volts one time. If either sensor does not work as described, turn ignition off. Disconnect 4-pin or 6-pin connector at distributor.
  4. Turn ignition on. Ensure 5 volts is present at same wires which were checked in steps 2) and 3). If 5 volts not present, check wiring and ECU. If 5 volts present, replace distributor assembly.
CAUTION: While checking the ignitor, disconnect connector from the ignition coil.
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