Hall Effect Sensor: Testing and Inspection

1. Ensure that the following components are OK,
a. Hall control unit.
b. Ignition coil.
c. Wiring between Hall control unit and ignition coil.
d. Connector pins and sockets on Hall generator, distributor and Hall control unit.
2. Disconnect the harness plugs at the idle stabilizer and connect them together.
3. Disconnect coil wire from center of distributor cap and connect to ground using a jumper wire.
4. Disconnect harness plug from Hall control unit.
5. Connect voltmeter to terminal 6 (+) and terminal 3 (-) of the harness plug.
6. Turn ignition switch ON.
7. Slowly turn engine manually while observing voltmeter.
8. Voltage should be:
0 - .7 VDC when aperture rotor is open to Hall generator
1.8 VDC - battery voltage when aperture rotor is closed to Hall generator,
9. If voltage is not within specification, replace Hall generator.
10. Pull back boot on wiring harness connector to Hall generator at distributor.
11. Connect positive lead of voltmeter to green wire terminal and negative lead to black/white wire terminal, leaving connector connected to distributor.
12. Switch on ignition and observe meter while manually rotating engine.
13. If reading alternates between 0 and 2 volts, Hall generator is satisfactory.
14. If reading does not alternate between 0 and 2 volts, replace Hall generator.
15. If no start condition persists, replace ignition coil.
Note: In isolated cases, malfunctions in Hall system cannot be located using previous procedure and related component tests. If this condition persists, substitute new control unit or Hall generator and retest system.