Hall Effect Sending Unit Test - 5000CS Turbo
NOTE:
Ignition coil wire from distributor must always be grounded when checking Hall Effect sending unit.
- Remove protective cover from Hall Effect sending unit (on distributor) and unplug connector from unit. Connect voltmeter to connector terminals No. 1 and 3. Turn ignition on. Voltmeter reading should be 9 volts minimum.
- If reading is incorrect, check for open circuit in wiring to sending unit. If reading is correct, turn ignition off. Install connector cover. Connect voltmeter between terminals No. 1 and 2.
- Plug distributor connector back into Hall Effect sending unit. Turn ignition on. Remove distributor cap, rotor, and dust cover. Turn crankshaft by hand until rotor window clears sending unit. Voltmeter should indicate 4 volts minimum.
- Turn crankshaft until rotor window aligns with sending unit. Voltmeter should indicate 0-.5 volts. Turn ignition off. If readings are correct, check wiring between Hall Effect sending unit and ignition control unit as follows.
- Remove control unit panel located on passenger side footwell. Unplug ignition control unit connector. Using an ohmmeter, check continuity between terminal No. 4 of control unit connector and terminal No. 1 of sending unit connector.
- Check continuity between terminal No. 27 of control unit connector and terminal No. 2 of sending unit connector. Also check continuity between terminal No. 25 of control unit connector and terminal No. 3 of sending unit connector. Ohmmeter reading should be close to zero ohms for all 3 tests.
- If readings are incorrect, check for open circuit in wiring between sending and ignition control units. If readings are correct, replace ignition control unit.