| All values measured to ground unless otherwise noted | |||
| N3/10 | |||
| E.37 E.38 |
Rpm signal input low side high side |
Engine at idle measure across pin 2.29 and 2.30 > 3VAC |
Feed from L5 |
| C.38 | Rpm signal output for diagnostic purposes | Engine at idle > 3VAC | Feed to X11/4 |
| X11/4 | |||
| 13 | Engine rpm signal input for diagnostic purposes | same as N3/10 Pin C.38 | |
| Note 1 | To test, spin wheel at 1 rev/sec, measure at least 120 mVAC between both wires of sensor. If voltage is OK, measure the sensor's resistance while pulling, twisting and bending the sensor wires, looking for intermittent opens. Finally, check the sensor tip and rotor teeth for dirt or breakage. An oscilloscope can also be used to check the waveform - chipped or dirty teeth show up as missing or malformed waves. | ||