| All values measured to ground unless otherwise noted | |||
| N30 | |||
| 11 | RF VSS output, generated by L6/2, processed in ECM and sent to other ECMs | Ignition on, lift front of vehicle. Turn right front wheel > 1 rev/sec by hand > 3 VAC or with vehicle moving |
20 mph / 200 Hz 35 mph / 330 Hz square wave Feed to N30/2 |
| 21 23 |
RF VSS sensor, - input. RF VSS sensor, + input. |
ECM disconnected 0.8-3.7 kOhms across pins 21 and 23 Sine wave. Frequency varies with wheel speed. |
Note 1 |
| N30/2 | |||
| 3 | RF VSS signal input, controls automatic locking differential function depending on vehicle speed | Feed from N30 | |
| 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. | ||