All values measured to ground unless otherwise noted
Conn./Plug/Pin Pin Information Test Value Comments
N30/1 Up to MY 94    
42
43
Right rear axle VSS sensor, - input.
Right rear axle VSS sensor, + input.
ECM disconnected
0.6-3.2 kOhms across pins 42 and 43
Sine wave. Frequency varies with wheel speed.
Note 1
44
45
Left rear axle VSS sensor, - input.
Left rear axle VSS sensor, + input.
ECM disconnected
0.6-3.2 kOhms across pins 44 and 45
Sine wave. Frequency varies with wheel speed.
Note 1
2 Left rear axle VSS output, generated by L6/3, processed in ECM and sent to other ECMs Ignition on, lift rear of vehicle.
Turn any rear wheel > 1 rev/sec by hand > 3 VAC or with vehicle moving
20 mph / 200 Hz
35 mph / 330 Hz
square wave
N47-1,
N47-2
As of MY 95    
1.13
1.12
Left rear axle VSS sensor, + input.
Left rear axle VSS sensor, - input.
ECM disconnected
0.6-1.8 kOhms across pins 1.12 and 1.13
Sine wave. Frequency varies with wheel speed.
Note 1
1.15
1.14
Right rear axle VSS sensor, + input.
Right rear axle VSS sensor, - input.
ECM disconnected
0.6-1.8 kOhms across pins 1.14 and 1.15
Sine wave. Frequency varies with wheel speed.
Note 1
1.18
(As of MY 95)
Left rear axle VSS output, generated by L6/3, processed in ECM and sent to other ECMs Ignition on, lift rear of vehicle.
Turn any rear wheel > 1 rev/sec by hand > 3 VAC or with vehicle moving
20 mph / 200 Hz
35 mph / 330 Hz
square wave
1.3
(As of MY 96)
Left rear axle VSS output, generated by L6/3, processed in ECM and sent to other ECMs Ignition on, lift rear of vehicle.
Turn any rear wheel > 1 rev/sec by hand > 3 VAC or with vehicle moving
20 mph / 200 Hz
35 mph / 330 Hz
square wave
N3/4      
1.8 Rear axle VSS signal input, controls HFM-SFI system function depending on vehicle speed   Feed from traction
system via X62/13
N4/2      
11 Rear axle VSS signal input, controls CCsystem function depending on vehicle speed same as N3/4 Pin1.8 Feed from traction
system via X62/13
N4/3      
9 Rear axle VSS signal input, controls CC/ISC system function depending on vehicle speed same as N3/4 Pin1.8 Feed from traction
system via X62/13
N30/2      
1 Rear axle VSS signal input, controls ASD function depending on vehicle speed same as N3/4 Pin1.8 Feed from traction
system via X62/13
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.