| All values measured to ground unless otherwise noted | |||
| N47-1, N47-2, N47-7 |
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| 1.2 | 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 |
Note 1 |
| 2.17 2.18 |
RF VSS sensor, + input. RF VSS sensor, - input. |
ECM disconnected 0.8-2.3 kOhms across pins 2.17 and 2.18 Sine wave. Frequency varies with wheel speed. |
Note 2 |
| 2.43 2.44 |
LF VSS sensor, - input. LF VSS sensor, + input. |
ECM disconnected 0.8-2.3 kOhms across pins 2.43 and 2.44 Sine wave. Frequency varies with wheel speed. |
Note 2 |
| A2 | |||
| A.1 | VSS signal input, controls loudness depending on vehicle speed | same as N47-1 (N47-2, N47-7) 1.2 | Note 3 Feed from X47 |
| A37 | |||
| A.1 | VSS signal input, controls loudness depending on vehicle speed | same as N47-1 (N47-2, N47-7) 1.2 | Note 3 Feed from X47 |
| Note 1 | Square wave 20 mph / 200 Hz, 35 mph / 330 Hz |
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| Note 2 | 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. | ||
| Note 3 | Substitution test use signal generator set to approx. 3Vpp Loudness will increase when frequency is raised from 0 to 300 Hertz |
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