AD82.61-P-6000-16A | Wheel speed signals, testing electrical system of APS |
| Scope of test | Measuring instrument/ Test connection | Operation/Requirement | Specified value | Possible cause/Remedy | ||
1.0 | Navigation processor (A2/30) Wheel speed signal from traction systems control module (N47) Model 168: rear left and rear right Models 129, 140, 202, 208, 210: front left and front right | | Ignition: ON Raise vehicle Model 168: rear Models 129, 140, 202, 208, 210: front and turn appropriate wheel by hand and read out actual value. The wheel speed signals come from N47 via separate cables (not via CAN). | Wheel speed is shown | Check appropriate HHT actual value in traction systems control module (N47) If actual value there is in order: Cable between N47 and A2/30 A2/30 1.1 Refer also to: DMNL chassis, ind. 9 | ||
1.1 | Wheel speed signal from traction systems control module (N47), measured with oscilloscope Model 168: rear left Models 129, 140, 202, 208, 201: front left Model 168: rear right Models 129, 140, 202, 208, 201: front right |
1 (1.1) 1 (1.1) |
A2/30 A2/30 |
7 (1.7) 20 (1.20) | Coupling 1 disconnected Oscilloscope setting: 12 channel Coupling: AC Offset for all channels: bipolar Time base: 100 ms Amplitude: 10 V/div Raise vehicle Ignition: ON Turn wheel by hand Turn wheel by hand | Square wave signal, whose frequency changes with wheel speed. | Cables N47 Values in order and still no vehicle speed signal actual values available: A2/30 |