ABS 20 ANTI-LOCK BRAKES Precise alignment and gap (1 mm) between the stator pole and the Toner wheel is vital. The front toner rings are press fitted on the wheel hub. The rear toner rings are press fitted on drive shaft. To obtain correct signal, the specified gap between the end of sensor & the toner ring must be between 0.35 to 1.65 mm for front wheels & 0.275 to 1.275 mm for the rear wheels. (with 0.1 mm max. variation). The distance cannot be adjusted, so if the gap measured is outside the tolerance limits, check the condition of both wheel speed sensors & toner rings. Acceleration Sensor Safari uses an acceleration sensor as an additional reference for vehicle deceleration in order to take care of wrong reference speed generation by the wheel speed sensors, which will register the same speeds when connected to each other in the 4x4, engaged condition & if all the four wheels locked. Fig. 12 Rear wheel speed sensor Fig. 13 Acceleration Sensor
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