Checking Speed Sensors

INSPECTION
1. SPEED SENSOR
1) Check pole piece of speed sensor for foreign particles or damage. If necessary, clean pole piece or replace speed sensor.





2) Measure resistance between speed sensor terminals.








a. If resistance is outside the standard value, replace wheel speed sensor with new one or adjust sensor gap between speed sensor and tone wheel.
b. Check speed sensor cable for discontinuity. If necessary, replace with a new one.

2. TONE WHEEL
1) Check tone wheel's teeth (44 pieces) for cracks or dents. If necessary, replace tone wheel with a new one, 2) Clearances (sensor gaps) should be measured one by one to ensure tone wheel and speed sensor are installed correctly.


Speed sensor clearance:
Front 1.0 - 1.5 mm (0.039 - 0.059 in)
Rear 0.8 - 1.3 mm (0.031 - 0.051 in)





a. If clearance is narrow, adjust by using spacer (P/# 26755AA000)
b. If clearance is wide, check the outputted voltage then replace speed sensor or tone wheel if the outputted voltage is outside the specification.

3. OUTPUT VOLTAGE





1) Output voltage can be checked by the following method. Install resistor and condenser as follows, then rotate wheel about 2.75 km/h (1.7 MPH) or equivalent.