SAAB WIS ONLINE

INSPECTION

INSPECTION

ABS WHEEL SPEED SENSOR

Check the pole piece of ABS wheel speed sensor for foreign particles or damage. If necessary, clean the pole piece or replace ABS wheel speed sensor.

Measure the ABS wheel speed sensor resistance.

If the resistance is outside standard value, replace the ABS wheel speed sensor with a new one.


Terminal No. Standard
1 and 2

1.25±0.25 kΩ



Note

Check the ABS wheel speed sensor cable for discontinuity. If necessary, replace with a new one.


SENSOR GAP

Measure the distance “A” between ABS wheel speed sensor surface and sensor pole face.


Measure the distance “B” between surface where the front axle housing meets the ABS wheel speed sensor, and the tone wheel.

Note

Measure so that the gauge touches the tone wheel teeth top.



(1)

Axle housing

(2)

Tone wheel



Find the gap between the ABS wheel speed sensor pole face and the surface of the tone wheel teeth by putting the measured values in the formula below and calculating.

ABS wheel speed sensor clearance = B − A

ABS wheel speed sensor standard clearance:

0.3 — 0.8 mm (0.012 — 0.031 in)

Note

If the clearance is out of specification, readjust using spacer (Part No. 32009555).


OUTPUT VOLTAGE

Output voltage can be checked by the following method. Install the resistor and condenser, then rotate the wheel about 2.75 km/h (2 MPH) or equivalent.

Output voltage specification:

0.12 to 1 V (at 20 Hz)

Note

Regarding terminal No., please refer to item 1. ABS WHEEL SPEED SENSOR.



(1)

Oscilloscope

(2)

Terminal