1021
1. Using feeler gauges, measure the air gap between the wheel speed sensor and the
pulser ring.
1. ABS sensor (front sensor shown)
2. Shim
3. Pulser ring
4. Fixing
2. Rotate the wheel and repeat the measurement in several places to make sure that the
pulser ring is not distorted or bent. Renew a damaged pulser ring.
3. Adjust the air gap using the correct shim to achieve an air gap between 0.37 mm and
1.23 mm.
4. Shims are available in the following sizes:
• shims - 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm and 2.5 mm.
5. If necessary, remove the wheel speed sensor, fit the correct thickness shim and refit
the wheel speed sensor and tighten the original fixing to 9 Nm.
6. Repeat the air gap measurement. Readjust as necessary.
7. When the air gap measurement is between 0.37 mm and 1.23 mm, remove the
original fixing, fit a new fixing and tighten to 9 Nm.
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