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Home >> Chevrolet >> 2002 >> Astro Van Passenger, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 797 (Antilock Brake System) >> Diagnostic Information and Procedures >> DTC C0221 to C0227: Wheel Speed Sensor Circuit >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 3

    Measure the resistance of the wheel speed sensor in order to determine if the sensor has a valid resistance value.

  2. 4

    Ensures that the wheel speed sensor is generating a valid AC voltage output.
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