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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 942 (Anti-Lock Brake System) >> Diagnostic Information and Procedures >> DTC C0221: RF Wheel Speed Sensor Circuit Open; C0222: RF Wheel Speed Signal Missing; C0223: RF Wheel Speed Signal Erratic; C0225: LF Wheel Speed Sensor Circuit Open; C0226: LF Wheel Speed Signal Missing; C0227: LF Wheel Speed Signal Erratic >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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.
Fig 1: DTC C0221-C0227 Table
G01706124Courtesy of GENERAL MOTORS CORP.
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