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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 730 (Anti-Lock Brake System) >> Diagnostic Information and Procedures >> DTC C1221To C1235: Wheel Speed Sensor Circuit Malfunction >> Conditions for Setting the DTC >> C1225 through C1228

C1225 through C1228

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The EBCM detects a rapid variation in the wheel speed The wheel speed changes by 16 km/h or more in 0.01 second The change must occur 3 times with no more than 1.0 second between occurrences.