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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 643 (Anti-Lock Brake System) >> Diagnostic Information & Procedures >> DTC C0229: Drop Out of Front Wheel Speed Signals >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

As the wheel spins, the wheel sensor produces an AC signal. The EBCM uses the frequency of the AC signal to calculate the wheel speed.