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Home >> Ford >> 2006 >> Focus ZX4 SES, Standard >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Vehicle Dynamic Systems >> Diagnosis And Testing >> Anti-Lock Control >> Pinpoint Tests >> Pinpoint Test F: DTC C1233 (LF), C1234 (RF), C1235 (RR), C1236 (LR), Speed Wheel Input Signal Missing >> Normal Operation

Normal Operation

The wheel speed sensors generate a signal that is sent to the anti-lock brake system (ABS) module that is proportional to wheel speed. The ABS module compares the wheel speed inputs from all wheel speed sensors to determine an impending lockup.