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The Car Care Guide

The Electronic Control Unit (ECU)

The ECU processes all ABS information and signal functions. It receives and interprets voltage pulses generated by the sensor pickup as the exciter teeth pass by, and uses this information to determine:

  • Impending wheel lock-up and
  • When/how to activate the ABS modulator valves.
  • The ECU connects to the following ABS components: wheel speed sensors, ABS modulator valves, power source, ground, warning lamps, blink code switch.
    Note:
    The ECU also makes self-diagnostic checks during normal operation.