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What is the function of the Electronic control unit in Anti-lock braking system?

What is the function of the Electronic control unit in Anti-lock braking system? Correct Answer Monitoring the speed of the wheel

The electronic control unit constantly monitors the rotational speed of each wheel. If it detects a wheel rotating significantly slower than the other wheels then that condition indicates of impending wheel locks. The other options mentioned ate the functions of an antilock brake system but not particularly the function of ECU.

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