Honda City ABS error - wicked problem

[mina_nuka]

On possible debris on the magnetic tip, is this something that can be cleaned?




Yes, with an OEM toothbrush on the reluctor wheel teeth and special paper towel dampened in mineral oil to wipe the sensor tip.












Just kidding on the OEM and special.

[frost2]

On possible debris on the magnetic tip, is this something that can be cleaned?




Yes, with an OEM toothbrush on the reluctor wheel teeth and special paper towel dampened in mineral oil to wipe the sensor tip.












Just kidding on the OEM and special.

Haha. Thanks sir! Will try ko DIY clean.


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[oj88]

It could also mean that the sensor is not picking up all the teeth on the hub. So instead of a continuous steam of one and zeroes, it's skipping some of the teeth and the ABS computer interprets it as a slow-moving wheel or it having a different-sized (larger) wheel.

Check if the sensor distance has changed.

[mina_nuka]

It could also mean that the sensor is not picking up all the teeth on the hub. So instead of a continuous steam of one and zeroes, it's skipping some of the teeth and the ABS computer interprets it as a slow-moving wheel or it having a different-sized (larger) wheel.

Check if the sensor distance has changed.

The wheel speed sensors do not send 1s and 0s. The signals are analog AC not digital signals. If you watch the waveform on an oscilloscope, the pattern is not square waveform

[oj88]

The wheel speed sensors do not send 1s and 0s. The signals are analog AC not digital signals. If you watch the waveform on an oscilloscope, the pattern is not square waveform

That's nit-picking. They may be analog at the sensor input but they are converted to and processed as digital signals (PWM), in-computer. The ABS computer only cares about counting the number of peaks per unit of time to determine the wheel speed. If one wheel is perceived to be slower than the others (ie. The sensor is not detecting all of the teeth), the computer might mistaken it having a larger-diameter wheel (ie. turning slower than the others).

[mina_nuka]

That's nit-picking. They may be analog at the sensor input but they are converted to and processed as digital signals (PWM), in-computer. The ABS computer only cares about counting the number of peaks per unit of time to determine the wheel speed. If one wheel is perceived to be slower than the others (ie. The sensor is not detecting all of the teeth), the computer might mistaken it having a larger-diameter wheel (ie. turning slower than the others).

Clarifying not nit-picking.



Not to make things more confusing to those who doesn't know.

[oj88]

Clarifying not nit-picking.



Not to make things more confusing to those who doesn't know.

I understand. But in all intents and purposes, the input may be electrically analog, but the information being collected is digital.... that's what I meant.