Honda City ABS error - wicked problem

**mina_nuka** · October 30th, 2018 09:35 AM

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** · November 1st, 2018 02:56 AM

Originally Posted by 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.

Haha. Thanks sir! Will try ko DIY clean.

Sent from my iPhone using Tapatalk

**oj88** · November 1st, 2018 10:00 AM

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** · November 1st, 2018 10:45 AM

Originally Posted by 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.

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** · November 1st, 2018 11:15 AM

Originally Posted by mina_nuka

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** · November 1st, 2018 11:22 AM

Originally Posted by oj88

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** · November 1st, 2018 11:26 AM

Originally Posted by mina_nuka

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.

**mina_nuka** · November 1st, 2018 11:33 AM

Originally Posted by oj88

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.

That's clarification.

Not to make you take your hypertension pills.

**oj88** · November 1st, 2018 12:16 PM

No, I'm calm as calm can be. Posted texts doesn't do justice to the actual expressed human emotion.

It just so happen that when talking about the intricate workings of motor vehicles, you're in my wheelhouse.