ABS headache

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mr moo
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Re: ABS headache

Post by mr moo » Thu Jan 12, 2023 11:37 am

Ok, attempting to upload a video didn't work, so I'll ask micron again.
I have taken the cover off the main abs relay, turned the ignition on and put a piece of paper in-between the failsafe contacts of the relay after it does it's 5 clicks.
This enables the dash abs light to flash on and off with a bridge across TBS and GND on the diagnostic socket and it's clearer to read the abs codes... But I'm lost here, plenty of possibles but it's raining and my brain hurts... Any help if someone has an idea what's going on would be lovely

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Re: ABS headache

Post by Micron » Thu Jan 12, 2023 12:19 pm

Neil,
Can you get a picture of the relay and I will have a look to see if I have one.
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mr moo
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Re: ABS headache

Post by mr moo » Thu Jan 12, 2023 12:26 pm

Here it is, if it uploads
Image

Image

Image

Image
The last image shows connected to the car but it is under the fusebox and the cables are closest to the engine. I did it like this so I didn't have to keep removing the fusebox

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Re: ABS headache

Post by mr moo » Fri Jan 13, 2023 1:17 pm

Ok now I'm going through the wiring with a fine tooth comb (and a multimeter) and found my rear left abs sensor has infinite resistance and shows 0.5 ish volts. So I think it's buggered... Still going through it
Quick question, is there a way of fooling the abs into not seeing the fault with that sensor?

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Re: ABS headache

Post by mr moo » Fri Jan 13, 2023 1:42 pm

Woohoo! :D I put a 1.5k ohm resistor across the passenger side rear abs sensor outputs on the abs module, turned on and no light on the dash!!!

Who'd have thought all that brain f&#k and dodgy codes would have been caused by a moody sensor...

Just on the lookout for a left rear sensor that will do the job so if anyone has anything that fits, yes please!

Neil

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Re: ABS headache

Post by Micron » Fri Jan 13, 2023 6:36 pm

Well done Neil
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mr moo
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Re: ABS headache

Post by mr moo » Fri Jan 13, 2023 7:14 pm

Thanks Trev, that'll save you a trip to your garage!

I need to work out where I'm going to find a suitable sensor... I can't help but think a Mazda type one might be able to modify

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Re: ABS headache

Post by Micron » Fri Jan 13, 2023 7:19 pm

mr moo wrote:
Fri Jan 13, 2023 7:14 pm
Thanks Trev, that'll save you a trip to your garage!

I need to work out where I'm going to find a suitable sensor... I can't help but think a Mazda type one might be able to modify
There is a rear one on eBay but it’s a RH one, maybe you can changes the brackets over

https://www.ebay.co.uk/itm/202848724085 ... media=COPY
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Re: ABS headache

Post by mr moo » Fri Jan 13, 2023 8:05 pm

I Think I need to get mine off the car so I've got a visual comparison, but if you know if that one is suitable.
Thanks

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Re: ABS headache

Post by Micron » Fri Jan 13, 2023 8:07 pm

mr moo wrote:
Fri Jan 13, 2023 8:05 pm
I Think I need to get mine off the car so I've got a visual comparison, but if you know if that one is suitable.
Thanks
You will need to double check, it’s just on on my watch list
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