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- 19,281
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- Buckinghamshire, UK. ('95 DT)
From memory it has a plug somewhere near the brake flexi-hose. Pretty sure I recall something around there.
P38A Tips for removing front ABS sensors
- Thread starter awkwardbob
- Start date
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From memory it has a plug somewhere near the brake flexi-hose. Pretty sure I recall something around there.
awkwardbob
Well-Known Member
- Posts
- 578
- Location
- Glasgow
Ok so I found the connector, just under the battery.
the sensor measures 1Kohms but I couldn’t find a voltage on the other side of the connector at all.
that said, the wabco unit detected when the sensor was disconnected.
Ive popped it all back together again and now the fault massage is that normal
Rotation detected but right front sensor intermittently open circuit -likely
Because I’ve been trying to shift the bugger.
anyone have any thoughts ?
I’ll change the other side discs and pads to avoid the imbalance and any TC errors as a matter of course and carry on.
I think I May leave the sensor in that side well alone !
the sensor measures 1Kohms but I couldn’t find a voltage on the other side of the connector at all.
that said, the wabco unit detected when the sensor was disconnected.
Ive popped it all back together again and now the fault massage is that normal
Rotation detected but right front sensor intermittently open circuit -likely
Because I’ve been trying to shift the bugger.
anyone have any thoughts ?
I’ll change the other side discs and pads to avoid the imbalance and any TC errors as a matter of course and carry on.
I think I May leave the sensor in that side well alone !
- Posts
- 19,281
- Location
- Buckinghamshire, UK. ('95 DT)
Can you check continuity with a test light and wiggle the wire in case it has an internal break? I cannot remember what the resistance should be but a kilaohm sounds high.
- Posts
- 12,601
- Location
- Sud ouest France !
Around 800-900ohms if I remember correctly and it should fluctuate as you turn the relevant wheel.. 
awkwardbob
Well-Known Member
- Posts
- 578
- Location
- Glasgow
So 975 ohms Isn’t too bad then
Just finishing off the NS brakes (seized caliper slider pin) and I’ll
Give it a wee test.
mum worried now I’ll
Have damaged the sensor with my ham-fisted attempts to
Shift it !
Just finishing off the NS brakes (seized caliper slider pin) and I’ll
Give it a wee test.
mum worried now I’ll
Have damaged the sensor with my ham-fisted attempts to
Shift it !
- Posts
- 12,601
- Location
- Sud ouest France !
Did you check the resistance while turning the wheel?So 975 ohms Isn’t too bad then
Just finishing off the NS brakes (seized caliper slider pin) and I’ll
Give it a wee test.
mum worried now I’ll
Have damaged the sensor with my ham-fisted attempts to
Shift it !
awkwardbob
Well-Known Member
- Posts
- 578
- Location
- Glasgow
Did you check the resistance while turning the wheel?
ok, so, embarrassing question.
I jacked up the corner, put her in neutral took the handbrake off but I couldn’t freely rotate the wheel, only a quarter turn or so.
obviously I’m doing something stupid and missing something simple here...
I do have 3/4 sensors working now though !
dubbleRR
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- 1,018
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- highlands of Scotland
tomcat59alan
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- 18,611
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- wirral and triquivijate
I'm jumping in here without reading all the posts but that sounds normal show's your viscous coupling is working.
dubbleRR
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- 1,018
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- highlands of Scotland
Yea thats the test for the vc with a bit more force
But to check abs sensor pulses you need two wheels off the ground ,Or take off the front shaft off then wheels will spin individual ,easer to just lift two wheels .
That's perfectly normal. Lift the other wheel up on the same axle otherwise you're fighting the viscous coupling.
awkwardbob
Well-Known Member
- Posts
- 578
- Location
- Glasgow
Thanks Folks,
I did actually wonder about something like that (honestly I did !)
will try both wheels when I get a chance.
need to locate where the pesky NSF beastie connects (the OSF was right under the fuse box)
thanks again
Bob
I did actually wonder about something like that (honestly I did !)
will try both wheels when I get a chance.
need to locate where the pesky NSF beastie connects (the OSF was right under the fuse box)
thanks again
Bob
tomcat59alan
Well-Known Member
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- 18,611
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- wirral and triquivijate
May be under the air filter box, it's been a while since I did mine.
dubbleRR
Well-Known Member
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- 1,018
- Location
- highlands of Scotland
A thing that mine does ,is if i jack up both front and put on ignition ,but not started ...... i spin one wheel and the abs nocks on and off on that axel as both wheels spin in opposite directions .But it don't do it on the back ...strange anyway try that see if yours the same .might tell if the fronts working , ..oh i think there should be 1.5 ..1.7 ohms resistance open circuit its duff...
anyway try that see if yours the same .might tell if the fronts working , ..oh i think there should be 1.5 ..1.7 ohms resistance open circuit its duff...
brianp38dse
Well-Known Member
- Posts
- 20,010
- Location
- heathrow
It's on top of the inner wing just behind that air filter next to the brake flexible conector
