At a loss and a bit desperate now ...

ceedy · 8th August 2021, 10:59

After the front wing liner wrenched and damaged the ABS wiring , I've drilled out and replaced the sensor yesterday in between showers and that got the ABS light went out .

Now today unplugged the abs cable , reffitted the liner and with now gn on and the ABS lights back on again

!! .. unplugged a few times and no change ..

What test can i do to find where the problem is thinking the damage might be in the wiring above the blue connector into the harness ?

Cable feels ok and no visible damage.

Is there anyway to plug something in place of the sensor to see if the light will go out ? and prove the point .

where does the abs wire go after it disappears into that massive harness ? , doe it just go straight across the harness and out up into the underbonnet area ? or off into the wiring depths ?

here's hopein ' someone might have a clue

Chris

vitesse · 8th August 2021, 12:49

In some cases you actually need to drive it in order for it to reset. A short 100 yds up the road should be enough.

Regards

Arctic · 8th August 2021, 14:19

[QUOTE]

Quote:

Originally Posted by vitesse

In some cases you actually need to drive it in order for it to reset. A short 100 yds up the road should be enough.

Regards[/QUOT

E]

Follow Mike's advice and all should be ok, if not then something else is amiss and will need investigation.

ceedy · 8th August 2021, 16:23

Checked the new sensor with my meter on AC, spinning the brakes shows no output

Reconnect and the light goes out, so it's passing the initial system test.
All seems to work but on occasions at walking pace I can get the pedal buzz ?

C

Mike Noc · 8th August 2021, 18:27

Switch your meter to DC and try again. The voltage should change between 0.7v and 1.7v as the magnetic segments are detected in the reluctor ring.

ceedy · 9th August 2021, 07:49

Had to get it all back togeether for work today ..

So at the moment .. the issues are

1 ..ABS activating at walking pace or slower ..

2 ..and today, it seems the Cruise control seems to be not quite right ?

Does the LH sensor get used by cruise ?

ta

Chris

roverbarmy · 9th August 2021, 14:18

Did you clean any rust off under the sensor before refitting? Any rust will alter the gap between the sensor and the segments.

Sent from my SM-G903F using Tapatalk

ceedy · 9th August 2021, 16:25

All super clean in and around the hole, seems it's just not producing a strong enough signal at 3mph ish
Getting another sensor to prove in a few days

C

Quote:

Originally Posted by roverbarmy

Did you clean any rust off under the sensor before refitting? Any rust will alter the gap between the sensor and the segments.

Sent from my SM-G903F using Tapatalk

Mike Noc · 9th August 2021, 16:55

As I mentioned you should get 48 changes of state for each revolution and end up with something like this:

If any missing segments are random for each revolution then suspect the sensor, and if they are in the same place each revolution then suspect the magnetic reluctor in the bearing.

Mike Noc · 11th August 2021, 11:09

I bought a car with an ABS fault which had two new sensors fitted at the rear and still didn't work. Turned out they were switching but at twice the voltage they should have. Luckily I had a couple of spare good sensors.

Try DMGRS on here for sensors - at least if there is a problem they will replace them.

8th August 2021, 10:59	#1
ceedy This is my second home All Trophy Blue ,ZT260#50 , ZT CDTI Auto, ZR105+ and 1.8T Firefrost spoiling the Set . Join Date: Nov 2006 Location: Nr Sherborne But in Somerset.. Posts: 6,077 Thanks: 916 Thanked 1,214 Times in 768 Posts	At a loss and a bit desperate now ... After the front wing liner wrenched and damaged the ABS wiring , I've drilled out and replaced the sensor yesterday in between showers and that got the ABS light went out . Now today unplugged the abs cable , reffitted the liner and with now gn on and the ABS lights back on again !! .. unplugged a few times and no change .. What test can i do to find where the problem is thinking the damage might be in the wiring above the blue connector into the harness ? Cable feels ok and no visible damage. Is there anyway to plug something in place of the sensor to see if the light will go out ? and prove the point . where does the abs wire go after it disappears into that massive harness ? , doe it just go straight across the harness and out up into the underbonnet area ? or off into the wiring depths ? here's hopein ' someone might have a clue Chris __________________ The Three Bloo's Wifey's Zr105, MY CDTI & 260 #50 and Number One sons 1.8T in Firefrost When I were a lad Zero to 142 in 10.25 secs at the Pod on my Blown Norton. 210 Kart Champ in 70's Last edited by ceedy; 8th August 2021 at 11:04..

8th August 2021, 16:23	#4
ceedy This is my second home All Trophy Blue ,ZT260#50 , ZT CDTI Auto, ZR105+ and 1.8T Firefrost spoiling the Set . Join Date: Nov 2006 Location: Nr Sherborne But in Somerset.. Posts: 6,077 Thanks: 916 Thanked 1,214 Times in 768 Posts	Checked the new sensor with my meter on AC, spinning the brakes shows no output Reconnect and the light goes out, so it's passing the initial system test. All seems to work but on occasions at walking pace I can get the pedal buzz ? C __________________ The Three Bloo's Wifey's Zr105, MY CDTI & 260 #50 and Number One sons 1.8T in Firefrost When I were a lad Zero to 142 in 10.25 secs at the Pod on my Blown Norton. 210 Kart Champ in 70's

9th August 2021, 07:49	#6
ceedy This is my second home All Trophy Blue ,ZT260#50 , ZT CDTI Auto, ZR105+ and 1.8T Firefrost spoiling the Set . Join Date: Nov 2006 Location: Nr Sherborne But in Somerset.. Posts: 6,077 Thanks: 916 Thanked 1,214 Times in 768 Posts	Had to get it all back togeether for work today .. So at the moment .. the issues are 1 ..ABS activating at walking pace or slower .. 2 ..and today, it seems the Cruise control seems to be not quite right ? Does the LH sensor get used by cruise ? ta Chris __________________ The Three Bloo's Wifey's Zr105, MY CDTI & 260 #50 and Number One sons 1.8T in Firefrost When I were a lad Zero to 142 in 10.25 secs at the Pod on my Blown Norton. 210 Kart Champ in 70's

9th August 2021, 14:18	#7
roverbarmy This is my second home Roverless + 1.7D Sportage Join Date: Aug 2014 Location: East Norfolk Posts: 7,050 Thanks: 729 Thanked 2,021 Times in 1,449 Posts	Did you clean any rust off under the sensor before refitting? Any rust will alter the gap between the sensor and the segments. Sent from my SM-G903F using Tapatalk __________________ Oil in my veins!

8th August 2021, 12:49	#2
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,537 Thanks: 395 Thanked 823 Times in 652 Posts	In some cases you actually need to drive it in order for it to reset. A short 100 yds up the road should be enough. Regards

8th August 2021, 18:27	#5
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,553 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Switch your meter to DC and try again. The voltage should change between 0.7v and 1.7v as the magnetic segments are detected in the reluctor ring.

9th August 2021, 16:55	#9
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,553 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	As I mentioned you should get 48 changes of state for each revolution and end up with something like this: If any missing segments are random for each revolution then suspect the sensor, and if they are in the same place each revolution then suspect the magnetic reluctor in the bearing.

11th August 2021, 11:09	#10
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,553 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	I bought a car with an ABS fault which had two new sensors fitted at the rear and still didn't work. Turned out they were switching but at twice the voltage they should have. Luckily I had a couple of spare good sensors. Try DMGRS on here for sensors - at least if there is a problem they will replace them.