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Toucanspeed



Member Since: 28 Nov 2024
Location: South
Posts: 12
United Kingdom 2015 Defender 90 Puma 2.2 CSW Indus Silver
ABS issue Defender 2.2 Puma
Occasionally as i slow to a stop from maybe 2-3mph, the ABS pump can be heard running. I dont think any wheel is slipping. There are no lights on the dash, brake fluid is full, everything else appears to work fine. I thought it was the nearside front wheel (because of where the vibration came from - probably just the pump) I took the sensor out and it drained the oil from the hub, is this normal?

Any pointers would be appreciated.
TIA.
Post #1066356 26th Apr 2025 10:37am
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andy63



Member Since: 30 Jun 2023
Location: north east
Posts: 753
United Kingdom 
When you say no faults , do you see any lights flashing on the dash while the pump is operating..I think that would be normal , but again just from memory.. I'm sure I've seen my stability control light flashing when the traction controller kicks in and think I've seen similar when the abs is working..
Can only think that the abs is seeing a wheel signal that is indicating a lock up and actuation..
Could only suggest a check of all the wheel sensors and if you had access to a tool that showed live data for the abs ecu...
Post #1066525 28th Apr 2025 1:02pm
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Toucanspeed



Member Since: 28 Nov 2024
Location: South
Posts: 12
United Kingdom 2015 Defender 90 Puma 2.2 CSW Indus Silver
No warning lights at all. Abs and stability appear to work fine other than the pump running when braking at 2-3 mph occasionally. I’ve measured all the resistance of the sensors and they appear ok. What diagnostic program do I need?
Post #1066537 28th Apr 2025 3:00pm
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andy63



Member Since: 30 Jun 2023
Location: north east
Posts: 753
United Kingdom 
The other factor is the air gap or state of the reluctor ring,( cracked etc ) even though the sensor coil itself appears OK..
This was touched on the other day.. Ian pointed out that the standard obd protocol did give codes for abs, but you have no visible faults logged and I'm suggesting that you need a scan tool that is capable of live data from the abs ecu.. even then I'm not sure what it would actually show..and again I'm not at home to try my tool..
I use a scope usually.. that is capable of looking at the signals generated at the wheel sensors and showing any anomalies that the ecu would react to...
Post #1066539 28th Apr 2025 3:19pm
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