 | Home > Puma (Tdci) > ABS issue Defender 2.2 Puma |
 
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| andy63 Member Since: 30 Jun 2023 Location: north east Posts: 757  
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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... |
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28th Apr 2025 1:02pm |
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| Toucanspeed Member Since: 28 Nov 2024 Location: South Posts: 12 
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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?
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28th Apr 2025 3:00pm |
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| andy63 Member Since: 30 Jun 2023 Location: north east Posts: 757
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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... |
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28th Apr 2025 3:19pm |
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| Why do we do it Member Since: 16 Mar 2025 Location: Oxfordshire Posts: 14 
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I know this post is a few years old now, but did you get a resolution for your ABS issue as I have a similar problem with my puma 2.4 which I can’t seem to track down all electrics seem good but the pump seems to trigger at very low speeds when you press the brake pedal.
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10th Jun 2025 7:29pm |
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| Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 2394
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The 2.2 and the 2.4 use completely different ABS solutions. The 2.4 is Wabco and the 2.2 is Bosch.
Do a search on Wabco and you will likely find a topic that covers your issue. |
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10th Jun 2025 11:22pm |
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| jbcollier Member Since: 29 Apr 2024 Location: Edmonton AB Posts: 240  
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The sensors are known for being slightly different distances from the reluctor wheel. This leads to differing readings at slow speeds, and, the sensors "starting up" at different speeds. This can give the symptoms above. You need a tool that reads the sensor voltages in real time. You can then have them all up on the screen and quickly tell which one is lagging. On a D2. believe it or not, a tap with a hammer can cure a lagging sensor. The blow knocks it in just a wee bit further, curing the problem.
Please do not just go and start whacking your sensors. Do the diagnostics first! |
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11th Jun 2025 1:11am |
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| andy63 Member Since: 30 Jun 2023 Location: north east Posts: 757
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Ahh i see i posted on this when I was away from home..
I'm home so let me explain.. Ive said before a generic obd reader will only lift abs codes if it has some non generic..ie manufacturer capability.. I don't think you can view any obd code that doesn't start with the first didgit been a one... 0 indicates generic and a 1 manufacturer.. So you do need a reader that has that capability .. The puma network is only 3 modules.. The powertrain ecu, the instrument cluster, and the abs module.. They are networked by can bus.. Plug your tool in and select the abs module.. and basically follow the instructions till you can view the live abs module data or as much of it as your tool can access.. To diagnose your issue that's where you need to start IMHO.. Anything else is just guesswork and you might get lucky.. A little walk through with photos.. Not sure what order they will appear in but here is what i can access with an old scan tool.. and as I'm not driving the wheel sensors are reading 0 kmh  Click image to enlarge Click image to enlarge Click image to enlarge Click image to enlarge Click image to enlarge |
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11th Jun 2025 9:32am |
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| macfrank Member Since: 05 Nov 2015 Location: somewhere in the north Posts: 1121  
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Has anyone noticed this remark? I find this strange in two ways: a) the sensor is mounted on top of the hub, so how should anything drain b) there should be no oil in a 2.2's hub but grease |
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11th Jun 2025 12:01pm |
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| andy63 Member Since: 30 Jun 2023 Location: north east Posts: 757
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Yes.. I wondered about that.. and couldn't make sense of it..👍🤔, but obviously forgot to mention in my reply..
😫 |
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11th Jun 2025 12:06pm |
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| jbcollier Member Since: 29 Apr 2024 Location: Edmonton AB Posts: 240
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The fill plug is pretty high up. If someone thought the fill plug was also the level plug, you could get a lot of oil in there. Which, would then partially drain when you removed the sensor.
Or, you are checking the sensors with the truck inverted... |
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11th Jun 2025 2:01pm |
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| macfrank Member Since: 05 Nov 2015 Location: somewhere in the north Posts: 1121
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"Or, you are checking the sensors with the truck inverted..." I think that's it
"The fill plug is pretty high up." That fill plug is still lower than the sensor. Also the 2.2's hub doesn't have a level plug since they've replaced oil with grease. Even if the hub seal had given in, flooding the hub with axle oil, I don't think there's enough oil in there to get up to the sensor. The diff's fill/level plug is at bit below the centre of the axle. Click image to enlarge |
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11th Jun 2025 2:16pm |
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| jbcollier Member Since: 29 Apr 2024 Location: Edmonton AB Posts: 240
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Dunno when the change occurred but my 2009 2.4 also only has the single, higher placed, fill plug.
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11th Jun 2025 2:31pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8283  
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2.4 wabco to 10my then they are bosch systems.
I had similar issues with mine. Didn't always do it but increased chance of doing it in the wet. Slow speed, under braking abs pump heard running, no indicator symbols. Mine turned out to be resolved by cleaning up rear loom connectors. (After alotnof other sensor seating related checks) Cheers James 110 2010 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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11th Jun 2025 3:05pm |
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