Datatek
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You can test the resistance but the response time of a DVM is too slow to get anything meaningful from the output, you might see the numbers jump around a bit that's all.
P38A P1592 rough road signal implausible
- Thread starter kermit_rr
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Thanks. I get an error on front right but I'm not sure if it's real or caused by something else, either the ecu or modulator.. only ever appears at less than 1mph with foot on the brake, easily repeatable
Datatek
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I would still be looking at the wheel bearing for that, pushing the sensor back so giving a week signal. Are you sure the sensor is pushed in until it touches the reluctor ring.
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It's seized solid, i don't think it's moved a micron in years
Datatek
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Mine were like that, had to chisel one out, then hone the rust out of the steel bush to get the new one in. I would guess that the sensor is not as close to the reluctor ring as it should be, the only option might be a new sensor, not expensive but getting the old one out is a PITA. The only way to confirm that diagnosis is with an oscilloscope.
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I've got a new one ready to go in.. I'm just not convinced as i can drive all day without the abs light coming on so long as i stop and start positively and don't let it creep with my foot still on the brake pedal
Datatek
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The faster the reluctor ring turns, the better the signal. I would bet it's either the sensor or the wheel bearing, either way the sensor would have to come out. But you must do as you wish, I can always be wrong.
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Inductive sensor then.
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I'm not forget at things like this, i assumed, slow would mean a clearer signal
Either way i need to get the old sensor out
Datatek
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I got one of mine out after soaking it overnight with penetrating oil followed by a destructive process of twisting with pliers. The other one would not budge and had to be chiselled out bit by bit.I'm not forget at things like this, i assumed, slow would mean a clearer signal
Either way i need to get the old sensor out
tomcat59alan
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I think it was @Flossie posted some photos during his hub rebuild not so long ago,one showed the cover and the modification I recommended.
Flossie
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Can't find an ' after' pic just this.
tomcat59alan
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Well done that man.
and me the memory isn't that bad.
Datatek
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Wow, I thought the rust was bad on mine, but that beats it hands down
tomcat59alan
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But you want to see it now, would put us all to shameWow, I thought the rust was bad on mine, but that beats it hands down
Sorry to drag up an ancient thread.
I’m visiting from another place (landroverforums.com) with exactly these symptoms on my ‘04 Discovery2.
Exact same symptoms, down to the code reports on the Nanocom.
Kermit, did you ever get to the bottom of this?
I’m fairly clever, but not to the level of ‘checking my sensors out with an oscilloscope’ clever.
My hubs and sensors are fairly recent, within 18 months. Was chasing the 4 amigos for a while til I bit the bullet and swapped those. Now…. Ding ding ding…. 1 second after rolling to a stop.
I’m going to guess that P38 and 04 Disco are the same systems here. Am I making that up?
I’m visiting from another place (landroverforums.com) with exactly these symptoms on my ‘04 Discovery2.
Exact same symptoms, down to the code reports on the Nanocom.
Kermit, did you ever get to the bottom of this?
I’m fairly clever, but not to the level of ‘checking my sensors out with an oscilloscope’ clever.
My hubs and sensors are fairly recent, within 18 months. Was chasing the 4 amigos for a while til I bit the bullet and swapped those. Now…. Ding ding ding…. 1 second after rolling to a stop.
I’m going to guess that P38 and 04 Disco are the same systems here. Am I making that up?
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Datatek
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No idea about the D4 but certainly the P38 is not the same.
Edit, I'm talking nonsense.
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D2 young man
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It's a while ago now and i don't have the car anymore.. but ..
The rough road signal tells the engine ECU to ignore any engine knock as it might actually be road/wheel knock.
I had a split reluctor ring which meant one of them gaps was slightly bigger than the others, the car sees this as the wheel speed fluctuating.
What engine do you have?
The rough road signal tells the engine ECU to ignore any engine knock as it might actually be road/wheel knock.
I had a split reluctor ring which meant one of them gaps was slightly bigger than the others, the car sees this as the wheel speed fluctuating.
What engine do you have?
Datatek
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Ooops, I read 04 as D4, need to go to spec savers.D2 young man
