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Discussion Starter #1
Good evening all. So I've had the 307 (2005 1.6 hdi) for 2 years now, and apart from a few dpf issues it's been mainly all good.
However, I've got a niggling issue with the PAS, for the last 10 months it's had a habit of cutting out willy nilly, normally after 10 minutes or so of driving, sometimes comes back after a while, sometimes kind of half works.
Plugged the lappy in and planet returns 2 faults, first is steering angle sensor S1 short circuit to positive or short circuit to earth. Which I'm assuming the sensor is toast as the live parameters say it's angled right most/all of the time.
Second fault shown is 'intermittent fault, control unit'
Which when the steering does its cutting out thing, Planet loses comunication with the steering ecu.
This last week, the steering only starts to work once the vehicle has moved for the first time after starting the engine, if that makes sense. In actual fact, I also found that with the key on 2nd click without the engine running, if I roll it forward a little, the electric steering pump starts running, even though the engine isn't!
I've checked earth's etc... checked the MF8 fuse under bonnet which seemed to have loads of atf type oil on it?
Anyone had any experience with this?
Is the steering angle sensor replaceable on its own or is it whole comm2000 job?
And where is the steering ecu? On the pump I assume? Sorry for the headache of the long post again. Thanks in advance, Ryan
 

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Good evening all. So I've had the 307 (2005 1.6 hdi) for 2 years now, and apart from a few dpf issues it's been mainly all good.
However, I've got a niggling issue with the PAS, for the last 10 months it's had a habit of cutting out willy nilly, normally after 10 minutes or so of driving, sometimes comes back after a while, sometimes kind of half works.
Plugged the lappy in and planet returns 2 faults, first is steering angle sensor S1 short circuit to positive or short circuit to earth. Which I'm assuming the sensor is toast as the live parameters say it's angled right most/all of the time.
Second fault shown is 'intermittent fault, control unit'
Which when the steering does its cutting out thing, Planet loses comunication with the steering ecu.
This last week, the steering only starts to work once the vehicle has moved for the first time after starting the engine, if that makes sense. In actual fact, I also found that with the key on 2nd click without the engine running, if I roll it forward a little, the electric steering pump starts running, even though the engine isn't!
I've checked earth's etc... checked the MF8 fuse under bonnet which seemed to have loads of atf type oil on it?
Anyone had any experience with this?
Is the steering angle sensor replaceable on its own or is it whole comm2000 job?
And where is the steering ecu? On the pump I assume? Sorry for the headache of the long post again. Thanks in advance, Ryan
Without having it apart I couldn't tell you. Someone else might though. Also there are people on eBay that apparently specialise in fixing com2000 units. I myself wouldn't trust but its an avenue to explore if you like. As for the steering ECU. I would think it's likely part of the BSI but again not sure.
 

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If you have a steering angle sensor then the com unit needs to be from a car with steering angle sensor they dont all have it BUT i recon your real issue is far simpler i recon you just have a bad connection somewhere in the wiring.

The steering ecu is indeed part of the pump and it is where i would start look at the plug for signs of corrosion or water ingress

The steering working when you roll without the engine running is normal the engine does not need to run for the steering to work it just needs power and the signal from speed sensor to tell it it is moving.
 

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Discussion Starter #4
I've pulled both the plugs on the pump this evening, which unfortunately both looked good, albeit again coated in oil on the inside. Is this something that's normal to prevent corrosion?
One other thing I noticed while I had it on planet the other day, that when looking in the steering parameters it still said engine 'off' even though it was running. I wonder if that is linked to the steering not working when first started until the car moves?
 

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I've pulled both the plugs on the pump this evening, which unfortunately both looked good, albeit again coated in oil on the inside. Is this something that's normal to prevent corrosion?
One other thing I noticed while I had it on planet the other day, that when looking in the steering parameters it still said engine 'off' even though it was running. I wonder if that is linked to the steering not working when first started until the car moves?
No there shouldn't be oil in any of the electrical connectors. This may be whats causing thee issue. Try and find the source of the oil ingress and fix that to prevent this in the future. Get some electrical contact cleaner and clean the connectors. The control unit is in the pump according to reliable, if the connectors are full of oil and not passing current you will have the issues your having.
 

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Discussion Starter #6
Well that's kind of what I was thinking, the only thing it could have got there is that someone has put it there to prevent corrosion! (Like grease on battery terminals just you shouldn't use grease but vasoline instead) for it to be on the terminals of the pump you could say maybe from leakage (it don't leak btw) but it was on the main fuse 70A in the fuse box as well? There's no way it's founder its own way up there!
 

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Well that's kind of what I was thinking, the only thing it could have got there is that someone has put it there to prevent corrosion! (Like grease on battery terminals just you shouldn't use grease but vasoline instead) for it to be on the terminals of the pump you could say maybe from leakage (it don't leak btw) but it was on the main fuse 70A in the fuse box as well? There's no way it's founder its own way up there!
I would check all your connectors and clean them with electrical contact cleaner. if your worried about corrosion there are other things you can do
 

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Discussion Starter #8
So the oil is in the 'power supply' plug on the pump, and it's also at the other end of the power supply in the main fuse box. My brother who's a WV technician reckons it's leaked out the steering pump and wicked all the way back up the loom to the main fuses. I've cleaned the oil out the plugs with contact cleaner, but he reckons the pump ecu will be toast also
 
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