ppetienne

Hi, Do you have any idea to go ahead ? Many thanks

Hi, Thanks a lot for what you did !! So, first, with or without moving the steering wheel at startup I have any difference, only once, the issue didn't occured when moving it a lot but I tried this trick again but without success .. For the current peak, for me this doesn't seem directly to be the root cause as when the issue ocurs there is no current peak. But maybe this is showing a PAS issue ... I have the Koyo model (sesgo attached), what is yours ?

Hi, After searching a while on the forum, I could find that : So, the channel 1 - value 1 represents the voltage value of the terminal 30 and the channel 4 - value 4 represents the voltage value of the terminal 15. Now, I don't well understand why those values are different and with a delay between them ? I could see on others tests that sometimes, the terminal 15 is delayed regarding the terminal 30 and sometimes, it's the opposite ...

Hi, I made again the parasitic current measure waiting at least 45 min after having locked the car and I got 0,06A but honestly I don't trust so much my multimeter. On ohter part, I could retrieve data from the PAS module with the ODBeleven module: When the PAS is well turned on: When PAS is dectecing voltage issue: The Value 4 of the channel 4 is the voltage read by the PAS ? It seems that when that value is low, the PAS is not turning on.

Actually, I made a test without the PAS pump connected and I got the same voltage drop ...

Hi, I could connect a VAG module (ODBeleven) and I got the follwing error: 00566 - Steering assistance operation - Implausible signal And here is the information provided on the wiki for that fault code 00566 - Ross-Tech Wiki. Unfortunalely, with that module, I couldn't perferm a measuring blocks in module 44 but I could perform a monitor of the ODB voltage and here is the graph when starting the engine: I also performed a test by desconnecting all the fuses on the battery fuse box except the 2nd one ("Interior" fuse) to check if a main module was not consuming a lot of energy at startup but the result was the same, the voltage slew down to 9V ... So, I suppose that it's the starter motor that is creating that voltage drop, could be this the root cause of the PAS issue ? Edit: I made the parasite current measure and I got 0,17A, I don't know if I waited enough time after having closen the car because that value seems quite high regarding your previous comment ...

Yes, it is what I tought but if indeed it is what happens, for me the pair of wires of the PAS are good because there is any problem after a delay, so they are well providing the good voltage, am I wrong ?

I don't have a good multimeter for that measure, I will try to find a better one. In the meanwhile, I found another way to "fix" the problem, before starting the engine, I remove the fuse n°7 in the fusebox ("Engine electronics, power-assisted steering" label name), next, I start the engine and the power steerig warning light is on that is normal without the fuse and finally I put back the fuse n°7 and everything is ok. So, I don't know if there is something to check around that fuse ?

Hi, I cleaned again this fuse and also made a test by bypassing it and connecting the PAS positive wire directly on the main positive power supply bar but anything better. I also cleaned the positive connector of the alternator but also without any improvement Do you have any other idea ?

Also, I didn't mentionned it but the error code is indicating that the signal of the terminal 30 is implausible.

I mean the steering sensor

Hi, I didn't do anything else yet but I was wondering if the error code that I have could indeed be lead by a sensor issue ?

Hi, I cleaned the fuse no. 3 and also cleaned the ground cable of the PAS modulenext to its fluid reservoir cap but nothing better I never mentioned it before as I thought that it was not so relevent, but once, I could fix the problem by moving the car wheel on the left/right when turning on the engine but it worked one, next this trick had no effect. This car is from 2003.

As first attempt, I cleaned the easiest connections including the short main earth connection but nothing better ... I was thinking about the error code that has been raised indicating that there was a problem on the terminal 30, do you kown what it means ?

Hi guys, I cleaned up both ends of this ground cable (not so easy without removing the battery). At first, I got again the problem at startup, next I plugged the battery booster, the engine started well (as usual with that booster) and next without the booster, I didn't have anymore the problem. I drove a while and turning on/off the engine without problems (to ensure the problem is not present anymore) but after like 5 restarts, the problem came on again ... So, it seems that the cleaning had a good effect for a while but not permanently. How is it possible to ensure that the cleaning is good ? I could measure the impedance of that cable but the value is quite low (below 1 ohm) and I'm not sure if the value would be reliable ..

Hi, Yes you're right, Indeed I supposed that the battery and the charge circuit were good as a professional guy checked that after changing the battery and told me that everything was fine on that side. Anyway, here are the measures: Without key in the ingnition barrel: 12.7V With key in the ignition barrel, ready to start: 12.6V With car on: 14.4V Next, I also made the same measures with the battery booster connected in parallel to the battery: Without key in the ingnition barrel: 14.5V With key in the ignition barrel, ready to start: 14.3V With car on: 14.4V With the last measures, it should raise that when having an higher voltage when igniting the motor, the PAS is well started but I still don't understand why that booster is needed ...

Hi, Thanks @Wino, I will perform the measure as soon as possible. In the meanwhile, I can "fix" the problem by connecting a battery booster (that one BuTure Booster Batterie - 800A 12800mAh Portable Jump Starter (Jusqu’à 6.0L Essence/5.0L Gazole) Démarrage de Voiture avec Pinces de sûreté intelligentes, Sorties QuickCharge 3.0, Lampe à LED (800A): Amazon.fr: Auto et Moto). With that one connected, the power steering is always good when turning on the engine. So it seems to be related to a lake of power when the PAS is trying to turn on at startup... Note that the new battery is a compatible one with my car (70Ah and 640A). On other part, I could connect a VAG code reader and I could find the code 0236 with a text message like "Central command of power steering assistant, terminal 30" on the ECU of the PAS. Any idea of the reason why of that behavior ? I was attempted to put a more powerfull battery to check if it was better but anyway, it seems that something is wrong somewhere because the battery is compatible and good. Many thanks for your support !!

Hi, thanks for the suggest. Here are the result of the measures: With the car off without the contact (no key): 0,1A With the car off with the contact (key ready to start the engine): 2,1A I don't know if the values are high or no ?

Hello all, I have a Skoda Fabia 6Y2 1.9 TDI and I'm having an issue at power steering level. Indeed, few weeks ago, after starting the engine, the power steering warning light turned on and the steering was quite hard. After restarting the motor, the light turned off and the steering was ok. Next, randomly the previous issue was ocurring when starting the engine but not everytime. One day, the battery was fully unloaded so I though that the battery was the root cause, for that, changed it by a new one of 70Ah-640A and during one day, I got any steering issues (I restarted at least 10 times the car without any probleme). 2 days after, without modifying and testing nothing on the car (as I thought that the issue was solved by changing the battery), the issue came on again and now the problem is present everytime, not anymore a random issue, a permanent one. For what I could see, it really seems to be an electrical issue, as the fact that changing the battery solve temporarly the problem and also because it was a random issue at first and when everything was fine, the steering was pretty light and easy to use. So, I checked/did the following points: Changed the battery Cleaned the ground cable connected to the battery Checked the fuse of the power steering is ok Checked that the battery warning light is well turned on when the engine is not running (seen on the forum that could be a wire issue at alternator level if the light is always off) Checked the battery voltage Unplugged/plugged the 3 connectors of the PAS Checked the continuity of the 2 wires of the power connector of the PAS Refilled the oil tank of the power steering (it was a bit low) Connected an ODB2 wifi scanner with the engine turned and with the problem but no error code was present (I don't know if it's normal but only one ECU was detected) Disconnecting the battery for 15 min Additional information: The power steering warning light is never lighted on when the motor is not running The engine is turned on quite easily before and after changing the battery (any sign of battery weakness) I hope that someone could help me to find the root cause because for what I saw on this forum, many reasons could lead to that kind of behavior. Many thanks in advance for your support ! Pierre