Year of Manufacture *: 2001 ( Optional ) Engine Code or CC: 1.9 SDI
Hi All, Power steering warning lamp illuminates, usually but not always. First read (VCDS) gave:- 00816 power steering sensor (G250) 30-10-open or short to plus-intemittent. When read again today gave that code and also:- 01290 Reference voltage; steering assist 29-10 short to ground intermittent. In measuring blocks the pump speed remains constantly at idle (1330 rpm approx) and no angular velocity for the steering angle sensor is shown when the wheel is turned. I had a similar one of these last year. On that I replaced the sensor to no good effect and I found out that the EHPS controllers are quite troublesome, customer could not afford a replacement unit and elected to "put up with it". The sensor is a 3 wire device, NBV, ground and signal. Can anybody tell me what signal I should expect? When I scoped it I got a 375mS positive pulse repeating every 2.75sec on a 1sec/div timebase. When observed at faster timebase I got 100microsecond positive pulses at a repetition rate of 1KHz. This with no steering movement. Sorry but my scope is stand alone so uploading images is difficult. I was expecting a pulse stream when the steering was moved but perhaps I'm being overly simplistic. It is entirely possible that the sensor is an intelligent device and I'm looking at a datastream... or it could just be faulty. Disconnected sensor and fed it from a bench PSU with a pull up resistor on the output and got identical results. Some guidance on what I should expect to see would be useful. Shaun
This won't help you much Shaun, but while the fault is now on this forum - We see a lot of these polo based models sporadically flashing steering warning lights. When read for DTC's there are none logged.
The fluid level is always just below minimum on the ones we have seen - the level rarely gets checked & it does drop in normal use, the diesel is never checked due to having to remove the battery to check the level.
You dont have DTC 17911 logged anywhere do you Shaun? The Alternator DF load signal wires break on these at the front of the gearbox & often log the G250 fault.
I believe these also suffer water ingress / corroded contacts in the multiplug behind the N/S/F fog lamp.
Hi Jon, Thanks for the reply. Just checked the autoscan results and no there is not a 17911 logged anywhere. The vehicle does however have the possibility of a slightly unstable voltage regulator on the alternator, there is a customer complaint of flickering headlights. The other possibility here is that the power steering pump can be felt to keep "kicking" when it is running and I wonder if the controller cannot decide what speed to run the pump at, the resultant current pulses would probably make the lights flicker... The alternator warning light is behaving correctly as far as I remember, although I did not specifically check it. There was some water in the multiplug but no corrosion in either plug or socket. My belief is that the water corrodes the controller internally. Shaun.
on January 25, 2011, 11:28 pm, in reply to "