Polo 9N - 00778 Steering angle sensor no comms

[harlie]

Hello and ....help please,

I have just purchased a 2008 Polo tdi manual from auction for one of our kids. Runs, drives, stops - everything seems fine, BUT the orange steering light is on.

Address 44: Steering Assist Labels: 6Q0-423-156.clb
Part No: 6R0 423 156 B
Component: LenkhilfeTRW V277
Coding: 11230
Shop #: WSC 31414
VCID: 2F6D1EFEED041DEB62-5122

1 Fault Found:
00778 - Steering Angle Sensor (G85)
49-00 - No Communications

I am confused as to exactly where the sensor is. Some reading tells me the G85 is behind the steering wheel, I have replaced the clock spring (which several videos claimed was the sensor too) with a used unit to find no change. This lead me to dismantle the clock spring to find it is just a clock spring - there's no sensor in there.

Next I have identified the "Steering Assist" module as being part of the power steer pump mounted below the LH headlight. Centre plug is power feed, Plug #2 is data (unplug it and the module disappears from network), Plug #3 is a 3 pin plug that goes to the steering rack. I assume this is my steering angle sensor? Testing resistance at plug#3 on the wire going to the rack shows open circuit.

Q#1: Is this sensor on the rack the G85 - or is it G250?

Another interesting thing I've noticed: The car has had a LH front accident which I assume is very recent. I notice when I removed the LH it has the fresh markings of a parts breaker AND I notice the power steer pump has a manufacture date of ... 06.09.2011. Given the car has a compliance date (off the ship and inspected in Australia) of early 2008, it appears obvious that someone has replaced the power steer pump with a used unit out of a 2011 or 12 car.

Is it possible I have a Module with incorrect coding?
Or is the G85 on the rack and try replacing it?

[MIG]

Some cars have the steering sensor in the rack and others part of the clockspring, as you said.

I think the issue was the car that the new rack came out of had ESP, and for ESP, there has to be a G85 sensor at the clockspring.

Have a read here http://www.volkspage.net/technik/ssp/ssp/SSP_259.pdf


"The steering angle sender G85
The steering angle sender is located on the
steering column between steering column switch
and steering wheel. This sensor is used on vehicle
models which are available only with the
electronic stability programme (ESP). In this case,
the power steering sensor G250 is not fitted."

[harlie]

thanks!

Now have this sorted, it was the power steer pump/module that came out of a newer car. My car has G250 but module is looking for G85.

I posted same on ross-tech forum and someone provided the correct coding for the "Steering Assist" module and it now is reading the G250.

Done!