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[kcl]

As posted in my steering thread I have had two times within three days ESP light on. Both times on motorway run, after about 15 minutes and 20 kilometers drive. The code according to my generic reader was C0710 which points to steering angle sensor malfunction.

I also know that you folks have ever had ESP in Omegas but still, if anyone with TIS could chekc if there is anything about this or give me locations of components etc.

I also had gearbox code P1560 which was present while car was stationary and off, could be related to low battery?

Also found once two peculiar ones from AC ECU:
00032 - Left Solar Sensor Low Input
Not present

00034 - Right Solar Sensor Low Input
Not present

AFAIK only one sun sensor in Omega?

[feeutfo]

Re sun sensor, yes only one. But has two halves within it for passenger and driver. I once heard TB say Sun sensor often fails. Replace it, it just levers out with a flat blade screw driver type tool, where the dash meats the wind screen in the centre.

[Kevin Wood]

You occasionally see spurious codes for the sun sensor too, though. I'd clear them and see if they return before worrying too much.

As for the ESP, I can have a dig later and see if anything comes to light.

[kcl]

Re sun sensor, yes only one. But has two halves within it for passenger and driver. I once heard TB say Sun sensor often fails. Replace it, it just levers out with a flat blade screw driver type tool, where the dash meats the wind screen in the centre.

Thanks. I assume this to be "dealer-only" component?

[RobG]

Re sun sensor, yes only one. But has two halves within it for passenger and driver. I once heard TB say Sun sensor often fails. Replace it, it just levers out with a flat blade screw driver type tool, where the dash meats the wind screen in the centre.

Thanks. I assume this to be "dealer-only" component?

Yep

[kcl]

Ok then, will see if the coders for sun sensor come back.

this steering-angle issue worries me quite a lot, especially due the previous (on-going?) problem with the blind spot in steering. Will pop the panels off from steering column and see if anything obvious comes up. Still need to find out where is this sensor  And my code-reader does not give live data on ESP nor servotronic so that limits a bit.

[TheBoy]

Clear the sun codes, watch live data as you cover and uncover each side. If it comes back within a month, replace

[kcl]

No luck with this then... yet. ESP light and code C0710 only comes when driving at speeds above 100 km/h. I could not find anything on TIS about this... (why is it so hard to find anything on TIS; if I write "ESP" on keyword search nothing comes up, writing "calibration" to find how to calibrate the sensor gives 6 hits with no luck). What I did find is that TC should be "calibrated" driving up to 100 km/h and let it coast to 70 km/h 5 times in a row, then it calibrates itself to "new" wheel size, could this my thing be related to this (given the speed required to light the ESP light)?

[TheBoy]

Not got TIS on this PC, so can't look up the code.  Will try to remember later.

[kcl]

Some more food for thoughts: is there any marking on steering wheel and column to check if the wheel has been removed in the past? I'm still thinking this maight relate to the "original" problem with the blind spot and remaining knock. As said, pitman arm seems straight, both track rods (given the precision how they can be measured at all) are even lenghts, full alignment done when winter tyres were on. Now with summer tyres and speeds over 100 km/h ESP light is lit and code C0710 stored. When reading the codes it says not present as it clears when ever engine is turned off.

In my other thread someone put up pics what to look for to make sure column is aligned correct with steering box input. Do I need to take off the whole column? Can I avoid opening and replacing the "headless bolt"?

Car runs and drives perfectly, this is just annoying and makes me unhappy when something is not totally as it should be.

[Kevin Wood]

Couple of possibilities under that code:

Steering Angle Sensor Not Or Incorrect Calibrated
Steering Angle Sensor Circuit Malfunction
Steering Angle Sensor Incorrect Signal
Steering Angle Sensor Incorrect Installation

The signal of the steering angle sensor is out of nominal range.
Effect:

The ABS function is locked.
The traction control function is locked.
The ESP function is locked.


Procedure in all cases is basically to verify power, ground and CAN connections to the steering angle sensor.

I wonder if the steering has been assembled off-centre?

I can imagine that, once the vehicle speed has reached 100kph, the system assumes that the steering is more-or-less straight, and, if that isn't reflected in the reading from the steering angle sensor, it raises a fault?

There is a calibration procedure for the steering angle sensor which can be carried out with a tech 2.

[kcl]

Some progress. Decided to make sure all is correct. Removed the steering wheel, measured the middle of sturdy steering bar-thingy where idler and pitman arm connect. Made sure it oline up with exact middle of car, which it to my wonder did not despite I had tried to visually make sure pitman arm is straight. Now, having steering box exactly center put steering wheel to staright ahead position and visually adjusted toe. Waiting for confirmation of my time for full alignment. No more code C0710 which appears to be due poor workmanship in latest wheel alignment setup in the winter  Well, hoping for the best, again. No blind spot. Some joint is dry because some creaking is heard when turning tight in low speed. AND, one new thing: when cold, just after start, steering is quite heavy. Will re-check pas fluid level and check this after alignment. Tired pump perhaps would cause this? When warm, all is just like it should be.

[TheBoy]

Sounds like you're making progress kcl

Stability Control was never standard here, and very, very few took up the option, so related faults are all new to us

Heavy steering when cold - only at idle, or with a few revs on?

[kcl]

Sounds like you're making progress kcl

Stability Control was never standard here, and very, very few took up the option, so related faults are all new to us

Heavy steering when cold - only at idle, or with a few revs on?

Well, I'm merely losing my mind with this car!  This morning, temp two degrees and the steering is stiff as ....well, it is heavy. ONLY to left. And only on or near idle. AND the heviness is kind of a blind spot in power assistance. How does the PAS work? It really seems like a sticking valve or something like that. And all point towards hydraulic problem. PAS fluid level ok, no leaks. All mechanical joints in steering are ok (or at least I think so at the moment  ) If it was busted PAS pump it would be stiff to both directions? And if it was the box itself it would not feel like this... The pas if working, you can hear it "hissing" when turning as it should... there is just this "hard-to-start-the-turn" to left and as said, only to left.

So, if someone can shed some light on how the PAS system works I may find the "left-turn-related" valve and find out why is it sticking.

[kcl]

Sounds like you're making progress kcl

Stability Control was never standard here, and very, very few took up the option, so related faults are all new to us
Heavy steering when cold - only at idle, or with a few revs on?

The thoughts I have had on this are that the steering is allowed to be +/- 3 or 5 degrees out from center, any excess to that will illuminate the light. Simply a sensor in the steering rack, near pedals. Can be calibrated with TECHII, simple readers anly give codes (at least my cheapo can no tcommunicate or calibrate it).

It is a very rare thing here also as it was only fitted to cars from MY2002 up which means only a few cars in general.