CIM Problem?

[stonedagain]

Hi,
Bought a vectra a couple of weeks ago. Whilst turning the steering wheel, the power assistance is on/off, making the steering feel notchy. When I first bought the car, the steering warning lamp was on, this was caused by the plug for the steering angle sensor on the steering rack not being connected. I re-connected the plug, cleared the fault codes & the warning lamp is now off, but the steering is still the same. There are no fault codes present for the steering or the CIM, but when I read the measuring blocks for the CIM the steering angle sensor shows 0 degrees all the time. Would this mean a faulty CIM or will the steering angle sensor need re-calibrating? Also, is there a steering angle sensor in the CIM itself, or is the one on the steering rack the only one?

[iulian1971]

Hi.
First of all check the alternator voltage. It must be between 14-14.4V idle speed.
Steering angle sensor is in the CIM and it should change value when steering. Try to recalibrate it.

[stonedagain]

Thanks for replying.
Alternator voltage is fine (the alternator has just been rebuilt). The steering angle sensor is definitely in the rack on my car (no esp). Thre is a short harness which plugs into the rack at one end, the other end plugs into the steering pump. I just can't understand why the CIM measuring blocks show the steering angle sensor but not in the measuring blocks for the pump. My next step is to try re-calibrating the sensor, but for that I need the PIN code. I can't order the car pass for my car until I receive the registration document from DVLA.