Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[VR4Dave]

When I wrote speedo is original I did obviously mean stereo is original 

Excuse my ignorance but what do you mean get a scope on it?

[Andy B]

Oscilloscope 

School will be where most people last saw one.   
http://en.wikipedia.org/wiki/Oscilloscope

[Kevin Wood]

School will be where most people last saw one.   

.. and where I got the first one in my collection as it happens.

Kevin

[Dave DND]

School will be where most people last saw one.   

.. and where I got the first one in my collection as it happens.

Kevin

me too !!

 

[tidla]

joint venture in bolivia maybe?

[05omegav6]

speed signal is definitely blue with red trace. i use the sunroof one for a taxi meter. same for vectra c as well, though with can bus not all the blue/red wires give an analogue signal.
 think the wire runs from the ecu to the trip computer/radio with feeds to the instrument cluster and sunroof. :-/
wiring diagram in the book of lies may shed some light on this. the loom in my 54 reg ex plod is almost identical to what the book shows for late model pre face lifts.

[VR4Dave]

The plot thickens.... today when driving, the radio randomly turned on by itself, the cid didn't come on with it. When I pressed the radio power button to turn it off the radio stayed on and the cid turned on, so now normal i.e. radio on and cid as should be with radio on.
I pressed the power button once more and it all went off as normal.

There is obviously something loose somewhere, still don't understand why it affects the power steering?

Will have the stereo out for a look.
Had the glove box out to look for servotronic relay, (I think this should be a red one) but I couldn't find it, there was only a grey one under there and a plug for one that is absent, grey base on that also. Is there anywhere else it could be?

Also, don't think it will help but won't do any harm I'm going to clean wheel sensors - where are they (please don't say on wheels  ) and what do they look like?

Ta.

[VR4Dave]

The plot thickens.... today when driving, the radio randomly turned on by itself, the cid didn't come on with it. When I pressed the radio power button to turn it off the radio stayed on and the cid turned on, so now normal i.e. radio on and cid as should be with radio on.
I pressed the power button once more and it all went off as normal.

There is obviously something loose somewhere, still don't understand why it affects the power steering?

Will have the stereo out for a look.
Had the glove box out to look for servotronic relay, (I think this should be a red one) but I couldn't find it, there was only a grey one under there and a plug for one that is absent, grey base on that also. Is there anywhere else it could be?Also, don't think it will help but won't do any harm I'm going to clean wheel sensors - where are they (please don't say on wheels  ) and what do they look like?

Ta.

Anyone?

[Kevin Wood]

Still scratching my head. :-/

I would get the stereo out and see if there's any signs of someone bodging the wiring for a start. I have occasionally had my head unit so something stupid like that though.

Wheel sensors are on the hubs for the front wheels and at the rear they are inboard, either side of the diff on the halfshaft flanges. They rarely give problems, however.

Kevin

[Dave DND]

Agree - puzzling . . . .

I would try removing the stereo, and see if the other symptoms remain, just in case the stereo is pulling the signal down ?

Then try unplugging the nav, and see what works / doesn`t.

 :-/

[VR4Dave]

Cheers fella's will try running with stereo out today and report back.

Dave.

[VR4Dave]

Update:
Today I have full assistance on the steering at all speeds, whereas for the last week I've had the lower assistance level at all speeds.
The sdvc and cid speed related figures are still not working. I pulled the stereo out and it made no difference.
I did notice however that the "speed" on the cid which normally reads 0/mph (irrespective of actual speed) read f/mph a couple of times briefly.

Could servotroninc box/relay have an effect on cid readings or is the signal independant to the signal that controls pas?
I would change the relay if I could find it!

[Kevin Wood]

I would change the relay if I could find it!

Up under the dashboard above the driver's footwell, IIRC.

Kevin

[VR4Dave]

Kevin / Dave DND, as you two seem to be the one's with the ideas on this one; I swapped the sevotronic relay from my '52 cd into the MV6 and something strange happened  :-/
The MV6 which has been mainly giving limited steering assistance (i.e. high speed assistance at all speeds) is now giving full assistance (i.e. low speed assistance at all speeds)
The cd that I swapped the relay from works as normal.

The other thing I noticed, is that when I have a speed dependant function on the display I briefly get a reading such as "F"/mph which only occurs when decelerating and passing the 40mph mark, which I believe is the point at which the amount of assistance on the steering changes.

I wouldn't mind taking the car to someone to have a look but it's not the sort of fault I want to go to a local garage or dealer with, any suggestions?

[Dave DND]

Kevin / Dave DND, as you two seem to be the one's with the ideas on this one

Sorry, my expertese is more with the audio side of things than the car itself - maybe worth seeing which Oofer is nearest to you with a Tech2 as I think you are a little too far for me to investigate this any further?