W203 Comand Speed Pulse

[142 TPL]

Hi
I have retrofitted a Comand 2.0 in my 2002 C270 Estate and I cant find the speed pulse wire that is meant to be a blck/green wire taped up in the left sill area. I have located a taped up green / black wire but it is one of a pair the other being a yellow / black both terminating in an unused green plug is this the right wire?

 

[npuk]

http://www.mbclub.co.uk/forums/electronics/34792-w203-c200-retrofit-pioneer-avic-headunit.html

 

[142 TPL]

Well now I am confused as that says the connection to the speed pulse is on the drivers side to a green / White wire

 

[mr. shr]

When I did a similar job on my old W208 (APS 30, not full blown COMAND), I found the speed pulse connector block in the passenger door sill (A pillar ??).

On my CLK there was a blue/green type connector block that had (I think) four wires going in, with only three going out. So I used the spare one for my APS unit.

Anyway, as a test I jacked up one wheel, connected a volter meter to the spare wire in the connector block and turned the raised wheel by hand. When I saw the voltage pulsing between 0 and 12 ish volts I knew I had indeed found a speed pulse signal.

You could try similar with the wires you've found.

 

[142 TPL]

So if I jack the car up put ignition on turn a wheel I should get voltage if it's a speed pulse wire

 

[mr. shr]

Yep.
Try each on in turn and you should hopefully see a voltage on one of them.
Turn the wheel slowly.

There's definitely no other connector block in that sill? You've had a good look down there?

 

[142 TPL]

That the only one that don't go anywhere and was taped and the right color.
Is that any wheel ? It's auto so I assume neutral

 

[richard]

You shouldn't need it on a W203/W209, only on most of the W208/W210 but not all !

Richard

 

[142 TPL]

Thanks Richard it's works a treat without the connection