03 C5 2.0 HDI 90 what makes the speedo work

[citronut]

just looked at my friends C5 as in title,

speedo hasnt worked for sometime now, he has only just managed to let me have it in to look into it,

pluged me DIS-LEXIA up it which came back with no faults found, except for a and display fault,

jacked it up to get under and have a look at the transponder, what transponder it aint got one, or at least not were i expected to see it on the diff housing

so is it done trough the ABS sensors/control unit then, if so how do i fix it?????

[RichardW]

Yes, comes off the ABS sensors AFAIK. Is the odo still counting? IIRC C5s are prone to failure of the stepper motor in the speedo head that stops the needle working.

[citronut]

thanks Richard
my DIS-LEXIA can run the speedo in an actuator test run

[wheeler]

is the ABS or ESP lights on ?
Also as said is it still counting up miles ?

[hamster99]

Your Lexia should also be able to detect the speed at each wheel which would confirm whether the ABS sensors are working. AFAIK the speed is derived from the average of the sensors.

[citronut]

is the ABS or ESP lights on ?

Your Lexia should also be able to detect the speed at each wheel which would confirm whether the ABS sensors are working. AFAIK the speed is derived from the average of the sensors.

nop
and nout recorded and my DIS-LEXIA found no other faults

Also as said is it still counting up miles ?

dont know i will try it tomorrow

Your Lexia should also be able to detect the speed at each wheel which would confirm whether the ABS sensors are working. AFAIK the speed is derived from the average of the sensors.

[citronut]

switched the speedo and rev counter stepper motors over today and bongo both seem to be working now

very very easy job