Well first of all a big thanks to Steve Devilish for his knowledge and help today, but alas the Traction Control is still not working !
We checked continuity from bus wires at ABS
/TC pump back to IPK
and all circuits closed. Also checked continuity from ECU (Engine Control Unit)
back to IPK
and the same result, circuits all closed.
The pump is the correct one for the diesel as confirmed by Bosch technical
The dash switch is good and continuity from there to ABS
/TC pump is good
Continuity good from bus wires at ABS
/TC pump to IPK
Continuity good from ECU
bus wires to IPK
On a previous T4 (Testbook version 4.Computer Diagnostic System)
session there were no fault codes and the T4
actually said â€œ this vehicle is fitted with diesel traction control â€œ
When I switch on the car the words â€œ Traction Control â€œ appear on the IPK
but are quickly followed by the Traction Control off symbol which remains on at all times.
So back to square 1 almost and over to the gurus once more, I have left a voicemail for David in the hope that he will chip in with the debate.
One thought Steve had was around the initial work done on the car before the T4
session, and that was the removal of IPK
whilst David did hisâ€ magic â€œ before replacing with the original IPK
, could this be the issue, and could this be fooling the T4
into thinking that all is ok ?
Bus wires in the ABS
/TC pump plug, left bank 3 up yellow brown and in the right bank 3 up and yellow/ black, continuity good in both back to IPK
Bus wire continuity checked from ECU
back to IPK
Reading on test meter for all, closed circuits