Thread: D2 TC Brakes not activating on wheel spin.

Mate don't expect to see the spining wheel to actually stop when TC comes in,it brakes the spinining wheel so torque is transfered(through the "open diff") to the other wheel.
Put someone to observe from the outside,if while the left front wheel is spining (for example) and the right one takes some torque(spins but slower) then the TC is working(and the brakes will be quite hot afterwards!) but can't do miracles on very slippery stuff,if it was "wheels on air" kind of action,you might see the TC stoping the spining wheel for fractions of seconds.
Cheers.

Originally Posted by XHPBT1

just a thought, is your brake lights working properly? meaning the switch at the break pedal...

The brake light switch shouldn't have any influence on the ABS system, although it's probably a good safety check.

The ABS system uses the shuttle valve switch to signal the ECU that the brakes have been applied by the driver. In the case of Leigh's problem with ETC this won't the source of the problem. The ETC function relies on the system detecting a wheel accelerating faster than average and this means the ABS sensors are the key input.

To test you'd need access to a diagnostic system. Either Nanocom or Hawkeye will do the job if you have one. There is a tech note describing how to troubleshoot wheel sensor faults:



Basically

1) check and replace wheel sensors where necessary,
if that doesn't work
2) replace SLABS ECU with PN# SRD500070

If fault codes remain stored in the SLABS ECU as identified in this bulletin and/or no faults were found while carrying out the diagnostic procedure on the wheel speed sensor, renew the SLABS ECU with SLABS ECU Part No. SRD500070