TC Warning Light

[HowardSmall]

My 99MY Defender TD5 Extreme has just started having the TC light stay on from turn on. At first it did go off eventually but now stays on all the time.

I drove it over a pile of gravel the other day, just before the problem started so am wondering if a sensor or sensor wire is the cause? Any suggestions on tracking down the fault?

Thanks,

Howard

[Blknight.aus]

usually its a harness or sensor problem but you should also have the ABS light come on

[ScottW]

Might be completely different, but on the Rangies the abs sensors on the hubs slide out of place a little. A bit of a push and they go back to where they should be and everything works fine again.

[HowardSmall]

Thanks guys. Of course Black Knight I should have thought of that as the TC obviously uses the ABS. Well the ABS light does not come on so I guess it is not a sensor. If I unplug the ABS ECU the light goes off (naturally).

I have hit the ABS ECU plugs and sockets with contact cleaner but that did not make any difference and I can't see any damage to the wiring at that point. Any ideas on cause and solution? Could it be that the diagnostic needs to be reset?

It is looking like a trip to the Land Rover dealer and I hate the dollars that can cost...

Howard

[dmdigital]

The TC light might be coming on because it thinks the TC is enabled. So it may not be a "fault" rather a wiring issue. TC can also be disabled in the ECU using diagnostics.

The Wabco-D unit illuminates the ABS warning light by removing the voltage supply from it. I don't know if this is the same for the TC light. But if it is then a wiring fault may well be the cause.

TC is pin 13 on connector two of the Wabco-D.

One other thought. There's a procedure in the owner's handbook for disabling TC on starting. You have to depress the brakes 10 times in 10 seconds or something like that. It could be you have a faulty brake peddle switch.