Thread: Help with identity of wires

Hi Leo. I can't recall the wiring I did because it was a while ago but basically instead of the low range switch providing the signal to the Body Control Unit that the vehicle is in low range I used a press switch to tell the BCU the same thing. Not a biggy but does what I posted above. Cheers

Originally Posted by ozscott

Hi Leo. I can't recall the wiring I did because it was a while ago but basically instead of the low range switch providing the signal to the Body Control Unit that the vehicle is in low range I used a press switch to tell the BCU the same thing. Not a biggy but does what I posted above. Cheers

I'm guessing you meant to write SLABS?

Yes sorry the ABS (no SL on mine ) computer.

Cheers

Originally Posted by ozscott

I have a switch on the dash (not stock) to tell the BCU that I'm in low range. Might leave it that way. Good to cycle the modulator without going into low and I can choose how aggressive I want the traction control to be. Cheers

Actually the hi/low input has nothing to do with the traction control, the ABS uses it only for HDC, it's more important for the engine management:

High/low detect switchA high/low detect switch is fitted in the front output housing and connects to earth when low is selected. The switch is
connected to the engine ECM, the SLABS ECU and the EAT ECU. The purpose of the switch is to enable selection
of the hill descent feature and to modify the engine fuelling and automatic gearbox gearshift maps stored within the
respective ECM's and ECU's

If you have an EGT gauge you'll observe that if "low selected" input is sent without the gear to be in low the EGT will go high and the throttle will be more agressive cos there will be more fuel injected as for the low gear's higher torque without mechanical backup though i found this usefull to climb steep hills without gearing down too much.

Thanks mate. I had read that it was more aggressive in low...cant recall where. But if it's not in RAVE it's not true!

Cheers