I have a 2001 TD5 Auto Disco and I am trying to understand the function of the Torque Converter lock up.
I am trying to do this as a thought engaging the lock up would aid in engine breaking, but now I’m not so sure.
I have a volt meter on the orange and white cable (Pin 33) coming out from the Auto ECU which goes to the Lock up solenoid. All it seams to do is energise at 3rd gear and de energise at near standstill.
The RAVE cd suggests that it plays a part in Low Range, but I can’t get it to do anything other than engage at 3rd gear.
I’m a bit of novice at driving autos so have been practicing left foot braking on descents but if the lock up is not engaged then this seams a waste of time
Have I misunderstood the purpose of the lock up?