Hopefully the last update......all test carried out with the Range Rover stationary....
So I disconnected the E-box cooling fan and ran the engine with bonnet closed to generate lots of heat in the engine bay while monitoring the temperature in the E-box. It took some time but the E-box eventually reached a temperature of 67C at which point, the engine cut out, gearbox faulty was displayed and no engine light on the dash. I opened the bonnet and the E-box and allowed it to cool to 60C at which point the engine started again. Repeated the above and yet again the engine cut out when the E-box reached 67C. I then connected the cooling fan so it was running constantly and repeated the test again. This time the E-box only achieved at temperature of 40C, no amount of revs could raise the temperature above 40C. Next I reconnected the cooling fan to the ECU so it would be controlled bu the engine ECU. I repeated the test again and the E-box temperature rose to 60C at which point the cooling fan cut in!!! The temperature then fell to 36C at which point the fan cut out. I repeated this several time with no issues with the engine cutting out. I can only conclude that maybe the cooling can had seized as the Range Rover had been parked up for some time, and it wound be very rare for the E- box temperature to reach 60C to call for the fan to run. I will monitor the E-box temperature over the next week during normal driving, but I don’t expect to see temperatures anywhere near that high through normal driving. Maybe stuck in traffic for over an hour in the middle of summer may get near!!!!
