Test HDC as mentioned.  For TC - park the car on the side of the road - one that has a gravel shoulder.  Park so the drivers side wheels are on the bitumen and the passenger side on the gravel and the floor it - try to spin the wheels.  If TC is working the ones on the gravel will spin activating TC and transfer drive to the drivers side wheel.  Inside the car you will feel a shuddering (same as when ABS and HDC activates - is all normal) and the TC light will come on. 
Garry
				
			 
			
		 
			
				
			
			
				REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101 
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
			
			
		 
	
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