Tracing and fixing faults in electronic engine management systems
Rob Hawkins visits independent Land Rover specialist Four Plus 4 to find the common electricalrelated engine problems associated with the 3.0 TDV6 engine in the Discovery 4.
AIRFLOW METERS – Failure of one or both airflow meters will usually raise a relevant fault code, but also check the boost and induction hoses, which can split and create air leaks that can be the cause. A smoke test will help to check them.
LAND ROVER DISCOVERY 4 3.0 TDV6
The Ford-developed 2993cc quadcam twin-turbocharged V6 diesel engine that first appeared in 2009 powers a wide range of vehicles, from the Jaguar XF to Range Rovers and Land Rovers, including the 2011 Discovery 4 we’re focusing on for this month’s Electronic Diagnostics. Independent Land Rover specialist Four Plus 4 has repaired and replaced more of these engines than they care to remember, although they do stress that’s why people come to them, whereas they only service or don’t see the ones that are running fine. Perhaps those engines whose crankshafts have broken have simply been unlucky.
When it comes to identifying the engine-related electrical sensors and associated components on the Discovery 4, there’s not a great deal to see from the top of the engine. There’s a little more with the engine cover removed (it sits on locating pegs and requires the oil fller cap to be removed), and there are more components to be found underneath.
With the help of Four Plus 4, we’ve outlined some of the main electrical components for the engine and explained what can go wrong. Some of the problems are quite disturbing, especially if the bodywork and chassis need separating to be able to fix them.
2993cc 6-cylinder turbodiesel 241bhp
Typical Land Rover Discovery 4 COMPONENTS
