Typical Hyundai Terracan components
1 Let’s hear it for the traditional 12-volt battery, readily available and less expensive than the enhanced flooded types used on many modern cars. For optimum reliability, invest in a quality battery and ensure that the connectors are clean and secure.
2 The alternator is located on the right-hand side of the longitudinally-installed engine and is driven by a multigroove serpentine belt. Full battery voltage can only be achieved and maintained if the alternator and belt are in good condition. Check belt tension, too.
3 The readily-accessible fuel filter assembly is located towards the lefthand side of the engine bay. It incorporates a hand-priming facility that draws diesel fuel through to the engine without the need for excessive engine cranking.
4 Built into the pump is a lift pump, as well as a high-pressure pump – as opposed to having a pump located within the fuel tank, as on many vehicles. Not shown are the fuel injectors, which are prone to failure.
5 The fuel pressure sensor is found close to the dipstick for the automatic transmission on this auto version of the Terracan. It is located on the left-hand side of the engine and mounted in the fuel rail.
6 There’s an important earth connection point at the top of the bulkhead. Make sure the connection is clean and secure. If in any doubt, dismantle the joint, clean all the components and reassemble, applying a silicone protectant.
7 This photo shows the thermostat housing, on the right-hand side of the engine and close to the engine oil dipstick, into which the coolant temperature sensor is screwed. Inspect the connections and assess wiring condition.
8 The turbocharger is mounted on the right-side of the engine at the rear. As the turbocharger shaft spins at very high speeds, efficient lubrication is essential. This means regular and frequent engine oil and filter changes.
9 The anti-lock braking system (ABS) pump must be in good condition and fully operational. Inspect all the fluid pipes and their connections, and ensure that the electrical wiring and connector assembly is in sound condition.
10 Essential to operation of the engine management system is the air mass sensor, positioned within the air filter trunking. The sensor assesses the flow of air passing through the trunking, relaying this information to the ECU, which in turn controls fuelling levels.
11 The underbonnet fuse and relay box is located on the left-hand side of the engine bay, adjacent to the inner wing. Here, we are highlighting the blue 20-amp fuse for the fuel pump. It’s always worth checking fuses, because sometimes the simplest electrical faults due to a blown fuse are overlooked.
12 Invaluable information regarding the positioning of the various fuse and relays is found on the underside of the fuse/ relay box lid. Spare fuses are also attached to the lid. If you use one of the spares, affix another to the lid.
13 There’s an additional fusebox attached to the right-hand front door pillar’s A-post, shown here after removal of its cover panel. Inspect the wiring and connections for evidence of moisture ingress – the same applies to the underbonnet fuse/relay box.
14 Visible in this shot is the brake pedal position sensor, which not only operates the brake lamps, but also tells the ECU when the brake pedal is being operated.
15 The Terracan’s diagnostic socket, seen here with the connector plug for the Snap-on SOLUS Edge tool plugged into it, is found at the base of the fascia assembly on the right-hand side of the car.
16 The introductory screenshot menu on the SOLUS Edge shows the engine ECU at start. The first line indicates ‘codes’, then ‘clear codes’ and ‘data’ – where the operator can look directly at what the ECU is seeing. The next function allows injector programming, etc.
17 Live data relating to mass air flow, intake air temperature and throttle position are being displayed in this screenshot on the Snap-on tool. Live data can be a great help, as it enables the operator to see what information the ECU is receiving in real time.