Typ­i­cal Hyundai Ter­ra­can com­po­nents

Car Mechanics (UK) - - Electronic Diagnostics -

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.

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