CVVT SystemCVVT SystemCVVT SystemCVVT System [608128]

CVVT SystemCVVT SystemCVVT SystemCVVT System
((( (Continuously Variable Valve Timing)Continuously Variable Valve Timing)Continuously Variable Valve Timing)Continuously Variable Valve Timing)

2 2
1. Introduction of the CVVT System1. Introduction of the CVVT System
2. CVVT System Components, Function2. CVVT System Components, Function
3. CVVT System Diagnosis3. CVVT System Diagnosis
4. CVVT DTC4. CVVT DTC
5. Oil specification for Beta CVVT engine5. Oil specification for Beta CVVT engine
6. Waveform6. Waveform
7. Models with CVVT system7. Models with CVVT system

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CVVT(Continuously Variable Valve Timing) SystemCVVT(Continuously Variable Valve Timing) System
The CVVT, which is installed on the exhaust camshaf t controls intake valve The CVVT, which is installed on the exhaust camshaf t controls intake valve
open and close timing in order to open and close timing in order to improve engine performance.improve engine performance.
The intake valve timing is optimized by CVVT system depending on engine rpm. The intake valve timing is optimized by CVVT system depending on engine rpm.
Advantages of CVVTAdvantages of CVVT
șșReduced Fuel ConsumptionReduced Fuel Consumption : :
– -ReducReduc e Pumpine Pumpin g loss becag loss beca use of incruse of incr easing vaeasing va lve overlve over laplap
șșReduced emissionReduced emission : :
– -RedReduce NOuce NO x xby EGR eby EGR e ffecffect becat beca use of vuse of v alvalve overe over lap oplap op timtimizaizationtion
șșImproved performance and increased torque at low Improved performance and increased torque at low speedspeed : :
– -ImprImproved volumoved volum etric and theretric and ther modynmodyn amic efficiamic effici ency by variaency by varia ble valve timinble valve timin g g

4 4
① ①RoRota tati tion fon forcorce of ce of c rankrankshaft shaft is is tr transmiansmi tt tted to exhaust ed to exhaust c camshaamsha ft by ft by ti timing ming beltbelt. .
② ②RoRota tati tion foon fo rce of exhaust rce of exhaust c camshaft amshaft is is tr transmiansmi tt tted ted to into intakake e c camshaft amshaft by by ti timing cming c hain.hain.RotationRotation
DirectionDirectionEx Exhaushaust Ct Camshamsh aftaft
Intake CamshaftIntake Camshaft
CrankshaftCrankshaftTiming BeltTiming BeltTiming CTiming C haihain nCVVTCVVT

5 5
Oil Temperature Sensor Oil Temperature Sensor  – –
Air Flow Sensor (HOT Film Type)Air Flow Sensor (HOT Film Type) MAP Sensor MAP Sensor OCV FILTEROCV FILTER – -CVVT, OCV(Oil Control Valve)CVVT, OCV(Oil Control Valve) – –

6 6
CVVT Parts LocationCVVT Parts Location

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0 0 1 12 20 0 2 24 40 0 – -1 12 20 0 – -2 24 40 0EXHAUSTEXHAUST INTAKEINTAKE
40CA40CA
OVERLAPOVERLAPValve timing variationValve timing variation

8 8
Exhaust Valve TimingExhaust Valve Timing Intake Valve TimingIntake Valve Timing
BetaBeta
EngineEngine
withwith
CVVTCVVTBetaBeta
EngineEngine

9 9
S Se ect cti ion Bon B- -B BS Se ect cti ion on A- A-A ACVVT Oil PassageCVVT Oil Passage
From Cylinder BlockFrom Cylinder BlockR Re et ta ar rd d A Ad dv va an nc ce e
D DR RA AI IN N D DR RA AI IN N

10 10
RetardRetard
AdvanceAdvanceRotating Direction of EngineRotating Direction of Engine
Reduced fuel consumptionReduced fuel consumptionImproved TorqueImproved TorqueImproved performanceImproved performanceStable combustionStable combustionEfficiencyEfficiency
 Advance Advance Advance AdvanceRetardRetardRetardRetardIntake V/TimingIntake V/Timing
 At middle condition At middle condition At high load, At high load,
low speedlow speed At high load, At high load,
high speedhigh speed At low load At low loadDriving conditionDriving condition

11 11
HoldHold
R Re et ta ar rd d A Ad dv va an nc ce e

12 12
RetardRetard
ReturnReturn

13 13
 Advance Advance
ReturnReturn

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ROTORROTOR
VANEVANEHOUSINGHOUSING
VANEVANE
AdvanceAdvance
ChamberChamberRetardRetard
ChamberChamber
※ ※The OThe O il il is is su supplipplied ted to tho the re ret etar ard cd chamber hamber and aand a dvancdvanc e chamber e chamber by byO OC CV contrV contr ol. ol.

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1. 1.Rotor vRotor v ane is insane is ins talletalled on exhausd on exhaus t-camt-cam shaft by bshaft by b oltolt
2. Camshaft-intake and housing of CVVT is 2. Camshaft-intake and housing of CVVT is connected by chainconnected by chain
( Sprocket is attached on housing. ( Sprocket is attached on housing. So, phase difference occurs between HousingSo, phase difference occurs between Housing
and Rotor Vane of CVVT).and Rotor Vane of CVVT).
3. Rotor vane is 3. Rotor vane is fixed on housing fixed on housing by stopper pin at by stopper pin at the positionthe position of the maximum reof the maximum re tardtard
4. If the oil is supplied to advance chamber, Housi ng will be advanced and stopper pin is 4. If the oil is supplied to advance chamber, Housi ng will be advanced and stopper pin is
unlocked.unlocked.
5. 5. Timing Timing of of intake-camshaft intake-camshaft is is advanced.advanced.
6. Engine off condition. The oil is drained from th e advance chamber, the housing returned 6. Engine off condition. The oil is drained from th e advance chamber, the housing returned
to retard position and fixed by pin due to lock of position to retard position and fixed by pin due to lock of position

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0 020 2040 4060 6080 80100 100120 120140 140160 160
1 15 50 00 02 20 00 00 02 25 50 00 03 30 00 00 03 35 50 00 04 40 00 00 04 45 50 00 05 50 00 00 05 55 50 00 06 60 00 00 0
ENGINE SPEED (RPM)ENGINE SPEED (RPM)   P    P   O    O   W    W   E    E   R    R   (    (   P    P   S    S   )    )
4 46 68 810 1012 1214 1416 1618 1820 20
   T    T   O    O   R    R   Q    Q   U    U   E    E   (    (   k    k  g   g .  .  m   m   )    )MAX. POWER : 143PS/6000RPMMAX. POWER : 143PS/6000RPM
MAX. TORQUE : 19.0kg.m/4500RPMMAX. TORQUE : 19.0kg.m/4500RPM
PERFORMANCE CURVEPERFORMANCE CURVE
(G4GC 2.0L CVVT with CCC)(G4GC 2.0L CVVT with CCC)PERFORMANCE CURVEPERFORMANCE CURVE
(G4GC 2.0L CVVT with CCC)(G4GC 2.0L CVVT with CCC)
0 020 2040 4060 6080 80100 100120 120140 140160 160
1 15 50 00 02 20 00 00 02 25 50 00 03 30 00 00 03 35 50 00 04 40 00 00 04 45 50 00 05 50 00 00 05 55 50 00 06 60 00 00 0
ENG.SPEED (rpm)ENG.SPEED (rpm)   P   P   O   O   W   W   E   E   R   R   (    (   P   P   S   S   )    )
4 46 68 810 1012 1214 1416 1618 1820 20
   T    T   O   O   R   R   Q   Q   U   U   E   E   (    (   k    k  g   g .  .  m   m   )    )2.0L CCC+UCC (XD) Max.PWR : 137/60002.0L CCC+UCC (XD) Max.PWR : 137/6000
2.0L 2.0L CCC CCC (GK) Max(GK) Max .PW .PWR R : : 139/6000139/6000
2.0L CCC+UCC (XD) Max. TQ : 18.2/45002.0L CCC+UCC (XD) Max. TQ : 18.2/4500
2.0L 2.0L CCC CCC (GK) (GK) Max. Max. TQ TQ : : 18.6/450018.6/4500
PERFORMANCE CURVEPERFORMANCE CURVE
(G4GC 2.0L with CCC)(G4GC 2.0L with CCC)PERFORMANCE CURVEPERFORMANCE CURVE
(G4GC 2.0L with CCC)(G4GC 2.0L with CCC)

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• •LocatLocat ion : ion : End oEnd o f the f the exhauexhau st cst camshaamsha ft ft
• •TypType of e of CVVT CVVT : va: vane tne typeype
• •OpeOperatration ion ranrange ge : 4: 40 0± ±2 2˚ ˚Crank angle (20Crank angle (20 ± ±1 1˚ ˚Camshaft angle)Camshaft angle)
• •OpOpereratation Coion Co ndnditi itionon
①①Oil Temperature range : -40 ~ +130Oil Temperature range : -40 ~ +130 ˚ ˚C C
②②Oil Pressure range : 0 ~ 1000kPaOil Pressure range : 0 ~ 1000kPa
③③Engine speed range : 650 ~ 6000 Engine speed range : 650 ~ 6000 rpmrpm
• •StoStoppepper Pin Rer Pin Re lealease Prse Pr essessureure –  – 
MMi in ni immu um m R Re el le ea as se e 5 54 4k kP Pa a
F Fu ul ll ly y R Re el le ea as se e 1 19 91 1k kP Pa a

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BOLT, HEXABOLT, HEXA
CHIP, VANECHIP, VANE
SEALSEAL
LOCK LOCK 
P PIN IN
SPROCKETSPROCKET –  –

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① ①This pin on the camshaThis pin on the camsha ft sft should be smoohould be smoo th thly insly ins erterted and ed and asassesembled wmbled w it ith thh the hole on Ce hole on C VVT.VVT.
CamshaftCamshaft
CVVT ACVVT A SSSSY YCVVT BOLTCVVT BOLT
ROTOR VANEROTOR VANE② ②Tighten the bolt to Assemble the CVVT and the Camsh aft. Tighten the bolt to Assemble the CVVT and the Camsh aft.
(Apply the oil on the bolt before tightening it.)(Apply the oil on the bolt before tightening it.)M Matching atching pinpin –  –

20 20  –  – 
O Oi il l SuSuppppl ly foy for r RetRetard Card C hamhamberber
O Oi il l SuSuppppl ly for Ay for A dvancdvanc e e C ChamhamberberC Camams shaft shaft s i id de vie viewew C CVVT VVT s si ide viede vie w w

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Maximum RetardMaximum Retard Maximum AdvanceMaximum AdvanceEngineEngine
RotationRotationRetardRetard
Chamber Chamber AdvanceAdvance
Chamber Chamber 
MiddleMiddle
The opening timing of intake valve will be advanced , if the housing is rotated to engine rotation The opening timing of intake valve will be advanced , if the housing is rotated to engine rotation
direcdirec ti tionon. ( . (T The inthe int ake valake val ve is opve is op ened at Aened at A T TDC DC 1 11 1 in maximum retin maximum ret ard pard p ositosition, the intion, the int ake valake val ve isve is
opopened at BTDened at BTD C C 2 29 9 in maxiin maxi mum advancmum advanc e poe posi sit tion)ion)Positioned betweenPositioned between
ATDC 11 and BTDC29ATDC 11 and BTDC29
(Maximum o(Maximum o peratperat ionion
angle of CVVT is 40angle of CVVT is 40
degdegre ree of ce of c ra rank annk an g gle le) ) –  –

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① ①Dropped one Dropped one cannot be reused cannot be reused – –CVVT may not bCVVT may not b e operated due e operated due to the external impact.to the external impact.
② ②Keep the tightening torque of CVVT bolt while tight ening it. Keep the tightening torque of CVVT bolt while tight ening it. (Specification : 6.6 ~ 7.8 kgf m)(Specification : 6.6 ~ 7.8 kgf m)
– -Lower thaLower tha n specificatn specificat ion : Bolt can be loosened and CVVT is separaion : Bolt can be loosened and CVVT is separa ted from the camshaft,ted from the camshaft,
it may result in the damage of engine.it may result in the damage of engine.
– -HigheHighe r than r than spec. : Cspec. : C VVT may nVVT may n ot be oot be o peratperat ed due ed due to the to the plasticplastic defordefor mation.mation.
③ ③Do not overhaul CVVT even though CVVT is suspected and send defected parts to the parts Do not overhaul CVVT even though CVVT is suspected and send defected parts to the parts
supplier.supplier.
–Because CVVT is assembled Because CVVT is assembled by using the unby using the un ique tool, it may ique tool, it may not be operated if not be operated if it is overhauledit is overhauled
and reaand rea ssembled in ssembled in the shop. the shop. If CVVT If CVVT was overhauledwas overhauled , it , it should bshould b e repe rep laced with laced with new onew o ne.ne.
※※Do not loosen or reassemble this bolt.Do not loosen or reassemble this bolt.
If it is overhauled, it should be replacedIf it is overhauled, it should be replaced
with new one.with new one. –  –

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④ ④Be cBe car areful eful t the clehe cle anneanne ss ss of of CCVVTVVToil oil paspasssage on thage on th e cye cyllininder heder he ad, cyad, cy llininder blder bl ocock k andand
camshaft.camshaft.
– -To pTo pr reveevent nt t the he O OC CV maV ma l lfunfunctiction by foreion by forei g gn man ma t ter eri ial al
⑤ ⑤Av Avoid the oid the scratscrat c ch on surh on sur face oface o f t f the rhe rotor vane otor vane w when then t he CVVT he CVVT is isinsinst tal all led on the ed on the c camsamshafthaft. .
(Do not depress CVVT strongly and do not rotate rel atively while the pin of the camshaft is (Do not depress CVVT strongly and do not rotate rel atively while the pin of the camshaft is
not inserted into the hole on CVVT.)not inserted into the hole on CVVT.)
– -The reThe re s sponse of tponse of t he CVVT che CVVT c an be decrean be decre asased by ed by oil oil l leaeak kage becausage becaus e of scrae of scra t tch dch damamage.age.
M Matching atching pinpin O Oi il Lel Leakage cakage c anan
be ocbe oc c cur urre red d –  –

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⑥ ⑥Do not hDo not h old told the he C CVVT asVVT as sesemblmbly by but ut holhold thd the camse cams haft haft by by t the he vicevicewhen twhen t he he t tightighten ten thehe
mounting bolt of the CVVT.mounting bolt of the CVVT.
– -C CVVT maVVT ma y y not not be operbe oper at ated due ted due t o tho the ple plasast ti ic c defordefor mamat ti ion.on.ScratchScratch –  –

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1. Fix the camshaft using the vice.1. Fix the camshaft using the vice.
(Avoid the damage on the cam or journal)(Avoid the damage on the cam or journal)
2. Make sure whether CVVT is rotated or not.2. Make sure whether CVVT is rotated or not.
(should not be rotated)(should not be rotated)
3. Using some tape or other things, clog every hole s except 3. Using some tape or other things, clog every hole s except
one hole (nearest to CVVT) designated by black arro w on one hole (nearest to CVVT) designated by black arro w on
the right side figure.the right side figure. –  – 
CamshaftCamshaftCVVT Ass’yCVVT Ass’y Center BoltCenter Bolt
ViseVise

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4. Apply the air of 100kPa into the hole which is n ot clogged in procedure ‘3’. 4. Apply the air of 100kPa into the hole which is n ot clogged in procedure ‘3’.
–This is to This is to relearelea se the lose the lo ck pin inck pin in side of Cside of C VVT.VVT.
–Even though CVVT is not Even though CVVT is not rotated by hand, it rotated by hand, it can be rotated ncan be rotated n aturally depends on the aturally depends on the strength of air strength of air 
pressure.pressure.
–The lock pThe lock p in may noin may no t be relet be rele ased if thased if th ere is a lere is a l eakageakag e when te when t heheair is aair is a ppliepplie d.d.
(Lower than pin releasing pressure)(Lower than pin releasing pressure)
5. Rotate CVVT by 5. Rotate CVVT by hand in the hand in the direction of advance (red direction of advance (red arrow onarrow on the figure) under the figure) under the condition ‘4’.the condition ‘4’.
–CVVT shouCVVT shou ld be rotald be rota ted smootted smoot hly in the dihly in the di rection orection o f advancf advanc e ande and retarretard if the lock pid if the lock pi n was relen was rele ased.ased.
(However, the air pressure is released and CVVT is returned to maximum retarded position, it cannot (However, the air pressure is released and CVVT is returned to maximum retarded position, it cannot
be rotated if the lock pin is locked again.)be rotated if the lock pin is locked again.)
–The overall The overall rotating angle rotating angle of CVVT from of CVVT from maximum retarded to maximum retarded to maximum advanced position maximum advanced position is 20is 20
degrees.degrees.
6. Replace with new one if there is a faulty.6. Replace with new one if there is a faulty.
Rotate CVVT up to Rotate CVVT up to maximum retarded position to maximum retarded position to lock lock the lock pin if there the lock pin if there is no problem.is no problem. –  –

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OCV SpecificationOCV Specification
①①Voltage : 12VVoltage : 12V
②②Coil Resistance : 7.4Coil Resistance : 7.4 ± ±0.50.5Ω Ω(at 20(at 20℃℃) )
③③Control current : 100Control current : 100 ～～1000 mA1000 mA
④④Insulation Resistance : over 50MInsulation Resistance : over 50M Ω Ω(at 500V)(at 500V)
⑤⑤ Assembly air-tightness : Leakage test – Assembly air-tightness : Leakage test – Leakage should be less thanLeakage should be less than
1.01.0㎤㎤/min(Apply air pressure 200 kPa)/min(Apply air pressure 200 kPa)
Operation conditionOperation condition
OIL TOIL T empemperaeraturture Rane Ran gege: -40: -40～～+130+130℃℃
OIL Pressure Range : 0OIL Pressure Range : 0 ～～1000 kPa1000 kPa
Voltage Range : 10Voltage Range : 10 ～～16 V16 V –  –

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STATOR SUBSTATOR SUB
ASS'YASS'Y
COIL ASS'YCOIL ASS'Y
RI RING SEAL ONG SEAL O CV CV PLUPLUNGER ANGER A SS SS' 'Y Y
YOKE ASS'YYOKE ASS'Y
BRACKETBRACKETSPOOLSPOOL RI RING SEANG SEA L L
O OC CV V
SPRING,SPRING,
PLUNGERPLUNGER
GU GUI IDE, DE, SPRISPRING NGSLEEVE,SLEEVE,
VALVEVALVERI RING SEANG SEA L L
O OC CV V –  –

29 29
① ①Dropped one cannot be reused.Dropped one cannot be reused.
– -OCV mOCV m ay not ay not be opbe op eratederated , If i, If it was t was deformdeform ed dued du e to e to the exthe ex ternalternal impact,impact,
② ②When the OCV When the OCV is replaced, be careful is replaced, be careful the cleanness to avoid the cleanness to avoid thetheinflow of foreign inflow of foreign substancesubstance
in CVVT.in CVVT.
– -OCV lockinOCV lockin g due to the inflow of foreign substg due to the inflow of foreign subst ance will resuance will resu lt in malfunctiolt in malfunctio n of CVVTn of CVVT
③ ③Don't touch the OCV sleeve to prevent that a foreig n substance flow in CVVT, When you repair  Don't touch the OCV sleeve to prevent that a foreig n substance flow in CVVT, When you repair 
the CVVT.the CVVT.
④ ④When OCV is installed to engine,When OCV is installed to engine,
– -Don't usDon't us e a OCV yoke as a hae a OCV yoke as a ha ndle or hndle or h ook when took when t he engihe engi ne is movedne is moved . .
– -To prTo pr event event the dethe de formatformat ion of ion of OCV.OCV.
⑤ ⑤If OCV is stuck with a foreign suIf OCV is stuck with a foreign su bstancebstance , you must repla, you must repla ce withce with new OCV.new OCV.
(even thought you remove a foreign substance, don't reused OCV.) (even thought you remove a foreign substance, don't reused OCV.) –  –

30 30
O OC CV V
BattBatter ery y PoPowerwer
after mainafter main
relay relay 1 1 2 2
1111
OCOCV contV cont r rol ol
E EC CM M –  –

31 31
I Id dl le e c co on nd di it ti io on n 2 20 00 00 0r rp pm m f fu ul ll l l lo oa ad d c co on nd di it ti io on n
9933% % ddututy ay at t oscosciilllloscoscopope funce func ttiion is on is equals equals tto 7% o 7% ddututy ay at t ccururrerennt t dadatta.a.
OOsscciilllloscoposcop e : e : (+) dut(+) dut y, y, CCururrrent ent data : data : (-(-) d) dututy y  –  –

32 32
Check resistance of OCVCheck resistance of OCV
① ①Disconnect OCV connector.Disconnect OCV connector.
② ②Measure resistance of OCVMeasure resistance of OCV
– -SpeSpecificificatication : 6on : 6 .9 ~ 7.9 ~ 7 .9 .9Ω Ω(20(20℃ ℃) )
③ ③If out of range, replace with new one.If out of range, replace with new one.
Check the operation of OCVCheck the operation of OCV
① ①Disassemble OCV from cylinder head.Disassemble OCV from cylinder head.
② ②Connect the Battery.Connect the Battery.
– -Check Check that Sthat S POOL iPOOL i s moves move d towd tow ardard
(#2 direction)(#2 direction)
③ ③Disconnect to BatteryDisconnect to Battery
– -Check thCheck th at SPOOL iat SPOOL i s returs retur ned (#ned (# 3 direc3 direc tion)tion)
2 2③ ③
3 3 –  –

33 33
① ①OCV spool is locked OCV spool is locked when the foreign substance clogged between OCV slee ve and when the foreign substance clogged between OCV slee ve and spool.spool.
② ②If the CVVT is not operated. The camshaft’s real po sition and target position is not matched. If the CVVT is not operated. The camshaft’s real po sition and target position is not matched.
③ ③If it is fixed at advanced position. The engine vib ration and engine stop occurred at the If it is fixed at advanced position. The engine vib ration and engine stop occurred at the
engine idle condition.engine idle condition. –  –

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Oil pathOil pathPartsPartsRelate PartsRelate Parts
1 mg1 mg Camshaft inside oil pathCamshaft inside oil path
7.1 mg7.1 mg TOTALTOTAL1 mg1 mg Entrance of oil path (OCV ~ Camshaft)Entrance of oil path (OCV ~ Camshaft)2 mg2 mg Oil Filter ~ OCVOil Filter ~ OCV0.1 mg0.1 mg OCV Filter OCV Filter 1 mg1 mg OCVOCV
Max 0.4 mmMax 0.4 mm2 mg2 mg CVVTCVVTSize Size Foreign substance quantityForeign substance quantity (Max)(Max) –  –

35 35
①①Be cBe careareful not tful not t o o inflinflow ow tthe fohe fo reireiggn substn subst ance ance wwhilhile remove oe remove o r insr insttalall tl the Che CVVT VVT relrelatated ped partarts.s.
–CCVVVVT T AASSSS’’YY
–OCOCV V AASSSS,,YY
–OCV OCV FiFilltteerr
–OTOTSS(O(Oiil Tel Tempemperraatturure Se Seensnsoror))
–CaCammsshhaafft t ASASSS’’YY
–HHEEAD AD BBOLOLT T eettc.c.
②②BefoBefore rere reinsinsttalallilingng, y, you have ou have tto o wwasash thh the rele relatated ped partarts.s.
③③Wear tWear t he cohe co atated ged glloves ioves i nsnstteaead od of thf the ce cottotton gon glloves.oves. –  –

36 36
BOLTBOLT WASHERWASHERFILTERFILTER
AttentionAttention
Confirm problem of OCV Filter Confirm problem of OCV Filter ①①When OCV Filter was replaced, ensure tWhen OCV Filter was replaced, ensure t he cleanlinesshe cleanliness
– -PrevenPreven t that OCt that OC V LOCK by foV LOCK by fo reign mreign m ateriaateria l l
② ②When OCV Filter reassemble, replace theWhen OCV Filter reassemble, replace the Washer with new oneWasher with new one
– -remove tremove t he foreihe forei gn matergn mater ial by Air Gunial by Air Gun , and clean u, and clean u p by the etherp by the ether . .
DisassDisass emble the OCV Filteemble the OCV Filte r and check that foreign mater and check that foreign mate rials wererials were trappetrappe d. d.
– -If necessaIf necessa ry, replry, repl ace or clace or cl ean up bean up b y Air Guny Air Gun –  –

37 37
4. Auto Tensioner 4. Auto Tensioner 
Setting auSetting au to-tento-ten sionersioner beforbefor e installae installa tion on the cylintion on the cylin der headder head
①①ComprCompr ess aess a uto tuto tensionension ererto rto retracetrac t itt it
②②Insert the Stopper PinInsert the Stopper Pin
③③ Assemble the tensioner Assemble the tensioner to the cylinder headto the cylinder head Stopper PinStopper Pin
①①②② –  –

38 38
AssembleAssemble
Assemble camshaft andAssemble camshaft and
chain to head (caution : timingchain to head (caution : timing ) )Install Auto Tensioner as FigInstall Auto Tensioner as Fig
Assemble 2 boltsAssemble 2 bolts
(To(Torqurque 0.8 e 0.8 ~ 1.~ 1.0 kgf0 kgf m)m)Remove Stopper PinRemove Stopper PinAttentionAttention
① ①Keep the tighteningKeep the tightening
torquetorque
② ②TimingTiming
( Match the Timing Mark( Match the Timing Mark
of the Sprocket andof the Sprocket and
the Timing Chain)the Timing Chain) –  –

39 39
5. OTS (Oil Temperature Sensor)5. OTS (Oil Temperature Sensor)
The OTS located on the passage of the engine oil.The OTS located on the passage of the engine oil.
The CVVT is operated by the engine oil. The oilThe CVVT is operated by the engine oil. The oil
density is changed according to the its temperature . density is changed according to the its temperature .
The control signal of the OCV is compensated byThe control signal of the OCV is compensated by
ECM depending on OTS signal.ECM depending on OTS signal.
The OTS is required in order to measure theThe OTS is required in order to measure the
temperature and it use a NTC type resistor.temperature and it use a NTC type resistor. –  –

40 40
O OTSTS
GroundGroundSignalSignal
E EC CM M7 76 65 52 2
ResistanceResistanceTemperatureTemperature –  –

41 41
6. Timing Chain6. Timing Chain
①① Align the timing marks Align the timing marks
②②Install the Timing chain as figureInstall the Timing chain as figure
* * The timing The timing chain of CVVT chain of CVVT engine is different engine is different from currfrom curr ent Beta eent Beta e nginengine
which which is is not not equipped equipped CVVT CVVT system.system.
Vendor and chain pitch are differentVendor and chain pitch are different
T Timiiming ng M Marark k –  –

42 42
1) Start the engine at idle.1) Start the engine at idle.
2) Test 2 items as shown in the below table at the idle condition. 2) Test 2 items as shown in the below table at the idle condition.
3) If problems are found by above test, Check each parts as following order. 3) If problems are found by above test, Check each parts as following order.
Valve TimingValve Timing → →Sensor, ECU Output signalSensor, ECU Output signal → →CVVT ASS’YCVVT ASS’Y → →OCVOCV→ →OCV Filter OCV Filter 
* Refer to the parts inspection method in previous slides * Refer to the parts inspection method in previous slidesTo check the CVVTTo check the CVVT
movement tomovement to
advanced position.advanced position.Check the engineCheck the engine
vibration andvibration and
engine stop atengine stop at
engine idleengine idle
condition.condition.ConnectConnect
batterybattery
voltage to thevoltage to the
OCVOCV
connector.connector.2 2To check the CVVTTo check the CVVT
position at maximumposition at maximum
retarded.retarded.Check the engineCheck the engine
condition.condition.DisconnectDisconnect
the OCVthe OCV
connector.connector.1 1RemarkRemark TestTest ConditionCondition

43 43
CKP + CMP WaveformCKP + CMP Waveform
Idle condition, Maximum retardedIdle condition, Maximum retarded
CVVT operation can be checked by waveformCVVT operation can be checked by waveform
which is comparison between CKP and CMP.which is comparison between CKP and CMP.CVVT operation can be checked by waveformCVVT operation can be checked by waveform
which is comparison between CKP and CMP.which is comparison between CKP and CMP.

44 44
CKP + CMP WaveformCKP + CMP Waveform
Maximum advanced, Full load conditionMaximum advanced, Full load condition 1200RPM with load1200RPM with load
(Increasing load slowly)(Increasing load slowly)

45 45
Intake Valve Control Solenoid Circuit -Low(B1) (OCV ) Intake Valve Control Solenoid Circuit -Low(B1) (OCV ) P0076P0076Intake Valve Control Solenoid Circuit(B1) (OCV)Intake Valve Control Solenoid Circuit(B1) (OCV) P0075P0075
Intake Valve Control Solenoid Circuit -High(B1) (OC V) Intake Valve Control Solenoid Circuit -High(B1) (OC V) P0077P0077
Camshaft Position Sensor RangeCamshaft Position Sensor Range P0341P0341Engine Oil Temperature Sensor High InputEngine Oil Temperature Sensor High Input P0198P0198Engine Oil Temperature Sensor Low Engine Oil Temperature Sensor Low InputInput P0197P0197Engine Oil Temperature Sensor Engine Oil Temperature Sensor Range/PerformRange/Perform anceance P0196P0196Camshaft Position Actuator CircuitCamshaft Position Actuator Circuit P0010P0010DescriptionsDescriptions DTCDTC

46 46
Camshaft Position Actuator CircuitCamshaft Position Actuator Circuit P0010P0010
Camshaft is mis-aligned exceed 5 degree of CA from target position, Camshaft is mis-aligned exceed 5 degree of CA from target position,
when the CVVT is operating.when the CVVT is operating.
Example)Example)
1. 1.InsuffiInsuffi cient oil flcient oil fl ow such as cow such as c logginloggin g, stuck of Og, stuck of O CV, Oil leaCV, Oil lea kagekage
from CVVT assembly.from CVVT assembly.
2. Improper operation of CVVT assembly.2. Improper operation of CVVT assembly.
Camshaft Position Sensor RangeCamshaft Position Sensor Range P0341P0341
Camshaft position is mis-matched with crankshaft po sition, Camshaft position is mis-matched with crankshaft po sition,
when the CVVT is not operating (fully retarded posi tion). when the CVVT is not operating (fully retarded posi tion).
Example)Example)
1. 1.Mis-aMis-a ligned ligned the timthe tim ing belt ing belt or the tor the t iming ciming c hainhain
2. 2.DamagDamag ed CMed CM P or P or CKP sCKP s ensinensin g teeg tee th,th,
3. Wrong signal of CMP or CKP sensor 3. Wrong signal of CMP or CKP sensor

47 47
D De es sc cr ri pi pt ti oi on n U Un ni t i t
1 1 B BA AT TT TE ER RY YV VO OL LT TA AG GE E V V
3 3 C CO OO OLALAN NT TT TE EM MP P. .S SE EN NS SO OR R 。 。 C C
2 2 C CO OO OL LA AN NT TT TE EM MP P. .S SE EN NS SO OR R( (V V) ) m mV V X X
5 5 OOIILLTTEEMMPP..SSEENNSSOORR 。 。 CC
4 4 OOIIL TL T EEMMPP.. S SEENNSSOORR((VV) ) mmVV XX
7 7 I IN NT T. .A AI IR RT TE EM MP P. .S SN NS SR R 。 。 C C
6 6 I IN NT T. .A AI IR RT TE EM MP P. .S SN NS SR R( (V V) ) m mV V X X
9 9 T TH HR RO OT TT TLELE P. P.S SE EN NS SO OR R 。 。
8 8 T TH HR RO OT TT TL LE PE P . .S SE EN NS SO OR R( (V V) ) m mV V X X
1 10 0 A AD DA APTEPTE D DTHTHR RO OTTLETTLE 。 。 X X
1 11 1 G GR RA AN NK KI IN NG GS SI IG GN NA AL L O OF FF F/ O/ ON N
1 12 2 I ID DL LE ES ST TA AT TU US S O OF FF F/ /O ON N
1 13 3 P PA AR RT TL LO OA AD SD S T TA AT TU US S O OF FF F/ /O ON N X X
1 14 4 M MA AS SS SA AI IR FR F L LO OW W K Kg g/ /h h
1 16 6 V VE EH HI CI CL LE ES SP PE EE ED D K Km m/ /h h
1 17 7 E EN NG GI IN NE ES SP PE EE ED D r rp pm m
1 18 8 T TA AR RG GE ET TI DI DL LE ES SP PE EE ED D r rp pm m
1 19 9 T TR RA AN NS S. .R RA AN NG GE ES SW W P P, ,N N/ /D DR RI IV VE E
2 20 0 A A/ /C CS SW WI IT TC CH H O OF FF F/ /O ON NA Ap pp pl i cal i ca t ti o i on no on nH HI I- -S SC CA AN N
( (C Co om mp pa ar re ew wi t i th hH Hi – i -sca sca n nP PR RO O) ) N NO O. .I It te em m

48 48
2 21 1 A A/ /C PC P R RE ES SS SU UR RE ES SW W O OF FF F/ /O ON N X X
2 22 2 A A/ C/ C C CO OM MP P. R. RE EL LA AY Y O OF FF F/ O/ ON N
2 23 3 O OX XY YG GE EN NS SN NS SR R- B- B1 1/ S/ S1 1 m mV V
2 24 4 O OX XY YG GE EN NS SN NS SR R- -B B1 1/ /S S2 2 m mV V X X
2 25 5 I IG GN NI IT TI IO ON NT TI IM MI IN NG G 。 。
2 26 6 I NI NJ . DJ . D U UR RA AT TI OI ON N- -B B1 1 m mS S
2 27 7 A A/ /F FC CL LO OS SE ED DL LO OO OP P
2 28 8 L LO ON NE EF FU UE EL LT TR RI IM M- I D- I D L LE E m mS S
2 29 9 L LO ON NE EF FU UE EL LT TR RI IM M- P- P/ L / LO OA AD D % %
3 30 0 O O2 2S SN NS SR RH HE EA AT T. .D DU UT TY Y- -B B1 1/ /S S1 1 % %
3 31 1 O O2 2S SN NS SR RH HE EA AT T. D. DU UT TY Y- -B B1 1/ /S S2 2 % % X X
3 32 2 I ID DL LE ES SP PE EE ED DA AC CT TU UA AT TO OR RD DU UT TY Y % %
3 33 3 E EV VA AP P. .P PU UR RG GE EV VA AL LV VE ED DU UT TY Y % %
3 34 4 I GI GN NI TI TI OI ON ND DW WE EL LT TI MI ME E m mS S
335 5 CCAAMMSSHHAAFTFT POPOSSIITTIIOONN 。 。 CCRRK K  XX
336 6 CCAAMMSHSHAAFTFT POPOSISITITIOONN–TATARRGGETET 。 。 CCRRK K  XX
338 8 CCVVVVTTSSTTAATTUUSS
339 9 CCVVVVTTAACCTTUUAATITIOONNSSTATATUTUSS
446 6 CCVVVVTTDDUUTYTY CCOONNTRTROOLLSSTATATUTUSS
443 3 CCVVVVTTVVAALLVVEEDDUUTTYY %%

49 49
GF-I or aboveGF-I or above ILSACILSAC
SH or aboveSH or above API APISAESAEDomestic/EU/General(Include Middle East)/AustraliaDomestic/EU/General(Include Middle East)/Australia North AmericaNorth America
※ ※When usiWhen usi ng the hing the hi g gh vish visco cosi sity oil ty oil (15(15W40 W40 above)above) , ,
sometisometi mes CVVT mes CVVT wo would not operate at uld not operate at the coldthe cold
condition.condition.
We recWe rec ommend ommend 10 10W30 or lower viscoW30 or lower visco si sity oil.ty oil.

50 50 Models with CVVT systemModels with CVVT system
V6 3.0LV6 3.0LLEXUS RX300, ES300LEXUS RX300, ES300
New Previa etc.New Previa etc.
L6 L6 2.0L 2.0L LEXUS LEXUS IS200 IS200 etc.etc.
L6 L6 3.0L/2.5L 3.0L/2.5L CROWN(GDI)CROWN(GDI)TOYOTATOYOTA
L4 L4 1.O1.OL L Y YARIS ARIS etc.etc.VANEVANE
TYPETYPE
SUBASUBA RU RU H4 H4 2.0L/2.2.0L/2. 5L 5L LEGACY LEGACY etc.etc.
V8 V8 4.0L 4.0L LEXUS LEXUS LS400 LS400 etc.etc.
TOYOTATOYOTA
L4 L4 2.0l 2.0l CACARINA RINA etcetcHELICALHELICAL
TYPETYPE
JAJAGUAR GUAR V8 V8 4.0L 4.0L XK8 XK8 etcetc