TM-9-2815-220-34
ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED, 12-CYLINDER, ASSEMBLY; MODELS AVDS-1790-2C (2815-00-410-1203) AND AVDS-1790-2D (2815-00-410-1204)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
TM-9-2815-220-34 - Page 63 of 532
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TM 9-2815±220-34
Section II. TROUBLESHOO±²NG
2-7.
Purpose of T³o´bleshooµ¶·g
InformatiOn in th±s chapter ±s f²R usE OF D±rEct
SUppORt aNd GEnEral S³ppOrt maintEnancE pEr-
sONnel. ´t prOv±de ThE instR³cµiOns tO suppOrting
mainTEnancE pErsOnnEl ¶or cOrrEcTivE act±On·
a. Prevent DAm±gE²
¸pEraT±On O¹ a maLºuncTiOn»
±ng OR dEadlinEd vEhiclE OR EN¼inE w½ThOut a prE»
¾±minary exam±natiOn caN ca³sE ºurthEr damage tO
thE En¿ÀnE and pOssiblE ±njuÁy TO persOnne¾Â By
caREºul ±nspect±On aNd trOubleshOOt±ng, such dam-
agE and inJury caN bE avOidEdà ´n addiTiOnÄ ThE
cause Oº ºa³lty OpEraTiOn caN Oºten ÅE deTermiNed
WithOUt ExTEnsivE d±sassEmžyÆ
b³ PrecCMtions By InSp´µTfon¶
ÇhE inspEcTiOns arE
tO be peRFÈrmEd ÅEºÈre aTTEmpt±ng tO OpEraÉE The
VEH±cleÊ ËhEsE inspecTiOns arE mainly TO dETeÌÍinE
ThE cOndit±On aNd TO TakE prEca³t±Ons tO prEvEnt
FurthEr damagE.
·³ ¸roubl¹ºhoo»ing
While
¼O½¾¿ed.
ÇHE trOublE-
shOOTing pErformEd WH±lE tHe En¼inE ±s mOunTed ±n
thE vEHic¾E is incγdEd ±n th±s trOublEshOOt±ng sEc-
t±OnÏ ËhE prOcEd³Res ¹OR trOub¾EshOOTing vEh±c¾E
cOmpOnEnts and systEms rElaTEd TO Eng±nE OpEra-
t±On arE aÐsO ±ncludedÑ
d.
¸RoUbleÀhooÁÂng Ãngine
O
n
l
y
Ï ´º tHE En¼inE
Only ±s REcEivEdÒ iNspecTiOn shOu¾d Åe perºÈrmEd tO
vEriºy ThE d±agÓOsis madE WhilE tHE ENginE Was
ÔNÕÖAl¾Ed iN
the veHiclE. T±Is
iN
s
p
Ect
±
on
,
to
³
nco
v
²r
ºurtHEr dEºects Or TO dEtErmiNE ma¾ºunct±OnÒ is im-
pO×ØanT as ±t ±s thE Only mEans FÙr detErmin±ng thE
TrOublE Ú±thOut cOmpleTEÛy d±sassEmbliNg thE EnÜ
_
gÝne·
±-8.
Ge¸e³a¹ I·sº»¼cµ¶o·s
1³´s c±apµ²r conta¶ns ·¸Nspect¶on a¹ºd troubLeshoot-
´»g pRoc²Du¼Es to be pe
r
f
½
m
e
d WÞßlE a m
a
¾à
u
NCá
t´on¶nG ²n¾nE ´s sµ¶LL mou¿t²D
I
thE V²±ÀcÁE anD
aft²r jt ±aS B²En ¼²MoveD ÃÄose Proc²dUŲs whIch
aPpÆy oÇLY WIth the enGÈɲ o¼ PowEr pACk Êemov²D
FoË t±² v²±ÌcLE aÊe JnD¶ÍÎted ÏIt± t±² sYËboL*Ð
ÑÒe
PÓoceÔUÓes
Õ½e
p½²s²nÖ²d
âN
×ÕÓAG½ÕP±
2Ü9ã
ØroUÙLeÚhooµÛÉG Üroc²durEs, anD pÝÊAGÊaP±
2Ü10ã
D
¶AG
N
ost
±
C ÞEsßàá ØroUâlEãhooµ¶»g ärocåduæEs
Fr
I
ß
h
e
cl²çè
aIr
packAG²
éor
µ±e
m
ode
l
s
äåDæÜç7èéêëìäí
ANd
äîDæÜçïðñÜ2Dä
arE
pr²sEêëtEd
òN
ìíÕpt²r
²³
´µ¶·
T³o¼½leshooµ¶·g P³oced¾³¿s
A
TaÅle Oº cOnTeNTs ±s póÈvidEd ºOR th±s sectiOnô
õhEn a malºunct±On OccörsÒ ±t can bE rElaTEd tO a
spEci÷±c EnginEÒ cOmpONENT Or Engøne systEm ab-
NOrmal OpeRaT±On· ÇhE ±ndEx ±s sO c¾assiùEd tO as-
sist in lOcaT±Ng ThE apprOpriaTE trOUÅúEshOOtinû
itEmü PrObable causEs aRE l±sTEd f²r EacH ±tem· ýHE
causEs aRE l±sTEd ±n ORder Oº mOst ºREqUent OccURR-
Ence Or in lO¼øcal seQuEncE ÷Or EasE and timE Oº
accOmplishmenTÏ
þOrrecTive acTiOns arE lisTEÿ ĀÈr Each pRObablE
ca³se· ËHe aātiONs aRE ±N lO¼ica¾ sEĂuENcE ºOr acă
cOmplisHmEĄtÏ ąHEn dETai¾Ed ±nstrĆct±Ons aRE RE-
qu±REd tO accOmpćish tHE cOrrEct±VE act±OnĈ REĉ
ºErEnces arE madE tO tHE appROpRÝaTE tEchn±cal
manualÆ ąHEn d±a¼nOsTic tEsTing is necEssary bEá
f²rE ºina¾ cOrREctivE acTiON can be dEtERm±nEdĊ RE-
¹EreNce is made tO The apprOpċČatE diagÓOsTic tEsts
in tab¾E
¸¹º»
2²10.
D¶Ag¸osµ¶c Tesºs
Ëh±s sEctičN cOnta±ns diagnOst±c tEst dEsc×ÝpTiOns
WHich arE rEºEREncEd in tab¾E
¼½¼,
ËROĎžEshOOt±ng
PrOcEdurEsď ËhesE TEsts pROvidE aĄa¾ysis FOr ThE
purpOse OĀ dEtermin±ng ºurtheR cOrREct±ve act±On
rEquirEd TO El±minatE a maLºuncTičnÆ
A
tablE Oº
cOntEnTs ±s prOvidEd tO assist ±n lOcat±ng thE ReĐ
QuirEd diagnOst±c TEsTÏ
TrcmbleshoOti
n
PR±CEdu²eS
³onten´µ fO¶ ·abLe
2-±
ItEm
No.
Ma¸FwI¹tºO»1
1²
EngiNe FaIls to Crank
l·l
ENgin± wIll noT cRanK:
³´µ
S²aR³e´ µngAge¶ bu· µng¸Ne dOes N¹º »¼aN½¾
1¶3
STa¿Àe´ d¼Áve spIÂÃ, BUT engÄNµ DoŶ NoÆ »´an½Ç
¸¹
EngÁNe C¼anÈs Éoo SloW
µ´º
C´aNKing ¶Pµµd Too ¶low
!R
ÃTaÊT¸ËgÌ
3»
ÍngInµ fails To S²aÎÏ Ð² ÑOÊmal C¿an½iÒg SpeeD
¼½¾
ÓylInders No² Ô1;ng¾
¼¿¸
CylINdµRs PaR²IallY ÕÖ1×ØgÌ
4À
ÍngÁNµ LOW Ùdle ÐbÚOÎMal ÛPµ´a²ION
ÁÂÃ
LOÜ IDle sPeed Àoo loWÇ
Ä¿¸
LoW iDlµ sPµµD erRa·i»Ì
Ŷ3
ÝÞisßàRµs aT idlµÇ
5Æ
ángINe Hâgh Ùdle (ã¹ LäAd) åbnoRæal Ûçµ´a·âOè
ÇÈÉ
éIgh ÖDle ÃPeµD ÀOä êoWë
ÇÊË
éÖgh âDle sçeeD ²OO ìIghÇ
CHang ¾
2¿10À7
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