Fuel Temperature Sensor; Intake Air Temperature Sensor - Dodge Sprinter 2006 Manual

14 - 42 FUEL INJECTION
• Tigh t en t h e n u t t o 60 N·m (44 ft . lbs.)
• Loosen t h e n u t 90 degr ees.
• Ret igh t en t h e n u t t o 80 N·m (59 ft . lbs.).
(3) In st a ll fu el r a il (Refer t o 14 - F UE L SYSTE M/
F UE L INJ E CTION/F UE L INJ E CTOR - INSTALLA-
TION).
(4) Con n ect n ega t ive ba t t er y ca ble.
(5) St a r t en gin e, a llow t o wa r m , t u r n en gin e off
a n d in spect for lea ks (Refer t o 14 - F UE L SYSTE M -
DIAGNOSIS AND TE STING).
FU EL T EM PERAT U RE SEN SOR
DESCRIPTION
Th e fu el t em per a t u r e sen sor is in t egr a t ed in t h e
h igh pr essu r e fu el pu m p n ext t o t h e fu el qu a n t it y
va lve. Th e sen sor det ect s t h e t em per a t u r e of t h e fu el
a n d su pplies t h a t in for m a t ion t o t h e E CM. Th e sen -
sor r a n ges fr om - 40°F (- 40C) t o 284°F (140°C). If
t h e en gin e is cold, t h e a ct u a l va lu e sen t will r ea d
a m bien t t em per a t u r e. Th e va lu e r ises a ft er t h e
en gin e h a s been st a r t ed.
OPERA TION
An n ega t ive t em per a t u r e coefficien t (NTC) r esist or
in t egr a t ed in t h e fu el t em per a t u r e sen sor a lt er s it 's
elect r ica l r esist a n ce in lin e wit h t h e fu el t em per a t u r e
(t h e r esist a n ce dr ops a s t h e t em per a t u r e r ises). Th e
E CM u ses t h is r ea din g t o ca lcu la t e opt im u m en gin e
per for m a n ce u n der a ll dr ivin g con dit ion s. If t h e fu el
is t o wa r m , t h e r a il pr essu r e in t h e syst em is low-
er ed. Th e con t r oller qu a n t it y of t h e pr essu r e r egu la t -
in g va lve is r edu ced a n d t h e fu el t em per a t u r e is
lower ed.
REMOVAL
NOTE: Capture and properly store all fluid seepage
in appropriately marked containers.
(1) Discon n ect t h e n ega t ive ba t t er y ca ble.
(2) Rem ove t h e fu el t em per a t u r e sen sor fr om t h e
h igh pr essu r e pu m p (F ig. 19).
Fig. 19 HIGH PRESSURE FUEL PUMP
1 - HIGH PRESSURE PUMP
2 - FUEL SUPPY TO FUEL RAIL
3 - FUEL SUPPLY LINE
4 - FUEL RETURN LINE

5 - FUEL TEMPERATURE SENSOR

6 - FUEL QUANTITY CONTROL VALVE
7 - OIL LEVEL INDICATOR
8 - VACUUM PUMP
INSTALLA TION
(1) Clea n sea lin g su r fa ces.
(2) In st a ll n ew sea l on sen sor.
(3) Scr ew t h e sen sor in t o t h e h igh pr essu r e pu m p
a n d t igh t en t o 18 lbs.ft . (25 N·m ) (F ig. 19)
(4) Con n ect n ega t ive ba t t er y ca ble.
(5) St a r t en gin e, a llow t o wa r m , sh u t en gin e off
a n d in spect for lea ks (Refer t o 14 - F UE L SYSTE M/
F UE L INJ E CTION - WARNING).
I N TAK E AI R T EM PERAT U RE
SEN SOR
DESCRIPTION
Th e in t a ke a ir t em per a t u r e sen sor is loca t ed
bet ween t h e ch a r ge a ir pipe a n d t h e ch a r ge a ir dis-
t r ibu t ion of t h e cylin der s. Th e in t a ke a ir t em per a t u r e
sen sor m ea su r es t h e t em per a t u r e of t h e a ir a s it is
su pplied t o t h e cylin der s a n d t r a n sm it s t h e va lu e t o
t h e E CM. Th is is r equ ir ed in or der t o det er m in e t h e
den sit y of t h e a ir bein g su pplied for t h e com bu st ion
pr ocess. Th e va lu e r a n ge is fr om m in u s 40°F u p t o
302°F (m in u s 40°C t o 150°C).
VA