O2 Sensor - Dodge Sprinter 2006 Manual

VA
Fig. 24 MANIFOLD AIR FLOW SENSOR
1 - WIRING HARNESS
2 - AIR INTAKE HOSE
3 - CLAMP
4 - MAF SENSOR
5 - AIR CLEANER HOUSING
INSTALLA TION
(1) P osit ion t h e MAF sen sor t o a ir clea n er h ou sin g
a n d in st a ll t h e r et a in in g scr ews (F ig. 24).
(2) Con n ect t h e a ir in t a ke h ose t o t h e MAF sen sor
a n d t igh t en cla m p.
(3) con n ect t h e MAF wir in g h a r n ess con n ect or.
(4) Con n ect n ega t ive ba t t er y ca ble.
O2 SEN SOR
DESCRIPTION
Th e wide ba n d oxygen sen sor m ea su r es t h e oxygen
con t en t in t h e exh a u st ga s t o m on it or E GR. Th e sen -
sor is m ou n t ed in t h e exh a u st pipe a t a 30 degr ee
a n gle t o pr even t t h e collect ion of m oist u r e bet ween
t h e sen sor h ou sin g a n d elem en t . Th e sen sor is
loca t ed close t o t h e t u r boch a r ger for a qu icker
r espon se t im e.
Th e oxygen sen sor h a s five wir es (h ea t er power
a n d gr ou n d, r efer en ce volt a ge, a n d 2 wir es for a
pu m p cell). Th e oxygen sen sor con n ect s t o a six wir e
h a r n ess con n ect or. A n on ser vicea ble t r im m in g r esis-
t or is bu ilt in t o t h e sen sor con n ect or. Th e r esist a n ce
is depen den t on t h e over a ll len gt h a n d t ype of sen -
sor.
OPERA TION
Th e O2 sen sor is a pla n a r zir con iu m dioxide (Zr O2)
du a l cell lim it in g cu r r en t pr obe wit h a in t egr a l
h ea t er. Th e t er m wide ba n , r efer s t o t h e a bilit y of t h e
O2 sen sor t o gen er a t e a clea r sign a l over a wide a ir-
fu el r a t io m ea su r in g r a n ge. As a du a l sen sor, it in cor-
por a t es a secon d O2 ch a m ber (oxygen pu m p cell),
wh ich r equ ir es a sepa r a t e volt a ge su pply.
Th e sen sor elem en t com bin es a sen sor cell (8) a n d
a n oxygen pu m p cell (9). Bot h cells a r e m a de of zir-
con iu m -dioxide (Zr O2) a n d a r e coa t ed wit h por ou s
pla t in u m elect r odes. Th e sen sor cell oper a t es ju st
like a t ypica l O2 sen sor. Th e oxygen pu m p cell t r a n s-
por t oxygen ion s wh en volt a ge is a pplied.
A ga s sa m ple ch a m ber (5) is sa n dwich ed bet ween
t h e oxygen pu m p cell a n d t h e sen sor cell. A pu m p
elect r ode a n d sen sor cell elect r ode a r e loca t ed in t h e
sa m ple ch a m ber. A sa m ple pa ssa ge (10) con n ect s t h e
sa m ple ch a m ber t o t h e su r r ou n din g exh a u st ga s. A
sen sor cell elect r ode is loca t ed in t h e r efer en ce a ir
ch a n n el (6), wh ich con n ect s t o t h e ou t side a ir (F ig.
25).
FUEL INJECTION 14 - 45