Jeep Cherokee 1999, Electronic Service Manual

Page: 1244 / 1948

FUEL SYSTEM—2.5L DIESEL ENGINE
CON T EN T S
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FUEL DELIVERY SYSTEM—
2.5L DIESEL ENGINE . . . . . . . . . . . . . . . . . . . . . 2
FUEL INJECTION SYSTEM—
2.5L DIESEL ENGINE . . . . . . . . . . . . . . . . . . . . 23
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 1
GEN ERAL I N FORM AT I ON
INDEX
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GENERAL INFORMATION
FUEL REQUIREMENTS—2.5L DIESEL . . . . . . . . . 1
FUEL SHUTDOWN SOLENOID . . . . . . . . . . . . . . 1
GEN ERAL I N FORM AT I ON
FUEL SHUTDOWN SOLENOID
Th e fu e l s h u td o w n s o le n o id is c o n tro lle d a n d
o p e ra te d by th e MS A.
Th e fu el sh u t down (sh u t -off) solen oid is u sed t o
elect r ica lly sh u t off t h e diesel fu el su pply t o t h e h igh -
pr essu r e
fu el in ject ion pu m p. Th e solen oid is
m ou n t ed t o t h e r ea r of t h e in ject ion pu m p.
Th e solen oid con t r ols st a r t in g a n d st oppin g of t h e
en gin e r ega r dless of t h e posit ion of t h e a cceler a t or
peda l. Wh en t h e ign it ion (key) swit ch is OF F, t h e
solen oid is sh u t off a n d fu el flow is n ot a llowed t o t h e
fu el in ject ion pu m p. Wh en t h e key is pla ced in t h e
ON or START posit ion s, fu el su pply is a llowed a t t h e
in ject ion pu m p.
FUEL REQUIREMENTS—2.5L DIESEL
P r em iu m qu a lit y diesel fu el wit h a m in im u m Cet -
a n e r a t in g of 50 or h igh er is r equ ir ed.
X J FUEL SYSTEM—2.5L DIESEL ENGINE 14 - 1