Jeep Cherokee 1999 Electronic Service Manual page 1251

14 - 8 FUEL SYSTEM—2.5L DIESEL ENGINE
DI AGN OSI S AN D T EST I N G (Cont inue d)
Fig. 10 MSA Location—Typical
Fig. 11 Glow Plug Connector
(9) Ver ify t h a t t h e F u el In ject ion P u m p elect r ica l
con n ect or is fir m ly con n ect ed. In spect t h e con n ect or
for cor r osion or da m a ged wir es. 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 (F ig. 13).
(10) Ver ify t h a t t h e fu el h ea t er elect r ica l con n ect or
is fir m ly a t t a ch ed t o t h e filt er bowl a t t h e bot t om of
t h e fu el filt er /wa t er sepa r a t or. In spect t h e con n ect or
for cor r osion or da m a ged wir es.
(11) Ver ify t h a t t h e elect r ica l pigt a il con n ect or
(sen sor con n ect or ) (F ig. 14) for t h e fu el in ject or sen -
sor is fir m ly con n ect ed t o t h e en gin e wir in g h a r n ess.
In spect t h e con n ect or for cor r osion or da m a ged wir es.
Th is sen sor is u sed on t h e #1 cylin der in ject or on ly.
(12) In spect for exh a u st syst em r est r ict ion s su ch
a s pin ch ed exh a u st pipes or a colla psed or plu gged
m u ffler.
(13) Ver ify t h a t t h e h a r n ess con n ect or is fir m ly
con n ect ed t o t h e veh icle speed sen sor (F ig. 15) or
(F ig. 16).
Fig. 12 Glow Plug Relay Location
Fig. 13 Fuel Shutdown Solenoid Location
(14) Ver ify t u r boch a r ger
Refer t o Gr ou p 11, E xh a u st Syst em a n d In t a ke Ma n -
ifold Gr ou p for in for m a t ion .
(15) Ver ify t h a t t h e h a r n ess con n ect or is fir m ly
con n ect ed t o t h e en gin e coola n t t em per a t u r e sen sor.
Th e sen sor is loca t ed on t h e side of cylin der h ea d
n ea r t h e r ea r of fu el in ject ion pu m p (F ig. 17).
(16) Ch eck for a ir in t h e fu el syst em . Refer t o t h e
Air Bleed P r ocedu r e.
(17) In spect a ll fu el su pply a n d r et u r n lin es for
sign s of lea ka ge.
X J
wa st ega t e oper a t ion .