Jeep Cherokee 1999 Electronic Service Manual page 1236

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DI AGN OSI S AN D T EST I N G (Cont inue d)
Fig. 42 Install Orifice Tool 4.0L 6–Cylinder Engine
(10) Rem ove or ifice t ool a n d con n ect CCV t u be t o
en gin e.
(11) In st a ll a ir du ct t o t h r ot t le body.
REM OVAL AN D I N STALLAT I ON
AUTOMA TIC SHUTDOWN (ASD) RELA Y
Th e ASD r ela y is loca t ed in t h e P ower Dist r ibu t ion
Cen t er (P DC) (F ig. 43). Refer t o la bel on P DC cover
for r ela y loca t ion .
REMOVAL
(1) Rem ove P DC cover.
(2) Rem ove r ela y fr om P DC.
(3) Ch eck con dit ion of r ela y t er m in a ls a n d P DC
con n ect or t er m in a ls for da m a ge or cor r osion . Repa ir
if n ecessa r y befor e in st a llin g r ela y.
(4) Ch eck for pin h eigh t (pin h eigh t sh ou ld be t h e
sa m e for a ll t er m in a ls wit h in t h e P DC con n ect or ).
Repa ir if n ecessa r y befor e in st a llin g r ela y.
INSTALLA TION
(1) In st a ll r ela y t o P DC.
(2) In st a ll cover t o P DC.
FUEL PUMP RELA Y
Th e fu el pu m p r ela y is loca t ed in t h e P ower Dist r i-
bu t ion Cen t er (P DC) (F ig. 43). Refer t o la bel on P DC
cover for r ela y loca t ion .
Fig. 43 Power Distribution Center (PDC)
REMOVAL
(1) Rem ove P DC cover.
(2) Rem ove r ela y fr om P DC.
(3) Ch eck con dit ion of r ela y t er m in a ls a n d P DC
con n ect or t er m in a ls for da m a ge or cor r osion . Repa ir
if n ecessa r y befor e in st a llin g r ela y.
(4) Ch eck for pin h eigh t (pin h eigh t sh ou ld be t h e
sa m e for a ll t er m in a ls wit h in t h e P DC con n ect or ).
Repa ir if n ecessa r y befor e in st a llin g r ela y.
INSTALLA TION
(1) In st a ll r ela y t o P DC.
(2) In st a ll cover t o P DC.
THROTTLE BODY
A (fa ct or y a dju st ed) set scr ew is u sed t o m ech a n i-
ca lly lim it t h e posit ion of t h e t h r ot t le body t h r ot t le
pla t e. N e v e r a tte m p t to a d ju s t th e e n g in e id le
s p e e d u s in g th is s c re w. All idle speed fu n ct ion s a r e
con t r olled by t h e P ower t r a in Con t r ol Modu le (P CM).
REMOVAL
(1) Rem ove a ir clea n er t u be a t t h r ot t le body.
(2) Discon n ect t h r ot t le body elect r ica l con n ect or s
a t MAP sen sor, IAC m ot or a n d TP S (F ig. 44) or (F ig.
45).
(3) Rem ove a ll con t r ol ca bles fr om t h r ot t le body
(lever ) a r m . Refer t o t h e Acceler a t or P eda l a n d Th r ot -
t le Ca ble sect ion of t h is gr ou p for a ddit ion a l in for m a -
t ion .
(4) Rem ove fou r t h r ot t le body m ou n t in g bolt s.
(5) Rem ove t h r ot t le body fr om in t a ke m a n ifold.
FUEL SYSTEM 14 - 45