Jeep Cherokee 1999 Electronic Service Manual page 1239

14 - 48 FUEL SYSTEM
REM OVAL AN D I N STALLAT I ON (Cont inue d)
Fig. 51 PCM Mounting
(2) Rem ove cover over elect r ica l con n ect or s. Cover
sn a ps on t o P CM.
(3) Ca r efu lly u n plu g t h e t h r ee 32–wa y con n ect or s
(F ig. 51) fr om P CM.
(4) Rem ove t h r ee P CM m ou n t in g bolt s a n d r em ove
P CM fr om veh icle.
INSTALLA TION
(1) In st a ll P CM a n d m ou n t in g bolt s t o veh icle.
(2) Tigh t en bolt s t o 4 N·m (35 in . lbs.).
(3) Ch eck pin con n ect or s in t h e P CM a n d t h e t h r ee
32–wa y con n ect or s for cor r osion or da m a ge. Also, t h e
pin h eigh t s in con n ect or s sh ou ld a ll be sa m e. Repa ir
a s n ecessa r y befor e in st a llin g con n ect or s.
(4) In st a ll t h r ee 32–wa y con n ect or s.
(5) In st a ll cover over elect r ica l con n ect or s. Cover
sn a ps on t o P CM.
(6) In st a ll ba t t er y ca ble.
(7) Use t h e DRB sca n t ool t o r epr ogr a m n ew P CM
wit h veh icles or igin a l Iden t ifica t ion Nu m ber (VIN)
a n d or igin a l veh icle m ilea ge.
POWER STEERING PRESSURE SWITCH—2.5L
ENGINE
Th is swit ch is n ot u sed wit h 4.0L six-cylin der
en gin es.
Th e power st eer in g pr essu r e swit ch is in st a lled in
t h e power st eer in g h igh -pr essu r e h ose (F ig. 52).
REMOVAL
(1) Discon n ect elect r ica l con n ect or fr om power
st eer in g pr essu r e swit ch .
Fig. 52 Power Steering Pressure Switch
(2) P la ce a sm a ll con t a in er or sh op t owel ben ea t h
swit ch t o collect a n y excess flu id.
(3) Rem ove swit ch . Use ba ck-u p wr en ch on power
st eer in g lin e t o pr even t lin e ben din g.
INSTALLA TION
(1) In st a ll power st eer in g swit ch in t o power st eer-
in g lin e.
(2) Tigh t en t o 14–22 N·m (124–195 in . lbs.) t or qu e.
(3) Con n ect elect r ica l con n ect or t o swit ch .
(4) Ch eck power st eer in g flu id a n d a dd a s n eces-
sa r y.
(5) St a r t en gin e a n d a ga in ch eck power st eer in g
flu id. Add flu id if n ecessa r y.
OXYGEN SENSOR
Th e u pst r ea m O2S sen sor is loca t ed in exh a u st
down pipe. Th e down st r ea m sen sor is loca t ed n ea r
ou t let en d of ca t a lyt ic con ver t er. Refer t o (F ig. 53).
Fig. 53 Oxygen Sensor Locations
X J