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14 - 34
FUEL SYSTEM—2.5L DIESEL ENGINE
DI AGN OSI S AN D T EST I N G (Cont inue d)
en gin e in on e of t h e t h r ee "lim p-in " m odes. Wh en t h e
P CM is oper a t in g in t h is m ode, a loss of power will
be pr esen t , a s if t h e t u r boch a r ger wa s n ot oper a t in g.
Th e best m et h od for dia gn osin g fa u lt s wit h t h e boost
pr essu r e sen sor is wit h t h e DRB III sca n t ool. D ia g -
n o s tic Tro u ble Co d e s : Refer t o On -Boa r d Dia gn os-
t ics in Gr ou p 25, E m ission Con t r ol Syst em for a list
of Dia gn ost ic Tr ou ble Codes (DTC's) for cer t a in fu el
syst em com pon en t s.
VEHICLE SPEED SENSOR TEST
To per for m a t est of t h e sen sor a n d it s r ela t ed cir-
cu it r y, r efer t o DRB sca n t ool.
D ia g n o s tic Tro u ble Co d e s : Refer t o On -Boa r d
Dia gn ost ics in Gr ou p 25, E m ission Con t r ol Syst em
for a list of Dia gn ost ic Tr ou ble Codes (DTC's) for cer-
t a in fu el syst em com pon en t s.
DIAGNOSTIC TROUBLE CODES
F or a list of Dia gn ost ic Tr ou ble Codes (DTC's),
r efer t o Gr ou p 25, E m ission Con t r ol Syst em for in for-
m a t ion . See On -Boa r d Dia gn ost ics.
REM OVAL AN D I N STALLAT I ON
ASD RELA Y
Th e ASD r ela y is loca t ed in t h e P DC. F or t h e loca -
t ion of t h e r ela y wit h in t h e P DC, r efer t o la bel on
P DC cover.
A/C CLUTCH RELA Y
Th e A/C clu t ch r ela y is loca t ed in t h e P DC. F or t h e
loca t ion of t h e r ela y wit h in t h e P DC, r efer t o la bel on
P DC cover.
ENGINE SPEED SENSOR
Th e en gin e speed sen sor is m ou n t ed t o t h e t r a n s-
m ission bellh ou sin g a t t h e r ea r of t h e en gin e block
(F ig. 21).
REMOVAL
(1) Discon n ect t h e h a r n ess (on t h e sen sor ) fr om
t h e m a in elect r ica l h a r n ess.
(2) Rem ove t h e sen sor m ou n t in g bolt s.
(3) Rem ove t h e sen sor.
INSTALLA TION
(1) In st a ll t h e sen sor flu sh a ga in st t h e open in g in
t h e t r a n sm ission h ou sin g.
(2) In st a ll a n d t igh t en t h e sen sor m ou n t in g bolt t o
19 N·m (14 ft . lbs.) t or qu e.
(3) Con n ect t h e elect r ica l con n ect or t o t h e sen sor.
Fig. 21 Engine Speed Sensor
ENGINE COOLANT TEMPERA TURE SENSOR
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.
REMOVAL
WARNING: HOT, PRESSURIZED COOLANT CAN
CAUSE INJURY BY SCALDING. COOLING SYSTEM
MUST BE PARTIALLY DRAINED BEFORE REMOV-
ING
THE
COOLANT
REFER TO GROUP 7, COOLING.
(1) P a r t ia lly dr a in coolin g syst em . Refer t o Gr ou p
7, Coolin g.
(2) Discon n ect elect r ica l con n ect or fr om sen sor.
(3) Rem ove sen sor fr om cylin der h ea d.
INSTALLA TION
(1) In st a ll a n ew copper ga sket t o sen sor.
(2) In st a ll sen sor t o cylin der h ea d.
(3) Tigh t en sen sor t o 18 N·m (13 ft . lbs.) t or qu e.
(4) Con n ect elect r ica l con n ect or t o sen sor.
(5) Repla ce a n y lost en gin e coola n t . Refer t o Gr ou p
7, Coolin g Syst em .
GLOW PLUGS
Th e glow plu gs a r e loca t ed a bove ea ch fu el in ject or
(F ig. 22). F ou r in dividu a l plu gs a r e u sed.
REMOVAL
(1) Discon n ect t h e n ega t ive ba t t er y ca ble a t t h e
ba t t er y.
(2) Clea n t h e a r ea a r ou n d t h e glow plu g wit h com -
pr essed a ir befor e r em ova l.
(3) Discon n ect elect r ica l con n ect or (F ig. 23) a t glow
plu g.
(4) Rem ove t h e glow plu g (F ig. 22) fr om cylin der
h ea d.
TEMPERATURE
SENSOR.
X J
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