THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)
THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)
1-14
1-14
P
Prro
ob
blle
em
m
C
Ca
au
us
se
e
C
Co
orrrre
ec
cttiio
on
n
10.
10. Cool
Coolant temper
ant tempera-
a-
ture above normal
ture above normal
(sudden overheat)
(sudden overheat)
(Continued)
(Continued)
8.
8. Def
Defecti
ective w
ve water
ater pump
pump..
9.
9. Defe
Defecti
ctive t
ve therm
hermosta
ostat.
t.
8.
8. Repl
Replace
ace wat
water
er pump
pump..
9.
9. Repl
Replace
ace ther
thermos
mostat.
tat.
10.
10. Contact a Cum
Contact a Cummins Author
mins Authorized
ized
Repair Facility.
Repair Facility.
11. Coolant tempera-
11. Coolant tempera-
ture below normal
ture below normal
1.
1. Elec
Electron
tronic fau
ic fault cod
lt codes are act
es are active
ive..
2.
2.
Cool
Coolant temper
ant temperature sensor mal-
ature sensor mal-
function.
function.
3.
3.
Engin
Engine operatin
e operating at low ambient
g at low ambient
temperature.
temperature.
4.
4. T
Temperatur
emperature gauge
e gauge malfunct
malfunction.
ion.
5.
5. Thermos
Thermostat is
tat is incorr
incorrect or
ect or malfunc-
malfunc-
tioning.
tioning.
1.
1. Re
Refer
fer to
to the
the
QSM11 Fault Code
QSM11 Fault Code
Information
Information
chart in this section.
chart in this section.
2.
2.
Check / clean
Check / clean sensor an
sensor and cool-
d cool-
ant passage.
ant passage.
3.
3.
4.
4. T
Test th
est the gauge and r
e gauge and replac
eplace if nec
e if nec--
essary.
essary.
5.
5. Chec
Check ther
k thermos
mostat and r
tat and repla
eplace if
ce if
necessary.
necessary.
6.
6. Cont
Contact a Cu
act a Cumm
mmins Au
ins Author
thorize
ized
d
Repair Facility.
Repair Facility.
12.
12. Engi
Engine acceler
ne accelera-
a-
tion or response is
tion or response is
poor
poor
1.
1. Elec
Electron
tronic faul
ic fault codes ar
t codes are acti
e active.
ve.
2.
2.
Engin
Engine operatin
e operating at low ambient
g at low ambient
temperature.
temperature.
3.
3. Air i
Air intak
ntake syst
e system or ex
em or exhaust s
haust sys-
ys-
tem leaks.
tem leaks.
4.
4. Fuel
Fuel grad
grade is no
e is not cor
t correc
rect or fu
t or fuel
el
quality is poor.
quality is poor.
1.
1. Re
Refer
fer to
to the
the
QSM11 Fault Code
QSM11 Fault Code
Information
Information
chart in this section.
chart in this section.
2.
2.
3.
3. Chec
Check for
k for loos
loose or dam
e or damaged pi
aged piping
ping
connections, and missing pipe
connections, and missing pipe
plugs.
plugs. Check t
Check the turbochar
he turbocharger and
ger and
exhaust manifold mounting (Refer
exhaust manifold mounting (Refer
to the Cummins Engine
to the Cummins Engine
Operation
Operation
and Maintenance Manual.
and Maintenance Manual.
4.
4. Oper
Operate the e
ate the engine f
ngine from a t
rom a tank of
ank of
high-quality fuel (refer to the
high-quality fuel (refer to the
Fuel
Fuel
and Lubricant Specifications
and Lubricant Specifications
in
in
the
the
Appendices
Appendices
))
..
5.
5. Cont
Contact a Cu
act a Cumm
mmins Au
ins Author
thorize
ized
d
Repair Facility.
Repair Facility.
13.
13. Engi
Engine decele
ne deceler-
r-
ates slowly
ates slowly
1.
1. Elec
Electron
tronic faul
ic fault codes ar
t codes are acti
e active.
ve.
2.
2. Acc
Acceler
elerator pe
ator pedal is
dal is sti
sticki
cking.
ng.
1.
1. Re
Refer
fer to
to the
the
QSM11 Fault Code
QSM11 Fault Code
Information
Information
chart in this section.
chart in this section.
2.
2. Check
Check for
for a sti
a sticking
cking acceler
accelerator
ator
pedal.
pedal.
3.
3. Cont
Contact a Cu
act a Cumm
mmins Au
ins Author
thorize
ized
d
Repair Facility.
Repair Facility.
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