P0128-Thermostat Rationality - Chrysler Sebring 2005 Service Manual

S y m p to m :
P 0128-THERMOS TAT RATION ALITY
Wh e n Mo n ito re d a n d S e t Co n d itio n :
P 0128-THERMOS TAT RATION ALITY
Wh en Mon it or ed: Th e en gin e r u n n in g. Du r in g cold st a r t .
Set Con dit ion : Th e P CM pr edict s a coola n t t em per a t u r e va lu e t h a t it will com pa r e t o t h e
a ct u a l coola n t t em per a t u r e. If t h e t wo coola n t t em per a t u r e va lu es a r e n ot wit h in 10°C
(50°F ) of ea ch ot h er a n er r or is det ect ed. Two Tr ip F a u lt .
GOOD TRIP E QUAL TO ZE RO
LOW COOLANT LE VE L
OTH E R P OSSIBLE CAUSE S
SIGNAL CIRCUIT SH ORTE D TO BATTE RY VOLTAGE
MONITOR E NGINE COOLANT TE MP E RATURE
TE MP E RATURE SE NSOR VOLTAGE BE LOW 1.0 VOLT
SIGNAL CIRCUIT OP E N
SE NSOR GROUND CIRCUIT OP E N
SIGNAL CIRCUIT SH ORTE D TO GROUND
SIGNAL CIRCUIT SH ORTE D TO SE NSOR GROUND
P CM LOW
P CM H IGH
TES T
1 N OTE: If a n y ECT, AAT, CMP o r CKP s e n s o r D TCs h a v e s e t a lo n g w ith P 0128,
d ia g n o s e th e m firs t be fo re c o n tin u in g .
N OTE: En s u re th a t P in io n F a c to r h a s be e n p ro g ra m m e d c o rre c tly in to th e
P CM.
Ign it ion on , en gin e n ot r u n n in g.
Wit h t h e DRBIII , r ea d DTCs a n d r ecor d t h e r ela t ed F r eeze F r a m e da t a .
Is t h e Good Tr ip displa yed a n d equ a l t o zer o?
Yes
No
P OS S IB LE CAU S ES
ACTION
→ Go To 2
→ Refer t o t h e INTE RMITTE NT CONDITION sym pt om in t h e
Dr ivea bilit y ca t egor y.
P er for m P OWE RTRAIN VE RIF ICATION TE ST VE R - 5.
DRI V EABI LI T Y - N GC
83
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