Symptom List:
P 0115-ENGIN E COOLAN T TEMP S EN S OR CIRCU IT P LAU SIB ILITY
P 2012-ENGIN E COOLAN T TEMP S EN SOR CIRCU IT P LAU S IB ILITY
Te s t N o t e : Al l s y m p t o m s l i s t e d a b o v e a r e d i a g n o s e d u s i n g t h e s a m e t e s t s .
Th e title fo r th e te sts w ill be P 0115-EN GIN E COOLAN T TEMP
SENSOR CIRCUIT PLAUSIBILITY.
POSSIBLE CAUSES
ECT SENSOR
ECT SENSOR - COLD
ECT SENSOR - HOT
HGH RE SISTANCE IN E CT SE NSOR CIRCUITS
ENGINE COLD TOO LONG
TE S T ACTION AP PLICAB ILITY
1 Note: The best way to diagnose this DTC is to allow the vehicle to remain
outside overnight in order to have a completely cold soaked engine.
Note: Extremely cold outside ambient temperatures may cause this DTC to
set.
Ver ify t h a t th e coola nt level is cor r ect .
Star t t he engine.
Wit h th e DRBIII", set t he en gin e RP M t o 1500 an d a llow th e engin e to wa r m u p for
10-15 m in u t es.
Wit h th e DRBIII", mon it or th e E n gin e Coola n t Tem per a t u re va lu e du rin g th e wa r m
up cycle. Ma ke su r e th e tr a n sit ion of t emper a t u r e cha n ge is sm oot h .
Did t h e en gin e tem per a t u r e rea ch a minim u m of 80° C (176° F )?
All
Ye s → Go To 2
No → Refer t o th e Service In for m a t ion for coolin g syst em per for m a n ce
dia gnosis. Th e m ost proba ble ca u se is a Th er m osta t pr oblem .
Also, r efer t o a n y r ela t ed TSBs.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
2 NOTE: Th e e n g in e te m p e ra tu re m u s t be b e lo w 50°C (120°F ) fo r t h i s te s t.
NOTE: The thermostat must be operating correctly for this test to be valid.
Wit h th e DRBIII" in Sen sor s, r ea d a n d n ot e th e en gin e coola n t t em per a t u r e.
Usin g a t em pera t u r e pr obe, mea su r e th e en gin e block tem per a t u re nea r t h e ECT
Sen sor.
Are t h e rea din gs wit h in 7°C (13°F ) of ea ch ot h er ?
All
Ye s → Go To 3
No → Go To 4
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DRI V EABI LI T Y - DI ESEL
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