TE S T ACTION AP PLICAB ILITY
7 Tur n th e ign it ion off.
Rem ove a n d in spect t h e Air Filt er for soilin g or excessive dirt a n d debr is wh ich m a y
cau se air flow r est r ict ion .
Wer e an y of t h ese pr oblem s fou nd?
All
Ye s → Repla ce th e Air Filter elem en t .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Go To 8
8 NOTE: Inspect all air intake and turbocharger related tubes for damage,
re stric tio n o r p oor co nn ectio n. Any of th ese c on dition s c an c au se a th is DTC
to set.
NOTE:Inspect the exhaust system and related tubes for damage, restriction
or poor connection. Any of these conditions can cause a this DTC to set.
Tur n th e ign it ion off.
In spect t h e in t ak e system , exh a u st syst em an d r ela t ed t u bes a n d con nect ions.
Wer e an y pr oblem s fou n d?
All
Ye s → Repa ir or repla ce as n ecessa r y.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Go To 9
9 Tur n th e ign it ion off.
Rem ove t h e In t a ke Air Tem per a t u r e Sensor.
Con n ect sm oke m a ch in e 84-04 t o th e In t a ke Air Temper a t u r e Sen sor por t in t h e
in t a ke du ct an d begin in ject in g sm oke int o th e in t a ke syst em .
Obser ve all in t a ke syst em compon en t s for eviden ce of sm oke lea ka ge.
Is t h er e eviden ce of sm oke lea ka ge?
All
Ye s → Repa ir or repla ce as n ecessa r y.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Repla ce th e MAF Sensor.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
10 WAR N IN G: WHEN TH E EN GIN E IS OP ERATIN G, D O N OT STAN D IN A
DIR ECT LIN E WITH THE FAN . D O N OT P UT YOU R HAN D S NEAR THE
P ULLEYS , B ELTS OR FAN . D O NOT WEAR LOOS E CLOTHIN G.
NOTE: The conditions that set the DTC are not present at this time. The
fo ll o wi n g l is t ma y h e l p i n id en t i fy ing the i n t e rmi tt e nt c o nd i ti o n .
Wit h t h e en gin e r u n n in g a t n or m a l oper a t in g t em per a t u r e, m onit or t h e DRB
pa r a m et er s rela ted t o t h e DTC while wiggling th e wir ing ha r n ess. Look for pa r a m -
et er va lu es t o ch a n ge a n d/or a DTC to set .
Review t h e DTC Wh en Monit or ed a n d Set Con dit ion s. If possible, t r y to du plica t e t h e
condit ion s u n der wh ich t h e DTC wa s set .
Refer t o a n y Tech n ica l Service Bu llet in s (TSB) t h a t m a y a pply.
Visu a lly in spect t h e rela t ed wirin g h a r n ess. Look for a n y ch a fed, pier ced, pin ched, or
pa r t ia lly br oken wir es.
Visu a lly in spect t h e r ela t ed wir ing h a r n ess conn ect or s. Look for br oken , ben t , pu sh ed
out , or cor r oded t er m in a ls.
Wer e an y of t h e above condit ion s pr esen t ?
All
Ye s → Repa ir a s n ecessa ry.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Test Com plet e.
152
DRI V EABI LI T Y - DI ESEL
P 2066-MAS S AIR FLOW S EN SOR P LAU S IBILITY — Co n t in ued
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