TE S T ACTION AP PLICAB ILITY
1 NOTE: If DTC P1611, P2306 or P2332 is present with this DTC, diagnose
DTCs P1611, P2306 or P2332 before diagnosing this DTC.
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: If the ECM detects and stores a DTC, the ECM also stores the
e n gi n e /ve h ic le o p e ra ti n g c o n d i tio n s u n d e r w h ic h th e D TC w a s s e t. S o m e o f
these conditions are displayed on the DRB at the same time the DTC is
displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to
duplicate these conditions may assist when checking for an active DTC.
Tur n th e ign it ion on .
Wit h th e DRBIII",erasetheECMDTCs.
Test drive th e veh icle.
Wit h th e DRBIII",readtheECMDTCs.
Does t h e DRB III displa y a Ma ss Air F low Sen sor DTC?
All
Ye s → Go To 2
No → Go To 16
2 NOTE: Check the ECM for other ECM DTC’s related to circuits that are
open, shorted to ground or low voltage problems.
Does t h e DRB a lso displa y t h ese type of DTC’s?
All
Ye s → Go To 3
No → Go To 4
3 Tur n th e ign it ion off.
Discon n ect t he E CM ha r n ess con n ect or s.
Tur n th e ign it ion on .
Con n ect a ju mper wir e bet ween gr ou n d a n d t h e E n gin e Con t r ol Rela y Sign al circu it
in ECM C2 h a r ness con n ect or cavit y 44.
Usin g a 12-volt test ligh t con n ect ed to grou n d, ch eck th e Fu sed En gin e Con t r ol Rela y
Ou t pu t cir cuit s a t th e ECM C1 h a rn ess con n ect or cavit ies 1, 3 an d 5.
Does t h e test ligh t illu min a t e br igh t ly for ea ch circu it?
All
Ye s → Go To 4
No → Refer to sym pt om list a nd per for m Ch eckin g th e E CM Power an d
Gr ou n ds.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
4 NOTE: A malfunctioning EGR system can cause this DTC to set. Refer to
symptom Checking the EGR System in the Driveability category to check
EGR system operation.
Tur n th e ign it ion off.
Discon n ect t he MAF Sen sor h a r n ess con n ect or.
Tur n th e ign it ion on .
Mea su r e th e volt a ge of t h e MAF Sen sor 5 Volt Su pply cir cu it in MAF Sen sor ha r n ess
conn ect or.
Is t h e volt a ge bet ween 4.8 a n d 5.2 volt s?
All
Ye s → Go To 5
No → Go To 12
21
DRI V EABI LI T Y - DI ESEL
P 0100-MAS S AIR F LOW S EN SOR S IGN AL VOLTAGE TOO LOW —
Co n t in ued