Symptom List:
P 2333-S /C VEHICLE SP EED P LAU S IB ILITY
P 2338-S /C EXCESS IVE ACCELERATION
P 2338-S /C EXCESS IVE DECELERATION
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 s ts w ill be P 2333-S /C VEHICLE SP EED
PLAUSIBILITY.
POSSIBLE CAUSES
BRAKE SWITCH VE RIF ICATION
CAB DTCS
OP E N CAN BUS CIRCUITS
VERIF Y CAB COMMUNICATION
WH E EL SP E E D VE RIFICATION
INTERMITTENT CONDITION
TE S T ACTION AP PLICAB ILITY
1 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.
Wit h th e DRBIII",eraseECMDTCs.
Test drive th e veh icle an d a t t em pt to du plica t e th e pr oblem .
Wit h th e DRB, r ea d E CM DTC’s.
Did t h is DTC set a ga in ?
All
Ye s → Go To 2
No → Go To 7
2 Tur n th e ign it ion on .
Wit h th e DRBIII" a t t em pt t o com m u n ica t e wit h t h e CAB.
NOTE: If there are other DTCs set with this DTC, refer to the Symptom List
and repair other stored ECM DTCs before diagnosing this DTC.
Is t h e CAB comm u n ica t ing wit h t h e DRB?
All
Ye s → Go To 3
No → Refer t o th e appr opr ia t e sym ptom in t h e Body Dia gn ost ic In for-
ma t ion.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
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DRI V EABI LI T Y - DI ESEL