Specifications

Symptom List:
P2339-ECM CHECKSUM ERROR #1
P2339-ECM CHECKSUM ERROR #2
P2339-ECM INVALID CODING
P2339-ECM INVALID DATA
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P2339-ECM CHECKSUM ERROR
#1.
POSSIBLE CAUSES
ENGINE CONTROL MODULE
TEST ACTION APPLICABILITY
1 NOTE: This DTC indicates that an error occurred during ECM program-
ming.
Turn the ignition on.
With the DRBIIIt, erase ECM DTCs.
Refer to the Service Information and attempt to reprogram the ECM.
Perform several engine run cycles, turning the ignition off for at least 20 seconds
between each engine run cycle.
With the DRBIIIt, read the ECM DTCs.
Did this DTC set again?
All
Yes → Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No → Test Complete.
211
DRIVEABILITY - DIESEL