RAM 2500 Truck 4WD L6-5.9L DSL Turbo VIN 6 (1999)
Powertrain Control Module: Customer Interest
ECM - Poor Driveability/Hard Engine Restart
NUMBER: 18-15-00
GROUP: Vehicle Performance
DATE: Sept. 8, 2000
SUBJECT:
Driveability Enhancements With Winter Fuel Use And For Hard Hot Engine Restarts
0VERVIEW:
This bulletin involves selectively erasing and reprogramming the Cummins CM551 Engine Control Module (ECM) with new software (calibration
versions: 57T11A, 5711B, 56T13). There is no change to the JTEC PCM software.
MODELS:
1999 - 2001 (BR/BE) Ram Truck
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 5.9L-24V DIESEL ENGINE BUILT ON OR BETWEEN ENGINE SERIAL
NUMBERS 56478845 TO 56744082, WITH A DATE OF MANUFACTURE OF JULY 8, 1998 TO JUNE 29, 2000. THIS INFORMATION IS
AVAILABLE ON THE ENGINE DATA PLATE, WHICH IS LOCATED ON THE LEFT SIDE OF THE ENGINE, AFFIXED TO THE GEAR
HOUSING.
SYMPTOM/CONDITION:
The customer may complain of poor driveability when winter fuel is used to power the engine. The customer may complain of a no start or a hard hot
engine restart condition when using any type of good quality diesel fuel.
The poor driveability condition may occur only when either straight # 1 diesel fuel is used or when other special cold climate winter blend fuels are in
use.
The no start or long engine crank condition may occur when attempting to restart the engine while the temperature of the engine is still close to its
normal operating temperature. This hard hot restart condition may be experienced in all ambient climates, but may be more of a concern in warmer
ambient climates.
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS2) and or the Diagnostic Scan Tool (DRB III(R), with the appropriate Diagnostic Procedures Manual, verify
that all engine and transmission systems are functioning as designed. If Diagnostic Trouble Codes (DTC's) are present, record them on the repair order
and repair as necessary before proceeding further with this bulletin. If no DIC's are present, and the above symptom has been experienced, perform the
Repair Procedure.
NOTE:
WHENEVER AN ENGINE CONTROL MODULE (ECM) IS REPLACED DUE TO FAILURE, THE SOFTWARE OF THE REPLACEMENT
CONTROLLER MUST BE VERIFIED FOR THE LATEST REVISION LEVEL. USE THE FLASH PROCEDURE TO UPDATE REPLACED
CONTROLLERS AS NECESSARY.
PARTS REQUIRED:
EQUIPMENT REQUIRED:
NOTE:
THE MDS2 AND DRB III(R) ARE REQUIRED TO PERFORM PART OF THIS REPAIR. WHEN USING THE MDS2 AND THE DRB III(R),
THE SYSTEM MUST BE OPERATING AT CIS CD 2066 OR HIGHER.
