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Date: May 28, 1999
This bulletin involves selectively erasing and reprograming the Cummins ECM with new software ( calibration changes 98cal17 & 99calT8B). There is no change to the JTEC PCM software.
Models: 1998 - 1999 (BR/BE) Ram Trucks
NOTE: This information applies to vehicles equipped with a 5.9 - 24V diesel engine built before engine serial # 56587297 with a date of engine manufacture of may 5, 1999. This information is available on the engine data plate located on the left side of the engine.
There may be a condition of low power or slow acceleration when towing or when hauling a heavy load. This software change, to the Cummins CM551 diesel engine controller, will increase engine torque.
Some 1998 BR/BE vehicles equipped with a 5.9L - 24V diesel may already have the latest software revision. Verify that the ECM is at calibration level 98T17 (p/n 333034303J / 333035303J / 333036303J / 333037303J). If the calibration level is 98T17, then this TSB does not apply and further power train diagnosis may be required.
Using the Mopar Diagnosis System (MDS/MDS2) and or the Diagnosis scan tool (DRBIII) with the appropriate Diagnosis Procedures Manual, verify all engine/ transmission systems are functioning as designed. If Diagnosis Trouble Codes (DTC's) are present, record them on the repair order and repair as necessary before proceeding further with this bulletin. If no DTC's are present, and the above symptoms have been experienced, perform the repair procedure.
NOTE: Whenever a 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 updated replaced controllers as necessary.
NOTE: The MDS1/MDS2 and DRB III are required to perform part of this repair. If using the MDS1 and DRB III the MDS must be operating with release 21 or higher AND TIL CD RELEASE 1184 or higher must be installed. If using the MDS2 and the DRB III the system must be operating at CIS CD2034 or higher.
This Procedure involves selectively erasing and reprogramming the ECM with new software.
MDS 1 PROCEDURE:
|10. Type or print necessary info on the "Authorized Software Update" label PN 04669020 (Fig 1). Attach the label to the CM551 ECM, which is located on left side of the engine behind the fuel filter/water separator. Cover the label with clear plastic overlay.|
11. Type or print the following information on the Authorized Modification Label p/n 04275086 and attach the label near the VECI label (Fig 2).
Policy: Reimbursable within the terms of the warranty.
Labor Operation No: 08-19-43-90 ............................. 0.5 Hrs.
Failure Code: FM -- Flash Module
Subject: Re: [TD] TSB 18-11-99 and RV software
Date: Wed, 09 Jun 1999 09:24:48 -0700
From: Josh Berman
To: TurboDiesel mailing list
> I wonder what the Torque is changed to with this new program? The
> TSB says it incresses torque but is it 5 lbs or 50 lbs?
RV calibrations won't work in a 24-valve (ISB) in a Dodge because they use different ECMs. The Dodge ECM has 50 pins (in 1 plug) while the RV ECM has 100 pins (in 2 plugs). Also, the RV calibrations do not have the Dodge-specific software which sends the Dodge chassis computer the info needed to drive some dash gauges (such as temperature and tachometer).
As far as TSB 18-11-99 goes, it covers different calibrations for "98" and "99" trucks.
The calibration for '98 trucks has actually been available at Dodge dealers since March '99. If you have had your '98 truck re-flashed for any reason since March '99 (such as the 799 reflash, the 8001 reflash, etc...), it should have been loaded with this latest calibration. If you had your truck reflashed PRIOR to March '99, you should be eligible for the new cal.
The calibration for '99 trucks has not been released before now.
As I understand, neither calibration increases power or torque above the advertised spec, but the calibrations have been optimized (or "recentered" as we usually say) to deliver power and torque that is at the "top" of the "manufacturing variability" spec.
> When I had the 8001 Recall performed, did they reprogram the
> Cummins CM551 engine controller?
The 799 and 8001 reflash did reprogram the Cummins CM551.
I hope this helps!
-Josh Berman MidRange Service Cummins Engine Company - Columbus, IN
Joshua Berman MidRange Service Cummins Engine Company
firstname.lastname@example.org Cummins Homepage: www.cummins.com
Subject: [TD] TSB 18-11-99 Reflash/Results
Date: Fri, 11 Jun 1999 09:46:36 -0700
From: David Wilkinson
To: TurboDiesel, DiRT
Had the TSB 18-11-99 done yesterday on the way home from the office. Allen Samuels Dodge at I-45 S & 610 for you Houston folks. (1 hr. total time)
Results: Much quieter and smoother idling. It used to sound like the pistons and valves were smacking each other before the reflash; however, I know this was not the case.
45-80 tests were basically unchanged, 23 seconds dropped to 22.5. 1500-3000 rpm in 4th dropped from 15 seconds to 13.8-14. I performed all of these tests on the same road as before.
For those that have not heard of the 1500-3000 test, Another list member runs
it because it seems to be more consistent. He also has a formula to compute
Will I buy a TST upgrade? YES, when I can afford it but not before a genuine, Cummins dyno test.
Dave in Houston
99 QC 2500 4X4, ISB/5spd, 3.54/Lsd, Driftwood/Agate 285/75/16 Bridgestone MT's, Husky Liners. 17.3 avg mpg 11K
Thanks to George Rudy for supplying this TSB information
This page was edited on: May 3, 2004