LATCH AS 8Y4000 - Caterpillar

Caterpillar: Confidential Yellow
The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS8781" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use "T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.
Termination Date
October 31, 1997Problem
The software on certain 3508B, 3512B, and 3516B Marine, EPG, and Marine Auxiliary Engines needs to be updated. The new software will provide injector E-trim capability, control EMS and EMSII LEDs using engine monitoring system PIDs, correct reverse rotation engine backup speed timing sensor malfunction, add marine gear oil pressure temperature to engine monitoring system, provide capability to log events for all warnings, derates, and shutdowns, provide capability so that percent load displays on the EMSII and instantaneous fuel rate displays on pilot house EMS, and eliminate several nuisance diagnostics and flashing LEDs if so equipped. In addition, the CCM software must be replaced to communicate with the engine personality module software that has the injector E-trim feature.
Affected Product
Model & Identification Number
Group 1
3508B (2BM113-116 7SM28-39 , 7SM44-51)
3512B (7HM164-171 4TN39-70 )
3516B (8CN134-141 8KN68-90 )
Group 2
3508B (6PN161-221 4GM129-152 3DM81-83 )
3512B (8RM113-158 6WN76-103 8EM246 )
3516B (7RN210-393 6HN104-118 9AN103-107 )
Group 3
3508B (6PN162, 6PN163, 6PN169, 6PN183, 6PN184, 6PN190, 6PN198, 6PN212, 6PN219, 6PN221, 6PN222 7SM50 , 7SM51 2BM115 , 2BM116 3DM82 , 3DM83 4GM130 )
3512B (8RM122-124, 8RM140, 8RM151, 8RM152, 8RM155, 8RM156, 8RM160-163 4TN70 )
3516B (6HN104, 6HN105, 6HN113 7RN246 , 7RN261-264, 7RN266-278, 7RN280, 7RN281, 7RN287, 7RN297, 7RN308-310 , 7RN312-316, 7RN319, 7RN325, 7RN327-353, 7RN355-371, 7RN378-380 , 7RN385, 7RN386)
Parts Needed
Group 1
1 - 1310522 Control Group1 - 1325556 Film1 - 1346538 Film1 - 1356957 Control GroupReference the attached software tables in the rework procedure to determine the flash files and/or control groups needed.
Group 2
Reference the attached software tables in the rework procedure to determine the flash files and/or control groups needed.
Group 3
Subscription JERD2157 Update 6/25/96
Action Required
See the attached rework procedure.
Service Claim Allowances
Group 1
Group 2
Group 3
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.(1-Rework Procedure)Rework Procedure
Group 1
ECM Software Update
New ECM software will need to be installed, either by "FLASHING" new software into the primary and backup ECM's, or installing a new pre-programmed "CONTROL GROUP" into the primary and backup ECM's.
Update By Flashing
Identify the personality module part numbers by viewing the engine's ECM summary screen on the ET Service Tool. (Both primary and backup ECM) Cross Reference the personality module part numbers in Table to identify the new personality module part number flash files required to update your engine. Flash files may be downloaded from the "Corporate Mailbox"