1992/07/27 Caterpillar

New Engine Control Module For EMCP Now Available{4450,4490}

Usage:

All Generator Sets Equipped With EMCP

Reference: Service Manuals: SENR3535 "Electronic Modular Control Panel (EMCP)"

Reference: SENR3903 "Electronic Modular Control Panel (SR-4 Generator Mounted)"

Reference: SENR5226 "Electronic Modular Control Panel (EMCP) For Rental Generator Sets"

Reference: Service Magazine: "Unwanted Engine Shutdown Caused by "01" And/Or "04" Diagnostic; New "09" Diagnostic Available with 8T9881-8 Electronic Control Module (ECM)", May 13, 1991 and "Trouble Shooting 04 Diagnostic Code On Electronic Modular Control Panels", May 11, 1992

A new Engine Control Module (ECM) is now available for the Electronic Modular Control Panel (EMCP). The 8T9881 Control Group has been replaced by a 6V6153 Control Group. Service procedures for the 8T9881 Control Group still apply as shown in the referenced Service Manuals and Service Magazine Articles. If these procedures fail to resolve the problem, the 8T9881 Control Group should be replaced with the 6V6153 Control Group. A 7C9129 Film "ECM" will be required if the film is being replaced on the face of the ECM.

Improvements to the 6V6153 Control Group include the following:

1. The CPU circuit board was redesigned to introduce a ground plane for greater noise immunity.

2. The processor reset circuit is improved for high frequency conducted noise on the battery lines and for low battery voltage.

3. There is improved memory mapping of the EE PROM (non-volatile memory). It is now more difficult to scramble the memory.

Caterpillar Information System:

1992/07/27 New Strap-Cable Used In Fastener Group{7553}

1992/07/20 New Ways To Use The 6V2100 Multitach{0775,0781,0785}

1992/07/20 Clutch (PTO) Warranty On Morbark Industries Products Powered By Caterpillar Engines{7758}

1992/07/20 High Water Temperature Regulator May Help Prevent White Exhaust Smoke{1355}

1992/07/20 Correction For Camshaft And Valve Seat Specifications{1210,1103}

1992/07/20 New Hose Used In Engine Air Lines Groups{1058}

1992/07/13 New Disconnect Switch Plate{1400,7557}

1992/07/13 New Steel Plunger Used In Oil Filter Relief Valve Plunger; Use 2P4005 Oil Filters Instead Of 1R0716 Oil Filters{1315,1318}

1992/06/29 New Cylinder Heads Have Additional Coolant Passages{1101,1100}

1992/06/29 Thinner Spacer Plates Available For Parts Service{1221}

1992/06/22 New Training Material On 3306C And 3406C Truck Engines Available{0374,0375}

1992/06/22 Centrifugal Lube Filter Group Available{1328}

1992/07/27 New Hardware Used In Water Lines Group{1380}

1992/07/27 Boxes/Cartons Containing Used Cores Should Be Immediately And Clearly Identified{0661}

1992/08/10 Taller Water Seals Used In Cylinder Head Groups {1115}

1992/08/10 Proper Alternator Bench Testing {1405,1400}

1992/08/10 New Carrier Assembly Used In Governor And Fuel Pump Drive Groups {1288,1299}

1992/08/24 Application Changes For Electronic Unit Injector (EUI) Part Numbers {1290}

1992/08/24 New Electronic Unit Injector (EUI) With New Style Solenoid Used; New Unit Injector Wiring Group Used {1290}

1992/08/24 Reusability of Exhaust Valves in All Caterpillar Engines {1105}

1992/08/24 New Cylinder Head Group Provides Lower Valve Guide Temperatures {1100,1104,1112,1123}

1992/08/31 New Deutsch HD-10® Electrical Connectors Used{1400}

1992/08/31 New "3406B Engine Instructor Manual" Available{0374}

1992/08/31 Be Sure The Fuel Injection Pump Housing Is Compatible With 0R0715 And 0R2545 Remanufactured Short Blocks{1201,1253}