PLATE ASSEM. 3S3878 - Caterpillar

Petroleum Engine:
C27 PETROLEUM (S/N: NAR1-UP)
C32 PETROLEUM (S/N: SDK1-UP)
Description of Change: New engine software is now used on certain C27 and C32 Tier 4 Final engines.Adaptable To: The new software adds a new feature called "Arctic Weather Strategy". To enable the new "Arctic Weather Strategy", Pin 46 on the J1/P1 connector will need to be sent to chassis ground or to digital sensor return Pin 18 on the J1/P1 connector. When Pin 46 is grounded, the operator/OEM is acknowledging that the engine is in a Non-Work mode and the ECU has permission to take control of engine speed. When the conditions are met, the engine will enter the new strategy. Within the "Arctic Weather Strategy" there are two modes, "Charge Air Cooler Out Temperature Protection (COTP)" and "Arctic Cold Mode". These modes will only become active when Pin 46 is grounded and intake manifold temperatures are below 0° C (32° F) for a certain amount of time. The length of time varies between 1 to 3 hours depending on intake temperature. There are two requirements which allow an exit of cold mode, intake manifold temperatures rise above 10°