CYLINDER GP 1796723 - Caterpillar

Illustration 1 g00573691
The data link is an input and an output of the ECM. The data link is connected to the ECM at connector J1-7 and J1-8. The data link is designed to communicate with other electronic control modules through the machine harness. The data link is not a visible component. The data link consists of internal ECM circuits and the connecting harness wiring. The data link is bidirectional. The data link allows the ECM to receive information and the data link allows the ECM to send information.The Brake/Cooling ECM requests the following information from the Transmission ECM:
Transmission Gear
Requested Gear Command
Transmission Gear Limit
Machine Speed
Torque Converter Oil Outlet Temperature
Transmission Oil Temperature
Transmission Requested Engine Speed Limit
Transmission Lock StatusThe Brake/Cooling ECM requests the following information from the Chassis ECM:
Hoist Output StatusThe Brake/Cooling ECM requests the following information from the Master Engine ECM:
Throttle PositionThe Brake/Cooling ECM requests the following information from the Front Engine ECM:
Engine Output Speed
Aftercooler Coolant Temperature
Engine Coolant TemperatureThe Brake/Cooling ECM requests the following information from the VIMS ECM:
Steering Oil Temperature
Machine PayloadCaterpillar Electronic Technician (ET) also communicates with other ECM modules through the data link. The ET will list the other ECM modules and the available diagnostic information.Note: All electronic control modules (ECM) that use the data link have a module identifier (MID). The MID is listed for each module:Engine ECM (Front) ... 033Engine ECM (Rear) ... 034Engine ECM (Master) ... 036VIMS Main Module ... 049Transmission ECM ... 081Chassis ECM ... 087Brake/Cooling ECM ... 116