TORQUE CONVERTER GP 7G8654 - Caterpillar

The temperature sensor for the transmission informs the ECM of the temperature of the system oil.The sensor sends an analog signal to the ECM indicating the oil temperature. The resistance range for this sensor is 33,650 ohms at −40° C (104.° F) to 18.6 ohms at 150° C (302° F).Outputs
Solenoids
Demand Fan Solenoid
Illustration 5 g03061277The Demand fan solenoid is connected to a PWN output on the transmission ECM. The fan speed is reduced to minimum when the temperature. When the temperature reaches a certain level, the fan speed increases to provide more system cooling. If the temperature does not decrease, the fan speed is gradually increased until the temperature returns below the target temperature.Data Link
Cat Data Link
The Cat Data Link is an input/output of the ECM. The data link uses the connector for the service port to communicate with the Caterpillar Electronic Technician. A data link connection is provided for the product link.Note: The control for the product link provides a global positioning system for the machine.The data link is bidirectional. The bidirectional link allows the ECM to input information and output information. The data link consists of the following parts: internal ECM circuits, the related harness wiring, the service tool connector, and the connector for the product link. The Cat Data Link connects to the ECM at contact J1-10 (wire 893-GN(Green)) and contact J1-20 (wire 892-BR(Brown)).
The ECM receives commands from the Cat ET to change the operating modes. The Cat ET will read the service codes that are stored in the memory of the ECM. The Cat ET will clear the service codes that are stored in the memory of the ECM.
The ECM sends the input and the output information to the Caterpillar ET.Note: An electronic control module that uses the Cat Data Link will have a module identifier. The MID for the Electronic Control Module is 1B.CAN Data Link
A data link is required for communication with the service tool (Cat ET) and the electronic control modules as well as instrument clusters and other devices that use this communications protocol.ATAAC Fan Control
In the ATAAC fan system, the speed of the fan is directly controlled by the engine ECM through solenoid valve (7). The engine ECM interprets signals from the following sensors on the machine:
Charge Air Cooler Outlet Temperature Sensor
Fuel Temperature Sensor
Hydraulic Oil Temperature Sensor
Intake Manifold Air Temperature Sensor (IMAP)Note: The IMAP sensor is only equipped on LRC machines.The sensor for the intake manifold temperature sends a signal to contact J2-56 through the C967-BU(Blue)wire on the engine ECM.The following conditions must be met, to run the fan system at minimum fan speed.
Table 3
Machine Charge Ail Cooler Outlet Temperature at or below 25° C (77° F) ambient Charge Ail Cooler Outlet Temperature at or below 35° C (95° F) ambient IMAT Fuel Temperature Hydraulic Oil Temperature(1)
725C/ 725C2 HRC 50° C (122° F) 60° C (140° F) N/A 74° C