TANK GP-COOLANT 4502761 - Caterpillar

Power Down Function
The Transmission ECU will have the ECU positive voltage lines of the battery run to unswitched battery in the vehicle harness. The key switch ON (C16: 7 to J1-1) pin on the Transmission ECU is run, to the key switch ON position in the vehicle and when it turns off, the software controls when the Transmission ECU actually shuts down.When the key switch ON input turns OFF, the transmission software will continue to run normally until one of the following two conditions are met :
The transmission output speed is zero and the transmission is the NEUTRAL position.
The transmission output speed is zero and the engine speed is zero.The second statement covers the event of the shift selector being left in gear or is faulted because it shuts down due to power being turned off. When the shift selector is faulted, the shift control logic holds the previous position of the shift selector and will not shift to NEUTRAL as long as the shift selector is faulted and was previously in a gear.Transmission Filter Bypass Function
The transmission filter bypass function is used in order to warn the operator when the transmission filter is being bypassed. The filter could be plugged due to contamination. The red warning lamp indicator is turned ON in order to warn the operator.The filter bypass input is a switch to common. If this input has a closed circuit, then the filter is not bypassing (OK). If the input has an open circuit, then the filter is bypassing (PLUGGED). A warning will occur if the input wire to the ECU breaks. If the oil is not bypassing and an open circuit exists, then the harness needs checked and repaired. When the transmission filter bypass input indicates that the filter is plugged, an event is logged and the transmission warning lamp is activated.Engine Overspeed Protection
When the engine speed increases to a predetermined level, the Transmission ECU will upshift. The transmission will shift ONE gear position past the operator's selection in order to protect the engine from overspeed.Torque Limiting Function
Customer password protected programmable parameter with a programmable range of 0-65535 N m. This configurable parameter is used to limit engine torque to protect driveline components. This value reflects significant margin on the most aggressive torque converter match for on-highway applications. The customer parameter is programmable with Cat ET.Note: DO NOT CHANGE FACTORY SETTINGS.Directional Shift Management Function
The Transmission ECU will not allow a directional change if the engine speed is above 1000 rpm or transmission output speed is above 150 rpm. If either of these conditions are not met when the operator commands a directional shift, then the transmission will shift to NEUTRAL and the desired gear display will flash. The operator will then have to select NEUTRAL before selecting FORWARD or REVERSE after this has occurred.Check Transmission Lamp
The check transmission lamp function turns on when there is a diagnostic that is active. This lamp is an amber colored lamp.Note: The check transmission lamp driver output will