BEARING 7F7688 - Caterpillar

Table 2
Chassis ECM Contact Description J2(1)
No.(2) Type Function
3 Sourcing Driver Output Autolube Solenoid
4 Sourcing Driver Return Load Return 1
8 Sourcing Driver Return Load Return 2
22 Return Sensor / Driver Return
34 PWM Input Proportional Solenoid Return Feedback 3
40 PWM Input Proportional Solenoid Return Feedback 1
41 PWM Input Proportional Solenoid Return Feedback 2
56 CAN Data Link + CAN A Data Link +
63 Return Sensor Driver Return
67 CAN Data Link + CAN A Data Link +
68 CAN Data Link - CAN A Data Link -
70 Can Data Link - CAN A Data Link -
(1) The ECM responds to an active input only when all of the necessary conditions are satisfied.
(2) The connector contacts that are not listed are not used.Outputs
The ECM responds to decisions by sending electrical signals to the outputs. The outputs can create an action or the outputs can provide information to the operator or the service technician.Relays
Autolube Relay
Illustration 3 g03323937The autolube relay is an electric switch that is controlled by the ECM. The relay controls power to the autolube pump motor. When the ECM sends a signal to the relay, the relay activates allowing power to flow to the autolube pump.Data Link
Electronic communication between the Machine Control ECM, the Implement Control 2 ECM and the other control modules on the machine is conducted over data link circuits. The data link circuits allow the sharing of information with other electronic control modules. The data link circuits are bidirectional. The data link circuit allows the ECM to send information and to receive information.The electronic communication system consists of two types of data link systems.
Cat Data Link
SAE J1939 (CAN) Data Link The two types of data links are the main structure for communication between all of the control modules on the machine. The SAE J1939 Data Link circuit is mostly used for faster operational communication between the control modules on the machine. The Cat Data Link is used for some of the internal communication that does not require the faster speeds and is used for communication with external devices such as the Caterpillar Electronic Technician (Cat ET) service tool.Cat Data Link
The Cat Data Link is an input/output of the ECM. The data link uses the connector for the service port in order 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 in order to change the operating modes. The Cat ET will read the service codes that are