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| Illustration 1 | g03635061 |
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Electronic Control Module (ECM) | |
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| Illustration 2 | g01356828 |
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Machine ECM location | |
The Machine ECM is located below the RH operator console armrest. While standing on the ground, open the RH operator cab door. Locate the fuse panel behind the hinged door below the RH side of the RH operator console armrest. The Machine ECM is behind the fuse panel. Greater access to the ECM can be gained in detaching the fuse panel by removal of three bolts at the fuse panel hinge if ECM removal is necessary.
Two connectors join the wiring harness to the inputs and outputs of the ECM. The connector J1 has 50 pins and connector J2 has 38 pins. Refer to the Testing and Adjusting, "System Schematic" section of this manual for connector contact descriptions.
The ECM monitors the condition of the machine for proper system operation. Components sense the condition of the machine. Components then send electrical signals to the inputs of the ECM. The ECM compares the information from the inputs to the stored information. The ECM then decides if outputs should be activated. The activation is performed by sending electrical signals through the outputs to an electronic circuit.
Inputs
The ECM inputs receive information from various operator controls, switches and sensors. The signals provide information regarding the status of the machine and what the operator wants the machine to do. The ECM can perform diagnostics on these inputs to determine if the signal is faulted.
Outputs
The indicators allow the operator to know the state of certain functions of the machine ECM.
The ECM supplies a current to the appropriate outputs that energize relays and solenoids.
Communication
The ECM uses the CAN data link in order to communicate with Cat Electronic Technician (ET).
The CAN data link allows for high-speed communication between the machine electronic control module and the instrument cluster.