SPRING 7T1878 - Caterpillar

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Engine-stop (remote control) circuitThe components of the engine stop (remote control) circuit are the: remote control switch, keypad 1, Power Train Electronic Control Module (ECM), Engine ECM and interface control module.
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Dash panel (1) Keypad 1 (2) Remote control switch
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(2) Remote control switch (3) Remote control indicator
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Typical exampleView of hydraulic tank compartment (4) Interface control module
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Internal view of interface control module (4) Interface control module (5) Engine stop relay 16
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Cab (6) Power Train ECM (cover removed)
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Right side view of engine (7) Engine ECMWith the key start switch in the ON position, 24 V power is supplied via circuit breaker CB1 to:
Keypad 1 (1)
Power Train ECM (6)
Engine ECM (7) 24 V unswitched power is supplied via circuit breaker CB22 to keypad 1 (1). 24 V unswitched power is supplied via circuit breaker CB26 to Engine ECM (7) .When remote control switch (2) on keypad 1 (1) is pressed, a signal is sent via CAN Data Link to Power train ECM (6). Power Train ECM (6) will send a signal to the receiver and interface control module (4). Power Train ECM (6) will send a signal via CAT Data Link to Engine ECM (7) .Note: When the remote control switch (2) on keypad 1 (1) is pressed, remote control indicator (3) will illuminate.When remote control switch (2) is pressed, a radio signal is sent by the transmitter to the receiver. The receiver sends a signal to interface control module (4) . When the transmitter sends a stop engine signal to the receiver, the receiver interrupts power to engine stop relay 16 (5). A stop signal is sent to Power Train ECM (6). Power Train ECM (6) sends a signal via CAT Data Link to Engine ECM (7). Engine ECM (7) will signal the engine to shut down.ReferenceFor more information on the remote control system, refer to Systems Operation, Testing and Adjusting, "Remote Control System" for the machine that is being serviced.ReferenceFor more information on the keypads, refer to the Systems Operation, Testing, and Adjusting, UENR1493, "Features" for the machine that is being serviced.