SUPPORT-PANEL 2501025 - Caterpillar

Table 5
Status for Downshift Switch for Command Control Steering
Switch Position N/C
J1-25 N/O
J1-26
Depressed Open Closed
Released Closed Open Start Switch (Key)
Illustration 4 g00291705
Key Start Switch
The key start switch is an input of the power train electronic control module (ECM). The key start switch informs the power train ECM of an attempt to start the engine. The power train ECM then initiates the neutral start function. During normal machine operation, the start terminal of the key start switch is open. When the key start switch is turned to the START position, the start terminal closes to the +battery and the +battery voltage is present at connector contact J1-40 of the power train ECM. When all starting conditions are satisfied, the power train ECM sends a +battery signal to the connector contact J1-8 for the start relay and engine cranking begins.Note: After the key start switch is initially turned to the START position, the switch will not return to the START position from the ON position. The switch must be turned to the OFF position first. Then, the switch can be turned to the START position.Reference: For more information on the neutral start function, refer to Systems Operation,