GASKET 4M8971 - Caterpillar

The Machine Security System (MSS) uses a status indicator that is mounted in the cab near the key start switch or in the dash cluster. The status indicator provides a visible alert of the presence of the security system. When the key start switch is first turned to the ON or START positions, and MSS is armed, a red light status indicator momentarily displays. This light provides a warning that the machine is armed with a security system.Status Indicator
Illustration 1 g01014891
Typical installation of the Status Indicator
(1) Status Indicator The status of the MSS is displayed by the status indicator in accordance with Table 1. The operator can use the status indicator to determine the status of the system or for troubleshooting.
Table 1
Status Indicators(1) Description
Red The MSS is armed.(2)
Green The MSS is disarmed.
The green LED will remain ON 30 seconds after power down (Grace Period). After the 30 seconds have passed, the MSS automatically returns to the "armed" mode.
(1) The LED's are illuminated during initial power-up in order to test the LED's.
(2) The red LED will remain ON while the key is in the ON position or until a valid key is read.