RING-RETAINING 8N1991 - Caterpillar

OP3 is the option for entering the password that is required for accessing OP4 through OP11. Options for the service modes OP4 through OP11 are protected with passwords. The passwords reduce the possibility of mistakenly altering information. Options OP1 and OP2 are used to view information. OP1 and OP2 are not protected with passwords.The "SCROLL" keys must be actuated in the correct sequence in order to gain access to OP4 through OP11. The password is identical for every GSC. The password cannot be changed. After the password is entered, the OP4 through OP10 options can be accessed. If a mistake is made during the entry of the password, "PE FAIL" is briefly shown on the upper display. The operator can restart the process of entering the password by pressing the "SELECT" key.Procedure To Enter The PasswordNote: Service mode cannot be entered when the ECS is in the "AUTO" position.Note: Any active shutdown fault must be made inactive in order to access Service Mode. A shutdown fault is active if the shutdown indicator for the fault is FLASHING. To temporarily change a shutdown fault from an active shutdown fault to an inactive shutdown fault, turn the ECS to the OFF/RESET position. To permanently change a shutdown fault from an active shutdown fault to an inactive shutdown fault, the fault must not be occurring. Also, the ECS must be turned to the OFF/RESET position. If the jumper from terminal 6 to terminal 9 is not installed on the ECS, the GSC will not power up in OFF/RESET and any active shutdown fault must be corrected before entering Service Mode.
Press "Service Mode" key in order to enter service mode. "OP1" is showing on the lower display. See Systems Operation, "Service Mode " for more information.
Press the "SCROLL UP" key twice."OP3" is showing.
Press the "SELECT" key. "P E _ _ _ _ _" is showing on the display.
Press the "SELECT" key. "P E _ _ _ _ _" is showing on the display. The first dash is flashing.
Press "SCROLL RIGHT" key. "P E 1 _ _ _ _" is showing on the display. The second dash is flashing.
Press "SCROLL DOWN"key. "P E 1 3 _ _ _" is showing on the display. The third dash is flashing.
Press "SCROLL UP" key. "P E 1 3 2 _ _"is showing on the display. The fourth dash is flashing.
Press "SCROLL DOWN" key. "P E 1 3 2 3 _" is showing on the display. The fifth dash is flashing.
Press "SCROLL RIGHT" key. "P E 1 3 2 3 1" is showing.
Press "ENTER" key. "P E PASS"is showing.
Press "EXIT" key. OP 1 is showing.Note: Once the password is entered, any option can be accessed. The password remains activated until Service Mode is exited.