The mode pin state at power up decides which mode the keypad starts in. Ground on the mode pin starts Utility Mode. An open mode pin starts Run Mode, which is normal operation.
Utility Mode runs on the backup operating system. Use it to troubleshoot a keypad that will not start normally and to check the firmware version number. It is the recovery path when a normal boot fails.
| Mode pin at power up | Mode |
| GND | Utility Mode (backup OS, troubleshooting, version check) |
| Open | Run Mode (normal operation) |
A 120 ohm resistor is still required across CAN_H and CAN_L in Utility Mode over CAN.
Related: ED Keypad Wiring and Connector Pinout · My ED Keypad Is Not Responding · ED Keypad Overview and Compatibility
