Diagnostic LEDs

PC22411-UN-04APR16

A - A LED

B - B LED

C - C LED

D - Power LED

LED	Color	Blinks Per Second	Description
Power	Green	Solid state	Electronic control unit (ECU) powered
A	None	Solid state	Microprocessor is not powered
	Any	Solid state	Microprocessor has stopped updating LED status
	Yellow	1	Boot hold mode
	Red	5	Microprocessor is programming
	Red	1	ISOBUS is offline
	White	1	Virtual terminal (VT) is offline
	Purple	1	Loopback test mode is enabled
	Green	1	VT and system are normal
B	Red	Solid state	Field programmable gate array (FPGA) is not running
	Red	1	Low voltage power lost
	Blue	1	Signal is present on one or more rate sensors
	Yellow	1	Diagnostic trouble codes (DTCs) are active
	White	1	System voltage is below 11.5 V
	Purple	1	System voltage is above 16 V
	Blue	Solid state	One or more product switches have been set to On
	Purple	Solid state	Signal is present on one or more RPM sensors
	Green	Solid state	All product switches have been set to Off
	Red	Solid state	(Loopback test mode only) Loopback subtest failed in current test sequence
	Yellow	Solid state	(Loopback test mode only) Loopback subtest failed in the previous sequence
	Green	Solid state	(Loopback test mode only) No loopback subtests have failed
C	Red	Solid state	FPGA is not running
	Green	1	Auxiliary CAN channel is active
	Red	1	Auxiliary CAN channel was active and is now offline
	Green	Solid state	LED C is functional and there are no other LED C states to report
	Purple	Solid state	Loopback test is in progress