DTC Detection Logic

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC Detection Condition
B20A1	ECM RELAY ON CIRC (ECM relay ON circuit)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	O2 sensor #1 circuit (terminal 53) O2 sensor #2 circuit (terminal 52) Engine solenoid circuit (terminal 59) ECM battery circuit (terminal 13)
		Threshold	-
		Diagnosis delay time	1 second or more