DTC Detection Logic

WARNING: This page is about a different car, the 2019 Infiniti QX60. 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
B2721	Rear left side internal sensor (Rear sonar sensor LH inner)	1	Diagnosis condition	When ignition switch is ON and power supply voltage is 8.5V - 16.5V.
			Signal (terminal)	Rear inner left sensor signal (terminal 21)
			Threshold	Rear inner left sensor signal circuit is open or short to ground
			Diagnosis delay time	--
		2	Diagnosis condition	When ignition switch is ON and power supply voltage is 8.5V - 16.5V.
			Signal (terminal)	Rear inner left sensor signal (terminal 21)
			Threshold	Rear inner left sensor signal circuit is short to voltage
			Diagnosis delay time	--
		3	Diagnosis condition	When ignition switch is ON and power supply voltage is 9.5V - 16.5V.
			Signal (terminal)	Rear inner left sensor signal (terminal 21)
			Threshold	Rear sonar sensor LH inner element malfunction
			Diagnosis delay time	--