Self-Diagnosis Results Display Item

WARNING: This page is about a different car, the 2013 Infiniti M56 and 2013 Infiniti M37. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTION CONDITION

DTC	Display contents of CONSULT	DTC detection condition	Possible malfunction factor
U1300 U1240	AV COMM CIRCUIT [U1300] SWITCH CONN [U1240]	When either one of the following items are detected: multifunction switch power supply and ground circuits are malfunctioning. AV communication circuits between AV control unit and multifunction switch are malfunctioning.	Multifunction switch power supply and ground circuits. AV communication circuits between AV control unit and multifunction switch.
U1300 U124E	AV COMM CIRCUIT [U1300] AMP CONN [U124E]	When either one of the following items are detected: BOSE amp. power supply and ground circuits are malfunctioning. AV communication circuits between multifunction switch and BOSE amp. are malfunctioning.	BOSE amp. power supply and ground circuits. Refer to "BOSE AMP.: DIAGNOSIS PROCEDURE ". AV communication circuits between multifunction switch and BOSE amp.
U1300 U1240 U124E	AV COMM CIRCUIT [U1300] SWITCH CONN [U1240] AMP CONN [U124E]	AV communication circuits between AV control unit and multifunction switch are malfunctioning.	AV communication circuits between AV control unit and multifunction switch.