With Navigation: Description

WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.

U1300 is indicated when malfunction occurs in communication signal of multi AV system. Indicated simultaneously, without fail, with the malfunction of control units connected to AV control unit with communication line.

Determine the possible malfunction cause from the table below.

SELF-DIAGNOSIS RESULTS DISPLAY ITEM

DTC	Display contents of CONSULT-III	Description	Possible malfunction factor/Action to take
U1300 U121F	AV COMM CIRCUIT [U1300] INTERNAL COMM [U121F]	Malfunction is detected in AV control unit power supply and ground circuits.	Check AV control unit power supply and ground circuits. When detecting no malfunction in those components, replace AV control unit.
U1300 U1240	AV COMM CIRCUIT [U1300] SWITCH CONN [U1240]	When either one of the following items is detected: multifunction switch power supply and ground circuits are malfunctioning. AV communication signal between AV control unit and multifunction switch is malfunctioning.	Multifunction switch power supply and ground circuits.
U1300 U1248	AV COMM CIRCUIT [U1300] DVD DECK CONN [U1248]	When either one of the following items is detected: DVD player power supply and ground circuits. AV communication signal between AV control unit and DVD player.	DVD player power supply and ground circuits.
U1300 U124E	AV COMM CIRCUIT [U1300] AMP CONN [U124E]	When either one of the following items is detected: BOSE amp. power supply and ground circuits are malfunctioning. AV communication signal between AV control unit and BOSE amp. is malfunctioning.	BOSE amp. power supply and ground circuits.
U1300 U1252	AV COMM CIRCUIT [U1300] REAR CAMERA LAN CONN [U1252]	When either one of the following items is detected: camera control unit power supply and ground circuits are malfunctioning. AV communication signal between AV control unit and camera control unit is malfunctioning.	Camera control unit power supply and ground circuits.
U1300 U1254	AV COMM CIRCUIT [U1300] IPod CONN [U1254]	When either one of the following items is detected: iPod adapter power supply and ground circuits are malfunctioning. AV communication circuits between camera control unit and iPod adapter are malfunctioning. AV communication signal between AV control unit and iPod adapter is malfunctioning.	iPod adapter power supply and ground circuits. AV communication circuits between camera control unit and iPod adapter.
U1300 U1252 U1254	AV COMM CIRCUIT [U1300] REAR CAMERA LAN CONN [U1252] IPod CONN [U1254]	Malfunction is detected in AV communication circuits between BOSE amp. and camera control unit.	AV communication circuits between BOSE amp. and camera control unit.
U1300 U124E U1252 U1254	AV COMM CIRCUIT [U1300] AMP CONN [U124E] REAR CAMERA LAN CONN [U1252] IPod CONN [U1254]	Without DVD player models Malfunction is detected in AV communication circuits between multifunction switch and BOSE amp. are malfunctioning. With DVD player models Malfunction is detected in AV communication circuits between DVD player and BOSE amp. are malfunctioning.	Without DVD player models AV communication circuits between multifunction switch and BOSE amp. With DVD player models AV communication circuits between DVD player and BOSE amp.
U1300 U1248 U124E U1252 U1254	AV COMM CIRCUIT [U1300] DVD DECK CONN [U1248] AMP CONN [U124E] REAR CAMERA LAN CONN [U1252] IPod CONN [U1254]	Malfunction is detected in AV communication circuits between multifunction switch and DVD player.	AV communication circuits between multifunction switch and DVD player.
U1300 U124E U1252 U1254	Without DVD player models AV COMM CIRCUIT [U1300] SWITCH CONN [U1240] AMP CONN [U124E] REAR CAMERA LAN CONN [U1252] IPod CONN [U1254]	Malfunction is detected in AV communication circuits between AV control unit and multifunction switch.	AV communication circuits between AV control unit and multifunction switch.
U1300 U1240 U1248 U124E U1252 U1254	With DVD player models AV COMM CIRCUIT [U1300] SWITCH CONN [U1240] DVD DECK CONN [U1248] AMP CONN [U124E] REAR CAMERA LAN CONN [U1252] IPod CONN [U1254]
U1300 U121F U1240 U124E U1252 U1254	Without DVD player models AV COMM CIRCUIT [U1300] INTERNAL COMM [U121F] SWITCH CONN [U1240] AMP CONN [U124E] REAR CAMERA LAN CONN [U1252] IPod CONN [U1254]	Malfunction is detected in AV communication circuits.	Check and repair the short circuit in AV communication circuits.
U1300 U121F U1240 U1248 U124E U1252 U1254	With DVD player models AV COMM CIRCUIT [U1300] INTERNAL COMM [U121F] SWITCH CONN [U1240] DVD DECK CONN [U1248] AMP CONN [U124E] REAR CAMERA LAN CONN [U1252] IPod CONN [U1254]	Malfunction is detected in AV communication circuits.