DTC U1300: Av Comm Circuit: Description

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]	AV control unit power supply and ground circuits. AV control unit malfunction is detected.	AV control unit power supply and ground circuits.
U1300 U1240	AV COMM CIRCUIT [U1300] SWITCH CONN [U1240]	Multifunction switch power supply and ground circuits malfunction is detected. Malfunction is detected in AV communication circuits between AV control unit and multifunction switch. Malfunction is detected in AV communication signal between AV control unit and multifunction switch.	Multifunction switch power supply and ground circuits. AV communication circuit between AV control unit and multifunction switch.
U1300 U124E	AV COMM CIRCUIT [U1300] AMP CONN [U124E]	BOSE amp. power supply and ground circuits are malfunctioning.	BOSE amp. power supply and ground circuits.
U1300 U1252	AV COMM CIRCUIT [U1300] REAR CAMERA LAN CONN [U1252]	Camera control unit power supply and ground circuits malfunction is detected. Malfunction is detected in AV communication circuit between BOSE amp. and camera control unit. Malfunction is detected in AV communication signal between AV control unit and camera control unit.	Camera control unit power supply and ground circuits. AV communication circuits between BOSE amp. and camera control unit.
U1300 U1254	AV COMM CIRCUIT [U1300] IPOD CONN [U1254]	iPod adapter power supply and ground circuits malfunction is detected Malfunction is detected in AV communication circuits between multifunction switch and iPod adapter. Malfunction is detected in AV communication signal between AV control unit and iPod adapter.	iPod adapter power supply and ground circuits AV communication circuits between multifunction switch and iPod adapter.
U1300 U1252 U124E	AV COMM CIRCUIT [U1300] REAR CAMERA LAN CONN [U1252] AMP CONN [U124E]	Malfunction is detected in AV communication circuits between iPod adapter and BOSE amp.	AV communication circuits between iPod adapter and BOSE amp.
U1300 U1252 U1254 U124E	AV COMM CIRCUIT [U1300] REAR CAMERA LAN CONN [U1252] IPOD CONN [U1254] AMP CONN [U124E]	Malfunction is detected in AV communication circuits between multifunction switch and BOSE amp.	AV communication circuits between multifunction switch and BOSE amp.
U1300 U1240 U1252 U1254 U124E	AV COMM CIRCUIT [U1300] SWITCH CONN [U1240] REAR CAMERA LAN CONN [U1252] IPOD CONN [U1254] AMP CONN [U124E]	Malfunction is detected in AV communication circuits between AV control unit and multifunction switch.	AV communication circuits between AV control unit and multifunction switch.