LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2011 >> G37 Base, 2D Coupe >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 53 (Audio System, Visual System & Navigation System (Base Audio Without Navigation) - G37 Convertible) >> DTC/Circuit Diagnosis >> DTC U1300: Av Comm Circuit >> Description >> Self-Diagnosis Results Display Item
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Self-Diagnosis Results Display Item

WARNING: This page is about a different variant/trim than selected.
DTC DETECTION CONDITION CHART AND POSSIBLE MALFUNCTION FACTOR

DTC Display contents of CONSULT-III DTC detection condition Possible malfunction factor
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 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
U1256
  • AV COMM CIRCUIT [U1300]
  • HAND FREE CONN [U1256]
When either one of the following items is detected:
  • TEL adapter unit power supply and ground circuits are malfunctioning.
  • AV communication circuits between AV control unit and TEL adapter unit are malfunctioning.
  • TEL adapter unit power supply and ground circuits.
  • AV communication circuits between AV control unit and TEL adapter unit.
U1300
U1240
U1256
  • AV COMM CIRCUIT [U1300]
  • SWITCH CONN [U1240]
  • HAND FREE CONN [U1256]
Malfunction is detected in AV communication circuits between AV control unit and multifunction switch. AV communication circuits between AV control unit and multifunction switch.