LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2021 >> QX50 Essential, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Audio, Visual & Navigation System (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> DTC B1309: Av Control Unit >> DTC Description >> DTC Detection Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Detection Logic

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B1309-11

AV control unit

(AV control unit)

[GND-SHOR]

Diagnosis condition

When ignition switch is ON.

Signal (terminal)

  • M CAN-L (terminals 58 and 59)
  • M CAN-H (terminals 38 and 39)

Threshold

-

Diagnosis delay time

30 seconds or more

B1309-12

[VB-SHOR]

Diagnosis condition

When ignition switch is ON.

Signal (terminal)

  • M CAN-L (terminals 58 and 59)
  • M CAN-H (terminals 38 and 39)

Threshold

-

Diagnosis delay time

30 seconds or more