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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Audio, Visual & Navigation System (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> Multi Av (Av Control Unit) >> B1309 Av Control Unit >> DTC Description
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DTC Description

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)
  • AV communication low (terminals 58 and 59)
  • AV communication high (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)
  • AV communication low (terminals 58 and 59)
  • AV communication high (terminals 38 and 39)
Threshold -
Diagnosis delay time 30 seconds or more

POSSIBLE CAUSE 

FAIL-SAFE 

No sound from Bose speaker amp.