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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Acoustic Vehicle Alerting System - Diagnostic Codes & Symptom Tests >> Acoustic Vehicle Alerting System >> DTC B1350-13: Acoustic Vehicle Alerting Speaker Circuit Open; DTC B1350-19: Acoustic Vehicle Alerting Speaker Circuit Current Above Threshold [11/2023 - ] >> Description

DTC B1350-13: Acoustic Vehicle Alerting Speaker Circuit Open; DTC B1350-19: Acoustic Vehicle Alerting Speaker Circuit Current Above Threshold [11/2023 - ]: Description

The vehicle approaching speaker assembly circuit consists of the vehicle approaching speaker controller and vehicle approaching speaker assembly.

This DTC is stored when a malfunction is detected in the vehicle approaching speaker assembly circuit or vehicle approaching speaker controller.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1350-13 Acoustic Vehicle Alerting Speaker Circuit Open Detection condition: 
  1. The ignition switch is ON.
  2. Power source voltage is 10 V or more.

Malfunction status: 

  1. When ECU output sound signal is being monitored with warning sound not being output, a speaker circuit open, short or short to ground is detected.

Malfunction duration: 

  1. 5 seconds or more
  • Vehicle approaching speaker controller
  • Vehicle approaching speaker assembly
  • Harness or connector
B1350-19 Acoustic Vehicle Alerting Speaker Circuit Current Above Threshold Detection condition: 
  1. The ignition switch is ON.
  2. Power source voltage is 9 V or more.

Malfunction status: 

  1. When vehicle proximity warning sound output conditions are met, an internal malfunction is continuously detected in the vehicle approaching speaker controller.

Malfunction duration: 

  1. 1 second or more
  • Vehicle approaching speaker controller
  • Vehicle approaching speaker assembly
  • Harness or connector
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