VEHICLE PROXIMITY NOTIFICATION SYSTEM, Diagnostic DTC:B1350

DTC Code DTC Name
B1350 Speaker Circuit

DESCRIPTION

The vehicle approaching speaker assembly circuit consists of the hybrid vehicle control ECU and vehicle approaching speaker assembly.

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

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B1350 Speaker Circuit

Either of the following conditions is met:


  • When sound output voltage is being monitored by the ECU, with the power switch on (IG), battery voltage 10 V or more, and warning sound being produced, a speaker circuit short condition continues for 1 second or more.

  • When sound output voltage is being monitored by the ECU, with the power switch on (IG) and warning sound not being produced, a speaker circuit open condition continues for 5 seconds or more.

  • Hybrid vehicle control ECU

  • Vehicle approaching speaker assembly

  • Harness or connector between hybrid vehicle control ECU and vehicle approaching speaker assembly

 If the hybrid vehicle control ECU stores a DTC, the pattern select switch assembly (vehicle approaching speaker switch) indicator light will blink for 16 seconds and then illuminate.

WIRING DIAGRAM

B004P8OE08
*a SPK+
*b SPK-
*c Hybrid Vehicle Control ECU
*d Vehicle Approaching Speaker Assembly

PROCEDURE


  1. INSPECT VEHICLE APPROACHING SPEAKER ASSEMBLY


    1. Remove the vehicle approaching speaker assembly.

      Click here

    2. Inspect the vehicle approaching speaker assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE VEHICLE APPROACHING SPEAKER ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - VEHICLE APPROACHING SPEAKER ASSEMBLY)


    1. Disconnect the A50 hybrid vehicle control ECU connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A50-19 (SPK+) - A16-1 (+) Always Below 1 Ω
      A50-9 (SPK-) - A16-2 (-) Always Below 1 Ω
      A50-19 (SPK+) or A16-1 (+) - Body ground Always 10 kΩ or higher
      A50-9 (SPK-) or A16-2 (-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR