Lexus NX manuals

Lexus NX: Speaker Circuit (B1350)

Lexus NX Service Manual / Vehicle Exterior / Acoustic Vehicle Alerting System / Acoustic Vehicle Alerting System / Speaker Circuit (B1350)

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

Speaker Circuit
  • The power switch is on (IG).
  • IG power source voltage is 10 V or more.
  • 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.
  • When vehicle proximity warning sound output conditions are met, an internal malfunction is continuously detected in the vehicle approaching speaker controller.
  • 6 seconds or more
  • 3 seconds or more
  • Vehicle approaching speaker controller
  • Vehicle approaching speaker assembly
  • Harness or connector

WIRING DIAGRAM

PROCEDURE

1.

INSPECT VEHICLE APPROACHING SPEAKER ASSEMBLY

(a) Remove the vehicle approaching speaker assembly.

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(b) Inspect the vehicle approaching speaker assembly.

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NG

REPLACE VEHICLE APPROACHING SPEAKER ASSEMBLY

OK

2.

CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER ASSEMBLY - VEHICLE APPROACHING SPEAKER CONTROLLER)

(a) Disconnect the A80 vehicle approaching speaker controller connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A79-2 - A80-7 (SP+)

Always

Below 1 Ω

A79-1 - A80-8 (SP-)

Always

Below 1 Ω

A79-2 or A80-7 (SP+) - Body ground

Always

10 kΩ or higher

A79-1 or A80-8 (SP-) - Body ground

Always

10 kΩ or higher
OK

REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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