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.

Click here

(b) Inspect the vehicle approaching speaker assembly.

Click here

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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