Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Speaker Circuit (B1350)

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), auxiliary 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.

• Vehicle approaching speaker controller
• Vehicle approaching speaker assembly
• Harness or connector

1.

INSPECT VEHICLE APPROACHING SPEAKER ASSEMBLY

REPLACE VEHICLE APPROACHING SPEAKER ASSEMBLY

2.

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

A7-1 (+) - G38-3 (SP+)

Always

Below 1 Ω

A7-2 (-) - G38-8 (SP-)

Always

Below 1 Ω

A7-1 (+) or G38-3 (SP+) - Body ground

Always

10 kΩ or higher

A7-2 (-) or G38-8 (SP-) - Body ground

Always

10 kΩ or higher

REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER

REPAIR OR REPLACE HARNESS OR CONNECTOR