Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Sound cannot be Heard Sound Quality is Poor only when Replaying USB Storage Device or "iPod"

Toyota Corolla Cross (2022-2024) Service Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System / Sound cannot be Heard Sound Quality is Poor only when Replaying USB Storage Device or "iPod"

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed.

Click here

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO JACK ADAPTER ASSEMBLY)

(a) Disconnect the I279 radio and display receiver assembly connector.

(b) Disconnect the I260 stereo jack adapter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I279-2 (US1-) - I260-4 (D-)

Always

Below 1 Ω

I279-3 (US1+) - I260-1 (D+)

Always

Below 1 Ω

I279-5 (USG1) - I260-5 (UJSS)

Always

Below 1 Ω

I279-2 (US1-) or I260-4 (D-) - Body ground

Always

10 kΩ or higher

I279-3 (US1+) or I260-1 (D+) - Body ground

Always

10 kΩ or higher

I279-5 (USG1) or I260-5 (UJSS) - Body ground

Always

10 kΩ or higher

*a

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

*b

Front view of wire harness connector

(to Stereo Jack Adapter Assembly)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK STEREO JACK ADAPTER ASSEMBLY

(a) Replace the stereo jack adapter assembly with a new or known good one.

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(b) Check if the problem symptom recurs.

Result

Proceed to

Malfunction disappears

A

Malfunction occurs

B

A

END (STEREO JACK ADAPTER ASSEMBLY MALFUNCTIO)

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

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