Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM10000000262KJ
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for 8 Inch Display Type (w/ Single Knob Type) or 10.5 Inch Display Type): Radio Broadcast cannot be Received or Poor Reception; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]

Radio Broadcast cannot be Received or Poor Reception

CAUTION / NOTICE / HINT

HINT:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

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PROCEDURE

1.

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Check the radio automatic station search function by activating it.

OK:

Automatic station search function stops on a station.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK OPTIONAL COMPONENTS

(a) Check if any optional components that may decrease reception capacity, such as sunshade film or a telephone antenna, are installed.

OK:

Optional components are not installed.

NOTICE:

Do not remove optional components without the permission of the customer.

NG

REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)

OK

3.

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Preparation for check

(1) Disconnect the RA radio and display receiver assembly connector.

(b) Check for noise

(1) Turn the ignition switch to ON with the radio and display receiver assembly connector connected.

(2) Turn the radio and display receiver assembly on and tune into AM mode.

(3) Place a screwdriver, thin wire or other metal object on the radio and display receiver assembly antenna jack and check that noise can be heard from the speakers.

OK:

Noise can be heard from the speakers.

NG

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OK

4.

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

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

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

RA-1 (ANT+) - Body ground

Ignition switch ACC

Radio switch on

7.0 to 16.0 V

*a

Component without harness connected

(Radio and Display Receiver Assembly)

NG

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OK

5.

INSPECT ANTENNA CORD SUB-ASSEMBLY

(a) Replace the antenna cord sub-assembly with a new or known good one and check if radio broadcasts can be received normally.

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OK:

Radio broadcasts can be received normally.

OK

END

NG

6.

INSPECT NO. 3 ANTENNA CORD SUB-ASSEMBLY

(a) Replace the No. 3 antenna cord sub-assembly with a new or known good one and check if radio broadcasts can be received normally.

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OK:

Radio broadcasts can be received normally.

OK

END

NG

7.

INSPECT NO. 2 ANTENNA CORD SUB-ASSEMBLY

(a) Replace the No. 2 antenna cord sub-assembly with a new or known good one and check if radio broadcasts can be received normally.

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OK:

Radio broadcasts can be received normally.

OK

END

NG

8.

INSPECT ROOF ANTENNA ASSEMBLY

(a) Replace the roof antenna assembly with a new or known good one and check if radio broadcasts can be received normally.

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OK:

Radio broadcasts can be received normally.

OK

END

NG

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