| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001NZNW |
| Model Year Start: 2021 | Model: GR Corolla | Prod Date Range: [04/2020 - 11/2022] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver; 2021 - 2023 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 11/2022] | ||
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Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver |
DESCRIPTION
The DCM (telematics transceiver) sends a mute signal to the stereo component amplifier assembly.
The stereo component amplifier assembly controls the volume according to the mute signal from the DCM (telematics transceiver).
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. Refer to Precaution for Audio and Visual System.
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![2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): PRECAUTION](/t3Portal/stylegraphics/info.gif)
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When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.
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Before replacing the DCM (telematics transceiver), refer to Registration.
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PROCEDURE
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1. |
INSPECT DCM (TELEMATICS TRANSCEIVER) |
|
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
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| OK |
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PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
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2. |
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) |
(a) Disconnect the I68 stereo component amplifier assembly connector.
(b) Disconnect the I143 DCM (telematics transceiver) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I68-24 (TMUT) - I143-14 (MUTE) |
Always |
Below 1 Ω |
|
I68-24 (TMUT) or I143-14 (MUTE) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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3. |
INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY |
(a) Disconnect the I143 DCM (telematics transceiver) connector.
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(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| OK |
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REPLACE DCM (TELEMATICS TRANSCEIVER)
|
| NG |
|
REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY
|
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