Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: 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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Before replacing the DCM (telematics transceiver), refer to Registration.
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PROCEDURE
| 1. | INSPECT DCM (TELEMATICS TRANSCEIVER) |
| (a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| OK |  | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
| 2. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) |
(a) Disconnect the J156 stereo component amplifier assembly connector.
(b) Disconnect the J157 DCM (telematics transceiver) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J156-24 (TMUT) - J157-14 (MUTE) | Always | Below 1 Ω |
| J156-24 (TMUT) or J157-14 (MUTE) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
| 3. | INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY |
(a) Reconnect the J156 stereo component amplifier assembly connector.
| (b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| OK | | REPLACE DCM (TELEMATICS TRANSCEIVER) |
| NG | | REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY |
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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