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 Navigation System.
Click here 
- Before replacing the DCM (telematics transceiver), refer to Registration.
Click here
PROCEDURE |
1. | INSPECT DCM (TELEMATICS TRANSCEIVER) |
| (a) Measure the voltage according to the value(s) in the table below.
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
G9-17 (MUTE) - Body ground |
Engine switch on (ACC) Audio system playing → Emergency call mode |
2.0 V or higher → Below 1 V | |
 |
|
*a | Component with harness connected
(DCM (Telematics Transceiver)) | | |
| OK |
 | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
NG |
 | |
| 2. |
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) |
(a) Disconnect the G8 stereo component amplifier assembly connector. (b) Disconnect the G9 DCM (telematics transceiver) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G8-24 (TMUT) - G9-17 (MUTE) |
Always | Below 1 Ω | |
G8-24 (TMUT) or G9-17 (MUTE) - Body ground |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 3. |
INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY |
(a) Disconnect the G9 DCM (telematics transceiver) connector.
| (b) Measure the voltage according to the value(s) in the table below.
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
G9-17 (MUTE) - Body ground |
Engine switch on (ACC) |
2.0 V or higher | |
 |
|
*a | Front view of wire harness connector
(to DCM (Telematics Transceiver)) | | |
| OK |
| REPLACE DCM (TELEMATICS TRANSCEIVER) |
| NG |
| REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY | | 
