DESCRIPTION The DCM (telematics transceiver) sends a mute signal to the radio and display receiver assembly.
The radio and display receiver 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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- 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.
- 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: |
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 (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) |
(a) Disconnect the G2 radio and display receiver 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 | |
G2-3 (TMUT) - G9-17 (MUTE) |
Always | Below 1 Ω | |
G2-3 (TMUT) or G9-17 (MUTE) - Body ground |
Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 3. |
INSPECT RADIO AND DISPLAY RECEIVER 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 RADIO AND DISPLAY RECEIVER ASSEMBLY | | 
