DESCRIPTION
w/ Telematics Transceiver (except ERA-GLONASS):
The radio receiver assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines.
Using this circuit, the DCM (telematics transceiver) sends power to the telephone microphone assembly, and the telephone microphone assembly sends microphone signals to the radio receiver assembly and navigation ECU.
w/o Telematics Transceiver or w/ Telematics Transceiver (for ERA-GLONASS):
The radio receiver assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines.
Using this circuit, the radio receiver assembly sends power to the telephone microphone assembly, and the telephone microphone assembly sends microphone signals to the radio receiver assembly and navigation ECU.
WIRING DIAGRAM
*a | Telephone Microphone Assembly |
*b | DCM (Telematics Transceiver) |
*c | Radio Receiver Assembly |
*d | Navigation ECU |
*a | Telephone Microphone Assembly |
*b | Radio Receiver Assembly |
*c | Navigation ECU |
CAUTION / NOTICE / HINT
Note
When replacing the radio receiver assembly, always replace it with a new one.
If a radio receiver assembly which was installed to another vehicle is used, the following may occur:
A communication malfunction DTC may be stored.
The radio receiver assembly may not operate normally.
Tech Tips
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.
PROCEDURE
CHECK VEHICLE TYPE
Check the vehicle type. Refer to Check Microphone (Input to navigation ECU) in Operation Check.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU) Click here |
A |
CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU)
Enter the "Microphone Check" screen. Refer to Check Microphone (Input to navigation ECU) in Operation Check.
When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
Tech Tips
The microphone is active at all times when "Microphone Check" screen is displayed.
OK |
---|
Microphone input level meter changes according to the input voice. |
Result | |||
---|---|---|---|
|
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here |
NG |
CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO RADIO RECEIVER ASSEMBLY)
Enter the "Microphone Check" screen. Refer to Check Microphone (Input to radio receiver assembly) in Operation Check.
When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
Tech Tips
The microphone is active at all times when "Microphone Check" screen is displayed.
OK |
---|
Microphone input level meter changes according to the input voice. |
Result | |||
---|---|---|---|
|
OK |
REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU) |
NG |
GO TO STEP 6 Click here |
CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU)
Enter the "Microphone Check" screen. Refer to Check Microphone (Input to navigation ECU) in Operation Check.
When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
Tech Tips
The microphone is active at all times when "Microphone Check" screen is displayed.
Push the recording switch and perform voice recording.
Tech Tips
Select the recording switch with the blower motor of the air conditioning system stopped. If an outlet of the air conditioning system is facing the microphone, noise may be recorded.
Voice can be recorded for up to 5 seconds.
Check that the recording indicator remains on while recording and that the recorded voice is played normally without noise or distortion.
OK |
---|
All check results are normal. |
Result | |||
---|---|---|---|
|
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here |
NG |
CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO RADIO RECEIVER ASSEMBLY)
Enter the "Microphone Check" screen. Refer to Check Microphone (Input to radio receiver assembly) in Operation Check.
When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
Tech Tips
The microphone is active at all times when "Microphone Check" screen is displayed.
Push the recording switch and perform voice recording.
Tech Tips
Select the recording switch with the blower motor of the air conditioning system stopped. If an outlet of the air conditioning system is facing the microphone, noise may be recorded.
Voice can be recorded for up to 5 seconds.
Check that the recording indicator remains on while recording and that the recorded voice is played normally without noise or distortion.
OK |
---|
All check results are normal. |
Result | |||
---|---|---|---|
|
OK |
REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU) |
NG |
CHECK VEHICLE TYPE
Check the vehicle type.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY) Click here |
A |
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)
Disconnect the G54 radio receiver assembly connector.
Disconnect the N15 telephone microphone assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - DCM [TELEMATICS TRANSCEIVER])
Disconnect the G54 radio receiver assembly connector.
Disconnect the G56 DCM (telematics transceiver) connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - TELEPHONE MICROPHONE ASSEMBLY)
Disconnect the G56 DCM (telematics transceiver) connector.
Disconnect the N15 telephone microphone assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK DCM (TELEMATICS TRANSCEIVER)
*a | Component with harness connected (DCM [Telematics Transceiver]) |
Remove the DCM (telematics transceiver) with the connector(s) still connected.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPLACE DCM (TELEMATICS TRANSCEIVER) Click here |
OK |
CHECK TELEPHONE MICROPHONE ASSEMBLY (OUTPUT TO DCM [TELEMATICS TRANSCEIVER])
*a | Component with harness connected (Telephone Microphone Assembly) |
Check the output waveform.
Remove the telephone microphone assembly with the connector(s) still connected.
Connect an oscilloscope to terminal N15-2 (MCO+) and N15-4 (MCO-).
Turn the engine switch on (ACC).
Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the telephone microphone assembly sound holes in the microphone case LH.
Check the signal waveform according to the condition(s) in the table below.
Item | Condition |
---|---|
Measurement terminal | N15-2 (MCO+) - N15-4 (MCO-) |
Tool setting | 50 mV/DIV., 500 ms/DIV. |
Vehicle condition |
|
OK |
---|
The waveform is similar to that shown in the illustration. |
Tech Tips
The oscilloscope waveform shown in the illustration is an example for reference only.
Result | |||
---|---|---|---|
|
NG |
REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here |
OK |
CHECK DCM (TELEMATICS TRANSCEIVER) (OUTPUT TO RADIO RECEIVER ASSEMBLY)
*a | Component with harness connected (DCM [Telematics Transceiver]) |
Check the output waveform.
Remove the DCM (telematics transceiver) with the connector(s) still connected.
Connect an oscilloscope to terminal G56-18 (MCO+) and G56-19 (MCO-).
Turn the engine switch on (ACC).
Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the telephone microphone assembly sound holes in the microphone case LH.
Check the signal waveform according to the condition(s) in the table below.
Item | Condition |
---|---|
Measurement terminal | G56-18 (MCO+) - G56-19 (MCO-) |
Tool setting | 50 mV/DIV., 500 ms/DIV. |
Vehicle condition |
|
OK |
---|
The waveform is similar to that shown in the illustration. |
Tech Tips
The oscilloscope waveform shown in the illustration is an example for reference only.
Result | |||
---|---|---|---|
|
OK |
REPLACE RADIO RECEIVER ASSEMBLY Click here |
NG |
REPLACE DCM (TELEMATICS TRANSCEIVER) Click here |
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)
Disconnect the G54 radio receiver assembly connector.
Disconnect the N15 telephone microphone assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK RADIO RECEIVER ASSEMBLY
*a | Component with harness connected (Radio Receiver Assembly) |
Remove the radio receiver assembly with the connector(s) still connected.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPLACE RADIO RECEIVER ASSEMBLY Click here |
OK |
CHECK TELEPHONE MICROPHONE ASSEMBLY (OUTPUT TO RADIO RECEIVER ASSEMBLY)
*a | Component with harness connected (Telephone Microphone Assembly) |
Check the output waveform.
Remove the telephone microphone assembly with the connector(s) still connected.
Connect an oscilloscope to terminal N15-2 (MCO+) and N15-4 (MCO-).
Turn the engine switch on (ACC).
Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the telephone microphone assembly sound holes in the microphone case LH*1 or microphone case RH*2.
*1: for LHD
*2: for RHD
Check the signal waveform according to the condition(s) in the table below.
Item | Condition |
---|---|
Measurement terminal | N15-2 (MCO+) - N15-4 (MCO-) |
Tool setting | 50 mV/DIV., 500 ms/DIV. |
Vehicle condition |
|
*1: for LHD
*2: for RHD
OK |
---|
The waveform is similar to that shown in the illustration. |
Tech Tips
The oscilloscope waveform shown in the illustration is an example for reference only.
Result | |||
---|---|---|---|
|
OK |
REPLACE RADIO RECEIVER ASSEMBLY Click here |
NG |
REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here |