RM35X0E _56 Audio / Visual / Telematics _078380 TELEMATICS _0482056 TELEMATICS SYSTEM(for Toyota Connected Services) C

TELEMATICS  TELEMATICS SYSTEM(for Toyota Connected Services)  B157213  Microphone Circuit Open  


DESCRIPTION

This DTC is stored when a microphone signal line is disconnected.

DTC No. Detection Item DTC Detection Condition Trouble Area
B157213 Microphone Circuit Open Current at terminal MCVD is lower than the malfunction threshold for 10 seconds or more while the ignition switch is ON
·

Telematics transceiver

·

Telephone microphone assembly

·

Harness or connector



WIRING DIAGRAM

for High Roof:
E384839E44
0.729,0.854 1.26,1.063 0.531,0.208 10 false MACC 0.813,1.323 1.271,1.531 0.458,0.208 10 false MIC+ 0.823,1.802 1.281,2.01 0.458,0.208 10 false MIC- 0.292,2.333 1.698,2.708 1.406,0.375 10 false Telephone Microphone Assembly 1.313,0.76 1.469,0.958 0.156,0.198 10 false 4 1.313,1.24 1.469,1.438 0.156,0.198 10 false 3 1.313,1.708 1.469,1.906 0.156,0.198 10 false 2 2.063,0.75 2.219,0.948 0.156,0.198 10 false 8 2.073,1.219 2.229,1.417 0.156,0.198 10 false 9 2.073,1.708 2.344,1.927 0.271,0.219 10 false 10 1.521,0.76 2.052,0.969 0.531,0.208 10 false MACC 1.531,1.25 2.063,1.458 0.531,0.208 10 false MCO+ 1.542,1.719 2.073,1.927 0.531,0.208 10 false MCO- 0.396,3.146 0.896,3.417 0.5,0.271 10 false a19 0.406,3.313 2.167,3.656 1.76,0.344 10 false Map Light Assembly 5.646,0.76 5.885,0.958 0.24,0.198 10 false 5 5.646,1.24 5.885,1.438 0.24,0.198 10 false 6 5.656,1.719 5.896,1.917 0.24,0.198 10 false 7 5.615,2.292 5.854,2.49 0.24,0.198 10 false 23 5.938,0.833 6.469,1.042 0.531,0.208 10 false MCVD 5.917,1.323 6.448,1.531 0.531,0.208 10 false MCI+ 5.927,2.385 6.458,2.594 0.531,0.208 10 false SGND 5.917,1.792 6.448,2 0.531,0.208 10 false MCI- 5.521,2.76 6.208,3.073 0.688,0.313 10 false N164 5.51,2.927 6.906,3.625 1.396,0.698 10 false Telematics Transceiver 3.781,2.323 3.938,2.49 0.156,0.167 10 false * 2.49,3.344 3.552,3.573 1.063,0.229 10 false *: Shielded 0.292,2.198 1.698,2.573 1.406,0.375 10 false A

for Standard Roof:
E384839E45
0.729,0.854 1.26,1.063 0.531,0.208 10 false MACC 0.813,1.323 1.271,1.531 0.458,0.208 10 false MIC+ 0.823,1.802 1.281,2.01 0.458,0.208 10 false MIC- 0.292,2.229 1.698,2.604 1.406,0.375 10 false B 1.313,0.76 1.469,0.958 0.156,0.198 10 false 5 1.313,1.24 1.469,1.438 0.156,0.198 10 false 3 1.313,1.708 1.469,1.906 0.156,0.198 10 false 2 2.063,0.75 2.219,0.948 0.156,0.198 10 false 6 2.073,1.219 2.229,1.417 0.156,0.198 10 false 5 2.073,1.708 2.229,1.906 0.156,0.198 10 false 4 1.521,0.76 2.052,0.969 0.531,0.208 10 false MACC 1.531,1.25 2.063,1.458 0.531,0.208 10 false MCO+ 1.542,1.719 2.073,1.927 0.531,0.208 10 false MCO- 0.396,3.146 0.896,3.417 0.5,0.271 10 false a22 0.406,3.313 2.167,3.656 1.76,0.344 10 false Map Light Assembly 5.646,0.76 5.885,0.958 0.24,0.198 10 false 5 5.646,1.24 5.885,1.438 0.24,0.198 10 false 6 5.656,1.719 5.896,1.917 0.24,0.198 10 false 7 5.615,2.292 5.854,2.49 0.24,0.198 10 false 23 5.938,0.833 6.469,1.042 0.531,0.208 10 false MCVD 5.917,1.323 6.448,1.531 0.531,0.208 10 false MCI+ 5.927,2.385 6.458,2.594 0.531,0.208 10 false SGND 5.917,1.792 6.448,2 0.531,0.208 10 false MCI- 5.521,2.76 6.208,3.073 0.688,0.313 10 false N164 5.51,2.927 6.906,3.625 1.396,0.698 10 false Telematics Transceiver 3.781,2.323 3.938,2.49 0.156,0.167 10 false * 2.49,3.344 3.552,3.573 1.063,0.229 10 false *: Shielded 0.292,2.427 1.698,2.802 1.406,0.375 10 false Telephone Microphone Assembly

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 Telematics System.

Click hereAudio / Visual / Telematics>TELEMATICS>TELEMATICS SYSTEM (for Toyota Connected Services)>PRECAUTION

·

When replacing the telematics transceiver, make sure to replace it with a new one.



PROCEDURE

1.CHECK DTC
a.

Turn the ignition switch to ON.


b.

Connect the GTS to the DLC3.


c.

Turn the ignition switch to ON and wait for 10 seconds or more.


d.

Turn the GTS on.


e.

Check for DTCs and check that no DTCs are output.

Click hereAudio / Visual / Telematics>TELEMATICS>TELEMATICS SYSTEM (for Toyota Connected Services)>DTC CHECK / CLEAR

Body Electrical > Telematics > Trouble Codes
50001 459
OK:

No DTCs are output.



Result:
Proceed to
OK
NG



OK

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


NG

2.CHECK TELEMATICS TRANSCEIVER
2.CHECK TELEMATICS TRANSCEIVER
a.
E442560C23
1.385,0.573 1.958,0.885 0.573,0.313 2.479,1.802 2.75,0.958 2.75,0.958 2.917,0.958 true 0.25,0.302 0.563,0.5 0.313,0.198 10 false *a 1.563,0.646 2.104,0.865 0.542,0.219 10 false N164 2.979,0.875 3.406,1.125 0.427,0.25 10 false MCVD
*a Component with harness connected
(Telematics Transceiver)


Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage:
Tester Connection Switch Condition Specified Condition
N164-5 (MCVD) - Body ground Ignition switch ON 4 to 6 V



Result:
Proceed to
OK
NG



OK

3.CHECK MODEL

NG

REPLACE TELEMATICS TRANSCEIVER

Click hereAudio / Visual / Telematics>TELEMATICS>TELEMATICS TRANSCEIVER (for RHD)>REMOVAL


3.CHECK MODEL
a.

Choose the model to be inspected.

Result:
Result Proceed to
for High Roof A
for Standard Roof B




A

4.CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY)

B

9.CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY)
4.CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY)
a.

Disconnect the N164 telematics transceiver connector.


b.

Disconnect the a19 map light assembly connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N164-5 (MCVD) - a19-8 (MACC) Always Below 1 Ω
N164-6 (MCI+) - a19-9 (MCO+) Always Below 1 Ω
N164-7 (MCI-) - a19-10 (MCO-) Always Below 1 Ω
N164-23 (SGND) - Body ground Always 10 kΩ or higher
N164-5 (MCVD) - Body ground Always 10 kΩ or higher
N164-6 (MCI+) - Body ground Always 10 kΩ or higher
N164-7 (MCI-) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

5.CHECK MAP LIGHT ASSEMBLY (OUTPUT TO TELEMATICS TRANSCEIVER)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK MAP LIGHT ASSEMBLY (OUTPUT TO TELEMATICS TRANSCEIVER)
a.
E408556C02
1.542,0.344 1.917,0.594 0.375,0.25 1.135,1.469 0.698,0.792 0.698,0.792 0.552,0.792 true 1.271,1.479 0.927,0.5 0.927,0.5 0.781,0.5 true 0.333,0.417 0.948,0.615 0.615,0.198 10 false MCO+ 0.125,0.708 0.74,0.906 0.615,0.198 10 false MCO- 1.625,0.396 2.24,0.594 0.615,0.198 10 false a19 2.813,3.438 3.427,3.635 0.615,0.198 10 false GND 0.135,0.094 0.75,0.292 0.615,0.198 10 false *a
*a Component with harness connected
(Map Light Assembly)


Check the output waveform.

i.

Remove the map light assembly with the connector(s) still connected.

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT>REMOVAL


ii.

Connect an oscilloscope to terminal a19-9 (MCO+) and a19-10 (MCO-).


iii.

Turn the ignition switch to ACC.


iv.

Check the signal waveform according to the condition(s) in the table below.

Item Condition
Measurement terminal a19-9 (MCO+) - a19-10 (MCO-)
Tool setting 50 mV/DIV., 500 ms/DIV.
Vehicle condition
1.

Turn the ignition switch to ACC.

2.

Sound is input to the map light assembly when the user is closer than 125 mm (4.92 in.) from the map light assembly sound holes.



OK:

The waveform is similar to that shown in the illustration.


HINT:

The oscilloscope waveform shown in the illustration is an example for reference only.




Result:
Proceed to
OK
NG



OK

REPLACE TELEMATICS TRANSCEIVER

Click hereAudio / Visual / Telematics>TELEMATICS>TELEMATICS TRANSCEIVER (for RHD)>REMOVAL


NG

6.INSPECT MAP LIGHT ASSEMBLY
6.INSPECT MAP LIGHT ASSEMBLY
a.
E408555C05
1.469,0.542 1.854,0.792 0.385,0.25 1.479,2.813 1.875,3.063 0.396,0.25 2.229,3.875 2.073,3.875 2.073,3.875 1.885,3.5 true 1.146,1.323 0.896,0.583 0.896,0.583 0.729,0.583 true 1.271,1.323 1.052,0.365 1.052,0.365 0.885,0.365 true 1.406,1.323 1.177,0.146 1.177,0.146 1.01,0.146 true 1.615,3.479 1.521,4.063 1.521,4.063 1.375,4.063 true 2.167,4.104 2.01,4.104 2.01,4.104 1.75,3.49 true 0.167,0.083 0.479,0.281 0.313,0.198 10 false *a 0.302,0.5 0.781,0.708 0.479,0.208 10 false MCO- 1.635,2.854 1.948,3.052 0.313,0.198 10 false A 1.563,0.594 2.042,0.802 0.479,0.208 10 false a19 1.031,3.99 1.51,4.198 0.479,0.208 10 false MIC- 0.448,0.281 0.927,0.49 0.479,0.208 10 false MCO+ 0.573,0.063 1.073,0.281 0.5,0.219 10 false MACC 2.292,3.792 2.792,4.01 0.5,0.219 10 false MACC 2.208,4.031 2.688,4.24 0.479,0.208 10 false MIC+ 0.208,2.771 0.521,2.969 0.313,0.198 10 false *b
*a Component without harness connected
(Map Light Assembly [Wire Harness Side])
*b Component without harness connected
(Map Light Assembly [Telephone Microphone Assembly Side])


Remove the map light assembly.

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT>REMOVAL


b.

Disconnect the telephone microphone assembly connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
a19-8 (MACC) - A-4 (MACC) Always Below 1 Ω
a19-9 (MCO+) - A-3 (MIC+) Always Below 1 Ω
a19-10 (MCO-) - A-2 (MIC-) Always Below 1 Ω
a19-10 (MCO-) - a19-9 (MCO+) Always 10 kΩ or higher
a19-10 (MCO-) - a19-8 (MACC) Always 10 kΩ or higher
a19-9 (MCO+) - a19-8 (MACC) Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.CHECK TELEPHONE MICROPHONE ASSEMBLY

NG

REPLACE MAP LIGHT ASSEMBLY

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT>REMOVAL


7.CHECK TELEPHONE MICROPHONE ASSEMBLY
a.

Replace the telephone microphone assembly with a new or known good one.

Click hereAudio / Visual / Telematics>TELEMATICS>TELEPHONE MICROPHONE ASSEMBLY>REMOVAL


b.

Clear the DTCs.

Click hereAudio / Visual / Telematics>TELEMATICS>TELEMATICS SYSTEM (for Toyota Connected Services)>DTC CHECK / CLEAR

Body Electrical > Telematics > Clear DTCs
50002 459

c.

Recheck for DTCs and check that no DTCs are output.

Click hereAudio / Visual / Telematics>TELEMATICS>TELEMATICS SYSTEM (for Toyota Connected Services)>DTC CHECK / CLEAR

Body Electrical > Telematics > Trouble Codes
50001 459
OK:

No DTCs are output.



Result:
Proceed to
OK
NG



OK

END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

NG

8.REPLACE TELEMATICS TRANSCEIVER
9.CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY)
a.

Disconnect the N164 telematics transceiver connector.


b.

Disconnect the a22 map light assembly connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N164-5 (MCVD) - a22-6 (MACC) Always Below 1 Ω
N164-6 (MCI+) - a22-5 (MCO+) Always Below 1 Ω
N164-7 (MCI-) - a22-4 (MCO-) Always Below 1 Ω
N164-23 (SGND) - Body ground Always 10 kΩ or higher
N164-5 (MCVD) - Body ground Always 10 kΩ or higher
N164-6 (MCI+) - Body ground Always 10 kΩ or higher
N164-7 (MCI-) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

10.CHECK MAP LIGHT ASSEMBLY (OUTPUT TO TELEMATICS TRANSCEIVER)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK MAP LIGHT ASSEMBLY (OUTPUT TO TELEMATICS TRANSCEIVER)
a.
E419877C01
1.344,0.354 1.719,0.604 0.375,0.25 1.76,1.208 2.281,0.49 2.281,0.49 2.49,0.49 true 1.615,1.198 2.198,0.219 2.198,0.219 2.406,0.219 true 2.479,0.146 3.094,0.344 0.615,0.198 10 false MCO+ 1.417,0.375 2.031,0.573 0.615,0.198 10 false a22 2.813,3.438 3.427,3.635 0.615,0.198 10 false GND 0.135,0.094 0.75,0.292 0.615,0.198 10 false *a 2.552,0.417 3.167,0.615 0.615,0.198 10 false MCO-
*a Component with harness connected
(Map Light Assembly)


Remove the map light assembly with the connector(s) still connected.

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT (for Wagon)>REMOVAL


b.

Connect an oscilloscope to terminal a22-5 (MCO+) and a22-4 (MCO-).


c.

Check the signal waveform according to the condition(s) in the table below.

Item Condition
Measurement terminal a22-5 (MCO+) - a22-4 (MCO-)
Tool setting 50 mV/DIV., 500 ms/DIV.
Vehicle condition
1.

Turn the ignition switch to ACC.

2.

Sound is input to the map light assembly when the user is closer than 125 mm (4.92 in.) from the map light assembly sound holes.



OK:

The waveform is similar to that shown in the illustration.


HINT:

The oscilloscope waveform shown in the illustration is an example for reference only.



Result:
Proceed to
OK
NG



OK

REPLACE TELEMATICS TRANSCEIVER

Click hereAudio / Visual / Telematics>TELEMATICS>TELEMATICS TRANSCEIVER (for RHD)>REMOVAL


NG

11.INSPECT MAP LIGHT ASSEMBLY
11.INSPECT MAP LIGHT ASSEMBLY
a.
E419874C09
1.458,0.396 1.844,0.646 0.385,0.25 1.5,2.823 1.885,3.073 0.385,0.25 1.979,1.365 2.396,0.427 2.396,0.427 2.594,0.427 true 1.656,1.375 0.969,0.542 0.969,0.542 0.781,0.542 true 1.5,3.49 1.365,4.156 1.365,4.156 1.177,4.156 true 1.938,3.51 2.063,3.792 2.063,3.792 2.26,3.792 true 1.635,3.5 1.833,4.115 1.833,4.115 2.031,4.115 true 1.792,1.375 2.24,0.146 2.24,0.146 2.438,0.146 true 0.104,0.125 0.417,0.323 0.313,0.198 10 false *a 0.125,2.458 0.458,2.656 0.333,0.198 10 false *b 2.677,0.344 3.177,0.563 0.5,0.219 10 false MCO- 2.49,0.063 2.969,0.271 0.479,0.208 10 false MCO+ 1.552,0.438 2.031,0.646 0.479,0.208 10 false a22 1.646,2.875 2.125,3.083 0.479,0.208 10 false B 0.323,0.469 0.823,0.688 0.5,0.219 10 false MACC 2.333,3.719 2.813,3.927 0.479,0.208 10 false MACC 2.104,4.042 2.583,4.25 0.479,0.208 10 false MIC+ 0.833,4.073 1.313,4.281 0.479,0.208 10 false MIC-
*a Component without harness connected
(Map Light Assembly [Wire Harness Side])
*b Component without harness connected
(Map Light Assembly [Telephone Microphone Assembly Side])


Remove the map light assembly.

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT (for Wagon)>REMOVAL


b.

Disconnect the telephone microphone assembly connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
a22-6 (MACC) - B-5 (MACC) Always Below 1 Ω
a22-5 (MCO+) - B-3 (MIC+) Always Below 1 Ω
a22-4 (MCO-) - B-2 (MIC-) Always Below 1 Ω
a22-4 (MCO-) - a22-5 (MCO+) Always 10 kΩ or higher
a22-4 (MCO-) - a22-6 (MACC) Always 10 kΩ or higher
a22-5 (MCO+) - a22-6 (MACC) Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.CHECK TELEPHONE MICROPHONE ASSEMBLY

NG

REPLACE MAP LIGHT ASSEMBLY

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT (for Wagon)>REMOVAL