RM38T0EC _56 Audio / Visual / Telematics _115231 TELEMATICS _0512170 TELEMATICS SYSTEM(for TOYOTA Connect) C

TELEMATICS  TELEMATICS SYSTEM(for TOYOTA Connect)  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

E364325E73
1.406,0.823 1.969,1.031 0.563,0.208 10 false MCVD 1.469,1.271 1.906,1.479 0.438,0.208 10 false MCI+ 1.5,1.74 1.917,1.948 0.417,0.208 10 false MCI- 1.417,2.198 1.896,2.417 0.479,0.219 10 false SGND 1.896,0.833 2.25,1.042 0.354,0.208 10 false 5 1.896,1.271 2.323,1.49 0.427,0.219 10 false 6 1.896,1.74 2.208,1.979 0.313,0.24 10 false 7 1.896,2.198 2.25,2.417 0.354,0.219 10 false 23 0.49,2.771 0.948,2.979 0.458,0.208 10 false I200 0.49,2.958 2.51,3.167 2.021,0.208 10 false Telematics Transceiver 3.948,0.823 4.26,1.031 0.313,0.208 10 false 1 3.958,1.281 4.25,1.49 0.292,0.208 10 false 2 3.958,1.74 4.26,1.979 0.302,0.24 10 false 4 4.156,0.833 4.719,1.042 0.563,0.208 10 false MAC1 4.156,1.281 4.719,1.49 0.563,0.208 10 false MO1+ 4.177,1.74 4.74,1.948 0.563,0.208 10 false MO1- 4.083,2.625 4.521,2.844 0.438,0.219 10 false T32 4.094,2.813 6.792,3.073 2.698,0.26 10 false Telephone Microphone Assembly 2.896,2.198 3.333,2.417 0.438,0.219 10 false * 0.208,3.427 1.563,3.719 1.354,0.292 10 false *: Shielded

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 Connect)>PRECAUTION

·

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

·

Before replacing the telematics transceiver, refer to Service Bulletin.



PROCEDURE

1.CHECK DTC
a.

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


b.

Clear the DTCs.

Body Electrical > Telematics > Clear DTCs
50002 459

c.

Check for DTCs and check that no DTCs are output.

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 HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - TELEPHONE MICROPHONE ASSEMBLY)
2.CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - TELEPHONE MICROPHONE ASSEMBLY)
a.

Disconnect the I200 telematics transceiver connector.


b.

Disconnect the T32 telephone microphone assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I200-5 (MCVD) - T32-1 (MAC1) Always Below 1 Ω
I200-6 (MCI+) - T32-2 (MO1+) Always Below 1 Ω
I200-7 (MCI-) - T32-4 (MO1-) Always Below 1 Ω
I200-5 (MCVD) or T32-1 (MAC1) - Body ground Always 10 kΩ or higher
I200-6 (MCI+) or T32-2 (MO1+) - Body ground Always 10 kΩ or higher
I200-7 (MCI-) or T32-4 (MO1-) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

3.CHECK TELEMATICS TRANSCEIVER (TELEPHONE MICROPHONE ASSEMBLY POWER SOURCE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK TELEMATICS TRANSCEIVER (TELEPHONE MICROPHONE ASSEMBLY POWER SOURCE)
a.
E364326C35
1.5,0.219 1.885,0.448 0.385,0.229 2.458,1.885 2.198,1.375 true 1.146,1.917 1.458,1.385 true 1.563,0.25 2.083,0.573 0.521,0.323 10 false T32 0.198,0.167 0.427,0.354 0.229,0.188 10 false *a 2.333,1.906 2.75,2.063 0.417,0.156 10 false MAC1 0.969,1.927 1.375,2.135 0.406,0.208 10 false MO1-
*a Component with harness connected
(Telephone Microphone Assembly)


Remove the telephone microphone assembly but do not disconnect the connectors.

Click hereAudio / Visual / Telematics>AUDIO / VIDEO>MICROPHONE>REMOVAL


b.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
T32-1 (MAC1) - Body ground Ignition switch ON 7.5 to 8.5 V


Standard Resistance:
Tester Connection Condition Specified Condition
T32-4 (MO1-) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE TELEPHONE MICROPHONE ASSEMBLY

Click hereAudio / Visual / Telematics>AUDIO / VIDEO>MICROPHONE>REMOVAL


NG

4.REPLACE TELEMATICS TRANSCEIVER