Toyota Corolla Cross: Voice Recognition Microphone1 Circuit Open (B157913)
DESCRIPTION
The telephone microphone assembly LH is connected to the radio and display receiver assembly via voice recognition microphone 1 signal detection line.
This DTC is stored when the radio and display receiver assembly detects disconnection of telephone microphone assembly LH.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
Priority |
|---|---|---|---|---|---|
|
B157913 |
Voice Recognition Microphone1 Circuit Open |
Voice recognition microphone 1 terminal (SNS) disconnected (2 trip detection logic) |
|
Navigation System |
A |
- *1: w/ Telematics Transceiver
WIRING DIAGRAM
w/ Telematics Transceiver
w/o Telematics Transceiver 
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the telematics transceiver, make sure to replace it with a new one.
- Depending on the parts that are replaced during vehicle inspection or
maintenance, performing initialization, registration or calibration may
be needed.
Click here
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PROCEDURE
|
1. |
CHECK MODEL |
|
Result |
Proceed to |
|---|---|
|
w/ Telematics Transceiver |
A |
|
w/o Telematics Transceiver |
B |
| B | .gif)
|
GO TO STEP 5 |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (TELEPHONE MICROPHONE ASSEMBLY LH - RADIO AND DISPLAY RECEIVER ASSEMBLY, TELEMATICS TRANSCEIVER) |
(a) Disconnect the T30 telephone microphone assembly LH connector.
(b) Disconnect the I253 radio and display receiver assembly connector.
(c) Disconnect the I200 telematics transceiver connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T30-5 (SNS1) - I253-25 (SNS) |
Always |
Below 1 Ω |
|
T30-4 (MO1-) - I200-7 (MCI-) |
Always |
Below 1 Ω |
|
T30-5 (SNS1) - Body ground |
Always |
10 kΩ or higher |
|
T30-4 (MO1-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
INSPECT TELEMATICS TRANSCEIVER (MCI-) |
(a) With the telematics transceiver connector connected, disconnect the T30 telephone microphone assembly LH connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T30-4 (MO1-) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPLACE TELEMATICS TRANSCEIVER |
|
|
4. |
INSPECT TELEPHONE MICROPHONE ASSEMBLY LH (SNS1, MO1-) |
|
(a) Remove the telephone microphone assembly LH. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
5 (SNS1) - 4 (MO1-) |
Always |
Below 1 Ω |
| OK |
|
REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY |
| NG |
|
REPLACE TELEPHONE MICROPHONE ASSEMBLY LH |
|
5. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY LH) |
(a) Disconnect the I253 radio and display receiver assembly connector.
(b) Disconnect the T30 telephone microphone assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T30-5 (SNS1) - I253-25 (SNS) |
Always |
Below 1 Ω |
|
T30-4 (MO1-) - I253-22 (MIN-) |
Always |
Below 1 Ω |
|
T30-5 (SNS1) - Body ground |
Always |
10 kΩ or higher |
|
T30-4 (MO1-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
INSPECT RADIO AND DISPLAY ASSEMBLY (MIN-) |
(a) With the radio and display receiver assembly connectors connected, disconnect the T30 telephone microphone assembly LH connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T30-4 (MO1-) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPLACE RADIO AND DISPLAY ASSEMBLY |
|
|
7. |
INSPECT TELEPHONE MICROPHONE ASSEMBLY LH (SNS1, MO1-) |
|
(a) Remove the telephone microphone assembly LH. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
5 (SNS1) - 4 (MO1-) |
Always |
Below 1 Ω |
| OK |
|
REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY |
| NG |
|
REPLACE TELEPHONE MICROPHONE ASSEMBLY LH |
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Disassembly
DISASSEMBLY CAUTION / NOTICE / HINT COMPONENTS (DISASSEMBLY)
Procedure Part Name Code
1 NO. 1 MOULDING TAPE
75895A -
- -
2 FRONT PILLAR COVER PROTECTOR
61992 -
- -
*1 FRONT PILLAR UPPER COVER
- -
● Non-r
