| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000026OZV |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for 8 Inch Display Type (w/ Single Knob Type) or 10.5 Inch Display Type): B157913; Voice Recognition Microphone1 Circuit Open; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] | ||
|
DTC |
B157913 |
Voice Recognition Microphone1 Circuit Open |
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 |
- *: w/ DCM (Telematics Transceiver)
WIRING DIAGRAM
w/ DCM (Telematics Transceiver)
w/o DCM (Telematics Transceiver)
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the telematics transceiver, make sure to replace it with a new one (w/ Telematics Transceiver).
-
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed.
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![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for 8 Inch Display Type (w/ Single Knob Type) or 10.5 Inch Display Type): PRECAUTION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK MODEL |
|
Result |
Proceed to |
|---|---|
|
w/ DCM(Telematics Transceiver) |
A |
|
w/o DCM (Telematics transceiver) |
B |
| B |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (TELEPHONE MICROPHONE ASSEMBLY LH - RADIO AND DISPLAY RECEIVER ASSEMBLY, TELEMATICS TRANSCEIVER) |
(a) Disconnect the T24 telephone microphone assembly LH connector.
(b) Disconnect the I175 radio and display receiver assembly connector.
(c) Disconnect the I143 telematics transceiver connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T24-5 (SNS1) - I175-25 (SNS) |
Always |
Below 1 Ω |
|
T24-4 (MO1-) - I143-7 (MCI-) |
Always |
Below 1 Ω |
|
T24-5 (SNS1) or I175-25 (SNS) - Body ground |
Always |
10 kΩ or higher |
|
T24-4 (MO1-) or I143-7 (MCI-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
INSPECT TELEMATICS TRANSCEIVER (MCI-) |
(a) With the I143 telematics transceiver connectors connected, disconnect the T24 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 |
|---|---|---|
|
T24-4 (MO1-) - Body ground |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPLACE DCM (TELEMATICS TRANSCEIVER)
|
|
4. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY LH) |
(a) Disconnect the I175 radio and display receiver assembly connector.
(b) Disconnect the T24 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 |
|---|---|---|
|
T24-5 (SNS1) - I175-25 (SNS) |
Always |
Below 1 Ω |
|
T24-4 (MO1-) - I143-7 (MCI-) |
Always |
Below 1 Ω |
|
T24-5 (SNS1) or I175-25 (SNS) - Body ground |
Always |
10 kΩ or higher |
|
T24-4 (MO1-) or I143-7 (MCI-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
INSPECT RADIO & DISPLAY RECEIVER ASSEMBLY (MIN-) |
(a) With the I175 radio and display receiver assembly connectors connected, disconnect the T24 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 |
|---|---|---|
|
T24-4 (MO1-) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
|
|
|
6. |
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
|
|
|