Toyota Corolla Cross: Voice Recognition Microphone2 Circuit Open (B154913)
DESCRIPTION
The telephone microphone assembly RH is connected to the radio and display receiver assembly via voice recognition microphone 2 signal detection line.
This DTC is stored when the radio and display receiver assembly detects disconnection of telephone microphone assembly RH.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
Priority |
|---|---|---|---|---|---|
|
B154913 |
Voice Recognition Microphone2 Circuit Open |
Voice recognition microphone 2 terminal (SNS2) disconnected (2 trip detection logic) |
|
Navigation System |
A |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed.
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PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY RH) |
(a) Disconnect the I254 radio and display receiver assembly connector.
(b) Disconnect the T34 telephone microphone assembly RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T34-5 (SNS2) - I254-21 (SNS2) |
Always |
Below 1 Ω |
|
T34-4 (MO2-) - I254-18 (MI2-) |
Always |
Below 1 Ω |
|
T34-5 (SNS2) - Body ground |
Always |
10 kΩ or higher |
|
T34-4 (MO2-) - Body ground |
Always |
10 kΩ or higher |
| NG | .gif)
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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|
2. |
INSPECT RADIO & DISPLAY RECEIVER ASSEMBLY (MI2-) |
(a) With the radio and display receiver assembly connectors connected, disconnect the T34 telephone microphone assembly RH connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T34-4 (MO2-) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY |
|
|
3. |
INSPECT TELEPHONE MICROPHONE ASSEMBLY RH (SNS2, MO2-) |
|
(a) Remove the telephone microphone assembly RH. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
5 (SNS2) - 4 (MO2-) |
Always |
Below 1 Ω |
| OK |
|
REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY |
| NG |
|
REPLACE TELEPHONE MICROPHONE ASSEMBLY RH |
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