Toyota CH-R Service Manual: Voice Recognition Microphone Disconnected (B1579)
DESCRIPTION
The radio and display receiver assembly and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.
This DTC is stored when a microphone connection detection signal line is disconnected.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
B1579 |
Voice Recognition Microphone Disconnected |
Telephone microphone signal is lost. |
|
- *: w/ Manual (SOS) Switch
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the radio and display receiver assembly or navigation
ECU, always replace it with a new one. If a radio and display receiver assembly
or navigation ECU which was installed to another vehicle is used, the following
may occur:
- A communication malfunction DTC is stored.
- The radio and display receiver assembly or navigation ECU may not operate normally.
- If the DCM (telematics transceiver) has been replaced, perform the DCM Activation procedure using the Techstream (w/ Manual (SOS) Switch).
PROCEDURE
|
1. |
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG | .gif) |
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
.gif)
|
2. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
w/ Manual (SOS) Switch |
A |
|
w/o Manual (SOS) Switch |
B |
| B | |
GO TO STEP 7 |
|
|
3. |
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) |
(a) Disconnect the F134 DCM (telematics transceiver) connector.
(b) Disconnect the R2 map light assembly (telephone microphone assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F134-35 (MIC-) - R2-7 (MCO-) |
Always |
Below 1 Ω |
|
F134-35 (MIC-) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) |
(a) Disconnect the F131 radio and display receiver assembly connector.
(b) Disconnect the F134 DCM (telematics transceiver) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F131-22 (MIN-) - F134-19 (MCO-) |
Always |
Below 1 Ω |
|
F131-22 (MIN-) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) |
(a) Disconnect the F131 radio and display receiver assembly connector.
(b) Disconnect the R2 map light assembly (telephone microphone assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F131-25 (SNS2) - R2-1 (SNS2) |
Always |
Below 1 Ω |
|
F131-25 (SNS2) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
INSPECT DCM (TELEMATICS TRANSCEIVER) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | |
GO TO STEP 8 |
| NG | |
REPLACE DCM (TELEMATICS TRANSCEIVER) |
|
7. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) |
(a) Disconnect the F131 radio and display receiver assembly connector.
(b) Disconnect the R2 map light assembly (telephone microphone assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F131-25 (SNS2) - R2-1 (SNS2) |
Always |
Below 1 Ω |
|
F131-22 (MIN-) - R2-7 (MCO-) |
Always |
Below 1 Ω |
|
F131-25 (SNS2) - Body ground |
Always |
10 kΩ or higher |
|
F131-22 (MIN-) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) |
(a) Remove the map light assembly (telephone microphone assembly).
Click here
.gif)
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | |
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
| NG | |
REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) |
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DESCRIPTION
This DTC is stored when a malfunction occurs in a connected device.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
...
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DESCRIPTION
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receiver assembly and combination meter assembly.
DTC No.
Detection Item
...
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Toyota C-HR (AX20) 2023-2026 Owner's Manual
Toyota CH-R Owners Manual
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- Instrument cluster
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Toyota CH-R Service Manual
- Introduction
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