DESCRIPTION
Microphone signal from the telephone microphone assembly is sent to the radio and display receiver assembly.
Also, power is supplied from the radio and display receiver assembly to the telephone microphone assembly.
If microphone signal is disconnected, this DTC is stored.
This DTC is stored when a malfunction occurs in a connected device.
DTC Code | DTC Detection Condition | Trouble Area |
---|---|---|
B1579 | Telephone microphone signal is lost. |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
Tech Tips
For vehicles equipped with an Extension Module, refer to optional equipment's manuals.
PROCEDURE
CHECK MICROPHONE (OPERATION CHECK)
Enter the "Microphone & Voice Recognition Check" screen Click here.
When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
OK |
---|
Check result is normal. |
NG |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER - MAP LIGHT) Click here |
OK |
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER - MAP LIGHT)
Disconnect the R19 radio and display receiver assembly connector.
Disconnect the M4 map light assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY
*a | Component with harness connected (Radio and Display Receiver Assembly) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||
---|---|---|---|---|---|---|---|
|
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here |
OK |
REPLACE TELEPHONE MICROPHONE WITH ANOTHER AND CHECK
Replace the telephone microphone with a normal one Click here.
Check if the same problem occurs again.
OK |
---|
Malfunction disappears. |
NG |
REPLACE MAP LIGHT ASSEMBLY Click here |
OK |
END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)