Dtc B1579 Voice Recognition Microphone Disconnected

Audio Visual Telematics. Corolla. Zre142 Aze141
Navigation Multi Info Display. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))

INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)

REPLACE TELEPHONE MICROPHONE ASSEMBLY

DTC B1579 Voice Recognition Microphone Disconnected


DESCRIPTION

The radio and display receiver assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines (w/o Sliding Roof).
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 (w/ Sliding Roof).
This DTC is stored when a microphone connection detection signal line is disconnected.

DTC Code
DTC Detection Condition
Trouble Area
B1579
Telephone microphone signal is lost.
  1. Map light assembly*1
  2. Telephone microphone assembly
  3. Radio and display receiver assembly
  4. Harness or connector
  1. *1: w/ Sliding Roof

WIRING DIAGRAM


Corolla. Zre142 Aze141.Navigation Multi Info Display.Navigation System. Dtc B1579 Voice Recognition Microphone Disconnected


INSPECTION PROCEDURE

NOTICE:
After replacing the radio and display receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, XM radio ID registration is necessary (w/ SDARS System).
1.INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    Corolla. Zre142 Aze141.Navigation Multi Info Display.Navigation System. Dtc B1579 Voice Recognition Microphone Disconnected

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E129-19 (MIC-) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Component with harness connected
    (Radio and Display Receiver Assembly)

  1. Proceed to the next step based on the check result.

    Result:
    Result
    		Proceed to
    NG
    		A
    OK (w/o Sliding Roof)
    		B
    OK (w/ Sliding Roof)
    		C


B
Go to step 2

C
Go to step 3
A

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (COROLLA_ZRE142 RM000002XAJ01EX.html)

2.CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)

  1. Disconnect the radio and display receiver assembly connector.

  1. Disconnect the telephone microphone assembly connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E129-6 (SNS2) - O9-3 (SNS2)
    		Always
    		Below 1 Ω
    E129-19 (MIC-) - O9-4 (MIC-)
    		Always
    		Below 1 Ω
    E129-6 (SNS2) - Body ground
    		Always
    		10 kΩ or higher
    E129-19 (MIC-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TELEPHONE MICROPHONE ASSEMBLY (COROLLA_ZRE142 RM000001Q0103IX.html)

3.CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))

  1. Disconnect the radio and display receiver assembly connector.

  1. Disconnect the map light assembly (telephone microphone assembly) connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E129-6 (SNS2) - O10-9 (SNS2)
    		Always
    		Below 1 Ω
    E129-19 (MIC-) - O10-10 (MIC-)
    		Always
    		Below 1 Ω
    E129-6 (SNS2) - Body ground
    		Always
    		10 kΩ or higher
    E129-19 (MIC-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    Corolla. Zre142 Aze141.Navigation Multi Info Display.Navigation System. Dtc B1579 Voice Recognition Microphone Disconnected

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    O10-9 (SNS2) - O10-10 (MIC-)
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Component without harness connected
    (Map Light Assembly (Telephone Microphone Assembly))


NG
Go to step 5
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (COROLLA_ZRE142 RM000002XAJ01EX.html)

5.REPLACE TELEPHONE MICROPHONE ASSEMBLY

  1. Replace the telephone microphone assembly (COROLLA_ZRE142 RM000001Q0103IX.html).

  1. Clear the DTCs (COROLLA_ZRE142 RM0000011BU0JUX.html).

  1. Recheck for DTCs and check if the same DTC is output again.

    OK:
    No DTCs are output.


NG
REPLACE MAP LIGHT ASSEMBLY (COROLLA_ZRE142 RM00000340O00PX.html)
OK

END