Dtc B156C Extension Module Disconnected

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

CHECK DTC

CHECK HARNESS AND CONNECTOR (EXTENSION MODULE POWER SOURCE)

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EXTENSION MODULE)

REPLACE EXTENSION MODULE

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EXTENSION MODULE)

DTC B156C Extension Module Disconnected


DESCRIPTION

The extension module and the radio and display receiver assembly are connected by the AVC-LAN communication line.
When an AVC-LAN communication error occurs between the extension module and the radio and display receiver assembly, this DTC will be stored.

DTC No.
DTC Detection Condition
Trouble Area
B156C
When either condition below is met:
  1. Extension module is/was not connected while the ignition switch is/was ON or ACC.
  2. Communication between the master unit and the extension module is not possible when the engine is/was started.
  1. Extension module power source circuit
  2. AVC-LAN circuit between radio and display receiver assembly and extension module
  3. Extension module
  4. Radio and display receiver assembly
  5. Harness or connector
HINT:
The radio and display receiver assembly is the master unit.

WIRING DIAGRAM


Corolla. Zre142 Aze141.Navigation Multi Info Display.Navigation System. Dtc B156C Extension Module 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.CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

  1. Check for optional components.

    1. Check that optional components (including associated wiring) which generate radio waves are not installed.

      Result:
      Result
      		Proceed to
      Optional components (including associated wiring) are installed.
      		A
      Optional components (including associated wiring) are not installed.
      		B
      HINT:
      1. Electrical noise from radio waves generated by optional components or the wiring for those components may affect AVC-LAN communication.
      2. This DTC may be stored when an AVC-LAN communication error occurs due to electrical noise.


B
Go to step 3
A


2.REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

  1. Remove optional components (including associated wiring).

    NOTICE:
    Do not remove optional components or associated wiring without the permission of the customer.

NEXT


3.CHECK DTC

  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
Go to step 4
OK

END

4.CHECK HARNESS AND CONNECTOR (EXTENSION MODULE POWER SOURCE)

  1. Disconnect the extension module connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    f1-32 (E) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    f1-16 (B+) - f1-32 (E)
    		Always
    		11 to 14 V
    f1-11 (ACC) - f1-32 (E)
    		Ignition switch ACC
    		11 to 14 V


NG
Go to step 7
OK


5.CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EXTENSION MODULE)

  1. Disconnect the radio and display receiver assembly connector.

  1. Disconnect the extension module connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    f1-2 (AVC+) - f3-9 (AVC+)
    		Always
    		Below 1 Ω
    f1-3 (AVC-) - f3-10 (AVC-)
    		Always
    		Below 1 Ω
    f1-2 (AVC+) - Body ground
    		Always
    		10 kΩ or higher
    f1-3 (AVC-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.REPLACE EXTENSION MODULE

  1. Replace the extension module (COROLLA_ZRE142 RM000002XAJ01FX.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 RADIO AND DISPLAY RECEIVER ASSEMBLY (COROLLA_ZRE142 RM000002XAJ01EX.html)
OK

END

7.CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EXTENSION MODULE)

  1. Disconnect the radio and display receiver assembly connector.

  1. Disconnect the extension module connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    f1-11 (ACC) - f2-13 (ACC)
    		Always
    		Below 1 Ω
    f1-16 (B+) - f2-1 (B+)
    		Always
    		Below 1 Ω
    f1-32 (E) - f2-14 (E)
    		Always
    		Below 1 Ω
    f1-11 (ACC) - Body ground
    		Always
    		10 kΩ or higher
    f1-16 (B+) - Body ground
    		Always
    		10 kΩ or higher
    f1-32 (E) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

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