NAVIGATION SYSTEM, Diagnostic DTC:B156A

DTC Code DTC Name
B156A Gateway Disconnected

DESCRIPTION

The multi-media module receiver assembly and network gateway ECU are connected via AVC-LAN communication.

When an AVC-LAN communication error occurs between the multi-media module receiver assembly and network gateway ECU, this DTC will be stored.

DTC No. DTC Detection Condition Trouble Area
B156A Network gateway ECU is not/was not connected while the engine switch is/was on (ACC or IG).

  • Network gateway ECU power source circuit

  • AVC-LAN circuit between multi-media module receiver assembly and network gateway ECU

  • Network gateway ECU

  • Multi-media module receiver assembly

  • Harness or connector

Tech Tips


  • Even if no fault is present, this DTC may be stored depending on the battery condition or engine start voltage.

  • The multi-media module receiver assembly is the master unit.

WIRING DIAGRAM

A015ZV0E35

INSPECTION PROCEDURE

Note


  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System Click here.

PROCEDURE


  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

        Tech Tips


        • Electrical noise from radio waves generated by optional components or the wiring for those components may affect AVC-LAN communication.

        • This DTC may be stored when an AVC-LAN communication error occurs due to electrical noise.


    B

    CHECK DTC Click here

    A

  2. REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)


    1. Remove optional components (including associated wiring).

      Note

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


    NEXT

  3. CHECK DTC


    1. Clear the DTCs Click here.

    2. Recheck for DTCs and check that no DTCs are output.

      OK
      No DTCs are output.

    NG

    CHECK HARNESS AND CONNECTOR (NETWORK GATEWAY ECU POWER SOURCE) Click here

    OK

    END

  4. CHECK HARNESS AND CONNECTOR (NETWORK GATEWAY ECU POWER SOURCE)


    1. Disconnect the J76 network gateway ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J76-24 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J76-10 (BATT) - J76-24 (GND) Always 11 to 14 V
      J76-2 (ACC) - J76-24 (GND) Engine switch on (ACC) 11 to 14 V
      J76-1 (IG) - J76-24 (GND) Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (NETWORK GATEWAY ECU - MULTI-MEDIA MODULE RECEIVER ASSEMBLY)


    1. Disconnect the J76 network gateway ECU connector.

    2. Disconnect the J137 multi-media module receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J76-6 (GTX+) - J137-7 (TX1+) Always Below 1 Ω
      J76-21 (GTX-) - J137-8 (TX1-) Always Below 1 Ω
      J76-6 (GTX+) - Body ground Always 10 kΩ or higher
      J76-21 (GTX-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE NETWORK GATEWAY ECU


    1. Replace the network gateway ECU Click here.

    2. Clear the DTCs Click here.

    3. Recheck for DTCs and check that no DTCs are output.

      OK
      No DTCs are output.

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

    END