NAVIGATION SYSTEM (for HDD), Diagnostic DTC:B15D8

DTC Code DTC Name
B15D8 Monitor Disconnected

DESCRIPTION

The navigation receiver assembly and parking assist ECU are connected by the AVC-LAN communication line.

When an AVC-LAN communication error occurs between the navigation receiver assembly and parking assist ECU, this DTC will be stored.

DTC No. DTC Detection Condition Trouble Area
B15D8 Parking assist ECU is not/was not connected while the power switch is turned to on (ACC or IG).

  • Parking assist ECU power source circuit

  • AVC-LAN circuit between navigation receiver assembly and parking assist ECU

  • Parking assist ECU

  • Navigation receiver assembly

Tech Tips

The navigation receiver assembly is the master unit.

WIRING DIAGRAM

A01JB93E06

INSPECTION PROCEDURE

Note

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

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 if the same DTC is output again.

      OK
      No DTCs are output.

    NG

    CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU POWER SOURCE) Click here

    OK

    END

  4. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU POWER SOURCE)


    1. A01JCQEE07
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Parking Assist ECU)

      Disconnect the L65 parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L65-3 (GND1) - 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
      L65-1 (+B) - L65-3 (GND1) Power switch off 11 to 14 V
      L65-7 (IG) - L65-3 (GND1) Power switch on (IG) 11 to 14 V
      L65-8 (ACC) - L65-3 (GND1) Power switch on (ACC) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - NAVIGATION RECEIVER ASSEMBLY)


    1. A01JCQEE08

      Disconnect the L65 parking assist ECU connector.

    2. A01J9R6E47

      Disconnect the L109 navigation receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L65-25 (TX+) - L109-9 (TX1+) Always Below 1 Ω
      L65-24 (TX-) - L109-10 (TX1-) Always Below 1 Ω
      L65-25 (TX+) - Body ground Always 10 kΩ or higher
      L65-24 (TX-) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Parking Assist ECU)
      *2

      Front view of wire harness connector

      (to Navigation Receiver Assembly)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE PARKING ASSIST ECU


    1. Replace the parking assist ECU Click here.

    2. Clear the DTCs Click here.

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

      OK
      No DTCs are output.

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

    END