NAVIGATION SYSTEM (for Navigation Receiver Type), Diagnostic DTC:B15D8

DTC Code DTC Name
B15D8 Monitor Disconnected

DESCRIPTION

The navigation ECU sub-assembly and parking assist ECU are connected via AVC-LAN communication.

When an AVC-LAN communication error occurs between the navigation ECU sub-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/was on (ACC or IG).

  • Parking assist ECU power source circuit

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

  • Parking assist ECU

  • Navigation ECU sub-assembly

  • Harness or connector

Tech Tips


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

  • The navigation ECU sub-assembly is the master unit.

WIRING DIAGRAM

A0040BOE16

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 or operations that are performed during vehicle inspection or maintenance, calibration of other systems may be needed 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 (PARKING ASSIST ECU POWER SOURCE) Click here

    OK

    END

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


    1. Disconnect the L60 parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L60-4 (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
      L60-1 (+B) - L60-4 (GND1) Power switch off 11 to 14 V
      L60-8 (IG) - L60-4 (GND1) Power switch on (IG) 11 to 14 V
      L60-9 (ACC) - L60-4 (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 ECU SUB-ASSEMBLY)


    1. Disconnect the L60 parking assist ECU connector.

    2. Disconnect the L28 navigation ECU sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L60-11 (TX+) - L28-3 (TX3+) Always Below 1 Ω
      L60-10 (TX-) - L28-4 (TX3-) Always Below 1 Ω
      L60-11 (TX+) - Body ground Always 10 kΩ or higher
      L60-10 (TX-) - Body ground Always 10 kΩ or higher

    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 that no DTCs are output.

      OK
      No DTCs are output.

    NG

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

    OK

    END