NAVIGATION SYSTEM, Diagnostic DTC:B15D8

DTC Code DTC Name
B15D8 Monitor Disconnected

DESCRIPTION

The parking assist ECU and radio and display receiver assembly are connected by an AVC-LAN communication line. When an AVC-LAN communication error occurs between the radio and display receiver assembly and parking assist ECU, these DTCs will be stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15D8

Monitor Disconnected

A device that is listed in the AVC-LAN connected device record of the master unit is missing.

  • AVC-LAN circuit

  • Parking assist ECU

  • Radio and display receiver assembly
Tip:

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

  • The radio and display receiver assembly is the master unit.

WIRING DIAGRAM

E330588E04

CAUTION / NOTICE / HINT

Note:

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

  • Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections

    Click hereClick hereClick here

PROCEDURE

  1. CLEAR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Navigation System > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  2. CHECK FOR DTC

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

      Click here

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTCs are output.

    Result

    Proceed to

    OK

    NG
    OK

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    NG

  3. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BATTERY AND BODY GROUND)

    1. E297790C12

      *a

      Front view of harness connector (to Parking Assist ECU)

      Disconnect the parking assist ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      a2-3 (GND1) - Body ground

      Always

      Below 1 Ω

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      a2-2 (+B) - a2-3 (GND1)

      Power switch off

      11 to 14 V

      a2-6 (IG) - a2-3 (GND1)

      Power switch on (IG)

      11 to 14 V

      a2-1 (ACC) - a2-3 (GND1)

      Power switch on (ACC)

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

    1. E333570E01

      Remove the radio and display receiver assembly.

      Click here

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      7 (TX3+) - 8 (TX3-)

      Always

      60 to 80 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    Click here

    OK

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

    1. Disconnect the G159 radio and display receiver assembly connector.

    2. Disconnect the a2 parking assist ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G159-7 (TX3+) - a2-10 (TX+)

      Always

      Below 1 Ω

      G159-8 (TX3-) - a2-9 (TX-)

      Always

      Below 1 Ω

      G159-7 (TX3+) - Body ground

      Always

      10 kΩ or higher

      G159-8 (TX3-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE PARKING ASSIST ECU

    1. Replace the parking assist ECU with a new or normally functioning one.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  7. CLEAR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Navigation System > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  8. CHECK FOR DTC

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

      Click here

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTCs are output.

    Result

    Proceed to

    OK

    NG
    OK

    END (PARKING ASSIST ECU IS DEFECTIVE)

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    Click here