Dtc B15D8 Monitor Disconnected


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK DTC

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

INSPECT NAVIGATION RECEIVER ASSEMBLY

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

REPLACE PARKING ASSIST ECU

CLEAR DTC

CHECK DTC

DTC B15D8 Monitor Disconnected


DESCRIPTION

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

DTC Code
DTC Detection Condition
Trouble Area
B15D8*
A device that is listed in the AVC-LAN connected device record of the master unit is missing.
  1. Parking assist ECU power source circuit
  2. AVC-LAN circuit
  3. Parking assist ECU
  4. Navigation receiver assembly
HINT:
  1. *: Even if no fault is present, this DTC may be stored depending on the battery condition or engine start voltage.
  2. The navigation receiver assembly is the master unit.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Navigation Multi Info Display.Navigation System (For Radio And Display Type). Dtc B15D8 Monitor Disconnected


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
When replacing the navigation receiver assembly, it is necessary to perform the vehicle contract setting for Connected Services (w/ Connected Services Function).
1.CLEAR DTC

  1. Clear the DTCs (LandCruiser RM0000011BU0W7X.html).


NEXT


2.CHECK DTC

  1. Recheck for DTCs and check if the same DTC is output again (LandCruiser RM0000011BU0W7X.html).

    OK:
    No DTCs are output.


NG
Go to step 3
OK

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)

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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Navigation Multi Info Display.Navigation System (For Radio And Display Type). Dtc B15D8 Monitor Disconnected

  1. Disconnect the parking assist ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    I6-4 (GND1) - 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
    I6-1 (+B) - I6-4 (GND1)
    		Always
    		11 to 14 V
    I6-8 (IG) - I6-4 (GND1)
    		Engine switch on (IG)
    		11 to 14 V
    I6-9 (ACC) - I6-4 (GND1)
    		Engine switch on (ACC)
    		11 to 14 V
Text in Illustration
*a
Front view of wire harness connector
(to Parking Assist ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT NAVIGATION RECEIVER ASSEMBLY


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Navigation Multi Info Display.Navigation System (For Radio And Display Type). Dtc B15D8 Monitor Disconnected

  1. Remove the navigation receiver assembly (LandCruiser RM000003B6H02GX.html).

  1. 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


NG
REPLACE NAVIGATION RECEIVER ASSEMBLY (LandCruiser RM000003B6H02GX.html)
OK


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

  1. Disconnect the H55 navigation receiver assembly connector.

  1. Disconnect the I6 parking assist ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H55-7 (TX3+) - I6-11 (TX+)
    		Always
    		Below 1 Ω
    H55-8 (TX3-) - I6-10 (TX-)
    		Always
    		Below 1 Ω
    H55-7 (TX3+) - Body ground
    		Always
    		10 kΩ or higher
    H55-8 (TX3-) - 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 with a new or normally functioning one.

    1. for LHD: LandCruiser RM00000466X026X.html
    2. for RHD: LandCruiser RM00000470500OX.html

NEXT


7.CLEAR DTC

  1. Clear the DTCs (LandCruiser RM0000011BU0W7X.html).


NEXT


8.CHECK DTC

  1. Recheck for DTCs and check if the same DTC is output again (LandCruiser RM0000011BU0W7X.html).



NG
REPLACE NAVIGATION RECEIVER ASSEMBLY (LandCruiser RM000003B6H02GX.html)
OK

END (PARKING ASSIST ECU IS DEFECTIVE)