Dtc B15F9 Uart Communication Malfunction(For A/C)

Audio Visual Telematics. Land Cruiser. Urj200, 202 Grj200 Vdj200
Navigation Multi Info Display. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK DTC

CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MULTI-DISPLAY ASSEMBLY)

REPLACE MULTI-DISPLAY ASSEMBLY

CLEAR DTC

CHECK DTC

DTC B15F9 UART Communication Malfunction(for A/C)


DESCRIPTION

The multi-media module receiver assembly and multi-display assembly are connected by the UART communication line.
When a UART communication error occurs between the multi-media module receiver assembly and multi-display assembly, these DTCs will be stored.

DTC Code
DTC Detection Condition
Trouble Area
B15F9
Multi-display for air conditioning switch operation signal input malfunction.
  1. Harness or connector
  2. Multi-display assembly
  3. Multi-media module receiver assembly

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Navigation Multi Info Display.Navigation System. Dtc B15F9 Uart Communication Malfunction(For A/C)


INSPECTION PROCEDURE

1.CLEAR DTC

  1. Clear the DTCs (Click here).


NEXT


2.CHECK DTC

  1. Recheck for DTCs and check if the same DTC is output again (Click here).

    OK:
    No DTCs are output.


NG
Go to step 3
OK

USE SIMULATION METHOD TO CHECK (Click here)

3.CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MULTI-DISPLAY ASSEMBLY)

  1. Disconnect the F77 multi-media module receiver assembly connector.

  1. Disconnect the F79 multi-display assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F77-36 (UPSW) - F79-3 (UPSW)
    		Always
    		Below 1 Ω
    F77-35 (UIND) - F79-4 (UIND)
    		Always
    		Below 1 Ω
    F77-36 (UPSW) - Body ground
    		Always
    		10 kΩ or higher
    F77-35 (UIND) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.REPLACE MULTI-DISPLAY ASSEMBLY

  1. Replace the multi-display assembly with a new or normally functioning one (Click here).


NEXT


5.CLEAR DTC

  1. Clear the DTCs (Click here).


NEXT


6.CHECK DTC

  1. Recheck for DTCs and check if the same DTC is output again (Click here).

    OK:
    No DTCs are output.


NG
REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY (Click here)
OK

END (MULTI-DISPLAY ASSEMBLY IS DEFECTIVE)