Dtc B15F9 Uart Communication Malfunction(For A/C)

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - AUDIO / VIDEO

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 CodeDTC Detection ConditionTrouble Area
B15F9 Multi-display for air conditioning switch operation signal input malfunction.
Multi-display assembly
Multi-media module receiver assembly
Harness or connector

WIRING DIAGRAM

Dtc B15F9 Uart Communication Malfunction(For A/C). AUDIO / VIDEO. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

1.CLEAR DTC

Clear the DTCs ().

NEXT
2.CHECK DTC

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

  • OK:
  • No DTCs are output.
NG
Go to step 3
OK
USE SIMULATION METHOD TO CHECK ()
3.CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MULTI-DISPLAY ASSEMBLY)

Disconnect the F77 multi-media module receiver assembly connector.

Disconnect the F79 multi-display assembly connector.

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

  • Standard Resistance:
  • Tester ConnectionConditionSpecified Condition
    F77-36 (UPSW) - F79-3 (UPSW)AlwaysBelow 1 Ω
    F77-35 (UIND) - F79-4 (UIND)AlwaysBelow 1 Ω
    F77-36 (UPSW) - Body groundAlways10 kΩ or higher
    F77-35 (UIND) - Body groundAlways10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
4.REPLACE MULTI-DISPLAY ASSEMBLY

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

NEXT
5.CLEAR DTC

Clear the DTCs ().

NEXT
6.CHECK DTC

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

  • OK:
  • No DTCs are output.
NG
REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY ()
OK
END (MULTI-DISPLAY ASSEMBLY IS DEFECTIVE)