CAN COMMUNICATION SYSTEM(for RHD), Diagnostic DTC:U1111

DTC Code DTC Name
U1111 Lost Communication with Body No. 5 Module

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U1111 There is no communication from the front multiplex network light ECU (front controller).

  • Power source or inside of front multiplex network light ECU (front controller)

  • Front multiplex network light ECU (front controller)

WIRING DIAGRAM

A000Y4YE02

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - BATTERY AND BODY GROUND)


    1. A00102VE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Front Multiplex Network Light ECU [Front Controller])

      Disconnect the front multiplex network light ECU (front controller) connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A50-1 (FMB3) - Body ground Always 11 to 14 V
      A52-1 (BATB) - Body ground Always 11 to 14 V
      A52-5 (ALTB) - Body ground Always 11 to 14 V
      A50-5 (FMIG) - Body ground Power switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A50-2 (E) - Body ground Always Below 1 Ω

    OK

    REPLACE FRONT MULTIPLEX NETWORK LIGHT ECU (FRONT CONTROLLER)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR