CAN COMMUNICATION SYSTEM (for LHD), 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

A01GNUCE01

INSPECTION PROCEDURE

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. A01GIUAE01
      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 Engine 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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT MULTIPLEX NETWORK LIGHT ECU (FRONT CONTROLLER)