CAN COMMUNICATION SYSTEM(for LHD), Diagnostic DTC:U0201

DTC Code DTC Name
U0201 Lost Communication with "Door Control Module C"

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U0201 There is no communication from the rear multiplex network door ECU RH.

  • Power source or inside of rear multiplex network door ECU RH

  • Rear multiplex network door ECU RH CAN branch wire or connector

  • Rear multiplex network door ECU RH

WIRING DIAGRAM

A001EQJE03

CAUTION / NOTICE / HINT

Note

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

Tech Tips

Operating the engine switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE


  1. PRECAUTION

    Note

    After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.


    NEXT

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.


    NEXT

  3. CHECK FOR OPEN IN CAN BUS WIRE (REAR MULTIPLEX NETWORK DOOR ECU RH CAN BRANCH WIRE)


    1. A001DV0E03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Rear Multiplex Network Door ECU RH)

      Disconnect the rear multiplex network door ECU RH connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      O3-9 (CANP) - O3-10 (CANN) Engine switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE REAR MULTIPLEX NETWORK DOOR ECU RH CAN BRANCH WIRE OR CONNECTOR (CANP, CANN)

    OK

  4. CHECK HARNESS AND CONNECTOR (REAR MULTIPLEX NETWORK DOOR ECU RH - BATTERY AND BODY GROUND)


    1. A001BR8E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Rear Multiplex Network Door ECU RH)

      Connect the cable to the negative (-) battery terminal.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O3-6 (BDR) - Body ground Always 11 to 14 V
      O3-11 (CPUB) - Body ground Always 11 to 14 V
      O3-3 (SIG) - 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
      O3-1 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE REAR MULTIPLEX NETWORK DOOR ECU RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR