CAN COMMUNICATION SYSTEM (for LHD), Diagnostic DTC:U0199

DTC Code DTC Name
U0199 Lost Communication with "Door Control Module A"

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U0199 There is no communication from the outer mirror control ECU assembly.

  • Power source circuit of outer mirror control ECU assembly

  • Outer mirror control ECU assembly CAN branch wire or connector

  • Outer mirror control ECU assembly

WIRING DIAGRAM

A01EQW5E14

INSPECTION PROCEDURE

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 (OUTER MIRROR CONTROL ECU ASSEMBLY CAN BRANCH WIRE)


    1. A01EO8GE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly)

      Disconnect the I18 outer mirror control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      I18-1 (CANH) - I18-21 (CANL) Engine switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY CAN BRANCH WIRE OR CONNECTOR (CANH, CANL)

    OK

  4. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY - BATTERY AND BODY GROUND)


    1. A01EPFIE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly)

      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. Disconnect the I17 outer mirror control ECU assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I17-3 (B) - Body ground Always 11 to 14 V
      I17-4 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I17-9 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY Click here