CAN COMMUNICATION SYSTEM, Diagnostic DTC:U0200

DTC Code DTC Name
U0200 Lost Communication with "Door Control Module B"

DESCRIPTION

DTC No. DTC Detection Condition Trouble Area
U0200 No communication from the outer mirror control ECU LH continues.

  • Outer mirror control ECU LH branch wire or connector

  • Power source circuit of outer mirror control ECU LH

  • Outer mirror control ECU LH

WIRING DIAGRAM

A01NHHEE01

INSPECTION PROCEDURE

Note


  • Turn the power switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.

  • Turn the power switch off before inspecting CAN bus wires for a ground short.

  • After the power switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.

  • Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the power switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.

Tech Tips


  • Operating the power switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE


  1. RECONFIRM DTC OUTPUT


    1. Reconfirm DTCs.

      Tech Tips

      If CAN MS bus DTC U1002 is output from the main body ECU (Intelligent tester display/Main Body), troubleshoot for U1002 and check for malfunctions in the CAN MS bus circuit.

      Result
      Result Proceed to
      U1002 is not output from main body ECU (Intelligent tester display/Main Body) A
      U1002 is output from main body ECU (Intelligent tester display/Main Body) B

    B

    GO TO CIRCUITS INDICATED BY OUTPUT DTCS Click here

    A

  2. CHECK CAN BUS WIRE FOR DISCONNECTION (OUTER MIRROR CONTROL ECU LH BRANCH WIRE)


    1. Turn the power switch off.

    2. A01NDWAE05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Outer Mirror Control ECU LH)

      Disconnect the outer mirror control ECU LH connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      J3-9 (CANP) - J3-8 (CANN) Power switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (OUTER MIRROR CONTROL ECU LH BRANCH WIRE)

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)


    1. A01NDWAE03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Outer Mirror Control ECU LH)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J3-6 (CPUB) - Body ground Always 11 to 14 V
      J3-5 (SIG) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    OK

  4. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. Turn the power switch off.

    2. A01NDWAE04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Outer Mirror Control ECU LH)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J3-7 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

    OK

    REPLACE OUTER MIRROR CONTROL ECU LH Click here