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CAN COMMUNICATION SYSTEM, Diagnostic DTC:U0199

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

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U0199 Lost Communication with "Door Control Module A"

  • No communication from the outer mirror control ECU assembly (for front passenger side) continues. (for LHD)

  • No communication from the outer mirror control ECU assembly (for driver side) continues. (for RHD)

  • Outer mirror control ECU assembly (for front passenger side) branch line or connector (for LHD)

  • Power source circuit of outer mirror control ECU assembly (for front passenger side) (for LHD)

  • Outer mirror control ECU assembly (for front passenger side) ground circuit (for LHD)

  • Outer mirror control ECU assembly (for front passenger side) (for LHD)

  • Outer mirror control ECU assembly (for driver side) branch line or connector (for RHD)

  • Power source circuit of outer mirror control ECU assembly (for driver side) (for RHD)

  • Outer mirror control ECU assembly (for driver side) ground circuit (for RHD)

  • Outer mirror control ECU assembly (for driver side) (for RHD)
Tip:

The main body ECU (multiplex network body ECU) stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 1.
Tip:

This diagnostic procedure is for when DTC U0199 is output by the main body ECU (multiplex network body ECU) (GTS display: Main Body).

Figure 2. for RHD: B0066Q1E95
Figure 1. for LHD:
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

Note:

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

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  • Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the engine switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.

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

Tip:

  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.

  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

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PROCEDURE


  1. Click here

    RECONFIRM DTC OUTPUT


    1. Reconfirm DTCs.


      1. Body Electrical > Main Body > Trouble Codes


      Tip:

      If DTC U1002 is output from Main Body of the main body ECU (multiplex network body ECU), this indicates a sub bus 1 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 1.

      Result
      Result Proceed to
      DTC U1002 is not output from the main body ECU (multiplex network body ECU) (GTS display: Main Body) A
      DTC U1002 is output from the main body ECU (multiplex network body ECU) (GTS display: Main Body) B

  2. Click here

    CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      for LHD A
      for RHD B

  3. Click here

    CHECK FOR OPEN IN SUB BUS 1 LINES (OUTER MIRROR CONTROL ECU ASSEMBLY (FOR FRONT PASSENGER SIDE) BRANCH LINE)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. B0067PWC44
      *a

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (for Front Passenger Side))

      Disconnect the R12 outer mirror control ECU assembly (for front passenger side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R12-9 (CANP) - R12-8 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      Result
      Result
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY (FOR FRONT PASSENGER SIDE))

  4. Click here

    CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. B0067PWC45
      *a

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (for Front Passenger Side))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R12-7 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

    2. Reconnect the cable to the negative (-) battery terminal.

    3. B0067PWC46
      *a

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (for Front Passenger Side))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R12-5 (SIG) - Body ground Engine switch on (IG) 11 to 14 V
      R12-6 (CPUB) - Body ground Always 11 to 14 V
      R12-14 (BDR) - Body ground Always 11 to 14 V
      Result
      Result
      OK
      NG

    • OK

      REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FOR FRONT PASSENGER SIDE)Click here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

  5. Click here

    CHECK FOR OPEN IN SUB BUS 1 LINES (OUTER MIRROR CONTROL ECU ASSEMBLY (FOR DRIVER SIDE) BRANCH LINE)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. B0067PWC44
      *a

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (for Driver Side))

      Disconnect the R12 outer mirror control ECU assembly (for driver side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R12-9 (CANP) - R12-8 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      Result
      Result
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY (FOR DRIVER SIDE))

  6. Click here

    CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. B0067PWC45
      *a

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (for Driver Side))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R12-7 (GND) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

    2. Reconnect the cable to the negative (-) battery terminal.

    3. B0067PWC46
      *a

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (for Driver Side))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R12-5 (SIG) - Body ground Engine switch on (IG) 11 to 14 V
      R12-6 (CPUB) - Body ground Always 11 to 14 V
      R12-14 (BDR) - Body ground Always 11 to 14 V
      Result
      Result
      OK
      NG

    • OK

      REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FOR DRIVER SIDE)Click here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)