CAN COMMUNICATION SYSTEM(w/o Central Gateway ECU), Diagnostic DTC:U0230

DTC Code DTC Name
U0230 Lost Communication with Rear Gate Module

DESCRIPTION

DTC No. DTC Detection Condition Trouble Area
U0230 No communication from the luggage closer motor assembly continues.
  • Luggage closer motor assembly branch line or connector

  • Power source circuit of luggage closer motor assembly

  • Luggage closer motor assembly ground circuit

  • Luggage closer motor assembly

Tech Tips

This diagnosis procedure is for when DTC U0230 is output by the main body ECU (GTS display: Main Body).

WIRING DIAGRAM

A0007J6E15
A000817E11

CAUTION / NOTICE / HINT

Note


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

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

  • 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 Click here.

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

  • DTC check procedure: Turn the power switch on (IG) and wait at least 20 seconds.

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

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 DTC U1002 is output from Main Body of the main 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
      U1002 is not output from main body ECU (GTS display: Main Body) A
      U1002 is output from main body ECU (GTS display: Main Body) B

    B
    A
  2. CHECK FOR OPEN IN SUB BUS 1 LINES (LUGGAGE CLOSER MOTOR ASSEMBLY BRANCH LINE)


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

    2. A0004P7E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Luggage Closer Motor Assembly)

      Disconnect the U16 luggage closer motor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U16-6 (CANP) - U16-5 (CANN) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

    NG
    OK
  3. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. A00094IE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Luggage Closer Motor Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U16-11 (GND) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω

    NG
    OK
  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)


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

    2. A000995E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Luggage Closer Motor Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      U16-8 (IG) - Body ground Power switch on (IG) 11 to 14 V
      U16-10 (ECUB) - Body ground Power switch off 11 to 14 V

    OK
    NG