CAN COMMUNICATION SYSTEM (for RHD), Diagnostic DTC:U0130

DTC Code DTC Name
U0130 Lost Communication with Steering Effort Control Module

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U0130 There is no communication from the front steering control ECU
  • Power source or inside of front steering control ECU

  • Front steering control ECU CAN branch wire or connector

  • Front steering control ECU CAN main wire or connector

  • Front steering control ECU


WIRING DIAGRAM

A01FQZ6E06

INSPECTION PROCEDURE

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 Click here.

  • 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 auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the auxiliary battery terminal notice before proceeding with work Click here.

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

  • 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 60 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 switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

  • 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 Gateway of the network gateway ECU, this indicates a sub bus 19 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 19.

      Result
      Result Proceed to
      DTC U1002 is not output from network gateway ECU. A
      DTC U1002 is output from network gateway ECU. B

    B
    A
  2. CHECK FOR OPEN IN CAN BUS WIRE (FRONT STEERING CONTROL ECU CAN MAIN AND BRANCH WIRE)


    1. A01FSYXE04
      Text in Illustration
      *A Sub Bus 19
      *B Local Bus
      *a

      Front view of wire harness connector

      (to Front Steering Control ECU)

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

    2. Disconnect the front steering control ECU connector.

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

      Standard Resistance
      Sub Bus 19
      Tester Connection Condition Specified Condition
      N104-2 (CNH2) - N104-8 (CNL2) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      Local Bus
      Tester Connection Condition Specified Condition
      N104-10 (CAN+) - N104-11 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result Proceed to
      OK A
      NG (Sub Bus 19) B
      NG (Local Bus) C

    B
    C
    A
  3. CHECK HARNESS AND CONNECTOR (FRONT STEERING CONTROL ECU - BATTERY AND BODY GROUND)


    1. A01FQV3E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Front Steering Control ECU)

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

      Note

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

    2. Disconnect the front steering control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A31-2 (PIG) - Body ground Always 11 to 14 V
      N104-7 (+BI) - Body ground Always 11 to 14 V
      N104-4 (IG) - Body ground Power switch on (IG) 11 to 14 V
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A31-1 (PGND) - Body ground Always Below 1 Ω
      N104-13 (PGD2) - Body ground Always Below 1 Ω

    NG
    OK