CAN COMMUNICATION SYSTEM (for LHD), 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 steering control ECU.

  • Power source or inside of steering control ECU

  • Steering control ECU CAN branch wire or connector

  • Steering control ECU

WIRING DIAGRAM

A01H299E02

INSPECTION PROCEDURE

Note

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

Tech Tips

Operating the power 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 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.


    NEXT

  2. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL


    1. Disconnect the cable from the negative (-) auxiliary 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 (-) auxiliary 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 (STEERING CONTROL ECU CAN BRANCH WIRE)


    1. A01H08DE01
      Text in Illustration
      *A Steering Bus
      *B Braking and Driving Bus
      *a

      Front view of wire harness connector

      (to Steering Control ECU)

      Disconnect the steering control ECU connectors.

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

      Standard Resistance
      Steering Bus
      Tester Connection Switch Condition Specified Condition
      A41-9 (CANH) - A41-20 (CANL) Power switch off 54 to 69 Ω
      Braking and Driving Bus
      Tester Connection Switch Condition Specified Condition
      A42-4 (CAN+) - A42-9 (CAN-) Power switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE STEERING CONTROL ECU CAN BRANCH WIRE OR CONNECTOR (CANH, CANL, CAN+, CAN-)

    OK

  4. CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU - BATTERY AND BODY GROUND)


    1. A01GWW0E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Steering Control ECU)

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

      Note

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

    2. Disconnect the steering control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A42-10 (+BI) - Body ground Always 11 to 14 V
      A42-8 (PIG) - Body ground Always 11 to 14 V
      A42-3 (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
      A42-7 (PGND) - Body ground Always Below 1 Ω
      A43-8 (PGD2) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE STEERING CONTROL ECU Click here