CAN COMMUNICATION SYSTEM(for LHD), Diagnostic DTC:U0125, U0124

DTC Code DTC Name
U0125 Lost Communication with Yaw Rate Sensor Module
U0124 Lost Communication with Lateral Acceleration Sensor Module

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U0125 There is no communication from the yaw rate sensor assembly.

  • Power source circuit of yaw rate sensor assembly

  • Yaw rate sensor assembly CAN branch wire or connector

  • Yaw rate sensor assembly
U0124 There is no communication from the yaw rate sensor assembly (lateral acceleration sensor).

  • Power source circuit of yaw rate sensor assembly

  • Yaw rate sensor assembly CAN branch wire or connector

  • Yaw rate sensor assembly

WIRING DIAGRAM

A01X0P8E01
*a No. 5 Junction Connector
*b ECU-IG No. 2
*c from IG1 NO. 3 Relay
*d Yaw Rate Sensor

CAUTION / NOTICE / HINT

Note

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

Tech Tips

Operating the ignition 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 ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.


    NEXT

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.

      CAUTION:

      For vehicles with an SRS system:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) 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 (YAW RATE SENSOR ASSEMBLY CAN BRANCH WIRE)


    1. A01X8EGE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor Assembly)

      Disconnect the E50 yaw rate sensor assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E50-3 (CANH) - E50-2 (CANL) Ignition switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE YAW RATE SENSOR ASSEMBLY CAN BRANCH WIRE OR CONNECTOR (CANH, CANL)

    OK

  4. CHECK HARNESS AND CONNECTOR (YAW RATE SENSOR ASSEMBLY - BATTERY AND BODY GROUND)


    1. A01XBKGE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor Assembly)

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

      Note

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E50-4 (IG) - Body ground Ignition switch ON 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E50-1 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE YAW RATE SENSOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR