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

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

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

Tip:

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

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PROCEDURE


  1. Click here

    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).


  2. Click here

    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).


  3. Click here

    CHECK FOR OPEN IN CAN BUS WIRE (YAW RATE SENSOR ASSEMBLY CAN BRANCH WIRE)


    1. A01561CE07

      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
      Table 1. Text in Illustration
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor Assembly)

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


    1. A01561CE08

      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
      Table 2. Text in Illustration
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor Assembly)

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    REPLACE YAW RATE SENSOR ASSEMBLYClick here

  6. Click here

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

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    REPAIR OR REPLACE HARNESS OR CONNECTOR