CAN COMMUNICATION SYSTEM (for RHD), Diagnostic DTC:U0209

DTC Code DTC Name
U0209 Lost Communication with "Seat Control Module B"

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U0209 There is no communication from the front power seat switch LH.

  • Power source or inside of front power seat switch LH

  • Front power seat switch LH CAN branch wire or connector

  • Front power seat switch LH

WIRING DIAGRAM

A01GIMJE12

INSPECTION PROCEDURE

Note

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

Tech Tips

Operating the engine 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 engine 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:

      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 (FRONT POWER SEAT SWITCH LH CAN BRANCH WIRE)


    1. A01GKH3E19
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Front Power Seat Switch LH)

      Disconnect the front power seat switch LH connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      e72-25 (CANP) - e72-24 (CANN) Engine switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE FRONT POWER SEAT SWITCH LH CAN BRANCH WIRE OR CONNECTOR (CANP, CANN)

    OK

  4. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - BATTERY AND BODY GROUND)


    1. A01GK7BE04
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Front Power Seat Switch LH)

      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. Disconnect the front power seat switch LH connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      e71-7 (+B) - Body ground Always 11 to 14 V
      e72-4 (SYSB) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      e71-6 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH LH Click here