CAN COMMUNICATION SYSTEM(for RHD), Diagnostic DTC:U0208

DTC Code DTC Name
U0208 Lost Communication with "Seat Control Module A"

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U0208 There is no communication from the front power seat switch RH.

  • Power source or inside of front power seat switch RH

  • Front power seat switch RH CAN branch wire or connector

  • Front power seat switch RH

WIRING DIAGRAM

A000YR5E32
*a No. 8 Junction Connector
*b from Auxiliary Battery
*c D P/SEAT
*d Front Power Seat Switch RH

CAUTION / NOTICE / HINT

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 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 (FRONT POWER SEAT SWITCH RH CAN BRANCH WIRE)


    1. A000VWWE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Front Power Seat Switch RH)

      Disconnect the front power seat switch RH connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      e79-25 (CANP) - e79-24 (CANN) Power switch off 54 to 69 Ω

    NG

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

    OK

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


    1. A000VUAE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Front Power Seat Switch RH)

      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 front power seat switch RH connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      e78-7 (+B) - Body ground Always 11 to 14 V
      e79-4 (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
      e78-6 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE FRONT POWER SEAT SWITCH RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR