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 position control ECU and switch.

  • Power source circuit of position control ECU and switch

  • Position control ECU and switch CAN branch wire or connector

  • Position control ECU and switch

WIRING DIAGRAM

A01X29CE01
*a No. 9 Junction Connector
*b FR P/SEAT RH
*c Position Control ECU and Switch
*d from Battery

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 (POSITION CONTROL ECU AND SWITCH CAN BRANCH WIRE)


    1. A01X8TSE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Position Control ECU and Switch)

      Disconnect the c27 position control ECU and switch connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      c27-5 (MPX1) - c27-1 (MPX2) Ignition switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE POSITION CONTROL ECU AND SWITCH CAN BRANCH WIRE OR CONNECTOR (MPX1, MPX2)

    OK

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


    1. A01X2T2E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Position Control ECU and Switch)

      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 c26 position control ECU and switch connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      c26-5 (+B) - 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
      c26-1 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE POSITION CONTROL ECU AND SWITCH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR