Weight Classification System (WCS) Repair Procedures

Removal

1. 1
   Disconnect the negative battery cable and wait at least three minutes before starting work.
2. 2
   Remove the front passenger seat assembly. (Refer to Body Group – Seat)
3. 3
   Remove the OCS assembly. (Refer to Body Group – Seat)

   There are several cases for DTCs. Please check the status below. A B1344 WCS ECU Malfunction B B1319 Weight Check Required C B1644 May Time Out ACU D B1323 Sensor Malfunction Case A. Replace only the ECU. After replacement, perform WCS reset and DTC clearing. Case B. Perform WCS reset and accuracy check. If the accuracy check result is accepted and the DTC is historical, the WCS can be reused. Case C or Case D. Check the vehicle wiring, connectors, and operating conditions. If there is no DTC after WCS reset and DTC clearing, the WCS can be reused.

Installation

1. 1
   Install the WCS on the front passenger seat assembly. (Refer to Body group - "Seat")
2. 2
   Install the front passenger seat assembly. (Refer to Body group - "Seat")
3. 3
   Connect the negative battery cable.
4. 4
   After installing the WCS, perform a WCS reset and accuracy check using the GDS.

   1. Adjust the seat position according to the table below.

      Item	NOTE
      Seat position	Rearmost position
      Seatback angle	Normal (upright)
      Headrest position	Lowest position
      Lifter position	Lowest position

      
      Make sure the seat belt is not fastened and the belt tension is normal.
   2. Connect the GDS connector to the data link connector located under the cover panel.
   3. Turn the ignition ON and turn on the GDS.
   4. Perform a WCS reset using the GDS. [System Selection Screen] Vehicle Selection_Airbag_Weight Classification System_WCS RESET_ENTER ("Completed" is then displayed)
   5. Perform the accuracy check using the GDS. [System Selection Screen] Vehicle Selection_Airbag_Weight Classification System_WCS RESET_ESC
   6. Make sure the measured weight is within the specified value. Then press "ESC".

      Specification: -6 kg to 6 kg (-13.23 lb to 13.23 lb)

   7. Place a 37 kg (81.57 lb) weight on the front passenger seat.
   8. Confirm that the accuracy check result is within the specified value.

      Specification: 31 kg to 43 kg (68.34 lb to 94.79 lb)

5. 5
   After installing the WCS, check that the system operates correctly:

   • Turn the ignition ON. The SRS indicator should illuminate for approximately six seconds and then turn off.
   • The indicator lamp will illuminate for 4 seconds and turn off within 3 seconds. After 7 seconds it should remain off if the WCS does not require suppression and the passenger airbag is enabled.