Hyundai Sonata LF Quiz
Restraints

Occupant Classification System (OCS) Sensor Repair Procedures

In this manual: Restraints
General Information — 9Engine Mechanical System — 90Engine Electrical System — 58Emission Control System — 24Engine Control System/Fuel System — 114Drive Shaft and Axle — 15Suspension System — 35Steering — 19Restraints — 50Brake System — 54Body (Interior and Exterior) — 213Body Electrical System — 241Heating, Ventilation, and Air Conditioning — 56DCT (Dual Clutch Transmission) System — 52
18steps
~108min
4/5difficulty
Done 0 of 18

Removal

OCS ECU
  1. Disconnect the negative battery cable and wait at least three minutes before starting work.
  2. Remove the front passenger seat assembly. (Refer to Body - "Front Seat Assembly")
  3. Disconnect the OCS ECU connector (A).
  4. Remove the OCS mounting bolts (B).
  5. Disconnect the negative battery cable and wait at least three minutes before starting work.
  6. Remove the front passenger seat assembly. (Refer to Body - "Front Seat Assembly")
  7. Disconnect the OCS ECU connector.
  8. Remove the front seat cushion assembly. (Refer to Body - "Front Seat Cushion Cover")
OCS Mat

Installation

OCS ECU
  1. Install the OCS ECU on the front seat assembly rail.
  2. Connect the OCS ECU connector.
  3. Install the front passenger seat assembly. (Refer to Body - "Front Seat Assembly")
  4. Connect the negative battery cable.
  5. After installing the OCS, check that the system operates correctly.
    • Turn the ignition ON. The SRS indicator should illuminate for approximately six seconds and then turn off.
    • The warning lamp illuminates for 4 seconds and turns off within 3 seconds. After 7 seconds it should remain off if the OCS does not require suppression and the passenger airbag is enabled.
    • Be sure to perform the OCS reset using GDS after replacing the seat cushion with OCS.

OCS Rest Procedure

You must perform the OCS reset procedure after servicing or replacing almost any part of the passenger seat. (Complete front seat assembly is not included)
  1. Ignition OFF, connect GDS.
  2. Turn the ignition ON and the engine OFF, select the airbag system and the "Body Sensor Reset" mode.
  3. GDS will display two steps of the OCS reset function.
    1. Erase the OCS diagnostic trouble codes.
    2. OCS initialization.
      This step must be performed when the front passenger seat is unoccupied.
  4. Select the product configuration.
    1. C1: Without heater
    2. C2: Heater
    Before starting the OCS Rest process, check the seat configuration on the actual vehicle. If you see the center console, you can find different buttons for each seat configuration type. (Refer to the figure below)
    1. Manual Type
    2. Dual Type
  5. The OCS initialization procedure will be performed. C1: No heater type reset
    C2: Heater type reset (including ventilated seat)
    Erase the SRSCM diagnostic trouble codes after completing the OCS reset.
    Malfunction Code Code Name Description
    B1763 ECU Defect
    1. Reset (calibration setting) not completed
    2. ECU damaged by physical load
    B1764 MAT Defect
    1. MAT and ECU are not connected.
    2. Mat is damaged due to physical stress.
    B1767 Deactivation Algorithm
    1. Humidity is too high.
    B1111 IGN voltage high
    1. IGN voltage is high.
    B1112 IGN voltage low
    1. IGN voltage is low.
    B1603 CAN bus off
    1. CAN bus is not operating.
    B1697 ACU communication error
    1. CAN bus is not operating.
    2. ACU is not operating.

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