Hyundai Elantra AD Quiz
Restraints

Occupant Classification System (OCS) Repair Procedures

In this manual: Restraints
General Information — 9Engine Mechanical System — 84Engine Electrical System — 60Emission Control System — 24Engine Control System/Fuel System — 90Automatic Transmission — 92Drive Shaft and Axle — 20Suspension System — 31Steering — 20Restraints — 50Brake System — 63Body (Interior and Exterior) — 214Body Electrical System — 221Heating, Ventilation, and Air Conditioning — 71
17steps
~102min
4/5difficulty
Done 0 of 17

Removal

Occupant Classification System (OCS) Unit
  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 occupant classification system unit connector (A).
  4. Remove the occupant classification system unit (A) after loosening the mounting screws.
  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. Remove the front seat cushion assembly. (Refer to Body - "Front Seat Cushion Cover")
Occupant Classification System (OCS) Sensor

Installation

Occupant Classification System (OCS) Unit
  1. Install the occupant classification system unit on the front seat assembly guide.
  2. Connect the occupant classification system unit connector.
  3. Install the front passenger seat assembly. (Refer to Body - "Front Seat Assembly")
  4. Connect the negative battery cable.
  5. After installing the occupant classification system, 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 OCS unit.

OCS Reset 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 Reset process, verify 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 illustration below)
  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
    B176300 ECU Defect
    1. Reset (calibration setting) not completed
    2. ECU damaged by physical load
    B176400 MAT Defect
    1. MAT and ECU are not connected.
    2. MAT damaged by physical load.
    B17672F Deactivation Algorithm
    1. Humidity is too high.
    B111117 IGN voltage high
    1. IGN voltage is high.
    B111216 IGN voltage low
    1. IGN voltage is low.
    B160388 CAN bus off
    1. CAN bus is not operating.
    B169787 ACU communication error
    1. CAN bus is not operating.
    2. ACU is not operating.

Test yourself

A quick Hyundai Elantra AD quiz: every answer comes with an explanation and a link to the manual page.