Occupant Classification Sensor Control Module (OCSCM) - NAS Vehicles Only

CAUTION: The Occupant Classification Sensor Control Module (OCSCM), hose and pressure pad form a sealed assembly and must not be disassembled. The assembly can only be replaced as part of the occupant classification system service kit. The service kit includes the seat cushion, because the assembly is specifically calibrated to the cushion, and each cushion has a unique calibration.

The Occupant Classification Sensor Control Module (OCSCM) supplies a reference voltage to the seatbelt tension sensor and from the return signal, measures the load acting on the passenger seatbelt buckle anchor point. The measurement is used to produce a correction factor for the load acting on the pressure pad. The tightness of the seatbelt affects the load acting on the pressure pad, so without the correction factor the OCSCM cannot derive an accurate occupancy status.

The OCSCM translates the load readings into a seat occupancy status and transmits the result to the RCM, on the HS CAN powertrain systems bus.

The OCSCM incorporates two load limits for the seat cushion:

When the load is less than the lower limit, the seat is classified as unoccupied.
When the upper limit is exceeded, the seat is classified as occupied by an adult.
When the load exceeds the lower limit, but is less than the upper limit, the seat is classified as occupied by a child.

NOTE: If a repair has been carried out, with the seat installed and empty, the OCSCM must be reset using Jaguar approved diagnostic equipment.

The following pre-conditions are required to run the resetting routine correctly:

Ignition is switched on.
No collision event received from the RCM during the current ignition cycle.
No faults present in the current ignition cycle.
The passenger seat is bolted in its original installation position.
The OCSCM has gone through the seat assembly plant calibration.
The OCSCM has settled for 10 seconds.
Temperature is between 10 °C (50 °F) and 40 °C (104 °F).

NOTE: If the passenger seat connector has been disconnected during a repair procedure, can cause a "Missing calibration" DTC. Run the "Learn seat occupant classification zero position" routine to reset the OCSCM using Jaguar approved diagnostic equipment.

The following pre-conditions are required to run the "Learn seat occupant classification zero position" routine correctly:

The passenger seat is empty when the ignition is switched on.
The passenger seatbelt is not buckled.
The engine is running.
Wait 10 seconds to ensure that no pressure fluctuations occur.

Clear DTCs and retest the system after the "Learn seat occupant classification zero position" routine has been carried out. If the routine fails for any reason, request the routine results using the Jaguar approved diagnostic equipment.