Occupant Detection Sensor Or Occupant Classification Module

ODS 

All non-North American vehicles are equipped with an ODS. The ODS is located on the top of the seat cushion foam of the passenger side front seat. The ODS is a resistive pressure switch. The ODS closes when a pre-programmed load is placed on the seat. The ODS is used to trigger a seat belt reminder if a passenger is detected on the seat. The ODS does not affect the level of airbag deployment.

The ODS acts as a simple switch to detect loads placed upon the passenger side front seat cushion. The sensor circuits are connected to and monitored by the ORC whenever the status of the ignition is On. The ORC uses an algorithm logic in monitoring the changing states of the sensor input to determine whether the seat cushion load is static or dynamic.

The ORC microcontroller continuously monitors all of the SRS electrical circuits to determine the system status and readiness. If the ORC detects a monitored system fault, it sets a DTC. However, because the ODS input is only used for control of the passenger belt alert feature, which has no effect on SRS component features or functions, the airbag indicator is NOT  illuminated in response to a detected ODS circuit fault.

The ODS receives source current and a clean ground through dedicated sensor plus and minus circuits from the ORC. The ORC then sends the appropriate sensor status information over the CAN data bus to the IPC, which uses this information as an additional logic input used for control of the seat belt indicator and the passenger belt alert feature.

The hardwired circuits between the ODS and the ORC may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the ODS or the electronic controls and communication between other modules and devices that provide some features of the passenger belt alert feature. The most reliable, efficient and accurate means to diagnose the ODS or the electronic controls and communication related to the passenger belt alert feature operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

The ODS cannot be adjusted or repaired, and must be replaced if damaged or ineffective.

OCM 

All North American vehicles are equipped with an OCM. For information about the OCM. Refer to MODULE, OCCUPANT CLASSIFICATION (OCM), DESCRIPTION AND OPERATION .