Normal Operation

The Occupant Classification System Module (OCSM) monitors the 4 Occupant Classification Sensor (OCS) weight sensors bolts and circuity for faults. If the OCSM  detects an obstruction, an upward force on the passenger seat for 60 seconds, it will store DTC B229B in memory and send a message to the Restraints Control Module (RCM). The RCM  will store DTC B2290 in memory and send a message to the Instrument Cluster (IC) module to illuminate the air bag warning indicator.

• DTC B229B (Occupant Classification System Obstruction) - If the OCSM  detects a negative force on one or more OCS weight sensor bolt(s) (weight sensors), it will set this DTC.

  This pinpoint test is intended to diagnose the following: 

• Foreign object placed under or contacting the passenger seat