Pinpoint Test 5: DTC B2290 - Occupant Classification System (OCS) Fault
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PINPOINT TEST 5: DTC B2290 - OCCUPANT CLASSIFICATION SYSTEM (OCS) FAULT
NOTE:DTC B2290 reported by the RCM is informational only and indicates the presence of a fault in the occupant classification sensor module (OCSM). Refer to the Supplemental Restraints System (SRS) DTC Chart when DTC B2290 is reported by the RCM for diagnostic instructions. The following pinpoint test must only be used to diagnose DTC B2290 when reported by the OCSM.Normal OperationThe OCSM system is used to classify the front passenger seat occupant in the event of a deployable impact. See Service and Repair.
The OCSM monitors the pressure sensor and circuity for faults. If the OCSM detects a fault with the sensor or circuitry, it will store DTC B2290 in memory and send a message to the instrument cluster module to illuminate the air bag warning indicator.
The OCS system components (seat cushion foam pad, bladder with pressure sensor and electronic control unit) are calibrated to each other and are serviced as an assembly. The OCS system components are not to be installed separately. If a new OCS system, OCS system component or seat cushion foam pad are needed, a new OCS system service kit (seat wiring harness, seat cushion frame, seat cushion foam pad, bladder with pressure sensor and OCSM) must be installed as an assembly.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- OCS system component
- Pressure sensing fault
- Module mounting condition
a = Fault PIDs that end in OD indicate an on-demand status and are associated with on-demand DTC B2290. Fault PIDs that end in CM indicate continuous memory status and are associated with continuous DTC B2290.
WARNING:Never probe the electrical connectors on air bag, safety canopy or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.Never probe the electrical connectors on safety belt buckle/retractor pretensioners or adaptive load limiting retractors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners or adaptive load limiting retractors, which increases the risk of serious personal injury or death.
CAUTION:Use the correct probe adapter(s) when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE:Supplemental restraint system (SRS) components should only be disconnected or reconnected when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.The supplemental restraint system (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.To identify between a production occupant classification sensor (OCS) system and an OCS system service kit, inspect the occupant classification system module (OCSM) electrical connector. An OCS service kit has the OCSM electrical connector glued to the module. It cannot, and should not, be disconnected or altered.
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