Test E: DTC B2290 - Occupant Classification System (OCS) Fault
PINPOINT TEST E: DTC B2290 - OCCUPANT CLASSIFICATION SYSTEM (OCS) FAULTE1-E3:
E3-E4:
E5-E6:
E7-E9:
E9-E10:
E10-E12:
E12-E13:
E14:
NOTE: DTC B2290 reported by the RCM is informational only and indicates the presence of a fault in the occupant classification sensor (OCS) module. Refer to the Supplemental Restraints System (SRS) Diagnostic Trouble Code (DTC) Table when DTC B2290 is reported by the RCM for diagnostic instructions. The pinpoint test must only be used to diagnose DTC B2290 when reported by the OCS module. Diagnostic Trouble Code Tests and Associated Procedures
Normal Operation
The occupant classification sensor (OCS) is used to classify the front passenger seat occupant in the event of a deployable impact.
The OCS module monitors the pressure sensor and circuity for faults. If the OCS module detects a fault with the sensor or circuitry, it will store diagnostic trouble code (DTC) B2290 in memory and send a message to the restraints control module (RCM) which illuminates the air bag 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 electronic control unit) must be installed as an assembly.
Fault Conditions
The OCS module monitors for the following fault conditions:
- Faulted circuit
- Pressure sensing fault
- Faulted module mounting condition
- Communication failure
Possible Causes
An occupant classification sensor (OCS) fault can be caused by:
- damaged wiring, terminals or connectors.
- a faulty OCS system component.