Test Q: LFC 16/DTC B2290 - Occupant Classification System (OCS) Fault
PINPOINT TEST Q: LFC 16/DTC B2290 - OCCUPANT CLASSIFICATION SYSTEM (OCS) FAULTQ1-Q3:
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Q9-Q12:
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Q16-Q18:
Q18 Continued:
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Q20 Continued:
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Normal Operation
NOTE: LFC 16 is shared between DTC B2290 and DTC B2909.
The OCS is used to classify the front passenger seat occupant in the event of a deployable impact.
The restraints control module (RCM) monitors for fault conditions reported by the occupant classification sensor (OCS) system. If the RCM detects one of the following faults reported by the OCS system, it will store diagnostic trouble code (DTC) B2290 in memory and flash lamp fault code (LFC) 16 (or higher priority code if one exists) on 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 cushion foam pad, bladder with pressure sensor, and electronic control unit) must be installed as an assembly.
Fault Conditions
The restraints control module (RCM) monitors communications from the OCS system, it will store diagnostic trouble code (DTC) B2290 in memory if there is a loss of communication with the OCS.
The OCS system reports the following fault conditions to the RCM:
- A faulted circuit
- A pressure sensing fault
- A faulted ECU mounting condition
- A communication failure
Possible Causes
An occupant classification sensor (OCS) fault can be caused by:
- damaged wiring, terminals or connectors.
- a faulty OCS system component.
- a faulted RCM.