Test I

PINPOINT TEST I: LFC 16/DTC B2290 - OCCUPANT CLASSIFICATION SYSTEM (OCS) FAULT

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Test I16-I18:

Test I18:

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Test I21:

Normal Operation
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 (ECU)) 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 (ECU)) must be installed as an assembly.

Fault Conditions
The OCS system reports the following fault conditions to the RCM:
- low resistance
- circuit open
- circuit short to battery
- circuit short to ground
- a faulted pressure sensor
- a faulted ECU mounting condition

Possible Causes
An occupant classification sensor (OCS) circuit fault can be caused by:
- wiring, terminals, or connectors.
- a faulty OCS system component.
- a faulted RCM.