Test I: LFC 16/DTC B2290 - Occupant Classification System (OCS) Fault

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

I1:

I1-I5:

I5-I6:

I7-I8:

I9-I12:

I12-I13:

I14-I15:

I16-I18:

I18-I20:

I20 Continued:

I21-I22:

NOTE: LFC 16 is shared between DTC B2290 and DTC Bdd.

Normal Operation
The occupant classification system (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 OCS system. If the RCM detects 1 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 1 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 OCS fault can be caused by:
- damaged wiring, terminals or connectors.
- a faulty OCS system component.
- a faulted RCM.