Test I

PINPOINT TEST I: DTC B2290 - OCCUPANT CLASSIFICATION SYSTEM FAULT

Lamp Fault Codes (LFC)







The lamp fault codes (LFCs) indicates the specific flagged faults associated with diagnostic trouble code (DTC) B2290.

Test I1:

Test I2-I3:

Test I3-I5:

Test I5-I6:

Test I7-I8:

Test I9-I10:

Test I11-I12:

Test I12-I13:

Test I14-I15:

Test I16-I18:

Test I18 Continued:

Test I18-I19:

Test I20:

Test I21:

Normal Operation
The occupant classification sensor (OCS) system is used to classify the front passenger seat occupant in the event of a deployable impact. 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

The restraints control module (RCM) checks the occupant classification system (OCS) circuits for faults. If the RCM detects one of the following faults on any of the OCS circuits, it will store diagnostic trouble code (DTC) B2290 in memory and, depending on the fault, flash a lamp fault code on the air bag indicator.

Fault Conditions
The RCM monitors for the following fault conditions:
- low resistance.
- circuit open.
- circuit short to battery.
- circuit short to ground.
- ECU mounting.

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