Test I: DTC B2290 - Occupant Classification Sensor (OCS) System Fault

PINPOINT TEST I: DTC B2290 - OCCUPANT CLASSIFICATION SENSOR (OCS) SYSTEM FAULT

I1-I2:

I3-I5:

I5-I6:

I7-I8:

I9-I12:

I12-I13:

I14-I15:

I16-I18:

I18-I19:

I20:

I21-I22:

Lamp Fault Codes (LFC)







The lamp fault codes (LFCs) indicate the specific fault PIDs associated with diagnostic trouble code (DTC) B2290.

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 OCS circuits for faults. If the RCM detects one of the following faults on any of the OCS circuits, it will store DTC B2290 in memory and, depending on the fault, flash a lamp fault code on the air bag indicator. The secondary air bag warning chime will also be activated.

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 OCS circuit fault can be caused by:
- wiring, terminals or connectors.
- a faulty OCS system.
- a faulted RCM.