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

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

I1-I2:

I3-I5:

I5-I6:

I7-I8:

I9-I12:

I12-I13:

I14-I15:

I16-I18:

I18-I20:

I20-I23:

I23-I24:

I25-I26:

I27-I29:

I29 Continued:

I30-I31:

NOTE: LFC 16 is shared between DTC B2290 and DTC B2909.

Normal Operation
The occupant classification sensor (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 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, electronic control unit [ECU] and seat wiring harness) 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, ECU and seat wiring harness) 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.