Test G

PINPOINT TEST G: LFC 16/DTC B2290 - OCCUPANT CLASSIFICATION SENSOR (OCS) CIRCUIT FAULT

Test G1-G3:

Test G3-G5:

Test G5-G6:

Test G7-G8:

Test G9-G12:

Test G12-G13:

Test G14-G15:

Test G16-G18:

Test G18 Continued:

Test G19:

Test G20-G21:

Normal Operation

NOTE: The occupant classification sensor is found only on the front passenger seat and is not equipped on all vehicles. A white tag having the letters "OCS" (occupant classification sensor) will appear under the front of the passenger seat to identify a seat equipped with an occupant classification sensor.

The restraints control module (RCM) checks the occupant classification sensor (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 flash either 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) 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 RCM monitors for the following fault conditions:
- Low resistance.
- Circuit open.
- Circuit short to battery.
- Circuit short to ground.

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