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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1401 (Supplemental Restraint System) >> Diagnosis And Testing >> Air Bag And Safety Belt PRETENSIONER Supplemental Restraint System (SRS) >> Pinpoint Tests >> Pinpoint Test D: DTC B2290 - Occupant Classification System Fault >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

The occupant classification sensor (OCS) system is used to classify the front passenger seat occupant in the event of a deployable impact. Refer to Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) .

The OCSM monitors the 2 OCS rails (weight sensors) and circuitry for faults. If the OCSM detects a fault with the sensor(s) or circuitry, it will store DTC B2290 in memory and send a message to the RCM which will store DTC B2290 in memory and send a message to the instrument cluster (IC) module to illuminate the air bag warning indicator.

Fault PIDsa Description Fault Trigger Condition
2290_8_OD and 2290_8_CM Passenger Seat OCS Sensor No.2 Circuit Short to Battery When the OCSM senses a short to voltage on either one of sensor 2 circuits, a fault will be indicated.
2290_9_OD and 2290_9_CM Passenger Seat OCS Sensor No.2 Circuit Short to Ground When the OCSM senses a short to ground on either one of sensor 1 circuits, a fault will be indicated.
2290_10_OD and 2290_10_CM Passenger Seat OCS Sensor No.2 Comm. Fault / Open When the OCSM is unable to communicate with sensor 2 or senses an open circuit, a fault will be indicated.
2290_11_OD and 2290_11_CM Passenger Seat OCS Sensor No.2 Internal Fault When the OCSM senses an internal failure with sensor 2, a fault will be indicated.
2290_12_OD and 2290_12_CM Passenger Seat OCS Sensor No.1 Circuit Short to Battery When the OCSM senses a short to voltage on either one of sensor 2 circuits, a fault will be indicated.
2290_13_OD and 2290_13_CM Passenger Seat OCS Sensor No.1 Circuit Short to Ground When the OCSM senses a short to ground on either one of sensor 2 circuits, a fault will be indicated.
2290_14_OD and 2290_14_CM Passenger Seat OCS Sensor No.1 Comm. Fault/Open When the OCSM is unable to communicate with sensor 1 or senses an open circuit, a fault will be indicated.
2290_15_OD and 2290_15_CM Passenger Seat OCS Sensor No.1 Internal Fault When the OCSM is unable to communicate with sensor 1 or senses an open circuit, a fault will be indicated.

a Fault PIDs that end in OD indicate an on-demand status and are associated with on-demand DTC B2290. Fault PIDs that end in CM indicate continuous memory status and are associated with continuous DTC B2290.

This pinpoint test is intended to diagnose the following:

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