Pinpoint Test Bi: U3000:41, U3000:42, U3000:46

Normal Operation and Fault Conditions

The OCS sensor is internal to the OCSM and cannot be serviced separately. REFER to: Airbag and Seatbelt Pretensioner Supplemental Restraint System (SRS) - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
OCSM U3000:41	Control Module: General Checksum Failure	This DTC sets due to an internal fault with the OCSM.
OCSM U3000:42	Control Module: General Memory Failure	This DTC sets due to an internal fault with the OCSM.
OCSM U3000:46	Control Module: Calibration / Parameter Memory Failure	This DTC sets due to an internal fault with the OCSM.

Possible Sources

OCSM
OCS sensor

WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.

NOTE: Only disconnect or reconnect SRS components when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.

NOTE: Always make sure the correct SRS component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to make sure the correct component is being installed. If an incorrect SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

BI1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)

WARNING: Before beginning any service procedure, refer to Safety Warnings in General Information. Failure to follow this instruction may result in serious personal injury.

Using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs).

NOTE: When selecting Restraints from the Self Test menu, DTCs are retrieved from the RCM, OCSM and BECMB.

Using a diagnostic scan tool, perform

Restraints self-test.

Did the DTC return?

Yes	INSTALL a new OCSM and impact sensors. REFER to: Occupant Classification System (OCS) Sensor .

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.