F 150 2WD Pickup V8-5.4L SOHC VIN 5 (2004)
Seat Occupant Sensor: Service and Repair
Occupant Classification Sensor - Service Kit, Early Build
OCCUPANT CLASSIFICATION SENSOR - SERVICE KIT, EARLY BUILD
Diagnostic Tool, Restraint System
SPECIAL TOOL(S)
REMOVAL
WARNING:
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Always wear safety glasses when repairing an air bag supplemental restraint system (SRS) vehicle and when handling an air bag module.
This will reduce the risk of injury in the event of an accidental deployment.
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Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
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The safety belt pretensioner is a pyrotechnic device. Always wear safety glasses when repairing an air bag equipped vehicle and when
handling a safety belt buckle pretensioner or safety belt retractor pretensioner. Never probe a pretensioner electrical connector. Doing so
could result in pretensioner or air bag deployment and could result in personal injury.
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The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could
result in injury and possible violation of vehicle safety standards.
CAUTION: It is necessary to rezero the OCS system when a front passenger seat cushion is disassembled, a new trim cover installed, or an
OCS service kit is installed. A scan tool is used to trigger the active command to carry out rezeroing of the OCS system.
NOTE:
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Occupant classification sensor (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.
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To identify between a production OCS system, an OCS system early build service kit (OCS service kit, early build), and an OCS system service kit
(OCS service kit) inspect the OCS ECU electrical connector.
A production OCS system allows the disconnect of the electrical connector from the OCS ECU.
An OCS system early build service kit (OCS service kit, early build) has the OCS ECU electrical connector glued to the ECU, it cannot and should not
be disconnected or altered. There is no in-line connector between the seat wiring harness and the OCS ECU.
An OCS system service kit (OCS service kit) has the OCS ECU electrical connector glued to the ECU, it cannot and should not be disconnected or
altered. An OCS system service kit also has an in-line 10-pin connector between the OCS ECU and the seat wiring harness.
NOTE:
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If removing an original equipment OCS, refer to Occupant Classification Sensor - Original Equipment. If removing a late build OCS service kit,
refer to Occupant Classification Sensor - Service Kit.
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The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
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Repair is made by installing a new part only. If the new part does not correct the condition, install the original part and carry out the diagnostic
procedure again.
1. WARNING: To avoid accidental deployment and possible personal injury, the backup power supply must be depleted before repairing
or replacing any front or side air bag supplemental restraint system (SRS) components and before servicing, replacing, adjusting or
striking components near the front or side air bag sensors, such as doors, instrument panel, console, door latches, strikers, seats and hood
latches.
The front impact severity sensor is located on the hood latch support bracket.
To deplete the backup power supply energy, disconnect the battery ground cable and wait at least one minute. Be sure to disconnect
