Five Hundred AWD V6-3.0L VIN 1 (2005)
the OCS system.
NOTE:
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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 and a service OCS system (OCS service kit), inspect the electronic control unit (ECU) electrical
connector. A production OCS system allows the disconnection of the ECU electrical connector. A service OCS system (OCS service kit) has the
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.
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The heated seat element on the front passenger seat cushion is not serviceable separately. If a new heated seat element is needed on the front
passenger seat cushion, a new occupant classification sensor (OCS) service kit and a new heated seat element must be installed.
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If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered.
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The air bag warning lamp illuminates when the restraint control module (RCM) fuse is removed and the ignition switch is ON. This is normal
operation and does not indicate a SRS fault.
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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.
All seats
1. Position the seat to access all the seat track-to-floor pan bolts and the safety belt anchor.
2. Depower the SRS.
3. Remove the front seat.
4. Remove the front seat backrest.
5. Remove the seat track.
Seats with an OE OCS
6. Disconnect the occupant classification sensor (OCS) pressure sensor electrical connector.
7. Remove the OCS bladder pin type retainers.
8. NOTE: Make note of the opening that the pressure sensor and hose are being fed through on the seat cushion support assembly for installation
purposes.
Remove the OCS bladder, hose and pressure sensor from the seat cushion frame.
