Question about 2007 Lincoln MKZ

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Where is passenger side air bag relay 2007 MKZ

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  • Lincoln Master
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There is no relay for the passenger side air bag . What seams to be the trouble ? There is possibly a code set in the air bag control module .
Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) The air bag supplemental restraint system (SRS) is designed to provide increased collision protection for front seat and second row outboard occupants, in addition to that provided by the 3-point safety belt system. Safety belt use is necessary to obtain the best occupant protection and to receive the full advantage of the SRS.
This vehicle line contains dual stage deployment (advanced restraint system) driver and front passenger air bag modules. These vehicles are also equipped with driver and front passenger safety belt retractor pretensioners. These vehicles can also be equipped with optional side air curtains that deploy from the A-pillar to the C-pillar upon a side impact. Vehicles with optional side air curtains are also equipped with seat side air bag modules in the front seats.
Side air curtains deploy from the headliner, protecting the first and second row outboard occupants during a side impact. Seat side air bag modules deploy from the outboard front seat backrest upon a side impact. In addition, a front impact severity sensor is mounted to the lower radiator support, a seat position sensor is mounted to the driver seat and a usage detection switch is added to the front driver and passenger outboard buckles. If equipped with optional side air curtain modules and seat side air bag modules, there are an additional 4 side impact sensors.
Vehicles are also equipped with an occupant classification sensor (OCS) system as part of the front passenger seat. The OCS system includes 2 OCS rails and an OCS module.
Passenger Air Bag Deactivation (PAD) Indicator
The passenger air bag deactivation (PAD) indicator is a visual indicator used to inform the front seat occupants of the passenger air bag deactivation state. The PAD indicator is a stand-alone lamp installed into the vehicle instrument panel in a position visible to each front seat occupant.
The restraints control module (RCM) controls the state of the PAD indicator through a direct hardwire connection, based on information provided by the occupant classification sensor (OCS) system. The PAD indicator is lit to indicate the passenger air bag module is disabled. An exemption to this is when the front passenger seat is determined to be empty and passenger safety belt buckle unbuckled, and therefore indication of a deactivated passenger air bag module is not necessary. In all other cases, the PAD indicator is unlit when the passenger air bag module is enabled.
When the ignition switch is in the ON position, the PAD indicator prove-out period is initiated by the RCM. The RCM briefly activates the PAD indicator to prove-out the indicator function and verify to the front occupants correct functional operation of the PAD indicator.
The PAD indicator will be lit/unlit within 1.0 to 1.5 seconds of a change of state from the OCS system.
When an OCS system fault is present, the RCM defaults the passenger air bag module to the last valid state received from the OCS system until the ignition switch is turned OFF. If the OCS system fault is still present when the ignition switch is turned ON, the RCM defaults the passenger air bag module to enabled regardless of the size of occupant in the front passenger seat. The PAD indicator will be unlit. For information on the OCS system, refer to Occupant Classification Sensor System in this section.
The following table indicates the passenger air bag status and the PAD indicator status based the size of the front outboard passenger occupant.

Posted on Oct 05, 2015

Testimonial: "Thanks for posting this information. it is very helpful. Took vehicle to dealer, was told I had fault in OCS system and side curtain sensor was bad, passenger seat. Can I replace OCS sensor myself? Dealer wanted to charge about 800.00 to repair."

  • Jeff Armer Oct 18, 2015

    You mite be able to , you would have to remove that seat from the vehicle! After you replaced it you would need to take the vehicle to the dealer for calibration - need factory scan tool for that !
    CAUTION: Use care when handling the seat and track assembly. Dropping the assembly or sitting on a seat not secured in the vehicle may result in damaged components.

    NOTE: If a seat equipped with a SRS component is being serviced, the SRS must be depowered.

    NOTE: The air bag warning lamp illuminates when the restraints control module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a SRS fault.

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

    NOTE: Repair is made by installing a new part only. If the new part does not correct the condition, install the original part and perform the diagnostic procedure again.

    NOTE: Outboard shown, inboard similar.

    All occupant classification sensor (OCS) rails


    Remove the passenger seat and depower the system. For additional information, refer to Section 501-10 .
    Outboard OCS rail


    If equipped, remove the manual lumbar control knob.
    If equipped, remove the spring clip and the manual recliner handle.
    Detach and position aside the cushion side shield.
    Pull the side shield away from the seat cushion at the front edge and release the forward and side retainers.
    Pull the side shield rearward to release the rear retainer and detach the cushion side shield.
    Seat receiving a new OCS rail


    Remove the bolt and the forward seat riser from the affected side occupant classification sensor (OCS) rail.
    Remove the 2 bolts and the rearward seat riser from the affected side OCS rail.
    All OCS rails


    CAUTION: Push only on the tip of the OCS electrical connector release tab to release the electrical connector. Do not insert the tool too deep into the OCS electrical connector or damage to the electrical connector may occur.

    NOTE: Note the position and the routing of the OCS rail electrical wiring and connector for installation.

    On the affected side, using a suitable tool, release the tab and disconnect the OCS rail electrical connector.
    If equipped, disconnect the power seat track motor electrical connector.
    Move the seat to the forward most position.
    If equipped with a power seat track, apply power and ground to the pins shown.

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