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Home >> Mazda >> 2007 >> B4000 Base, Automatic >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Air Bag System >> Occupant Classification Sensor >> Installation

Occupant Classification Sensor: Installation

WARNING:
  • Do not separate the OCS system components.
CAUTION:
  • Inspect the occupant classification sensor assembly, seat cushion frame and support assembly for any foreign objects, before installing the occupant classification sensor assembly to the seat cushion frame. If any foreign objects are found, remove them. Failure to do so may result in personal injury, in the event of an air bag deployment.
CAUTION:
  • Failure to route the seat occupant sensor components through the correct seat cushion support opening can cause component failure.
CAUTION:
  • While positioning the seat cushion pan and occupant classification sensor assembly, be careful not to damage any of the components. Failure to do so can result in component failure.
NOTE:
  • If the original equipment OCS is not being installed, install a service kit OCS using all parts in the kit.
  1. Position the OCS to the seat cushion frame.
    • Route the OCS bladder hose and pressure sensor, OCS module and seat wiring harness through the seat cushion pan opening.
    CAUTION:
    • An OCS service kit will have the OCS bladder attached to the seat cushion foam pad. Do not separate the OCS bladder from the seat cushion foam pad.
    NOTE:
    • A production OCS bladder is shown. An OCS service kit is similar.
  2. Install the 3 OCS bladder pin-type retainers to the seat cushion pan.
  3. Install the OCS module.
    • Slide the OCS module back on the OCS module bracket until it is fully seated and locked in past the OCS module bracket retainer.
    • Install the 2 screws in the OCS module.
    Fig 1: Locating Pressure Sensor
    G04930887Courtesy of MAZDA MOTORS CORP.
  4. Slide the pressure sensor on the bracket until it is fully seated and locked past the bracket retainer.
  5. Install the 2 seat wiring harness routing clips to the seat cushion pan.
    CAUTION:
    • Inspect the seat cushion pad and seat cushion trim cover for any foreign objects, before installing the seat cushion trim cover and the seat cushion pad. If any foreign objects are found, remove them. Failure to do so may result in personal injury, in the event of an air bag deployment.
  6. Install the seat cushion trim cover to the seat cushion foam pad with hog rings. The position the seat cushion trim cover and foam pad to the seat cushion pan.
  7. Attach the 5 seat cushion trim cover J-clips.
  8. Install the seat track assembly and the 4 bolts.

    Tightening Torque: 6 Nm {0.6 kgf-m, 53 in-lbf} 

  9. Attached the seat cushion trim cover rear J-clip.
    Fig 2: Locating Retainer Clip And Seat Wiring Harness Connector
    G04930884Courtesy of MAZDA MOTORS CORP.
  10. Install the seat wiring harness retainer clip and attach the seat wiring harness connector to the seat cushion pan.
  11. Install the seat backrest. See SEAT BACKREST FRONT - 60 PERCENT BENCH REMOVAL / INSTALLATION , or SEAT BACKREST FRONT - BUCKET AND 40 PERCENT BENCH REMOVAL / INSTALLATION .
  12. Install the passenger seat into the vehicle. See SEAT FRONT REMOVAL / INSTALLATION , .
    • Make sure the safety belts and buckles are accessible to the occupants after installation.
  13. Repower the SRS. Do not prove out the SRS at this time  . See DEPOWERING AND REPOWERING , .
    WARNING:
    • Do not separate the OCS system components.
    WARNING:
    • Make sure the front passenger seat repair is complete, the seat is completely assembled, all components (head restraint, seat side shield, etc.) are correctly installed and the front passenger seat is correctly installed to the vehicle before carrying out the OCS system reset. Failure to follow these instructions may increase the risk of personal injury or death in a crash
    CAUTION:
    • Make sure the seat is completely assembled before carrying out the OCS system reset active command.
    CAUTION:
    • The following precautions must be taken before carrying out the OCS system reset:
    • Make sure the OCS system components are connected and no faults are present.
    • Make sure the voltage to the OCS module is above 8.0 volts and less then 18.0 volts
    • Make sure the OCS system is not at a temperature below 6°C (42°F) or above 36°C (97°F) when initiating the OCS system reset process. If the vehicle has been exposed to extreme cold or hot temperatures, the vehicle must be exposed and kept at a temperature within the limits, 6°C to 36°C (42°F to 97°F) for a minimum of 30 minutes.
    • Make sure nothing is present on the passenger seat before carrying out the OCS system reset and nothing is placed on the seat during the process.
    • Make sure a minimum 4-second time period has passed after cycling the ignition switch ON before the carrying out the OCS system reset process.
    NOTE:
    • If the first attempt to carry out the OCS system reset is unsuccessful and DTC C1941 is reported, a second attempt must be made. If on the second attempt to carry out the OCS system reset is unsuccessful and DTC C1941 is reported a second time, a new OCS system service kit must be installed.
  14. Carry out the OCS system reset.
    • With the front passenger seat empty, use a IDS or equivalent tester to trigger the active command.
    NOTE:
    • The ignition switch must be cycled after the OCS reset.
  15. Prove out the SRS as follows:

    Turn the ignition key from ON to OFF. Wait 10 seconds, then turn the key back to ON and visually monitor the air bag indicator with the air bag modules installed. The air bag indicator will light continuously for approximately 6 seconds and then turn off. If an air bag SRS fault is present, the air bag indicator will:

    • fail to light.
    • remain lit continuously.
    • flash at a 5 Hz rate (RCM not configured).

    The air bag indicator might not light until approximately 30 seconds after the ignition switch has been turned from the OFF to the ON position. This is the time required fro the RCM to complete the testing of the SRS. If the air bag indicator is inoperative and a SRS fault exists, a chime will sound in a pattern of 5 sets of 5 beeps. If this occurs, the air bag indicator and any SRS fault discovered must be diagnosed and repaired.

    Clear all RCM and OCS module DTCs using the IDS or equivalent tester.

    NOTE:
    • A prepaid return postcard is provided with a new OCS service kit. The serial number for the new part and the vehicle identification number (VIN) must be recorded and sent to Mazda.
    • If a new OCS was installed, fill out the necessary information on the OCS traceability card and return it along with the complete inoperative OCS to Mazda.
    • When returning the inoperative OCS include: seat cushion foam pad, bladder electronic control unit, pressure sensor (transducer), hose, electrical connectors and wire harness (service part OCS only).
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