ParkAvenue 1997-1999

System Components

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Arming & Forward Sensors



Specific to:

Buick Park Avenue 1996-1999

Oldsmobile Delta 88 1986-1988

All sensors are specifically calibrated to each series vehicle and keyed to the mounting brackets. Great care must be taken to mount the correct sensors on the vehicle being serviced. The sensors, mounting brackets and wiring harness must never be modified from original design.

The forward sensor is a normally open switch. In an accident, the sensor closes and the electrical circuit is complete. If the forward sensor and the arming sensor close at the same time the air bag will deploy.

The arming sensor is a normally open switch that closes during deceleration encountered in an accident. The arming sensor is wired in series with the steering module. A resistor is connected in parallel with the switch and allows a small amount of current to flow through the circuit for diagnostic purposes.

Energy Reserve Module



Specific to:

Buick Park Avenue 1996-1999

Oldsmobile Delta 88 1986-1988

The reserve module provides sufficient electrical power to deploy the air bag even if the vehicle battery is damaged or disconnected.

Fuse Panel



Specific to:

Buick Park Avenue 1996-1999

Oldsmobile Delta 88 1986-1988

Some vehicles with have a specific fuse panel located in the lower instrument panel trim pad. It is hinged to swing out for easy access. On other models the IR fuse is located with the other fuses.



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Fig. Location of the Oldsmobile IR air bag system fuse

Indicator Lamp



Specific to:

Buick Park Avenue 1996-1999

Oldsmobile Delta 88 1986-1988

The red INFLATABLE RESTRAINT lamp will light for 5-15 seconds when the ignition is turned ON . This informs the driver that the system is functioning properly. If the lamp does not operate correctly, this indicates an IR system fault and the system should be checked.

Inflator Module



Specific to:

Buick Park Avenue 1996-1999

Oldsmobile Delta 88 1986-1988

The inflator module, consists of the air bag, electrical initiator and inflator assembly. If an accident occurs, the inflatable bag is deployed by a gas producing generator. The trim cover opens at the seam as the bag is deployed.

Knee Bolster



Specific to:

Buick Park Avenue 1996-1999

Oldsmobile Delta 88 1986-1988

The knee bolster is used to absorb energy and control the driver's forward movement during an accident by limiting leg movement.

Passenger Compartment Sensor/Diagnostic Module



Specific to:

Buick Park Avenue 1996-1999

Oldsmobile Delta 88 1986-1988

The PCSDM contains the passenger compartment sensor and the diagnostic module. The diagnostic module processes the vehicle deceleration and forward sensor signal to determine if deployment is necessary. A deployment signal is sent to the inflator module when the forward sensor or when passenger compartment sensor closes and the arming sensor closes at the same time. This module also controls the indicator lamp.

This system can store codes, but they must be read with tester J-36884, or equivalent. This system utilizes the indicator lamp to warn of a problem, but flash code diagnostics are not possible.



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Fig. Oldsmobile IR air bag system components



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Fig. Oldsmobile IR system components located under the front seat

Power Supply Module



Specific to:

Buick Park Avenue 1996-1999

Oldsmobile Delta 88 1986-1988

The power supply module provides a boosted voltage to the IR system to ensure deployment during low voltage conditions, perform limited internal diagnostics and monitor the integrity of the IR wiring and 8-terminal connector.

Wiring Harness And Connectors



Specific to:

Buick Park Avenue 1996-1999

Oldsmobile Delta 88 1986-1988

The wiring harness and connectors for the IR system are of special design. Any wiring repairs should be done using tool kit J-38125, or equivalent. Always use the crimp and seal splice sleeves contained in this wiring repair kit. If damage is done to a component pigtail the component must be replaced.

The Initiator circuit has a special yellow shorting bar connectors that help prevent accidental deployment during service. The IR wire harness components are part of the body wiring harness assembly. Sections of harness which include more than a 1 IR wire are wrapped in yellow tape.

 
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