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Chrysler 300/300 Touring/300C, Dodge Magnum. Manual - part 746

3. Install the upper B-pillar trim (Refer to 23 - BODY/

INTERIOR/B-PILLAR TRIM - INSTALLATION).

4. Position the upper turning loop (3) and install the

retaining bolt (4). Torque bolt to 40 N·m (30 ft. lbs.).

5. Install the upper turning loop (3) trim cover (2).

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RESTRAINTS - SERVICE INFORMATION

IMPACT SENSOR

DESCRIPTION

FRONT IMPACT SENSORS

Two front impact sensors (1) are used on this model,
one each for the left and right sides of the vehicle.
These sensors are mounted remotely from the impact
sensor that is internal to the Occupant Restraint Con-
troller (ORC). Each front sensor is secured with two
screws (2) to the backs of the right and left vertical
members of the radiator support within the engine
compartment.

The right and left front impact sensors are identical in
construction and calibration. A cavity in the center of
the molded black plastic impact sensor housing con-
tains the electronic circuitry of the sensor which
includes an electronic communication chip and an
electronic impact sensor. Potting material fills the cav-
ity to seal and protect the internal electronic circuitry
and components.

The impact sensors cannot be repaired or adjusted
and, if damaged or faulty, they must be replaced.

SIDE IMPACT SENSORS

Four side impact sensors are used on this model
when it is equipped with the curtain airbags, two each
for the left and right sides of the vehicle. The sedan
and wagon side impact sensor locations are identical.
These sensors are mounted remotely from the impact
sensor that is internal to the Occupant Restraint Con-
troller (ORC). Each side sensor is secured with two
screws to the inner right or left B-pillar and C-pillar
within the passenger compartment.

RESTRAINTS - SERVICE INFORMATION

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The right and left side impact sensors are identical in
construction and calibration. A cavity in the center of
the molded black plastic impact sensor housing con-
tains the electronic circuitry of the sensor which
includes an electronic communication chip and an
electronic impact sensor. Potting material fills the cav-
ity to seal and protect the internal electronic circuitry
and components.

The impact sensors cannot be repaired or adjusted
and, if damaged or faulty, they must be replaced.

OPERATION

FRONT IMPACT SENSORS

The front impact sensors are electronic accelerometers that sense the rate of vehicle deceleration, which provides
verification of the direction and severity of an impact. Each sensor also contains an electronic communication chip
that allows the unit to communicate the sensor status as well as sensor fault information to the microprocessor in
the Occupant Restraint Controller (ORC).

The ORC microprocessor continuously monitors all of the passive restraint system electrical circuits to determine the
system readiness. If the ORC detects a monitored system fault, it sets a Diagnostic Trouble Code (DTC) and con-
trols the airbag indicator operation accordingly. The impact sensors each receive battery current and ground through
dedicated left and right sensor plus and minus circuits from the ORC. The impact sensors and the ORC commu-
nicate by modulating the voltage in the sensor plus circuit.

The most reliable, efficient, and accurate means to diagnose the impact sensors, the ORC, and the electronic mes-
sage communication between the sensors and the ORC requires the use of a scan tool and the appropriate diag-
nostic information.

SIDE IMPACT SENSORS

The side impact sensors are electronic accelerometers that sense the rate of vehicle deceleration, which provides
verification of the direction and severity of an impact. Each sensor also contains an electronic communication chip
that allows the unit to communicate the sensor status as well as sensor fault information to the microprocessor in
the Occupant Restraint Controller (ORC).

The ORC microprocessor continuously monitors all of the side passive restraint system electrical circuits to deter-
mine the system readiness. If the ORC detects a monitored system fault, it sets a Diagnostic Trouble Code (DTC)
and controls the airbag indicator operation accordingly. The impact sensors each receive battery current and ground
through the same left or right sensor plus and minus circuits in a series arrangement from the ORC. The impact
sensors and the ORC communicate by modulating the voltage in the sensor plus circuit.

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RESTRAINTS - SERVICE INFORMATION

REMOVAL

FRONT IMPACT SENSOR

1. Disconnect and isolate the battery negative cable.

WARNING: Wait two minutes for the airbag system
reserve capacitor to discharge before beginning
any airbag system or component service. Failure
to do so may result in accidental airbag deploy-
ment, personal injury or death.

NOTE: If replacing the left front impact sensor, the
air intake system needs to be removed (Refer to 9
- ENGINE/AIR INTAKE SYSTEM - REMOVAL).

2. Disconnect the electrical connector (3).

3. Remove the two mounting screws (2).

SIDE IMPACT SENSOR

B-PILLAR MOUNTED SIDE IMPACT SENSOR

1. Disconnect and isolate the battery negative cable.

2. Remove the B-pillar trim panel (Refer to 23 -

BODY/INTERIOR/B-PILLAR TRIM - REMOVAL).

3. Disconnect the electrical connector (1).

4. Remove the two retaining screws (2).

RESTRAINTS - SERVICE INFORMATION

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