Chrysler Town, Dodge Caravan. Manual — part 132
CLOCK SPRING
DESCRIPTION
The clock spring is screwed to a plastic mounting
platform on the steering column behind the steering
wheel. The clock spring is used to maintain a contin-
uous electrical circuit between the wiring harness
and the drivers airbag.
OPERATION
This assembly consists of a flat ribbon like electri-
cally conductive tape which winds and unwinds with
the steering wheel rotation. The clock spring cannot
be repaired. If the clock spring is faulty, damaged, or
if the airbag has been deployed, the clock spring
must be replaced.
STANDARD PROCEDURE - CLOCK SPRING
CENTERING
If the rotating tape (wire coil) in the clock spring is
not positioned properly with the steering wheel and
the front wheels, the clock spring may fail. The fol-
lowing procedure MUST BE USED to center the
clock spring if it is not known to be properly posi-
tioned, or if the front wheels were moved from the
straight ahead position.
(1) Position
steering
wheel
and
front
wheels
straight ahead.
(2) Release hood latch and open hood.
(3) Disconnect and isolate the battery negative
cable.
(4) Wait two minutes for the system reserve capac-
itor to discharge before beginning any airbag compo-
nent service.
(5) Remove driver airbag from steering wheel
(Refer to 8 - ELECTRICAL/RESTRAINTS/DRIVER
AIRBAG - REMOVAL).
(6) Disconnect wire connectors from back of driver
airbag.
(7) Disconnect the 2–way connector from remote
radio control harness.
(8) Disconnect the 4–way harness connector from
the speed control/horn harness to the clock spring.
(9) Remove steering wheel (Refer to 19 - STEER-
ING/COLUMN/STEERING WHEEL - REMOVAL).
(10) Rotate the clock spring rotor clockwise until
the rotor stops. Do not apply excessive force.
(11) From the end of travel, rotate the rotor two
turns counterclockwise until the wires end up at the
top.
(12) Install the steering wheel (Refer to 19 -
STEERING/COLUMN/STEERING
WHEEL
-
INSTALLATION).
(13) Connect the 4–way harness connector to the
speed control/horn harness to the clock spring.
(14) Connect the 2–way connector to the remote
radio control harness.
(15) Install the driver airbag (Refer to 8 - ELEC-
TRICAL/RESTRAINTS/DRIVER AIRBAG - INSTAL-
LATION). Torque the two screws to 10 N·m (90 in.
lbs.).
WARNING: DO NOT CONNECT THE BATTERY NEG-
ATIVE
CABLE.
REFER
TO
ELECTRICAL,
RESTRAINTS, DIAGNOSIS AND TESTING - AIRBAG
SYSTEM FIRST.
REMOVAL
(1) Position
steering
wheel
and
front
wheels
straight ahead.
(2) Release hood latch and open hood.
(3) Disconnect and isolate the battery negative
cable.
(4) Wait two minutes for the system reserve capac-
itor to discharge before beginning any airbag compo-
nent service.
(5) Remove driver airbag from steering wheel
(Refer to 8 - ELECTRICAL/RESTRAINTS/DRIVER
AIRBAG - REMOVAL).
(6) Disconnect wire connectors from back of driver
airbag.
(7) Disconnect the 2–way connector from remote
radio control harness.
(8) Disconnect the 4–way harness connector from
the speed control/horn harness to the clock spring.
(9) Remove steering wheel (Refer to 19 - STEER-
ING/COLUMN/STEERING WHEEL - REMOVAL).
(10) Remove steering column shrouds and discon-
nect traction control wire connector (if equipped)
(Refer
to
19
-
STEERING/COLUMN/LOWER
SHROUD - REMOVAL).
(11) Disconnect
4-way
and
6-way
connectors
between the clock spring and the instrument panel
wiring harness.
Fig. 1 VACUUM HEATER AND A/C OUTLETS -
TYPICAL
8O - 4
RESTRAINTS
RS
RESTRAINTS (Continued)
(12) Remove clock spring from column assembly by
removing the two retaining screws that attach the
clock spring to the column.
INSTALLATION
(1) Install the clock spring on the column.
(2) Connect
the
4-way
and
6-way
connectors
between the clock spring and the instrument panel
wiring harness.
(3) Install the steering column shrouds and con-
nect traction control wire connector (if equipped)
(Refer
to
19
-
STEERING/COLUMN/LOWER
SHROUD - INSTALLATION).
(4) Install the steering wheel (Refer to 19 -
STEERING/COLUMN/STEERING
WHEEL
-
INSTALLATION).
(5) Connect the 4–way harness connector to the
speed control/horn harness to the clock spring.
(6) Connect the 2–way connector to the remote
radio control harness.
(7) Install the driver airbag (Refer to 8 - ELEC-
TRICAL/RESTRAINTS/DRIVER AIRBAG - INSTAL-
LATION). Torque the two screws to 10 N·m (90 in.
lbs.).
WARNING: DO NOT CONNECT THE BATTERY NEG-
ATIVE
CABLE.
REFER
TO
ELECTRICAL,
RESTRAINTS, DIAGNOSIS AND TESTING - AIRBAG
SYSTEM FIRST.
DRIVER AIRBAG
DESCRIPTION
The Driver Airbag is located in the center of the
steering wheel. The most visible part of the airbag is
the cover/horn switch. The Driver Airbag and Driver
Airbag Cover/Horn Pad are serviced separately from
each other.
OPERATION
The Driver Airbag cover contains the horn switch,
inflator device, and a fabric bag. The airbag cover/
horn switch is serviced separately from the inflator
and bag components.
When the front airbag system is deployed, the fol-
lowing MUST be replaced:
• Complete Steering Column Assembly.
• Lower Steering Column Coupler.
• Steering Wheel.
• Clock Spring.
• Driver Airbag
• Passenger Airbag
• Upper Instrument Panel with Pad.
CARE OF UNDEPLOYED AIRBAGS
Airbags must be stored in their original special
container until used for service. At no time should a
source of electricity be permitted near the inflator on
the back of an airbag. When carrying or handling an
undeployed airbag, the trim side of the airbag should
be pointing away from the body to minimize possibil-
ity of injury if accidental deployment occurs. Do not
place undeployed airbag face down on a solid surface,
the airbag will propel into the air if accidental
deployment occurs.
REMOVAL
DEPLOYED AIRBAG
(1) Clean powder residue from interior of vehicle
(Fig. 1).
(2) Position
steering
wheel
and
front
wheels
straight ahead.
(3) Release hood latch and open hood.
(4) Disconnect and isolate the battery negative
cable.
(5) Wait two minutes for the system reserve capac-
itor to discharge before beginning any airbag compo-
nent service.
(6) Remove two screws retaining driver airbag to
steering wheel.
(7) Disconnect wire connectors from back of driver
airbag.
(8) Disconnect the 2–way connector from remote
radio control harness.
(9) Disconnect the 4–way harness connector from
the speed control/horn harness to the clock spring.
(10) Remove steering wheel (Refer to 19 - STEER-
ING/COLUMN/STEERING WHEEL - REMOVAL).
(11) Remove steering column shrouds and discon-
nect traction control wire connector (if equipped)
(Refer
to
19
-
STEERING/COLUMN/LOWER
SHROUD - REMOVAL).
(12) Disconnect
4-way
and
6-way
connectors
between the clock spring and the instrument panel
wiring harness.
(13) Remove clock spring from column assembly by
removing the two retaining screws that attach the
clock spring to the column.
NOTE: The clock spring, steering wheel, and com-
plete steering column assembly w/lower steering
column coupler must be replaced also in the event
of a driver airbag deployment
UNDEPLOYED AIRBAG
(1) Release hood latch and open hood.
(2) Disconnect and isolate the battery negative
cable.
RS
RESTRAINTS
8O - 5
CLOCK SPRING (Continued)
(3) Wait two minutes for the system reserve capac-
itor to discharge before beginning any airbag compo-
nent service.
(4) Remove two screws retaining driver airbag to
steering wheel.
(5) Disconnect wire connectors from back of driver
airbag (Fig. 2).
(6) Disconnect the 2–way connector from remote
radio control harness.
(7) Disconnect the 4–way harness connector from
the speed control/horn harness to the clock spring.
INSTALLATION
DEPLOYED AIRBAG
(1) Perform clean up procedure (Refer to 8 - ELEC-
TRICAL/RESTRAINTS - STANDARD PROCEDURE
- SERVICE AFTER AN AIRBAG DEPLOYMENT).
(2) Install a new steering column assembly and
lower steering column coupler (Refer to 19 - STEER-
ING/COLUMN - INSTALLATION).
(3) Install the new clock spring.
(4) Connect
the
4-way
and
6-way
connectors
between the clock spring and the instrument panel
wiring harness.
(5) Install the steering column shrouds and con-
nect traction control wire connector (if equipped)
(Refer
to
19
-
STEERING/COLUMN/LOWER
SHROUD - INSTALLATION).
(6) Install the steering wheel (Refer to 19 -
STEERING/COLUMN/STEERING
WHEEL
-
INSTALLATION).
(7) Connect the 4–way harness connector to the
speed control/horn harness to the clock spring.
(8) Connect the 2–way connector to the remote
radio control harness.
(9) Install the driver airbag and the two screws
retaining the airbag. Tighten screws to 10 N·m (90
in. lbs.)
WARNING: DO NOT CONNECT THE BATTERY NEG-
ATIVE
CABLE.
REFER
TO
ELECTRICAL,
RESTRAINTS, DIAGNOSIS AND TESTING - AIRBAG
SYSTEM FIRST.
UNDEPLOYED AIRBAG
(1) Connect the harness connector on the DAB
cover (horn, speed controls) to the clock spring.
(2) Connect the squib connectors to the DAB.
(3) Position a new airbag into the airbag cavity.
(4) Install the two screws retaining the airbag.
Tighten screws to 10 N·m (90 in. lbs.)
WARNING: DO NOT CONNECT THE BATTERY NEG-
ATIVE
CABLE.
REFER
TO
ELECTRICAL,
RESTRAINTS, DIAGNOSIS AND TESTING - AIRBAG
SYSTEM FIRST.
DRIVER AIRBAG TRIM COVER
REMOVAL
The horn switch is integral to the driver airbag
trim cover. If either component is faulty or damaged,
the entire driver airbag trim cover and horn switch
unit must be replaced.
(1) Disconnect and isolate the battery negative
cable. Wait two minutes for the system capacitor to
discharge.
(2) Remove the driver airbag from the steering
wheel (Refer to 8 - ELECTRICAL/RESTRAINTS/
DRIVER AIRBAG - REMOVAL).
(3) Remove the plastic wire retainer that captures
the horn switch feed pigtail wire between the upper
left inflator stud and the inflator on the back of the
driver airbag housing and disconnect the speed con-
trol switches (if equipped).
(4) Remove the four nuts that secure the trim
cover retainer to the studs on the back of the driver
airbag housing.
(5) Remove the horn switch ground pigtail wire
eyelet terminal from the upper left airbag housing
stud.
(6) Remove the trim cover retainer from the airbag
housing studs.
(7) Disengage the six trim cover locking blocks
from the lip around the outside edge of the driver
airbag housing and remove the housing from the
cover.
Fig. 2 DRIVER AIRBAG WIRE CONNECTIONS
1 - AIRBAG SQUIB CONNECTORS
2 - DRIVER AIRBAG
3 - HORN/SPEED CONTROL CONNECTOR
4 - CLOCK SPRING
8O - 6
RESTRAINTS
RS
DRIVER AIRBAG (Continued)
INSTALLATION
(1) Install the housing into the cover. Engage the
six trim cover locking blocks to the lip around the
outside edge of the driver airbag housing.
(2) Install the trim cover retainer to the airbag
housing studs.
(3) Install the horn switch ground pigtail wire eye-
let terminal to the upper left airbag housing stud.
(4) Install the four nuts that secure the upper and
lower trim cover retainers to the studs on the back of
the driver airbag housing. Torque nuts to 6.8 N·m (60
in. lbs.).
(5) Install the plastic wire retainer that captures
the horn switch feed pigtail wire between the upper
left inflator stud and the inflator on the back of the
driver airbag housing.
(6) Connect speed control switches (if equipped).
(7) Install the driver airbag onto the steering
wheel (Refer to 8 - ELECTRICAL/RESTRAINTS/
DRIVER AIRBAG - INSTALLATION).
WARNING: DO NOT CONNECT THE BATTERY NEG-
ATIVE CABLE. FIRST (Refer to 8 - ELECTRICAL/RE-
STRAINTS/DIAGNOSIS AND TESTING - AIRBAG
SYSTEM).
OCCUPANT RESTRAINT
CONTROLLER
DESCRIPTION
The front driver and passenger airbag system is
designed to reduce the risk of fatality or serious
injury, caused by a frontal impact of the vehicle.
The Occupant Restraint Controller (ORC) is also
sometimes referred to as the Airbag Control Module
(ACM). The ORC contains the impact sensor and
energy reserve capacitor. It is mounted on a bracket,
under the instrument panel, just forward of the stor-
age bin. The ORC monitors the system to determine
the system readiness. The ORC contains on-board
diagnostics and will light the AIRBAG warning lamp
in the message center when a problem occurs.
OPERATION
The impact sensor provides verification of the
direction and severity of the impact. One impact sen-
sor is used. It is located inside the Occupant
Restraint Controller (ORC). The impact sensor is an
accelerometer that senses deceleration. The decelera-
tion pulses are sent to a microprocessor which con-
tains a decision algorithm. When an impact is severe
enough to require airbag protection, the ORC micro-
processor sends a signal that completes the electrical
circuit to the driver and passenger airbags. The
impact sensor is calibrated for the specific vehicle
and reacts to the severity and direction of an impact.
REMOVAL
NOTE: Diagnose the ORC using the service/diag-
nostic manual.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove storage bin from instrument panel.
Refer to Body, Instrument Panel, Storage Bin,
Removal.
(3) Remove three bolts holding ORC to floor
bracket.
(4) Disconnect the wire connector from ORC.
(5) Remove the ORC assembly from vehicle.
INSTALLATION
WARNING: DO NOT INSTALL ORC IF MOUNTING
LOCATION IS DEFORMED OR DAMAGED.
CAUTION: Use correct screws when installing the
ORC.
(1) Install the ORC assembly into vehicle.
(2) Connect the wire connector to the ORC.
(3) Install
three
bolts
holding
ORC
to
floor
bracket. Torque bolts to 7.3 - 9.6 N·m (65 to 85 in.
lbs.)
(4) Install the storage bin onto the instrument
panel. Refer to Body, Instrument Panel, Storage Bin,
Installation.
WARNING: DO NOT CONNECT THE BATTERY NEG-
ATIVE
CABLE.
REFER
TO
ELECTRICAL,
RESTRAINTS, DIAGNOSIS AND TESTING - AIRBAG
SYSTEM FIRST.
PASSENGER AIRBAG
DESCRIPTION
WARNING: NEVER DISASSEMBLE THE PASSEN-
GER AIRBAG, THE PASSENGER AIRBAG HAS NO
SERVICEABLE PARTS.
The Passenger Airbag is located beneath the
instrument panel and pad assembly. The airbag is
mounted to the back side of the instrument panel
reinforcement.
The instrument panel top pad is the most visible
part of the passenger airbag system. Located under
the instrument panel top pad are the airbag door, the
RS
RESTRAINTS
8O - 7
DRIVER AIRBAG TRIM COVER (Continued)
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