2005 CHRYSLER CARAVAN weight

SEAT BELT TENSIONER
DESCRIPTION
The seat belt system incorporates Seat Belt Ten-
sioners. The tensioner is designed to hold the occu-
pant in their respective seat by retracting the seat
belt up to four inches. They are integral to the front
seat belt buckles and cannot be serviced. If found
defective they must be replaced. After an airbag
deployment, the tensioner must be replaced.
Seat Belt Tensioners supplement the dual front air-
bag system. The seat belt tensioners are integral to
the front seat belt buckles, which are secured to the
seat cushion frame on the inboard side. The seat belt
tensioners are controlled by the Occupant Restraint
Controller (ORC) and are connected to the vehicle
electrical system through the body wire harness.
The seat belt tensioners cannot be repaired and, if
faulty or damaged, the entire front seat belt buckle
must be replaced. The seat belt tensioners are not
intended for reuse and must be replaced following
any front airbag deployment.
OPERATION
WARNING: When the front airbag is deployed, the
tensioner will have deployed also and should be
replaced. Failure to do so could result in occupant
personal injury or death.
The seat belt tensioners are deployed by a signal
generated by the Occupant Restraint Controller
(ORC) through the driver or passenger seat belt ten-
sioner line 1 and line 2 (or squib) circuits. When the
ORC sends the proper electrical signal to the tension-
ers, the electrical energy generates enough heat to
initiate a small pyrotechnic gas generator.
Removing excess slack from the front seat belts not
only keeps the occupants properly positioned for an
airbag deployment following a frontal impact of the
vehicle, but also helps to reduce injuries that the
occupants of the front seat might experience in these
situations as a result of a harmful contact with the
steering wheel, steering column, instrument panel
and/or windshield.
The ORC monitors the condition of the seat belt
tensioners through circuit resistance, and will illumi-
nate the airbag indicator in the ElectroMechanical
Instrument Cluster (EMIC) and store a Diagnostic
Trouble Code (DTC) for any fault that is detected.
For proper diagnosis of the seat belt tensioners, use a
scan tool and the appropriate diagnostic information.
SEAT WEIGHT BLADDER &
PRESSURE SENSOR
DESCRIPTION
Vehicles equipped with the Occupant Classification
System (OCS) have a seat weight bladder and pres-
sure sensor unit (Fig. 54) that is integral to the pas-
senger front seat cushion. The bladder is sandwiched
between the seat cushion pan and seat cushion foam.
The bladder consists of two rectangular sheets of
an elastomeric material and a molded plastic elbow
fitting. The two sheets of material are sealed
together around their perimeter and heat staked to
each other at numerous regular points within their
field. The elbow fitting is sealed to a small round
hole in the lower surface of the bladder and is
pointed downward where it passes through a clear-
ance hole in the insulator pad and extends to just
below the seat cushion. The bladder is then filled
with a silicone fluid to become a pliable, quilted
membrane.
Under the seat cushion a short tube is securely
clamped at one end to the bladder nipple, and at the
other end to a nipple on the electronic pressure sen-
sor. The sensor housing features an integral mount
that snaps over a tab integral to the stamped steel
Occupant Classification Module (OCM) mounting
bracket welded to the underside of the passenger
front seat cushion frame.
Fig. 54 SEAT WEIGHT BLADDER AND PRESSURE
SENSOR - TYPICAL
1 - FASTENER (2)
2 - BLADDER
3-PAD
4 - TUBE
5 - PRESSURE SENSOR
RSRESTRAINTS8O-43

The seat weight bladder and pressure sensor can-
not be adjusted or repaired. The components of the
passenger front seat cushion of a vehicle equipped
with the OCS including the cushion frame, seat
weight bladder and pressure sensor, seat cushion
foam, wire harness and the OCM are serviced only as
a factory-calibrated, assembled and tamper-evident
unit. Only the OCM and the seat cushion trim are
available for separate service replacement. Once a
service replacement package has been installed in a
vehicle, the OCM can thereafter be serviced only by
replacing the entire passenger front seat cushion unit
with another complete service replacement package.
OPERATION
The seat weight bladder and pressure sensor unit
is designed to sense the relative weight of a load
applied to the passenger front seat cushion, which
provides a logic input to the microprocessor of theOccupant Classification Module (OCM). When a load
is applied to the seat cushion, fluid within the blad-
der becomes pressurized. These changes in bladder
fluid pressure are measured by the pressure sensor
under the seat cushion through the bladder tube. As
the pressure within the bladder changes, the cir-
cuitry of the pressure sensor changes the output volt-
age of the sensor.
The pressure sensor receives a nominal five volts
and a ground through hard wired circuits from the
OCM. The OCM then monitors the pressure sensor
output voltage on the Programmable Communication
Interface (PCI) data bus circuit.
To properly diagnose the seat weight bladder and
pressure sensor, its communication with/between the
OCM, and all other components within the OCS, use
a scan tool and the appropriate diagnostic
information.
8O - 44 RESTRAINTSRS
SEAT WEIGHT BLADDER & PRESSURE SENSOR (Continued)

Component Page
Ignition Coil......................... 8W-30
Ignition Switch....................... 8W-10
Impact Sensors....................... 8W-43
Inlet Air Temperature Sensor............ 8W-30
Instrument Cluster.................... 8W-40
Instrument Panel Switch
Bank.................. 8W-43, 44, 52, 53, 63
Integrated Power Module............... 8W-10
Knock Sensor........................ 8W-30
Lamp Assemblies...................... 8W-51
License Lamp..................... 8W-51, 61
Lift Pump Motor...................... 8W-30
Lift Pump Relay...................... 8W-30
Liftgate Ajar Switch................ 8W-39, 61
Liftgate Cinch/Release Motor............ 8W-61
Liftgate Flood Lamps.................. 8W-44
Liftgate Pinch Sensors................. 8W-61
Low Beam Lamps..................... 8W-50
Manifold Absolute Pressure Sensor........ 8W-30
Mass Air Flow Sensor.................. 8W-30
Memory Seat/Mirror/Adjustable Pedals
Module...................... 8W-56, 62, 63
Memory Set Switch.................... 8W-63
Message Center.................... 8W-40, 46
Mode Door Actuator................... 8W-42
Multi-Function Switch............ 8W-50, 52, 53
Natural Vacuum Leak Detection Assembly . . 8W-30
Occupant Classification Module.......... 8W-43
Occupant Restraint Controller........... 8W-43
Overhead Console..................... 8W-49
Oxygen Sensors....................... 8W-30
Park Assist Display.................... 8W-56
Park Assist Module.................... 8W-56
Park Assist Sensors.................... 8W-56
Park Lamp Relay..................... 8W-10
Park Lamps.......................... 8W-50
Park/Turn Signal Lamps................ 8W-50
Parking Brake Switch.................. 8W-40
Power Folding Mirror Switch............ 8W-62
Power Liftgate Module................. 8W-61
Power Liftgate Motor.................. 8W-61
Power Mirror Switch................... 8W-62
Power Mirrors........................ 8W-62
Power Outlets........................ 8W-41
Power Seat Circuit Breaker.............. 8W-10
Power Seat Motors.................... 8W-63
Power Seat Position Sensors............. 8W-63
Power Seat Switches................... 8W-63
Power Window Circuit Breaker........... 8W-10
Power Window Motors.................. 8W-60
Power Window Switches................ 8W-60
Powertrain Control Module........... 8W-30, 31
PTCs............................... 8W-10
Radiator Fan Relaies................... 8W-42Component Page
Radiator Fans........................ 8W-42
Radio............................... 8W-47
Reading Lamps....................... 8W-44
Rear A/C-Heater Unit.................. 8W-42
Rear Auto Temp Control Switch.......... 8W-42
Rear Blower Control Switches............ 8W-42
Rear Blower Motor Power Module......... 8W-42
Rear Dome Lamp..................... 8W-44
Rear Intrusion Sensor.................. 8W-39
Rear Mode Motor..................... 8W-42
Rear Temperature Motor................ 8W-42
Rear View Mirror................ 8W-49, 55, 62
Rear Window Defogger Grid............. 8W-48
Rear Wiper Motor..................... 8W-53
Recirculation Door Actuator............. 8W-42
Remote Radio Switches................. 8W-47
Repeater Lamps...................... 8W-52
Seat Belt Switches.................... 8W-43
Seat Belt Tensioners................... 8W-43
Seat Weight Sensor.................... 8W-43
Sentry Key Remote Entry Module......... 8W-39
Siren............................... 8W-39
Sliding Door Control Modules............ 8W-61
Sliding Door Latch Sensing Switches...... 8W-61
Sliding Door Lock Motors............... 8W-61
Sliding Door Motors................... 8W-61
Speakers............................ 8W-47
Speed Control Servo................... 8W-33
Speed Control Switches................. 8W-33
Speed Sensors........................ 8W-31
Splices.............................. 8W-70
Starter Motor........................ 8W-21
Starter Motor Relay................... 8W-21
Sunroof Module....................... 8W-64
Sunroof Switch....................... 8W-64
Thatcham Alarm Indicator.............. 8W-39
Thatcham Alarm Module................ 8W-39
Throttle Position Sensor................ 8W-30
Traction Control Switch................. 8W-35
Trailer Tow Connector.................. 8W-54
Transmission Control Module............ 8W-31
Transmission Control Relay............. 8W-31
Transmission Range Sensor.............. 8W-31
Transmission Solenoid/Pressure Switch
Assembly.......................... 8W-31
Turn Signal Lamps.................... 8W-52
Vehicle Speed Sensor................... 8W-30
Vent Motors.......................... 8W-60
Visor/Vanity Lamps.................... 8W-44
Washer Fluid Level Switch.............. 8W-53
Washer Pump Motor................... 8W-53
Water In Fuel Sensor.................. 8W-30
Wheel Speed Sensors................... 8W-35
Wiper Module........................ 8W-53
8W - 02 - 2 8W-02 COMPONENT INDEXRS

8W-43 OCCUPANT RESTRAINT SYSTEM
Component Page
Belt Tension Sensor.................. 8W-43-8
Clockspring........................ 8W-43-4
Driver Airbag Squib 1................ 8W-43-4
Driver Airbag Squib 2................ 8W-43-4
Driver Knee Blocker Airbag Squib....... 8W-43-4
Driver Seat Belt Switch............... 8W-43-3
Driver Seat Belt Tensioner............. 8W-43-3
Front Control Module............... 8W-43-2, 8
G200.............................. 8W-43-2
G201.............................. 8W-43-2
G301.............................. 8W-43-8
Instrument Cluster................... 8W-43-2
Instrument Panel Switch Bank......... 8W-43-2
Integrated Power Module............ 8W-43-2, 8
Left Curtain Airbag Squib............. 8W-43-6
Left Front Impact Sensor.............. 8W-43-6Component Page
Left Side Impact Sensor 1............. 8W-43-6
Left Side Impact Sensor 2............. 8W-43-6
Left Side Impact Sensor 3............. 8W-43-6
Occupant Classification Module....... 8W-43-2, 8
Occupant Restraint
Controller............ 8W-43-2, 3, 4, 5, 6, 7, 8
Passenger Airbag.................... 8W-43-5
Passenger Airbag On/Off Indicator Lamp . . 8W-43-2
Passenger Seat Belt Switch............ 8W-43-5
Passenger Seat Belt Tensioner.......... 8W-43-5
Passenger Seat Weight Sensor.......... 8W-43-8
Right Curtain Airbag Squib............ 8W-43-7
Right Front Impact Sensor............. 8W-43-7
Right Side Impact Sensor 1............ 8W-43-7
Right Side Impact Sensor 2............ 8W-43-7
Right Side Impact Sensor 3............ 8W-43-7
RS8W-43 OCCUPANT RESTRAINT SYSTEM8W-43-1

Component Page
Left Sliding Door Motor (Power Sliding
Door).......................... 8W-80-96
Left Speed Control Switch............ 8W-80-96
Left Turn Signal Lamp (Export)........ 8W-80-96
Left Visor/Vanity Lamp (Premium/Luxury
Except Export)................... 8W-80-97
License Lamp (Manual Release)........ 8W-80-97
License Lamp (Power Liftgate)......... 8W-80-97
License Lamp (Power Release)......... 8W-80-97
Lift Pump Motor (Diesel)............. 8W-80-98
Liftgate Ajar Switch (Manual Release) . . . 8W-80-98
Liftgate Ajar Switch (Power Release).... 8W-80-98
Liftgate Cinch/Release Motor (Power
Liftgate)........................ 8W-80-98
Liftgate Left Pinch Sensor (Power
Liftgate)........................ 8W-80-99
Liftgate Right Pinch Sensor (Power
Liftgate)........................ 8W-80-99
Manifold ABSolute Pressure Sensor
(Gas)........................... 8W-80-99
Mass Air Flow Sensor (Diesel)......... 8W-80-99
Memory Seat/Mirror/Adjustable
Pedals Module C1................ 8W-80-100
Memory Seat/Mirror/Adjustable
Pedals Module C2................ 8W-80-100
Memory Seat/Mirror/Adjustable
Pedals Module C3................ 8W-80-101
Memory Seat/Mirror/Adjustable
Pedals Module C4................ 8W-80-101
Memory Set Switch................. 8W-80-101
Message Center (Export)............ 8W-80-101
Mode Door Actuator................ 8W-80-102
Multi-Function Switch.............. 8W-80-102
Natural Vacuum Leak Detection Assembly
(Except Export).................. 8W-80-102
Occupant Classification Module....... 8W-80-102
Occupant Restraint Controller C1..... 8W-80-103
Occupant Restraint Controller C2..... 8W-80-104
Output Speed Sensor............... 8W-80-104
Overhead Console (Except Base)...... 8W-80-105
Oxygen Sensor 1/1 Upstream (Gas).... 8W-80-105
Oxygen Sensor 1/2 Downstream (Gas) . . 8W-80-105
Park Assist Display................ 8W-80-105
Park Assist Module................. 8W-80-106
Park Assist Sensor No. 1............ 8W-80-106
Park Assist Sensor No. 2............ 8W-80-106
Park Assist Sensor No. 3............ 8W-80-107
Park Assist Sensor No. 4............ 8W-80-107
Passenger Airbag.................. 8W-80-107
Passenger Airbag On/Off Indicator
Lamp......................... 8W-80-107
Passenger Blend Door Actuator....... 8W-80-107
Passenger Door Courtesy Lamp
(Luxury/Export)................. 8W-80-108
Passenger Door Lock Switch.......... 8W-80-108Component Page
Passenger Folding Mirror Relay
(Export)....................... 8W-80-108
Passenger Heated Seat Back......... 8W-80-108
Passenger Heated Seat Cushion....... 8W-80-109
Passenger Heated Seat Module (Except
Export)........................ 8W-80-109
Passenger Heated Seat Module C1
(Export)....................... 8W-80-109
Passenger Heated Seat Module C2
(Export)....................... 8W-80-109
Passenger Heated Seat Module C3
(Export)........................ 8W-80-110
Passenger Power Seat Front Riser
Motor......................... 8W-80-110
Passenger Power Seat
Horizontal Motor................ 8W-80-110
Passenger Power Seat
Rear Riser Motor................ 8W-80-110
Passenger Power Seat Recliner Motor . . . 8W-80-111
Passenger Power Seat Switch......... 8W-80-111
Passenger Power Window Motor....... 8W-80-111
Passenger Power Window Switch...... 8W-80-111
Passenger Seat Belt Switch (Occupant
Sensing)....................... 8W-80-112
Passenger Seat Belt Tensioner........ 8W-80-112
Passenger Seat Weight Sensor........ 8W-80-112
Power Folding Mirror Switch (Export) . . 8W-80-113
Power Liftgate Module C1........... 8W-80-113
Power Liftgate Module C2........... 8W-80-113
Power Liftgate Motor............... 8W-80-114
Power Mirror Switch................ 8W-80-114
Power Outlet (Except Lowline)........ 8W-80-114
Power Seat Circuit Breaker (30A)...... 8W-80-115
Power Window Circuit Breaker (25A) . . . 8W-80-115
Power Window Switch (LHD Lowline) . . 8W-80-115
Powertrain Control Module C1........ 8W-80-116
Powertrain Control Module C2........ 8W-80-117
Powertrain Control Module C3........ 8W-80-118
Powertrain Control Module C4........ 8W-80-119
Radiator Fan No. 1 (Diesel).......... 8W-80-120
Radiator Fan No. 1 (Gas)............ 8W-80-120
Radiator Fan No. 2 (Diesel).......... 8W-80-120
Radiator Fan No. 2 (Gas)............ 8W-80-120
Radiator Fan Relay (Gas)............ 8W-80-121
Radiator Fan Relay No. 1 (Diesel)..... 8W-80-121
Radiator Fan Relay No. 2 (Diesel)..... 8W-80-121
Radiator Fan Relay No. 3 (Diesel)..... 8W-80-122
Radio C1......................... 8W-80-122
Radio C2 (CD Changer)............. 8W-80-123
Radio C2 (DVD/CD Changer)......... 8W-80-123
Radio C2 (Hands Free).............. 8W-80-123
Rear A/C-Heater Unit (3 Zone MTC) . . . 8W-80-124
Rear Auto Temp Control Switch (3 Zone
ATC) .......................... 8W-80-124
8W - 80 - 4 8W-80 CONNECTOR PIN-OUTSRS

PASSENGER SEAT BELT SWITCH (OCCUPANT SENSING) - YELLOW 2 WAY
CAV CIRCUIT FUNCTION
1 R58 16LB/GY PASSENGER SEAT BELT SWITCH SENSE
2 R60 16LB/TN PASSENGER SEAT BELT SWITCH GROUND
PASSENGER SEAT BELT TENSIONER-2WAY
CAV CIRCUIT FUNCTION
1 R56 18LB/DG (EXCEPT EXPORT) PASSENGER SEAT BELT TENSIONER LINE 1
1 R54 18LB/YL (EXPORT) PASSENGER SEAT BELT TENSIONER LINE 2
2 R54 18LB/YL (EXCEPT EXPORT) PASSENGER SEAT BELT TENSIONER LINE 2
2 R56 18LB/DG (EXPORT) PASSENGER SEAT BELT TENSIONER LINE 1
PASSENGER SEAT WEIGHT SENSOR - BLACK 3 WAY
CAV CIRCUIT FUNCTION
A R941 20LG/DG PASSENGER BLADDER PRESSURE SENSOR GROUND
B R741 20LG/VT PASSENGER BLADDER PRESSURE SENSOR SIGNAL
C R740 20LG/OR PASSENGER BLADDER PRESSURE SENSOR POWER
8W - 80 - 112 8W-80 CONNECTOR PIN-OUTSRS

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Passenger Door Courtesy Lamp GY At Lamp 44
Passenger Door Lock Switch BK At Switch 44
Passenger Folding Mirror Relay
(Export)BL Left Kick Panel 7
Passenger Heated Seat Back GN At Seat N/S
Passenger Heated Seat Cushion BK At Seat N/S
Passenger Heated Seat Module GY At Heated Seat N/S
Passenger Power Seat Front
Riser MotorRD Under Seat N/S
Passenger Power Seat Horizontal
MotorBK Under Seat N/S
Passenger Power Seat Rear
Riser MotorRD Under Seat N/S
Passenger Power Seat Recliner
MotorGN Under Seat N/S
Passenger Power Seat Switch GN At Switch N/S
Passenger Power Window Motor RD At Motor 44
Passenger Power Window Switch BK At Switch 44
Passenger Seat Belt Switch
(Occupant Sensing)YL On Seat Harness N/S
Passenger Seat Belt Tensioner On Seat Harness N/S
Passenger Seat Weight Sensor BK Passenger Seat N/S
Power Folding Mirror Switch
(Export)BK Near Steering Column 31
Power Liftgate Module C1 BK Left Quarter 46, 47
Power Liftgate Module C2 Left Quarter 46, 47
Power Liftgate Motor BK Left Quarter 47
Power Mirror Switch BK Rear of Switch 30
Power Outlet (Except Lowline) BK Instrument Panel 20, 23, 25
Power Seat Circuit Breaker GY Under Seat N/S
Powertrain Control Module C1 BK Left Front Engine Compartment 11
Powertrain Control Module C2 OR Left Front Engine Compartment 11
Powertrain Control Module C3 NAT Left Front Engine Compartment 11
Powertrain Control Module C4 GN Left Front Engine Compartment 11
Power Window Circuit Breaker GY Left Side Kick Panel 41 42
Radiator Fan No.1 (Gas) BK Left Side At Motor 1
Radiator Fan No.1 (Diesel) GY Left Side At Motor 1
Radiator Fan No.2 (Gas) BK Right Side At Motor 1, 2
Radiator Fan No.2 (Diesel) GY Right Side At Motor 1, 2
Radiator Fan Relay (Gas) Top of Left Front Frame Rail 1
Radiator Fan Relay No. 1
(Diesel)BL Left Front Engine Compartment 2
Radiator Fan Relay No. 2
(Diesel)BL Left Front Engine Compartment 2
RS8W-91 CONNECTOR/GROUND/SPLICE LOCATION8W-91-9
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

SPLICE NUMBER LOCATION FIG.
S355 In T/O for C307 N/S
S356 (Export) In Floor Pan Track Wiring 37
S356 (Except Export) Near T/O for Passenger Heated Seat Back N/S
S359 Left Quarter Panel 47
S361 Near T/O for C304 N/S
S362 Near T/O for C304 N/S
S363 Near T/O for C331 N/S
S364 (RHD) Near T/O for Passenger Power Window Window 44
S365 (LHD) Near T/O for Driver Power Window Window N/S
S366 In Passenger Power Heated Seat Wiring Assembly N/S
S367 Near T/O for C301 37
S368 (Diesel) Near T/O for C101 35, 36
S370 (Except Export) In T/O for Integrated Power Module C6 7
S371 In T/O to Power Window Switch N/S
S372 Near T/O for Data Link Connector 41
S373 (Except Export In Floor Pan Track Wiring 37
S374 Near T/O for Body Control Module N/S
S376 (Highline Audio) In Floor Pan Track Wiring 34
S378 Near T/O for C301 35, 36, 37
S380 (Highline Audio) Right Quarter Panel 48
S381 (Highline Audio) Right Quarter Panel 48
S382 (Passenger Heated
Seat)Near T/O for Passenger Seat Weight Sensor N/S
S383 (Parktronics) Rear Fascia N/S
S384 (Parktronics) Rear Fascia N/S
8W - 91 - 16 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONRS
CONNECTOR/GROUND/SPLICE LOCATION (Continued)