Chrysler Pacifica. Manual - part 2

CAUTION: Deployed Front Air Bags may or
may not have live pyrotechnic material
within the air bag inflator. Do not dispose of
Driver and Passenger Airbags unless you
are sure of complete deployment. Please
refer to the Hazardous Substance Control
System for Proper Disposal. Dispose of
deployed air bags in a manner consistent
with state, provincial, local, and federal
regulations. Use the following table to
identify the status of the Airbag Squib.

AIRBAG SQUIB STATUS

(1) Using a DRBIII

t read Airbag DTC’s If the following active codes are present:

ACTIVE DTC

CONDITIONS

SQUIB STATUS

Passenger Squib 1 open
Passenger Squib 2 open

Check the stored DTC’s AND IF the stored min-
utes for both are within 15 minutes of each other.

Both Passenger Squib 1
and 2 were used.

Passenger Squib 1 open
Passenger Squib 2 open

Check the stored DTC’s AND IF the stored min-
utes for Passenger Squib 2 open is GREATER
than the stored minutes for Passenger Squib 1 by
15 minutes or more.

Passenger Squib 1 was
used; Passenger Squib
2 is live.

Passenger Squib 1 open
Passenger Squib 2 open

Check the stored DTC’s AND IF the stored min-
utes for Passenger Squib 1 open is GREATER
than the stored minutes for Driver Squib 2 by 15
minutes or more.

Passenger Squib 1 is
live; Driver Squib 2
was used.

If Passenger Squib 1
open

AND IF Passenger Squib 2 open is NOT an ac-
tive code.

Passenger Squib 1 was
used; Passenger Squib
2 is live.

If Passenger Squib 2
open

AND IF Passenger Squib 1 open is NOT an ac-
tive code.

Passenger Squib 1 is
live; Passenger Squib 2
was used.

If neither of the following codes is an active code:

ACTIVE DTC

SQUIB STATUS

Passenger squib 1 open

Status of Airbag is
Unknown.

Passenger squib 2 open

3.2.4

DRIVER KNEE BLOCKER AIRBAG

The most visible part of the Driver Knee Blocker

Airbag is the knee blocker trim cover. The knee
blocker trim cover and airbag are mounted directly
to the instrument panel structure below the steer-
ing column. When supplied with the proper electri-
cal signal, the inflator discharges the gas directly
into the airbag. The airbag cannot be repaired, and
must be replaced if deployed or in any way dam-
aged.

WARNING: DO NOT ATTEMPT TO MODIFY
ANY PART OF YOUR ADVANCED AIRBAG
SYSTEM.

THE

AIRBAG

MAY

INFLATE

ACCIDENTALLY OR MAY NOT FUNCTION
PROPERLY IF MODIFICATIONS ARE MADE.
TAKE YOUR VEHICLE TO AN AUTHORIZED
DEALER

FOR

ANY

ADVANCED

AIRBAG

SYSTEM SERVICE. IF YOUR SEAT INCLUDING
YOUR TRIM COVER AND CUSHION NEEDS TO
BE SERVICED IN ANY WAY (INCLUDING
REMOVAL OR LOOSENING/TIGHTENING OF
SEAT

ATTACHMENT

BOLTS),

TAKE

THE

VEHICLE TO YOUR AUTHORIZED DEALER.
ONLY

MANUFACTURER APPROVED

SEAT

ACCESSORIES MAY BE USED. CONTACT
YOUR

AUTHORIZED

DEALER

NECESSARY TO

MODIFY AN ADVANCED

AIRBAG

SYSTEM

FOR

PERSONS

WITH

DISABILITIES.

GENERAL INFORMATION

WARNING: NEVER STRIKE OR KICK THE
AIRBAG CONTROL MODULE, AS IT CAN
DAMAGE THE IMPACT SENSOR OR AFFECT
ITS CALIBRATION. IF AN AIRBAG CONTROL
MODULE

ACCIDENTALLY

DROPPED

DURING SERVICE, THE MODULE MUST BE
SCRAPPED AND REPLACED WITH A NEW
UNIT. FAILURE TO TAKE THE PROPER
PRECAUTIONS

COULD

RESULT

ACCIDENTAL AIRBAG DEPLOYMENT AND
PERSONAL INJURY OR DEATH.

3.2.5

SEAT BELT TENSIONER (SBT)

The driver and passenger seat belt (buckle) ten-

sioners are mounted to the inboard side of the front
seats. The seat belt buckle and seat belt switch are
connected directly to the seat belt tensioner cable.
At the onset of an impact event the ORC uses the
seat belt tensioner to rapidly retract the seat belt
buckles. With the slack removed, the occupant’s
forward motion in an impact will be reduced as will
the likelihood of contacting interior components.
The seat belt tensioner cannot be repaired, if
damaged or defective it must be replaced. The ORC
continuously monitors the resistance of the seat
belt tensioner circuits for open and shorted condi-
tions.

3.2.6

FRONT AND SIDE IMPACT SENSOR

The front and side impact sensors are electronic

accelerometers that sense the rate of vehicle decel-
eration, and combined with the ORC Accelerometer
Sensor 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 Oc-
cupant Restraint Controller. The ORC micropro-
cessor continuously monitors all of the front and
side passive restraint system electrical circuits to
determine the system readiness. If the ORC de-
tects a system fault, it sets a Diagnostic Trouble
Code and controls the airbag indicator operation
accordingly. The impact sensors each receive bat-
tery current and ground through dedicated left and
right sensor signal and ground circuits from the
ORC. The impact sensors and the ORC communi-
cate by modulating the voltage in the sensor signal
circuit. If the sensor is dropped it must be replaced.

CAUTION: Do not remove or install the
impact

sensors

while

the

sensor

connected to the vehicle wiring.

3.2.7

OCCUPANT CLASSIFICATION
SYSTEM

A non-calibrated Occupant Classification Module

(OCM) is the only component of the Occupant
Classification System (OCS) that is available for
separate service replacement, as outlined in the
procedures that follow. The OCS components of the
passenger side front seat cushion including the
cushion frame, springs, pad, seat weight bladder
and pressure sensor, seat cushion foam and the
OCM are a factory-calibrated and assembled unit.
Once this unit is connected to a vehicle electrically,
the calibration settings are uploaded from the
OCM and stored in the memory of the Airbag
Control Module (ORC). If only the OCM is subse-
quently replaced, the new, non-calibrated OCM
learns the proper calibration settings from the
ORC after it is connected to the vehicle electrically.
If any of the remaining OCS components of the
passenger side, front seat cushion require replace-
ment, they are serviced only as a factory calibrated,
assembled, and tamper-evident service replace-
ment package. This package includes the assem-
bled frame, springs, pad, seat weight bladder and
pressure sensor, foam, wiring and a calibrated
OCM. When installing this package, always re-
place all of the existing components with the new
components as a unit. Do not attempt to separate
or disconnect any of the new OCS components
contained in the service replacement package from
each other, and do not attempt to reuse any of the
replaced components in this or any other vehicle.
Once any of the original factory-installed compo-
nents except the OCM have been replaced with the
service replacement package components, the
OCM can only be serviced by replacing the entire
passenger side front seat cushion unit with an-
other complete service replacement package.

CAUTION: On vehicles equipped with the
Occupant

Classification

System

(OCS),

never

replace

both

the Airbag

Control

Module

(ORC)

and

the

Occupant

Classification Module (OCM) at the same
time. If both require replacement, replace
one.

Then

perform

the

supplemental

restraint verification test before replacing
the other. Both the ORC and the OCM store
OCS calibration data, which they transfer to
one another when one of them is replaced. If
both are replaced at the same time, an
irreversible fault will be set in both modules.

The OCM is subsystem of the Airbag Control

Module (ORC). Therefore the OCM bus message
updates the ORC with the front passenger seat
information via PCI Bus message. The ORC then

GENERAL INFORMATION

controls the Passenger Off indicator and the Airbag
Warning Indicator to provide system onboard diag-
nostic feedback. All OCS wiring repairs are prohib-
ited; when wiring problems are diagnosed a Blad-
der Repair Kit is the only approved repair.

PASSENGER AIRBAG OFF INDICATOR

Vehicles equipped with the Occupant Classifica-

tion System (OCS) include a passenger airbag off
indicator located in the Switch Bank in the center
of the instrument panel. Vehicles without OCS
have a blank lens installed in the instrument
panel. At ignition on, for a system test, the ORC
low side driver grounds a yellow Light Emitting
Diode (LED) circuit causing the PASS AIRBAG
OFF Indicator text and icon to be illuminated.

SEAT WEIGHT SENSOR

Vehicles equipped with the Occupant Classifica-

tion System (OCS) have a seat weight bladder and
pressure sensor unit that is integral to the passen-
ger front seat cushion. The pressure sensor re-
ceives a nominal five volts and a ground through
dedicated hardwired circuits from the OCM. The
OCM then monitors the pressure sensor output
voltage.

SEAT BELT TENSION SENSOR - BTS

The Belt Tension Sensor (BTS) is designed to

measure belt tension as an input to a passenger
Occupant Classification System (OCS). It is used to
detect high cinch loads associated with child seats
and compensate for the seat cushion load to cor-
rectly classify occupant size. When a load is applied
to the seat belt, the belt tension sensor measures
the load. As the load changes, the circuitry of the
belt tension sensor changes the output voltage of
the sensor. The belt tension sensor receives a
nominal five volts and a ground through dedicated
hardwired circuits from the OCM. The OCM then
monitors the belt tension sensor output voltage on
a dedicated hardwired data communication circuit.
If the vehicle has experienced any impact(s) result-
ing in deployment of a pyrotechnic device of any
kind (airbag, seatbelt tensioner, side curtain, etc.)
within the vehicle, the entire passenger seat belt
retractor assembly, including the BTS, shall be
replaced. Additionally, if the seat belt webbing has
become cut, frayed, or worn; or if the stitching has
become damaged in any way, the entire passenger
seat belt retractor assembly, including the BTS,
shall be replaced. The belt tension sensor cannot be
repaired and, if faulty or damaged, the entire
passenger side front seat belt and retractor unit
must be replaced. The OCM Verification Test will
also provide a BTS Verification procedure to verify
the BTS function. This verification procedure re-
quires the Miller Special Tool #8828.

BLADDER REPAIR KIT

There are only three replaceable components in the

OCS, Occupant Classification Module, Bladder Re-
pair Kit and the Passenger Airbag OFF Indicator. The
Bladder repair kit contains the OCS bladder, wire
harnesses, pressure sensor (Seat Weight Sensor),
module, seat cushion and other related structural and
sound deadening components. The module and sensor
connector must have a Tamper Evident material
installed on the service kit module and sensor connec-
tors. This material provides visible evidence that the
assembly has been separated after the calibration
process was completed. Do not install a Bladder
Repair Kit if it appears that any of the components
have been disconnected. The OCM can be replaced if
the Airbag Control Module has uploaded the seat
calibration into memory in a previous ignition cycle
and the new OCM has a blank VIN and no calibration
data stored in memory.

NOTE: An OCM can only be replaced in a
passenger front seat if the seat is equipped
with the original OCS module, bladder, sensor
and wiring. NOTE: Servicing the OCS may
create additional active and stored trouble
codes that must be resolved before the
vehicle can be returned to the owner. The OCS
Verification Test will also set active DTCs if the
procedure is not completed successfully.

The Miller Special Tool, MRL-9077 and the

DRBIII

t are needed to successfully complete the

system Verification Test. The DRBIII

t may report

the following errors and failure messages during
the procedure.

NEW DRBIII

T FEATURES

ORC Menu
The DRBIII

t ORC System Test screen will display

the following:

VIN verification -- Original VIN and Current VIN

PCM Monitor - PCM Active On The Bus or PCM

Not Active On The Bus

The DRBIII

t ORC Input/Outputs screen will dis-

play the following:

OCM Status:

Seat Class 0 (Empty)
Seat Class 1 (Rear Facing Infant car Seat or RFIS)
Seat Class 2 (6 year old or Child)
Seat Class 3 (greater than or equal to 5th Percen-
tile Female)
Seat Class 4 (less than 5th Percentile Female)
Seat Class 5 (Undetermined)

The DRBIII

t ORC Miscellaneous screen will dis-

play the following:

Configure Airbag On-Off Switch

1. No Airbag On-Off Switch
2. Pass OCM Only

GENERAL INFORMATION

OCS Menu
The DRBIII

t OCM Input/Output screen will dis-

play the following:

OCS Status --- 90, 919, 929, 939, 949, 959

The DRBIII

t OCM Sensors screen will display the

following:

Bladder Output --- XXX A/D counts

Pas BTS Output --- XXX A/D counts

The DRBIII

t OCM OCS Info Monitor screen will

display the following:

Pass BTS -- Enabled or Disabled

System Verification
The DRBIII

t OCM System Test screen will display

the following

PCM Monitor - PCM Active On The Bus or PCM

Not Active On The Bus

Clear VIN Mismatch - Clear VIN Mismatch Com-

plete

VIN Verification - Original VIN and Current VIN

Clear VIN Mismatch

OCS Verification - OCS Verification

Test process errors:
Test In Progress
Mode 33 Not Supported
Subfunction not supported
Test Busy - Repeat Test
Conditions for Test Not Correct
Routine Already Running
Routine was Never Started
Press any key to continue, then restart the verifi-
cation test.

Test failed conditions:
Test Failed - Active DTCs Present
Test Failed - Seat is Empty
Test Failed - Seat Occupied
Test Failed - Weight Above Threshold
Test Failed - Weight Below Threshold
Test Failed - Temperature Out of Range
Test Failed - Seat Pressure Too High
Test Failed - Seat Pressure Too Low
Test Failed - Seat Pressure Not Stable
Test Failed - Temperature Out of Range
Test Failed - Seat Pressure Too Low
Test Failed - Power Up Time Too Short
Test Failed - Power Up Time Too Long
Test Failed - K Empty Count is 0
Test Failed - No EOL Calibration
Test Failed - K Allow is FF
Allow the vehicle seat and interior temperature to
stabilize, check voltage supplies and repair any
other active DTCs before restarting the System
Verification test.
The OCS has been Verified or The OCS has
NOT been Verified

WARNINGS:

WARNING: TO AVOID PERSONAL INJURY
OR

DEATH,

TURN

THE

IGNITION

OFF,

DISCONNECT THE BATTERY AND WAIT
TWO MINUTES BEFORE PROCEEDING.

WARNING: TO AVOID PERSONAL INJURY
OR DEATH, TURN THE IGNITION ON, THEN
RECONNECT THE BATTERY.

WARNING: TO AVOID PERSONAL INJURY
OR DEATH ON VEHICLES EQUIPPED WITH
THE OCCUPANT CLASSIFICATION SYSTEM
(OCS), ONLY THE OCCUPANT CLASSIFICA-
TION MODULE (OCM) AND THE PASSEN-
GER

SEAT

BLADDER

AND

CUSHION

SERVICE

KIT

ARE

THE

ONLY

PARTS

SERVICED.

WARNING: IF THE OCCUPANT CLASSIFICA-
TION MODULE IS DROPPED AT ANY TIME, IT
MUST BE REPLACED. FAILURE TO TAKE
THE PROPER PRECAUTIONS CAN RESULT
IN

ACCIDENTAL

AIRBAG

DEPLOYMENT

AND PERSONAL INJURY OR DEATH. TO
AVOID PERSONAL INJURY OR DEATH ON
VEHICLES

EQUIPPED

WITH

THE

OCCUPANT

CLASSIFICATION

SYSTEM

(OCS), ONLY THE OCCUPANT CLASSIFICA-
TION

MODULE

(OCM)

AND

THE

SEAT

CUSHION

TRIM

MAY

SERVICED

SEPARATELY. ALL OTHER COMPONENTS
OF THE PASSENGER SIDE FRONT SEAT
CUSHION ASSEMBLY MUST BE SERVICED
ONLY AS A COMPLETE FACTORY-CALIBRA-
TED, ASSEMBLED AND TAMPER-EVIDENT
SERVICE REPLACEMENT PACKAGE. THIS
PACKAGE

INCLUDES

THE

FRAME,

SPRINGS, PAD, BLADDER AND PRESSURE
SENSOR, FOAM, WIRING AND A CALIBRA-
TED

OCM.

WHEN

INSTALLING

THIS

PACKAGE ALWAYS REPLACE ALL OF THE
EXISTING COMPONENTS WITH THE NEW
COMPONENTS

UNIT.

NOT

ATTEMPT TO SEPARATE OR DISCONNECT
ANY OF THE NEW OCS COMPONENTS IN
THE SERVICE REPLACEMENT PACKAGE
FROM

EACH

OTHER,

AND

NOT

ATTEMPT

REUSE

ANY

THE

REPLACED COMPONENTS IN THIS OR ANY
OTHER VEHICLE. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN
FAILURE OF THE PASSENGER AIRBAG TO
DEPLOY

WHEN

REQUIRED,

PASSENGER AIRBAG DEPLOYMENT WHEN
NOT REQUIRED.

GENERAL INFORMATION

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