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GENERAL INFORMATION
tested continuously; other circuits are tested only
under certain circumstances. The ACM provides
diagnostic information about the airbag system to
the technician through the DRBIII via the PCI bus.
The deceleration of g-forces resulting from the
impact of a front-end collision causes the electronic
sensor inside of the ACM to be triggered. This
causes the inflators to be actuated, thus deploying
the airbag(s). The total time between determining
to deploy and deflation of the air bag is 1/10th of one
second (100ms).
The 2006 Jeep Wrangler (TJ) may be equipped
with a Passenger Airbag (PAB) On - Off Switch.
This switch has an ACM-controlled light that will
illuminate when the switch is in the Off position.
Use the test procedures in this manual to diag-
nose the cause of any customer complaint regarding
the Airbag Warning Indicator (located in the instru-
ment cluster), such as:
•
Airbag warning indicator does not illuminate at
any time
•
Airbag warning indicator is illuminated at all
times
3.1.1 PASSENGER AIRBAG ON-OFF
SWITCH
Vehicles without rear seats will be equipped with
a Passenger Airbag (PAB) On - Off Switch. The PAB
On - Off Switch allows the vehicle operator to turn
the passenger airbag function On or Off.
The Off indicator in the PAB On - Off Switch will
be illuminated for 2 seconds whenever the ignition
is transitioned to the Run position as a bulb check.
The Off indicator will remain illuminated when the
PAB On - Off Switch is turned to the Off position.
The PAB On - Off Switch assembly is mounted in
the center of the instrument panel below the radio,
this allows the Off indicator to be visible to both
front seat occupants.
WARNING: TO AVOID PERSONAL INJURY OR
DEATH, ALWAYS CHECK THE PASSENGER
AIRBAG ON - OFF SWITCH POSITION BEFORE
DRIVING THE VEHICLE. A SWITCH IN THE
WRONG POSITION INCREASES THE RISK OF
SERIOUS INJURY OR DEATH IN A COLLISION.
To operate the Passenger Airbag On - Off Switch,
insert the ignition key into the PAB On - Off Switch
keyway, push the key in to release the internal
plunger, and rotate switch to the desired position.
The spring-loaded locking plunger prevents the
user from leaving the key in the switch. The key
will be automatically ejected from the switch when
inward force is not applied. The ignition key is the
only key or object that should ever be inserted into
the PAB On - Off Switch.
NOTE: Do not turn the Passenger Airbag On -
Off Switch while the ignition is in the Run
position.
The ACM continuously monitors the resistance of
the Passenger Airbag On - Off Switch circuits to
identify the switch position and to provide switch
circuit diagnostics.
•
ON Position: Passenger Airbag On - Off Switch
resistance = 175 to 190 ohms
•
OFF Position: Passenger Airbag On - Off Switch
resistance = 820 to 870 ohms
If the ACM detects that the PAB On - Off Switch
circuits are open, shorted to ground, or shorted to
battery voltage, it will set Active and Stored DTC's.
When a DTC is detected by the ACM, it will trans-
mit a PCI bus message to the Instrument Cluster to
illuminate the Airbag warning indicator. Whenever
the Airbag warning indicator is illuminated, the
ACM should be the first module to be interrogated.
If after replacing the ACM, any of the following
codes are active, the ACM must be re-configured to
match the vehicle equipment:
•
MODULE NOT CONFIGURED FOR PAB OFF
SWITCH
•
PASSENGER AIRBAG ON - OFF SWTCH CIR-
CUIT OPEN
•
PASSENGER AIRBAG ON - OFF SWTCH INDI-
CATOR CIRCUIT OPEN
To properly configure the ACM, using the
DRBIII , select Miscellaneous from the Airbag sys-
tem menu and follow instructions.
WARNING: IGNORING THE AIRBAG WARNING
INDICATOR IN THE INSTRUMENT CLUSTER
COULD MEAN THE PASSENGER AIRBAG ON - OFF
SWITCH
IS
NOT
PASSENGER AIRBAG MAY DEPLOY IF AN IMPACT
OCCURS. IF THE AIRBAG WARNING INDICATOR
ILLUMINATES, WHILE DRIVING, THE AIRBAG ON -
OFF SWITCH WILL REMAIN FUNCTIONAL FOR
THAT KEY CYCLE. IF THE AIRBAG WARNING
INDICATOR ILLUMINATES AGAIN AT THE NEXT
IGNITION ON AND STAYS ILLUMINATED FOR
MORE THAN 6 - 8 SECONDS, THE ACM WILL
DEFAULT TO PASSENGER AIRBAG ON. IF THE
AIRBAG WARNING INDICATOR BULB TEST OR IF
THE OFF INDICATOR DOES NOT ILLUMINATE
WITH THE SWITCH IN THE OFF POSITION THE
PASSENGER AIRBAG MAY DEPLOY IF AN IMPACT
OCCURS. FAILURE TO TAKE THE PROPER
PRECAUTIONS COULD RESULT IN ACCIDENTAL
AIRBAG DEPLOYMENT AND PERSONAL INJURY
OR DEATH.
2
FUNCTIONAL
AND
THE
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