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Downloaded from www.Manualslib.com manuals search engine except, the C5 circuit is used for the M1 speed and
circuit C6 is used for M2 speed operation.
Blower motor HIGH speed operation is accom-
plished on the C7 circuit which supplies battery volt-
age directly to the blower motor. There are no
resistors used in the HIGH speed mode.
HELPFUL INFORMATION
²Check the 30 amp fuse located in the PDC for
the radiator fan motor
²Check the 15 amp fuse located in cavity 10 of
the fuse block for the A/C compressor clutch relay
²Check the 10 amp fuse located in the PDC for
the A/C compressor clutch relay.
²Check the 25 amp fuse located in cavity 7 of the
fuse block for the blower motor.
²Check the right headlamp ground located at the
right fender side shield.
²Check the left headlamp ground located on the
left side of the radiator closure panel.
²On vehicles equipped with A/C check the refrig-
erant level. The system will not operate with a low
level of refrigerant.
PL8W - 42 AIR CONDITIONING-HEATER 8W - 42 - 7
DESCRIPTION AND OPERATION (Continued)
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Page 115 of 256
Downloaded from www.Manualslib.com manuals search engine 8W-43 AIRBAG SYSTEM
INDEX
page
SCHEMATICS AND DIAGRAMS........................................................... 1
DESCRIPTION AND OPERATION.......................................................... 5
Component Page
Airbag Control Module............8W-43-2, 3, 4
Airbag Warning Lamp.................8W-43-3
Data Link Connector..................8W-43-2
Driver Side Airbag...................8W-43-4
Fuse 12 (FB)........................8W-43-2
Fuse Block.........................8W-43-2Component Page
G202..............................8W-43-2
Instrument Cluster...................8W-43-3
Left Airbag Impact Sensor.............8W-43-3
Passenger Side Airbag.................8W-43-4
Right Airbag Impact Sensor............8W-43-3
8W - 43 - 2 8W - 43 AIRBAG SYSTEMPL
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Downloaded from www.Manualslib.com manuals search engine 17
FUSED
IGN.
(ST-RUN)
20
AIRBAG
CONTROL
MODULE
10A
FUSE
128FUSE10A
BLOCK
FUSE10
32 285
ST-RUN A21 RUN A22
311DATA
LINK
CONNECTOR
19 18
CCD
BUS
(-) (+) BUS CCD F25
18
TN/GN
F15
18
DB/WT
D1
20
VT/BR
D1
20
VT/BRD2
20
WT/BK
D2
20
WT/BK
11C10112
10 GROUND
Z6
18
BK/PK
G202
(RUN)IGN. FUSED
PAIR TWISTED
TWISTED
PAIR
(8W-11-9) (8W-11-8)(8W-11-2)
(8W-30-4)
(8W-15-5) (8W-10-6) (8W-10-12)
8W - 43 - 2 8W-43 AIRBAG SYSTEMPL-RHD
978W-1PLR04301
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Downloaded from www.Manualslib.com manuals search engine C19
CLUSTER INSTRUMENT
1FRONT
RIGHT
IMPACT
SENSOR SENSORIMPACTRIGHT FRONT
2
SENSOR IMPACT
AIRBAG
RIGHT LEFT
AIRBAG
IMPACT
SENSOR
2LEFT
RIGHT
IMPACT
SENSOR SENSORIMPACTRIGHTLEFT
1
3
LINE 1
LEFT
IMPACT
SENSORAIRBAG
WARNING
LAMP
DRIVER LINE 2
48
LINE 2
SENSORIMPACTRIGHTLINE 1
79
AIRBAG
CONTROL
MODULE
R47
18
DB/LB
R47
18
DB/LB
151678C101
R49
18
LB
R49
18
LB
R46
18
BR/LB
R46
18
BR/LB
R48
18
TN
R48
18
TNR41
18
BK/TN
SENSORIMPACTLEFT RIGHT
IMPACT
SENSOR
AIRBAG
WARNING
LAMP(8W-40-5)
(8W-40-5)
PL-RHD8W-43 AIRBAG SYSTEM 8W - 43 - 3
PLR04302978W-1
Page 118 of 256
Downloaded from www.Manualslib.com manuals search engine GROUND LINE 1 PASSENGER
AIRBAG
PRESSURE
SWITCHPASSENGER
AIRBAG
SQUIB
AIRBAG SIDE
PASSENGER
LINE 1 DRIVER
AIRBAG
SQUIB
AIRBAG SIDE
DRIVER
LINE 1
LINE 1AIRBAG
CONTROL
MODULE
PASSENGER
AIRBAG
SQUIBDRIVER
AIRBAG
SQUIB R51
18
VT/YL
R50
18
BR/YLR42
18
BR/YLR44
18
DG/YLR43
18
BK/LBR45
18
DG/LB
12115621
213421SWITCH PRESSUREAIRBAG PASSENGER
SENSESQUIB AIRBAG PASSENGER
LINE 2
SQUIB AIRBAG PASSENGERLINE 2
SENSE PASSENGER
AIRBAG
PRESSURE
SWITCH SWITCH PRESSUREAIRBAG PASSENGER
GROUNDSQUIB AIRBAG DRIVERLINE 2 SQUIB AIRBAG DRIVER
LINE 2
PAIR TWISTEDPAIR TWISTED
8W - 43 - 4 8W-43 AIRBAG SYSTEMPL-RHD
978W-1PLR04303
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Downloaded from www.Manualslib.com manuals search engine 8W-43 AIRBAG SYSTEM
DESCRIPTION AND OPERATION
AIRBAG CONTROL MODULE (ACM)
Two different circuits supply battery voltage from
the fuse block to the Airbag Control Module (ACM),
F15 and F25. The F15 and F25 circuits are connected
to separate bus bars internal to the fuse block. Dif-
ferent circuits from the Power Distribution Center
(PDC) and ignition switch supply battery voltage to
the fuse block bus bars.
The F25 circuit supplies battery voltage to the
ACM only when the ignition switch is in the RUN
position. The F15 circuit powers the ACM when the
ignition switch is in either the START or RUN posi-
tion.
An internal bus bar in the ignition switch connects
the A1 circuit from the PDC to the A21 circuit when
the switch is either the START or RUN position. The
A21 circuit supplies battery voltage to the bus bar in
the fuse block that feeds the F15 circuit. A 30 amp
fuse in the PDC protects the A1 and A21 circuits. A
10 amp fuse in the fuse block, cavity 9, protects the
F15 circuit.
When the ignition switch is in the RUN position, it
connects the A2 circuit from the PDC to the A22 cir-
cuit. The A22 circuit supplies battery voltage to the
fuse block bus bar that feeds the F25 circuit. A 40
amp fuse in the PDC protects the A2 and A22 cir-
cuits. A 10 amp fuse in the fuse block, cavity 5, pro-
tects the F25 circuit.
Circuits D1 and D2 are connected to the CCD Bus
and the ACM. The CCD bus is used to provide com-
munications between modules and the universal data
link connector.
The ACM has a case ground and an external dedi-
cated ground, circuit Z6. The dedicated ground con-
nects to the instrument panel right center support.
AIRBAG IMPACT SENSOR
The Airbag system uses a sensor internal to the
Airbag Control Module (ACM) to detect impact. For
information regarding operation of this sensor, refer
to the appropriate group of the Service Manual.
AIRBAG SQUIB (AIRBAG IGNITER)
DRIVERS SIDE AIRBAG
Two circuits, R43 and R45, connect the ACM to the
drivers side airbag module squib (igniter) after pass-
ing through the clock spring connector. Circuit R43
from cavity 3 of the ACM 4-way connector connects
to the squib. Circuit R45 from cavity 4 of the ACM
4-way connector connects to the squib. R43 and R45
are a twisted pair of wires.
PASSENGERS SIDE AIRBAG
Two circuits, R42 and R44, connect the ACM to the
passengers side airbag module squib (igniter). Circuit
R42 from cavity 1 of the ACM 4-way connector con-
nects to the squib. Circuit R44 from cavity 2 of the
ACM 4- way connector connects to the squib. R42
and R44 are a twisted pair of wires.
Circuits R50 and R51 are connected from the ACM
to the passangers airbag. These circuits are used to
monitor the pressure switch.
AIRBAG WARNING LAMP
The Airbag Warning lamp is used to alert the oper-
ator of a problem with the Airbag system. The lamp
is illuminated when the Airbag Control Module
(ACM) grounds the R41 circuit. Refer to the appro-
priate section of the Service Manual or Diagnostic
Test Procedures Manual to diagnosis this system.
HELPFUL INFORMATION
²Check for blown fuses in the circuit that connect
to the ignition switch and those that connect to the
ACM.
²While the bus bars in the fuse block power the
ACM, they also feed additional components on sepa-
rate fuse protected circuits.
²The ACM has a case ground and an external
dedicated ground. The dedicated ground connects to
the instrument panel right center support.
PL8W - 43 AIRBAG SYSTEM 8W - 43 - 5
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