DODGE NEON 1997 1.G Wiring Diagrams Workshop Manual

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FUSE
5
5 73
BATT A0
POWER
DISTRIBUTION
CENTER
1
2A16
14
GY
RELAY FAN
STATE
SOLID
C2
18
K173
20
DG
K173
20
LG
13C160
Z1
18
BK
S111
Z1
14
BK
Z1
14
BK
C25
14
LG
Z1
14
BK
G101
S108
POWERTRAIN
CONTROL
MODULE MOTOR FAN
RADIATOR
4
13
BR18 C20
DB/OR22 C21
A/C
HIGH
PRESSURE
SWITCH A/C
LOW
PRESSURE
SWITCH
C2
38
DB/OR20 C21
C2063
2
1
2
1
C1605
SENSE SWITCHA/C
BR/OR20 C20
DB/WT20 C22
DB/OR22 C21
1
2
A/C
CYCLING
SWITCH
RADIATOR
FAN
RELAY
CONTROLA/C
CYCLING
SWITCH
OUTPUT
2C101
(8W-10-7)(8W-10-4)
(8W-15-2)
(8W-15-2) (8W-15-2)
(8W-30-11) (8W-10-4)
(8W-42-4)
M
PL-RHD8W-42 AIR CONDITIONING-HEATER 8W - 42 - 5
PLR04204978W-1

Downloaded from www.Manualslib.com manuals search engine 8W-42 AIR CONDITIONING-HEATER
INDEX
page page
DESCRIPTION AND OPERATION
A/C OPERATION......................... 6
AIR CONDITIONING-HEATER SYSTEM....... 6BLOWER MOTOR OPERATION............. 6
HELPFUL INFORMATION.................. 7
RADIATOR FAN OPERATION............... 6
DESCRIPTION AND OPERATION
AIR CONDITIONING-HEATER SYSTEM
The A/C-Heater System is powered by a by several
fuses. Fuse 10, a 15 amp fuse located in the fuse
block, is HOT in the RUN position. This fuse powers
the coil side of the A/C compressor clutch relay
located in the Power Distribution Center (PDC).
A 30 amp fuse, on circuit A16 located in the PDC,
powers the solid state radiator fan relay. This fuse is
HOT at all times. The 10 amp fuse on circuit A17
located in the PDC powers the contact side of the A/C
compressor clutch relay.
The A/C-Heater blower motor is protected by a 25
amp fuse located in cavity 7 of the fuse block. This
fuse in HOT in the RUN position only. When the
ignition switch is in the RUN position, power is sup-
plied to the fuse on circuit A22. The power leaves the
fuse on circuit C1 and goes directly to the blower
motor.
There is a 4 amp fuse located in cavity 12 of the
fuse block used for the illumination lamps in the A/C-
Heater control. The fuse is HOT at all times.
A/C OPERATION
When the A/C or the defrost switch is put in the
ON position, and the A/C cycling switch, low pressure
cut-out switch, and the high pressure switch are
CLOSED, the Powertrain Control Module (PCM)
receives a request for A/C.
After receiving this input, the PCM activates the
A/C compressor by grounding the C28 circuit on the
coil side of the A/C Compressor Clutch relay. Power
for the coil side of the relay is supplied on the bus
bar located in the Power Distribution Center (PDC).
With the coil energized, current flows from the 10
amp fuse in the PDC on circuit A17 through the
CLOSED contacts in the relay, on the C3 circuit to
the A/C compressor clutch.
The A/C compressor clutch receives this voltage
and creates a magnetic field energizing the clutch.
Ground for the coil is provided at the right headlamp
ground.
The connector at the A/C compressor has a diode
located in it. This diode is used to control the inducedvoltage resulting from the magnetic field collapsing
when the clutch is disengaged. The diode provides a
path for the voltage to protect other components and
systems.
The A/C compressor clutch relay is also used by the
PCM to disengage the compressor in a Wide Open
Throttle (W.O.T.) condition.
RADIATOR FAN OPERATION
The radiator fan system used in this vehicle uses a
solid state relay that controls the speed of the radia-
tor fan.
Power for the relay is supplied on circuit A16 This
circuit is HOT at all times and protected by a 30 amp
fuse located in the Power Distribution Center (PDC).
Ground for the coil side of the relay is controlled by
the Powertrain Control Module (PCM). When the
PCM determines the need for fan operation the PCM
supplies the ground path for circuit K173. This cir-
cuit connects to cavity 18 of the PCM connector.
From the relay circuit C25 connects to the radiator
fan motor(s). On vehicles equipped with the manual
transmission only one radiator fan is used. For vehi-
cles equipped with an automatic transmission there
are two radiator fans used.
Ground for the radiator fans is supplied on circuit
Z1.
BLOWER MOTOR OPERATION
With the ignition switch in the RUN position,
power flows from the 25 amp fuse, in cavity 7 of the
fuse block, to the blower motor. Blower motor speed
is controlled by the fan control switch located in the
instrument panel, and the resistor block.
Blower motor LOW speed operation is accom-
plished on the C4 circuit. When the control switch is
moved to the LOW speed position, current is passed
on the C7 circuit through the blower motor resistor
to the C4 circuit. It then flows through the blower
motor switch to the Z8 circuit. The Z8 circuit termi-
nates at a grounding point on the instrument panel
left center support.
The operation of the blower motor M1 and M2
speed operations is the same as the LOW speed
8W - 42 - 6 8W - 42 AIR CONDITIONING-HEATERPL

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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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

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

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

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

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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