battery DODGE NEON 1997 1.G Wiring Diagrams Owner's Manual

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114
2
3
SENSOR OXYGEN
HEATED
UPSTREAM DOWNSTREAM
SENSOR OXYGEN
HEATED
K141
20
TN/WT
4C160
K141
20
TN/WT
DG/OR18 A142
K41
20
BK/DG
K4
20
BK/LBK4
20
BK/LB
S118
Z1
18
BKZ1
18
BK
S119
S110
1Z1
18
BK
S107
Z1
20
BK
Z1
18
BK
G101
DG/OR18 A142
22
S122
DG/OR18 A142
C1616
DG/OR18 A142
5857
60RELAY DOWN
SHUT
AUTOMATIC
BATT A0
CENTER DISTRIBUTION
POWER
21
20A
FUSE
21
C161POWERTRAIN
CONTROL
MODULE
30C2
UPSTREAM
HEATED
OXYGEN
SENSOR
SIGNAL SIGNALSENSOR OXYGENHEATED DOWNSTREAM
C151
Z1
18
BKC143
GROUNDSENSOR
MODULE
CONTROL
POWERTRAIN
BK/LB20 K4
BK/LB18 K4
K4
20
BK/LB
S120
6C2
ASD
RELAY
OUTPUT
A142
18
DG/OR
S127
K4
20
BK/LB
10C161
21
SENSOR IMMOBILIZER BATTERY
TEMPERATURE
SENSOR
K4
20
BK/LBK4
18
BK/LB
(8W-70-2)
(8W-15-2)
(8W-15-2)(8W-10-4)
(8W-10-10) (8W-10-4)
(8W-10-10)
(8W-30-2)
(8W-70-2) (8W-30-13)
(8W-30-7)
PL-RHD8W-30 FUEL/IGNITION SYSTEM 8W - 30 - 3
PLR03002978W-1

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CRANKSHAFT
POSITION
SENSOR
8V
SUPPLYSENSOR
GROUND
K7
20
0R
K7
20
0R
1
32
8V
SUPPLY
SENSOR
GROUNDCAMSHAFT
POSITION
SENSOR
CAMSHAFT
POSITION
SENSOR
SIGNAL
S123
K24
20
GY/BKK4
20
BK/LB
K4
18
BK/LB
S118
K4
20
BK/LB
BATTERY
TEMPERATURE
SENSOR
K4
20
BK/LB
C14352C1
AMBIENT
TEMPERATURE
SENSOR
SIGNAL SENSOR
GROUNDG31
18
VT/LG
C24
CLUSTER INSTRUMENT
G20
22
VT/YL
G20
VT/YL20
7C103
6C160
A
BC
20
VT/YLG20
S120
C2
2632C2 C233
K44
20
TN/YL
SENSOR TEMPERATURE
COOLANT
ENGINE
CRANKSHAFT
POSITION
SENSOR
SIGNALCAMSHAFT
POSITION
SENSOR
SIGNALENGINE
COOLANT
TEMPERATURE
SENSOR
SIGNAL
K4
20
BK/LBK4
20
BK/RD
SOHC DOHC
DOHC SOHC
TN/BK20 K2TN/DB20 K2
CRANKSHAFT
POSITION
SENSOR
SIGNAL
MODULE CONTROL
POWERTRAIN
2
1
BK/LB20 K4
C16010
BK/LB20 K4
BK/LB18 K4
S110
(8W-30-13)
(8W-70-2)(8W-40-6)
(8W-70-2)
(8W-30-3)
PL-RHD8W-30 FUEL/IGNITION SYSTEM 8W - 30 - 7
PLR03006978W-1

Downloaded from www.Manualslib.com manuals search engine 8W-30 FUEL/IGNITION SYSTEMS
INDEX
page page
DESCRIPTION AND OPERATION
AUTOMATIC SHUT DOWN RELAY.......... 15
BATTERY FEED........................ 14
BATTERY TEMPERATURE SENSOR......... 18
CAMSHAFT POSITION SENSOR........... 16
CRANKSHAFT POSITION SENSOR......... 16
DATA LINK CONNECTOR................. 15
DUTY CYCLE EVAP/PURGE SOLENOID...... 19
EGR TRANSDUCER (EET) SOLENOID....... 19
ENGINE COOLANT
TEMPERATURE SENSOR............... 16
FUEL INJECTORS....................... 18
FUEL PUMP MOTOR.................... 15
HEATED OXYGEN SENSORS.............. 16
IDLE AIR CONTROL MOTOR.............. 18
IGNITION COIL PACK.................... 18IGNITION SWITCH...................... 14
INTAKE AIR TEMPERATURE SENSOR....... 17
KNOCK SENSOR....................... 17
LOW FUEL DETECT INPUT............... 19
MANIFOLD ABSOLUTE
PRESSURE SENSOR.................. 17
PARK/NEUTRAL POSITION SWITCH INPUT
(3±SPD TRANSMISSION)................ 19
POWER (DEVICE) GROUND............... 14
POWER STEERING PRESSURE SWITCH..... 19
SIGNAL GROUND....................... 14
THROTTLE POSITION SENSOR............ 17
TORQUE CONVERTER CLUTCH SOLENOID
(TCC)............................... 19
VEHICLE SPEED SENSOR................ 15
DESCRIPTION AND OPERATION
IGNITION SWITCH
In the RUN position, the ignition switch connects
circuit A1 from the Power Distribution Center (PDC)
to circuit A21. A 30 amp fuse in the PDC protects cir-
cuits A1 and A21. Circuit A21 feeds a bus bar in the
fuse block. The bus bar feeds circuits G5, F12, and
F15.
²Circuit G5 powers the gauge cluster warning
lamps and the daytime running lamp (DRL) module.
Fuse cavity 11 (5 amp) in the fuse block protects cir-
cuit G5.
²Circuit F12 splices to the Powertrain Control
Module (PCM), duty cycle purge solenoid, EGR sole-
noid, ABS system, and a bus bar in the PDC. The
bus bar in the PDC feeds the coil side of the radiator
fan relay, A/C compressor clutch relay, and the fuel
pump relay. A 15 amp fuse in the fuse block, cavity
10, protects circuit F12.
²Circuit F15 feeds the Airbag Control Module
(ACM). A 10 amp fuse in the fuse block, cavity 9, pro-
tects circuit F15.
BATTERY FEED
Circuit A14 from the Power Distribution Center
(PDC) supplies battery voltage to cavity 46 of the
Powertrain Control Module (PCM). A 20 amp fuse in
the PDC protects circuit A14.
HELPFUL INFORMATION
Circuit A14 connects to a bus bar in the PDC that
the battery feeds. Circuit A14 powers the AutomaticShut Down (ASD) relay and fuel pump relay. The
A14 circuit also splices to the data link connector.
POWER (DEVICE) GROUND
Circuit Z12 connects to cavities 10 and 50 of the
Powertrain Control Module (PCM). The Z12 circuit
provides ground for PCM internal drivers that oper-
ate high current devices like the injectors and igni-
tion coils.
Internal to the PCM, the power (device) ground cir-
cuit connects to the PCM sensor return circuit (from
circuit K4) and the signal ground circuit (Z11).
HELPFUL INFORMATION
Circuit Z12 which supplies ground for the PCM
high current drivers, has the same termination point
as circuit Z11. The termination point is the left side
of the radiator closure panel.
If the system loses ground for the ganged circuits,
at the left side of the radiator closure panel, the vehi-
cle will not operate. Check the connection at the
ganged ground circuit eyelet.
SIGNAL GROUND
The signal ground circuit Z11 connects to cavity 47
of the PCM. The Z11 circuit provides ground for the
sensors that provide inputs to the PCM. Internal to
the PCM, the signal ground circuit connects to the
PCM sensor return circuit (from circuit K4) and the
power (device) ground circuit (Z12).
The termination point for circuit Z11 is an eyelet
attached to the left side of the radiator closure panel.
8W - 30 - 14 8W - 30 FUEL/IGNITION SYSTEMSPL

Downloaded from www.Manualslib.com manuals search engine HELPFUL INFORMATION
Circuit Z12 which supplies ground for the PCM
high current drivers, has the same termination point
as circuit Z11. The termination point is the left side
of the radiator closure panel.
If the system loses ground for the ganged circuits,
at the left side of the radiator closure panel, the vehi-
cle will not operate. Check the connection at the
ganged ground circuit eyelet.
DATA LINK CONNECTOR
Circuit A14 supplies battery voltage to the univer-
sal data link connector. Circuit A14 originates in the
Power Distribution Center (PDC) and connects to a
battery fed bus bar. A 20 amp fuse protects circuit
A14.
A twisted pair of wires, circuits D1 and D2, from
the Airbag Control Module (ACM) connect to the uni-
versal data link connector.
Ground circuit Z12 splices to two cavities of the
data link connector. The Z12 circuit also connects to
cavities 10 and 50 of the PCM connector.
Circuit D20 connects to cavity 75 of the PCM and
to the universal data link connector. Circuit D20 is
the SCI receive circuit for the PCM.
Circuit D21 connects to cavity 65 of the PCM and
to the universal data link connector. Circuit D21 is
the SCI transmit circuit for the PCM. The D21 cir-
cuit splices to the ABS module.
HELPFUL INFORMATION
The grounding point for circuit Z12 is the left side
of the radiator closure panel.
Circuit Z12 also supplies ground for the PCM high
current drivers and has the same termination point
as circuit Z11.
If the system loses ground for the ganged circuits
at the left side radiator closure panel the vehicle will
not operate. Check the connection at the ganged
ground circuit eyelet.
AUTOMATIC SHUT DOWN RELAY
The Automatic Shut Down (ASD) relay is located
in the Power Distribution Center (PDC). Power for
the coil and contact side of the relay is supplied on
circuit A14. This circuit is HOT at all times and pro-
tected by a 20 amp fuse located in the PDC.
The Powertrain Control Module (PCM) controls the
ground path for the coil side of the relay on circuit
K51. This circuit connects to cavity 67 of the PCM.
When the PCM supplies the ground path on circuit
K51 the contacts in the relay CLOSE connecting cir-
cuits A14 and A142. The A142 circuit is spliced and
supplies power to the generator, fuel injectors, PCM,
ignition coil, and heated oxygen sensors.
HELPFUL INFORMATION
²Refer to group 14 Fuel System, for additional
information.
²Check the 20 amp fuse located in the PDC.
FUEL PUMP MOTOR
Circuit A14 is a bus bar in the Power Distribution
Center (PDC) and connects to battery voltage. The
contact side of the fuel pump relay connects circuit
A14 and circuit A141. A 20 amp fuse in the PDC pro-
tects circuits A14 and A142.
Circuit A141 supplies voltage for the fuel pump
motor. Circuit Z1 provides ground for the fuel pump
motor. The grounding point for circuit Z1 is the right
rear wheel house.
Circuit F12 supplies voltage to the coil side of the
fuel pump relay. The Powertrain Control Module
(PCM) controls the ground path circuit for the coil
side of the fuel pump relay on circuit K31. Circuit
K31 connects to cavity 74 of the PCM.
HELPFUL INFORMATION
Circuit F12 originates in the fuse block where it
connects to a bus bar fed by circuit A21. In the
START and RUN position, the ignition switch con-
nects circuit A1 from the PDC to circuit A21. A 30
amp fuse in the PDC protects circuits A1 and A21.
Circuit F12 splices to feed the ABS control module,
EGR solenoid, Torque Converter Clutch (TCC) sole-
noid, leak detection pump, and the EVAP/Purge sole-
noid.
Circuit F12 also connects to a bus bar in the PDC.
The bus bar supplies voltage to the coil side of radi-
ator fan relay and A/C clutch relay, as well as the
fuel pump relay.
VEHICLE SPEED SENSOR
Circuit K7 supplies 8 volts from the Powertrain
Control Module (PCM) to the Vehicle Speed Sensor
(VSS). The K7 circuit connects to cavity 44 of the
PCM connector.
Circuit G7 from the VSS provides an input signal
to the PCM. The G7 circuit connects to cavity 66 of
the PCM connector.
The PCM provides ground for the VSS signal (cir-
cuit G7) through circuit K4. Circuit K4 connects to
cavity 43 of the PCM connector.
HELPFUL INFORMATION
Circuit G7 splices to the speedometer and odome-
ter in the instrument cluster.
Circuit K7 splices to supply 8 volts to the camshaft
position sensor and crankshaft position sensor.
Circuit K4 splices to supply ground for the signals
from the following:
²Upstream heated oxygen sensor
²Downstream heated oxygen sensor
PL8W - 30 FUEL/IGNITION SYSTEMS 8W - 30 - 15
DESCRIPTION AND OPERATION (Continued)

Downloaded from www.Manualslib.com manuals search engine ²Crankshaft position sensor
²Camshaft position sensor
²Battery temperature sensor
²Throttle position sensor
²Manifold absolute pressure sensor
²Engine coolant temperature sensor
²Knock sensor
²Intake air temperature sensor
HEATED OXYGEN SENSORS
Circuit A14 is a bus bar in the Power Distribution
Center (PDC), and connects to battery voltage. The
contact side of the Automatic Shut Down (ASD) relay
connects circuit A14 and circuit A142. A 20 amp fuse
in the PDC protects circuits A14 and A142.
Circuit A14 also supplies voltage to the coil side of
the ASD relay. The Powertrain Control Module
(PCM) controls the ground path circuit for the coil
side of the ASD relay on circuit K51. Circuit K51 con-
nects to cavity 67 of the PCM connector.
Circuit A142 splices to supply voltage for the
upstream and downstream heated oxygen sensors.
The A142 circuit also splices to cavity 6 of the
PCM. The input provided by circuit A142 at cavity 6
tells the PCM that the ASD relay energized.
Circuit K41 delivers the signal from the upstream
heated oxygen sensor to the PCM. Circuit K41 con-
nects to cavity 30 of the PCM connector.
Circuit K141 delivers the signal from the down-
stream heated oxygen sensor to the PCM. Circuit
K141 connects to cavity 51 of the PCM connector.
The PCM provides a ground for the upstream and
downstream heated oxygen sensor signals (circuit
K41 and K141) through circuit K4. Circuit K4 con-
nects to cavity 43 of the PCM connector.
Circuit Z1 provides ground for the heater circuits
in each sensor. Circuit Z1 terminates at the left side
of the radiator closure panel.
HELPFUL INFORMATION
Circuit A142 splices to supply voltage to the fuel
injectors, ignition coil, ASD relay, generator, and the
upstream and downstream heated oxygen sensors.
The PCM controls the ground circuit for each of the
components powered by circuit A142.
CRANKSHAFT POSITION SENSOR
Circuit K7 supplies 8 volts from the Powertrain
Control Module (PCM) to the crankshaft position
sensor. The K7 circuit connects to cavity 44 of the
PCM connector.
Circuit K24 from the sensor provides an input sig-
nal to the PCM. The K24 circuit connects to cavity 32
of the PCM connector.
The PCM provides ground for the crankshaft position
sensor signal (circuit K24) through circuit K4. Circuit
K4 connects to cavity 43 of the PCM connector.
HELPFUL INFORMATION
Circuit K7 splices to supply 8 volts to the camshaft
position sensor and vehicle speed sensor.
Circuit K4 splices to supply ground for the signals
from the following:
²Upstream heated oxygen sensor
²Downstream heated oxygen sensor
²Camshaft position sensor
²Battery temperature sensor
²Throttle position sensor
²Manifold absolute pressure sensor
²Engine coolant temperature sensor
²Knock sensor
²Intake air temperature sensor
²Vehicle speed sensor
CAMSHAFT POSITION SENSOR
Circuit K7 supplies 8 volts from the Powertrain
Control Module (PCM) to the camshaft position sen-
sor. The K7 circuit connects to cavity 44 of the PCM
connector.
Circuit K44 from the sensor provides an input sig-
nal to the PCM. The K44 circuit connects to cavity 33
of the PCM connector.
The PCM provides ground for the camshaft posi-
tion sensor signal (circuit K44) through circuit K4.
Circuit K4 connects to cavity 43 of the PCM connec-
tor.
HELPFUL INFORMATION
Circuit K7 splices to supply 8 volts to the camshaft
position sensor and vehicle speed sensor.
Circuit K4 splices to supply ground for the signals
from the following:
²Upstream heated oxygen sensor
²Downstream heated oxygen sensor
²Crankshaft position sensor
²Battery temperature sensor
²Throttle position sensor
²Manifold absolute pressure sensor
²Engine coolant temperature sensor
²Knock sensor
²Intake air temperature sensor
²Vehicle speed sensor
ENGINE COOLANT TEMPERATURE SENSOR
The engine coolant temperature sensor provides an
input to the Powertrain Control Module (PCM) on
circuit K2. The sensor also operates the engine cool-
ant temperature gauge in the instrument cluster on
circuit G20. Refer to Section 8W-40 for coolant tem-
perature gauge circuit description.
From circuit K2 the engine coolant temperature
sensor draws up to 5 volts from the PCM. The sensor
is a variable resistor. As coolant temperature
changes, the resistance in the sensor changes causing
8W - 30 - 16 8W - 30 FUEL/IGNITION SYSTEMSPL
DESCRIPTION AND OPERATION (Continued)

Downloaded from www.Manualslib.com manuals search engine a change in current draw. The K2 circuit connects to
cavity 26 of the PCM connector.
The PCM provides ground for the engine coolant
temperature sensor signal (circuit K2) through circuit
K4. Circuit K4 connects to cavity 43 of the PCM con-
nector.
HELPFUL INFORMATION
The engine coolant temperature sensor is case
grounded. The case ground provides the ground for
the coolant temperature gauge circuit G20.
Circuit K4 splices to supply ground for the signals
from the following:
²Upstream heated oxygen sensor
²Downstream heated oxygen sensor
²Camshaft position sensor
²Crankshaft position sensor
²Battery temperature sensor
²Throttle position sensor
²Manifold absolute pressure sensor
²Knock sensor
²Intake air temperature sensor
²Vehicle speed sensor
THROTTLE POSITION SENSOR
From the Powertrain Control Module (PCM), cir-
cuit K6 supplies 5 volts to the Throttle Position Sen-
sor (TPS). Circuit K6 connects to cavity 61 of the
PCM connector.
Circuit K22 delivers the TPS signal to the PCM.
Circuit K22 connects to cavity 35 of the PCM connec-
tor.
The PCM provides ground for the TPS signal (cir-
cuit K22) through circuit K4. Circuit K4 connects to
cavity 43 of the PCM connector.
HELPFUL INFORMATION
Refer to Group 14 for TPS operation.
Circuit K6 splices to supply 5 volts to the Manifold
Absolute Pressure (MAP) sensor.
Circuit K4 splices to supply ground for the signals
from the following:
²Upstream heated oxygen sensor
²Downstream heated oxygen sensor
²Battery temperature sensor
²Camshaft position sensor
²Crankshaft position sensor
²Engine coolant temperature sensor
²Manifold absolute pressure sensor
²Knock sensor
²Intake air temperature sensor
²Vehicle speed sensor
MANIFOLD ABSOLUTE PRESSURE SENSOR
From the Powertrain Control Module (PCM), cir-
cuit K6 supplies 5 volts to the Manifold AbsolutePressure (MAP) sensor. Circuit K6 connects to cavity
61 of the PCM connector.
Circuit K1 delivers the MAP signal to the PCM. Cir-
cuit K1 connects to cavity 36 of the PCM connector.
The PCM provides ground for the MAP sensor sig-
nal (circuit K1) through circuit K4. Circuit K4 con-
nects to cavity 43 of the PCM connector.
HELPFUL INFORMATION
Refer to Group 14 for MAP sensor operation.
Circuit K6 splices to supply 5 volts to the Throttle
Position Sensor.
Circuit K4 splices to supply ground for the signals
from the following:
²Upstream heated oxygen sensor
²Downstream heated oxygen sensor
²Battery temperature sensor
²Camshaft position sensor
²Crankshaft position sensor
²Engine coolant temperature sensor
²Throttle position sensor
²Knock sensor
²Intake air temperature sensor
²Vehicle speed sensor
INTAKE AIR TEMPERATURE SENSOR
The intake air temperature sensor provides an
input to the Powertrain Control Module (PCM) on
circuit K21. Circuit K21 connects to cavity 37 of the
PCM connector.
From circuit K21 the intake air temperature sen-
sor draws voltage from the PCM. The sensor is a
variable resistor. As intake air temperature changes,
the resistance in the sensor changes causing a
change in current draw.
The PCM provides ground for the intake air temper-
ature sensor signal (circuit K21) through circuit K4. Cir-
cuit K4 connects to cavity 43 of the PCM connector.
HELPFUL INFORMATION
Circuit K4 splices to supply ground for the signals
from the following:
²Upstream heated oxygen sensor
²Downstream heated oxygen sensor
²Battery temperature sensor
²Camshaft position sensor
²Crankshaft position sensor
²Engine coolant temperature sensor
²Throttle position sensor
²Knock sensor
²Manifold absolute pressure sensor
²Vehicle speed sensor
KNOCK SENSOR
The knock sensor provides an input to the Power-
train Control Module (PCM) on circuit K42. Circuit
K42 connects to cavity 24 of the PCM connector.
PL8W - 30 FUEL/IGNITION SYSTEMS 8W - 30 - 17
DESCRIPTION AND OPERATION (Continued)

Downloaded from www.Manualslib.com manuals search engine The PCM provides ground for the knock sensor sig-
nal (circuit K42) through circuit K4. Circuit K4 con-
nects to cavity 43 of the PCM connector.
HELPFUL INFORMATION
Circuit K4 splices to supply ground for the signals
from the following:
²Upstream heated oxygen sensor
²Downstream heated oxygen sensor
²Battery temperature sensor
²Camshaft position sensor
²Crankshaft position sensor
²Engine coolant temperature sensor
²Throttle position sensor
²Intake air temperature sensor
²Manifold absolute pressure sensor
²Vehicle speed sensor
BATTERY TEMPERATURE SENSOR
From circuit G31 the battery temperature sensor
draws voltage from the Powertrain Control Module
(PCM). The sensor is a variable resistor. As battery
temperature changes, the resistance in the sensor
changes causing a change in current draw. Circuit
G31 connects to cavity 52 of the PCM connector.
The PCM provides ground for the battery tempera-
ture sensor signal (circuit G31) through circuit K4. Cir-
cuit K4 connects to cavity 43 of the PCM connector.
HELPFUL INFORMATION
Circuit K4 splices to supply ground for the signals
from the following:
²Upstream heated oxygen sensor
²Downstream heated oxygen sensor
²Camshaft position sensor
²Crankshaft position sensor
²Engine coolant temperature sensor
²Throttle position sensor
²Manifold absolute pressure sensor
²Knock sensor
²Intake air temperature sensor
²Vehicle speed sensor
FUEL INJECTORS
Circuit A14 is a bus bar in the Power Distribution
Center (PDC), and connects to battery voltage. The
contact side of the Automatic Shut Down (ASD) relay
connects circuit A14 and circuit A142. A 20 amp fuse
in the PDC protects circuits A14 and A142.
Circuit A14 also supplies voltage to the coil side of
the ASD relay. The Powertrain Control Module
(PCM) controls the ground circuit for the coil side of
the ASD relay on circuit K51. Circuit K51 connects to
cavity 67 of the PCM connector.
Circuit A142 supplies voltage for the fuel injectors.
The PCM controls the ground circuit of each injector.²Circuit K11 is the ground circuit for Injector #1.
Circuit K11 connects to cavity 13 of the PCM.
²Circuit K12 is the ground circuit for Injector #2.
Circuit K12 connects to cavity 17 of the PCM.
²Circuit K13 is the ground circuit for Injector #3.
Circuit K13 connects to cavity 7 of the PCM.
²Circuit K14 is the ground circuit for Injector #4.
Circuit K14 connects to cavity 16 of the PCM.
HELPFUL INFORMATION
Circuit A142 splices to supply voltage to the fuel
injectors, ignition coil, ASD relay, generator, and the
upstream and downstream heated oxygen sensors.
The PCM controls the ground circuit for each of the
components powered by circuit A142.
The injectors operate in sequence. Refer to Group
14 for system operation.
IGNITION COIL PACK
Circuit A14 is a bus bar in the Power Distribution
Center (PDC), and connects to battery voltage. The
contact side of the Automatic Shut Down (ASD) relay
connects circuit A14 and circuit A142. A 20 amp fuse
in the PDC protects circuits A14 and A142.
Circuit A14 also supplies voltage to the coil side of
the ASD relay. The Powertrain Control Module
(PCM) controls the ground path circuit for the coil
side of the ASD relay on circuit K51. Circuit K51 con-
nects to cavity 67 of the PCM connector.
Circuit A142 supplies voltage for the ignition coil
pack. The coil pack consists of two individual coils
molded together. The PCM controls the ground cir-
cuit of each coil.
²Circuit K19 is the ground circuit for the ignition
coil that fires spark plugs # 1 and # 4. Circuit K19
connects to cavity 2 of the PCM.
²Circuit K17 is the ground circuit for the ignition
coil that fires spark plugs #2 and # 3. Circuit K17
connects to cavity 3 of the PCM.
HELPFUL INFORMATION
Circuit A142 splices to supply voltage to the fuel
injectors, ignition coil, ASD relay, generator, upstream
heated oxygen sensor and downstream heated oxygen
sensor. The PCM controls the ground circuit for each of
the components powered by circuit A142.
IDLE AIR CONTROL MOTOR
The Powertrain Control Module (PCM) operates
the Idle Air Control (IAC) motor through 4 circuits -
K39, K40, K59, and K60. Each circuit connects to
separate cavities in the PCM connector.
²Circuit K39 connects to cavity 57 of the PCM
connector.
²Circuit K40 connects to cavity 48 of the PCM
connector.
8W - 30 - 18 8W - 30 FUEL/IGNITION SYSTEMSPL
DESCRIPTION AND OPERATION (Continued)

Downloaded from www.Manualslib.com manuals search engine ²Circuit K59 connects to cavity 58 of the PCM
connector.
²Circuit K60 connects to cavity 49 of the PCM
connector.
POWER STEERING PRESSURE SWITCH
The power steering pressure switch opens and
closes circuit K10 between the Powertrain Control
Module (PCM) and ground. Circuit K10 connects to
cavity 45 of the PCM connector.
Circuit Z12 provides ground for the power steering
pressure switch. The grounding point for circuit Z12
is the left side of the radiator closure panel.
TORQUE CONVERTER CLUTCH SOLENOID (TCC)
The Powertrain Control Module (PCM) operates
the TCC solenoid by providing a ground path on cir-
cuit K54. Circuit K54 connects to PCM cavity 79.
Circuit F12 supplies battery voltage to the TCC
solenoid. Circuit F12 connects to a bus bar in the
fuse block fed by circuit A21. A 15 amp fuse in the
fuse block, cavity 10, protects circuit F12. Circuit F12
connects to cavity 20 of the PCM connector.
HELPFUL INFORMATION
Circuit F12 splices to feed the ABS control module,
PCM, EGR solenoid, leak detection pump, and the
duty cycle EVAP/Purge solenoid. The F12 circuit also
connects to a bus bar in the PDC that supplies volt-
age to the coil side of radiator fan relay, A/C clutch
relay, and fuel pump relay.
In the RUN or START position, the ignition switch
connects circuit A1 from the fuse block and circuit
A21. Circuit A1 connects to battery voltage and is
protected by a 30 amp fuse in the PDC.
DUTY CYCLE EVAP/PURGE SOLENOID
Circuit F12 supplies battery voltage to the Duty
Cycle EVAP/Purge solenoid. The Powertrain Control
Module (PCM) switches ground path for the solenoid
ON and OFF through circuit K52.
Circuit F12 connects to a bus bar in the fuse block
fed by circuit A21. A 15 amp fuse in the fuse block,
cavity 10, protects circuit F12. Circuit F12 also con-
nects to cavity 20 of the PCM connector.
Circuit K52 connects to cavity 68 of the PCM, and
cavity 1 of the solenoid connector.
HELPFUL INFORMATION
Circuit F12 splices to feed the ABS control module,
PCM, EET solenoid, leak detection pump, and the
TCC solenoid. The F12 circuit also connects to a bus
bar in the PDC that supplies voltage to the coil side
of radiator fan relays, A/C clutch relay, and fuel
pump relay.
In the START or RUN position, the ignition switch
connects circuit A1 from the fuse block and circuitA21. Circuit A1 connects to battery voltage and is
protected by a 30 amp fuse in the PDC.
EGR TRANSDUCER (EET) SOLENOID
Circuit F12 supplies battery voltage to the EET
solenoid. The Powertrain Control Module (PCM)
switches ground path for the solenoid ON and OFF
through circuit K35.
Circuit F12 connects to a bus bar in the fuse block
fed by circuit A21. A 15 amp fuse in the fuse block,
cavity 10, protects circuit F12. Circuit F12 also con-
nects to cavity 20 of the PCM.
Circuit K35 connects to cavity 40 of the PCM con-
nector.
HELPFUL INFORMATION
Circuit F12 splices to feed the ABS control module,
PCM, Duty Cycle EVAP/Purge solenoid, leak detec-
tion pump, and the TCC solenoid. The F12 circuit
also connects to a bus bar in the PDC that supplies
voltage to the coil side of radiator fan relays, A/C
clutch relay, and fuel pump relay.
In the START or RUN position, the ignition switch
connects circuit A1 from the fuse block and circuit
A21. Circuit A1 connects to battery voltage and is
protected by a 30 amp fuse in the PDC.
LOW FUEL DETECT INPUT
Circuit G4 provides an input to the Powertrain Con-
trol Module (PCM) indicating fuel tank level. This cir-
cuit connects to cavity 23 of the PCM connector.
The G4 circuit is also used for the fuel gauge
located in the instrument cluster. For operation of
the fuel gauge, refer to section 8W-40.
PARK/NEUTRAL POSITION SWITCH INPUT (3±SPD
TRANSMISSION)
On vehicles equipped with the 3±spd automatic
transmission the park/neutral switch provides an
input to the Powertrain Control Module (PCM).
When CLOSED, the park/neutral position switch
provides a ground path on circuit T41 for the coil
side of the engine starter motor relay. The case
grounded switch provides ground for circuit T41.
Circuit A41 from the ignition switch provides bat-
tery voltage to the coil side of the relay.
Circuit T41 splices to cavity 76 of the PCM. The
park/neutral position switch provides an input to the
Powertrain Control Module (PCM).
HELPFUL INFORMATION
In the START position, the ignition switch connects
circuit A1 from the Power Distribution Center (PDC)
to circuit A41. A 30 amp fuse protects circuits A1 and
A41.
PL8W - 30 FUEL/IGNITION SYSTEMS 8W - 30 - 19
DESCRIPTION AND OPERATION (Continued)

Downloaded from www.Manualslib.com manuals search engine 8W-40 INSTRUMENT CLUSTER
INDEX
page page
DESCRIPTION AND OPERATION
AIRBAG WARNING LAMP.................. 8
ANTI-LOCK WARNING LAMP............... 9
BRAKE WARNING INDICATOR LAMP......... 8
CHARGE INDICATOR LAMP................ 8
ENGINE COOLANT TEMPERATURE GAUGE . . . 7
FUEL GAUGE........................... 7
HEADLAMP ON CHIME.................... 8
HELPFUL INFORMATION.................. 9
HIGH BEAM INDICATOR LAMP.............. 8
INSTRUMENT CLUSTER.................. 7KEY-IN CHIME.......................... 8
LOW FUEL LAMP........................ 8
LOW OIL PRESSURE LAMP................ 8
ODOMETER............................ 8
RIGHT AND LEFT TURN
SIGNAL INDICATORS................... 8
SEAT BELT WARNING INDICATOR........... 8
SERVICE ENGINE SOON LAMP............. 8
SPEEDOMETER......................... 7
TACHOMETER.......................... 7
DESCRIPTION AND OPERATION
INSTRUMENT CLUSTER
The Instrument Cluster, located on the right side
of the instrument panel, provides the operator with
gauges and warning lamps relating to vehicle opera-
tion. All gauges in the standard and optional cluster
are magnetic type and logic driven.
Battery voltage for the clusters warning lamps and
gauges is provided on the G5 circuit. This circuit con-
nects from the fuse block and is protected bya5amp
fuse located in cavity 11. The cluster is powered only
when the ignition switch is in the START or RUN
position. The cluster is also powered on initial driv-
er's door opening.
Illumination lamps, internal to the cluster, receive
battery voltage on the E2 circuit from the 4 amp fuse
located in cavity 12 of the fuse block. This circuit is
HOT only when the headlamp switch is in the ON
position. Grounding for the cluster is provided on the
Z3 circuit and terminates at the instrument panel
left center support.
The M1 circuit also feeds the cluster through a 10
amp fuse in the Power Distribution Center (PDC).
This fuse is HOT at all times and also used to power
the underhood lamp, and the interior lamps. The
fuse is also lifted OPEN during vehicle shipping to
reduce battery draw.
SPEEDOMETER
The speedometer and odometer receive their infor-
mation on the G7 circuit from the Vehicle Speed Sen-
sor (VSS) on manual and 3±spd automatic
transmission applications. The G7 circuit also pro-
vides a signal to the Powertrain Control Module
(PCM).Logic internal to the instrument cluster adjusts the
position of the gauge pointer to the correct vehicle
speed using the signal on the G7 circuit.
TACHOMETER
The tachometer is connected to the Powertrain
Control Module (PCM) on the G21 circuit. It uses
solid state circuity to decode the ignition pulses
received from the PCM to adjust the gauge pointer to
the proper position.
ENGINE COOLANT TEMPERATURE GAUGE
The temperature gauge is connected to the engine
coolant temperature sensor on the G20 circuit. The
engine coolant temperature sensor for the gauge is a
combination unit. One side of the unit is used for the
Powertrain Control Module (PCM) and the other side
for the cluster. The sending unit is case grounded to
the engine.
The logic driven gauge moves in response to the
measured resistance of the engine coolant tempera-
ture sending unit.
FUEL GAUGE
The fuel level gauge is connected to the fuel pump
module on the G4 circuit. The fuel pump module con-
tains the fuel pump and a variable resistor for the
gauge. Grounding for the fuel pump module is pro-
vided on the Z2 circuit and terminates at the left
rear wheel house.
The logic driven gauge moves in response to the
measured resistance of the fuel tank sending unit.
The fuel level sensor contains a variable resistor.
As the position of the float arm on the level sensor
changes, the resistor changes the current flow
through the fuel gauge circuit. A change in current
flow alters the magnetic field in the fuel gauge which
changes the pointer position.
PL8W - 40 INSTRUMENT CLUSTER 8W - 40 - 7

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)