Ignition coil DODGE NEON 1997 1.G Wiring Diagrams Workshop Manual
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Page 15 of 256
Downloaded from www.Manualslib.com manuals search engine 8W-02 COMPONENT INDEX
INDEX
page
SCHEMATICS AND DIAGRAMS........................................................... 1
DESCRIPTION AND OPERATION.......................................................... 3
Component Page
A/C Compressor Clutch.................8W-42
A/C Compressor Clutch Relay............8W-42
A/C Cycling Switch....................8W-42
A/C Heater Blower Motor................8W-42
A/C Heater Control Switch...............8W-42
A/C High Pressure Switch...............8W-42
A/C Low Pressure Switch................8W-42
ABS Hydraulic Modulator...............8W-35
ABS Pump Motor......................8W-35
ABS Pump Motor Relay.................8W-35
ABS Relay Box........................8W-35
ABS System Relay.....................8W-35
ABS Warning Lamp....................8W-35
Airbag Control Module..................8W-43
Airbag Impact Sensors..................8W-43
Airbag Warning Lamp..................8W-40
Antenna.............................8W-47
Anti-Lock Warning Lamp................8W-40
Ash Receiver Lamp....................8W-44
Automatic Shut Down Relay.............8W-30
Back-Up Lamp Switch..................8W-51
Back-Up Lamps.......................8W-51
Battery..............................8W-20
Battery Temperature Sensor.............8W-30
Blower Motor Resistor Block.............8W-42
Brake Warning Lamp...................8W-40
Brake Warning Lamp Switch.............8W-40
Camshaft Position (CMP) Sensor..........8W-30
Capacitor.........................8W-10, 20
Charge Indicator Lamp.................8W-40
Check Engine Lamp....................8W-40
Cigar Lighter Relay....................8W-41
Cigar Lighter/Power Outlet..............8W-41
Circuit Breaker.....................8W-11,62
Circuit Breaker (FB)...................8W-11
Clockspring..........................8W-41
Cluster Illumination Lamps..............8W-40
Clutch Pedal Position Switch..........8W-10, 21
Combination Flasher...................8W-52
Controller Anti-Lock Brake..............8W-35
Crankshaft Position (CKP) Sensor.........8W-30
Data Link Connector...................8W-30
Diode............................8W-15, 42
Dome Lamp..........................8W-44Component Page
Door Ajar Switches.....................8W-44
Door Jamb Switches....................8W-40
Door Lock Motors......................8W-61
Door Lock Switches....................8W-61
Door Speakers........................8W-47
Driver Side Airbag.....................8W-43
Duty Cycle Evap/Purge Solenoid..........8W-30
EGR Transducer Solenoid...............8W-30
Engine Coolant Temperature (ECT) Sensor . . 8W-30
Engine Coolant Temperature Gauge.......8W-40
Engine Oil Pressure Switch..............8W-40
Engine Starter Motor...................8W-21
Engine Starter Motor Relay..............8W-21
Fog Lamp Relay....................8W-50, 51
Fog Lamps........................8W-50, 51
Front Fog Lamp Switch.................8W-50
Fuel Gauge...........................8W-40
Fuel Injectors.........................8W-30
Fuel Pump Module.....................8W-30
Fuel Pump Relay......................8W-30
Fuse Block...........................8W-11
Fuses (FB)...........................8W-11
Fuses (PDC)..........................8W-10
Fusible Link.......................8W-20, 21
Generator............................8W-20
Glove Box Lamp And Switch.............8W-44
Ground Distribution....................8W-15
Headlamp Dimmer And Optical
Horn Switch........................8W-50
Headlamp Leveling Motors..............8W-50
Headlamp Leveling Switch...............8W-50
Headlamp Switch......................8W-50
Headlamps...........................8W-50
Heated Oxygen Sensors.................8W-30
High Beam Indicator Lamp..............8W-40
Horn Relay...........................8W-41
Horn Switches........................8W-41
Horns...............................8W-41
IAT/MAP Sensor......................8W-30
Idle Air Control (IAC) Motor.............8W-30
Ignition Coil Pack.....................8W-30
Ignition Switch........................8W-10
Immobilizer Engine Sensor..............8W-30
Immobilizer Sensor....................8W-30
PL8W - 02 COMPONENT INDEX 8W - 02 - 1
Page 19 of 256
Downloaded from www.Manualslib.com manuals search engine 8W-10 POWER DISTRIBUTION
INDEX
page
SCHEMATICS AND DIAGRAMS........................................................... 1
DESCRIPTION AND OPERATION......................................................... 13
Component Page
A/C Compressor Clutch..................8W-10-9
A/C Compressor Clutch Relay.............8W-10-9
ABS Relay Box........................8W-10-7
Automatic Shut Down Relay.............8W-10-10
Battery.............................8W-10-4
Capacitor...........................8W-10-10
Circuit Breaker.......................8W-10-6
Clutch Pedal Position Switch.............8W-10-12
Data Link Connector...................8W-10-10
Dome Lamp..........................8W-10-8
Downstream Heated Oxygen Sensor........8W-10-10
Engine Starter Motor...................8W-10-5
Engine Starter Motor Relay............8W-10-5, 12
Engine Starter Motor Relay...............8W-10-5
Fog Lamp Relay......................8W-10-11
Fuel Injector No. 1....................8W-10-10
Fuel Injector No. 2....................8W-10-10
Fuel Injector No. 3....................8W-10-10
Fuel Injector No. 4....................8W-10-10
Fuel Pump Module....................8W-10-10
Fuel Pump Relay.....................8W-10-10
Fuse 1 (FB)..........................8W-10-6
Fuse 2 (PDC).......................8W-10-4, 5
Fuse 3 (PDC).......................8W-10-4, 6
Fuse 4 (FB)..........................8W-10-6
Fuse 5 (FB)..........................8W-10-6
Fuse 5 (PDC).......................8W-10-4, 7
Fuse 6 (FB)..........................8W-10-6
Fuse 7 (FB)..........................8W-10-6
Fuse 8 (FB)..........................8W-10-6
Fuse 8 (PDC).......................8W-10-4, 7
Fuse 10 (FB).........................8W-10-12
Fuse 10 (PDC)......................8W-10-4, 7
Fuse 11 (FB).........................8W-10-12
Fuse 11 (PDC)......................8W-10-4, 5
Fuse 12 (FB).........................8W-10-12
Fuse 13 (PDC)......................8W-10-4, 8
Fuse 14 (FB).........................8W-10-12
Fuse 15 (FB).........................8W-10-12
Fuse 16 (FB).........................8W-10-12
Fuse 16 (PDC)......................8W-10-4, 11
Fuse 18 (PDC)......................8W-10-4, 9
Fuse 20 (PDC)......................8W-10-4, 9
Fuse 21 (PDC)......................8W-10-4, 10
Component Page
Fuse 23 (PDC)......................8W-10-4, 10
Fuse 25 (PDC)......................8W-10-4, 9
Fuse Block........................8W-10-6, 12
G204...............................8W-10-5
Generator...........................8W-10-10
Glove Box Lamp And Switch..............8W-10-8
Headlamp Switch......................8W-10-6
Horn No. 1...........................8W-10-9
Horn No. 2...........................8W-10-9
Horn Relay..........................8W-10-9
Ignition Coil Pack.....................8W-10-10
Ignition Switch...................8W-10-5, 6, 12
Instrument Cluster...................8W-10-5, 8
Left Fog Lamp.......................8W-10-11
Left Visor/Vanity Lamps.................8W-10-8
Map/Reading Lamps....................8W-10-8
Noise Supressor......................8W-10-10
Power Distribution Center...............8W-10-10
Power Distribution Center . . 8W-10-4, 5, 6, 7, 8, 9, 10, 11
Powertrain Control Module..............8W-10-10
Radiator Fan Motor....................8W-10-7
Radio...............................8W-10-8
Rear Fog Lamp Switch.................8W-10-11
Rear Window Defogger Switch.............8W-10-7
Right Fog Lamp......................8W-10-11
Right Visor/Vanity Lamps................8W-10-8
S105..............................8W-10-10
S115 ..............................8W-10-11
S121..............................8W-10-10
S122..............................8W-10-10
S131...............................8W-10-9
S134..............................8W-10-10
S202...............................8W-10-5
S203...............................8W-10-8
S208...............................8W-10-5
S213...............................8W-10-6
S217...............................8W-10-6
S309...............................8W-10-8
Solid State Fan Relay...................8W-10-7
Stop Lamp Switch.....................8W-10-9
Trunk Lamp..........................8W-10-8
Turn Signal/Hazard Switch...............8W-10-9
Underhood Lamp......................8W-10-8
Upstream Heated Oxygen Sensor..........8W-10-10
8W - 10 - 2 8W - 10 POWER DISTRIBUTIONPL
Page 28 of 256
Downloaded from www.Manualslib.com manuals search engine 21FUSE20A
21
52
55
60
57
BATT A0
POWER
DISTRIBUTION
CENTER
72
C14616
A14
16
RD/WT
A14
16
RD/WT
POWERTRAIN
CONTROL
MODULE
A14
18
RD/WT
6C105
A141
16
DG/WT
A141
18
DG/WT
4
FUEL
PUMP
MODULE
A142
18
DG/OR
S105
22
FUEL
PUMP
RELAYAUTOMATIC
SHUT
DOWN
RELAY
CONNECTORLINK DATA
6C161
DG/OR18 A142
GENERATOR
A142
18
DG/OR
SENSOR OXYGEN
HEATED
DOWNSTREAM
A142
18
DG/OR
POWERTRAIN
CONTROL
MODULE
SENSOR OXYGEN
HEATED
UPSTREAM
A142
18
DG/ORA142
18
DG/OR
A142
18
DG/OR
A142
18
DG/OR A142
18
DG/ORDG/OR18 A142
DG/OR18 A142 A142
18
DG/OR
IGNITION
COIL
PACKSUPRESSOR
NOISE
S134S121
S122
2
DG/OR18 A142
DG/OR14 A142
2222
1161C2
58
FUEL
INJECTOR
NO. 1 NO. 2INJECTOR
FUEL FUEL
INJECTOR
NO. 3FUEL
INJECTOR
NO. 4
CAPACITOR
(8W-30-2) (8W-30-10)(8W-10-4)
(8W-30-10)
(8W-30-2)(8W-10-4)
(8W-30-4)
(8W-20-2)
(8W-30-3)(8W-30-2)
(8W-30-3)
(8W-30-5) (8W-30-5) (8W-30-5) (8W-30-5) (8W-30-5)
(8W-30-5)
8W - 10 - 10 8W-10 POWER DISTRIBUTIONPL-RHD
978W-1PLR01009
Page 63 of 256
Downloaded from www.Manualslib.com manuals search engine 8W-21 STARTING SYSTEM
DESCRIPTION AND OPERATION
STARTING SYSTEM- MANUAL TRANSMISSION
The Power Distribution Center (PDC) supplies bat-
tery voltage to the engine starter motor solenoid
through circuit T40 when the coil side of the engine
starter motor relay energizes. Circut A1 supplies the
battery voltage for the contact side of the relay. Cir-
cuit A1 and circuit T40 are protected by a 30 amp
fuse and feeds the contact side of the engine starter
motor relay. Both the 30 amp fuse and the engine
starter motor relay are located in the PDC.
The ignition switch supplies battery voltage to the
coil side of the engine starter motor relay on circuit
A41 when the key is moved to the START position
and the operator has pressed the clutch pedal to
CLOSE the clutch pedal position switch. Circuit Z1
supplies the ground for the coil side of the engine
starter motor relay. When the coil side of the relay
energizes, the contacts CLOSE, supplying battery
voltage to the engine starter motor solenoid.
Circuit A0 (battery positive cable) supplies battery
voltage to the motor of the starter when the solenoid
energizes.
HELPFUL INFORMATION
²Check for blown engine starter motor fuse in the
PDC.
²Move ignition key to the START position and
with the clutch pedal pressed, listen for starter motor
relay to click. The engine starter motor relay is
located in the PDC.
²Check for a good ground at starter motor.
²The left headlamp ground is the end point for
the starter relay coil ground circuit and is located at
the left side of the radiator closure panel.
STARTING SYSTEM (AUTOMATIC TRANSMISSION)
The Power Distribution Center (PDC) supplies bat-
tery voltage to the engine starter motor solenoid
through circuit T40 when the coil side of the engine
starter motor relay energizes. Circuit A1 supplies
battery voltage to the contact side of the relay. Cir-
cuit A1 and circuit T40 are protected by a 30 amp
fuse and feeds the contact side of the engine starter
motor relay. Both the 30 amp fuse and the engine
starter motor relay are located in the PDC.
The ignition switch supplies battery voltage to the
coil side of the engine starter motor relay on circuit
A41 when the key is moved to the START position
and the park/neutral portion of the park/neutral posi-
tion switch (3 speed transmission) is CLOSED.
Ground for the coil side of the engine starter motor
relay is supplied by circuit T41.Circuit A0 (battery positive cable) supplies battery
voltage to the motor of the engine starter when the
solenoid energizes.
HELPFUL INFORMATION
²Check for blown engine starter motor fuse in the
PDC.
²With the gear selector in the Park or Neutral
position, move ignition key to the START position
and listen for engine starter motor relay to click. The
engine starter motor relay is located in the PDC.
²Check for a good ground at engine starter motor.
PL8W - 21 STARTING SYSTEM 8W - 21 - 3
Page 65 of 256
Downloaded from www.Manualslib.com manuals search engine 8W-30 FUEL/IGNITION SYSTEMS
INDEX
page
SCHEMATICS AND DIAGRAMS........................................................... 1
DESCRIPTION AND OPERATION......................................................... 14
Component Page
A/C Compressor Clutch Relay..........8W-30-11
A/C High Pressure Switch.............8W-30-11
Airbag Control Module................8W-30-4
Automatic Shut Down Relay..........8W-30-2, 3
Battery Temperature Sensor..........8W-30-3, 7
Camshaft Position Sensor...........8W-30-7, 13
Controller Anti-Lock Brake..........8W-30-4, 12
Crankshaft Position Sensor..........8W-30-7, 13
Data Link Connector................8W-30-2, 4
Downstream Heated Oxygen Sensor......8W-30-3
Duty Cycle Evap/Purge Solenoid.........8W-30-9
EGR Transducer Solenoid..............8W-30-9
Engine Coolant Temperature Sensor......8W-30-7
Fuel Injector No. 1...................8W-30-5
Fuel Injector No. 2...................8W-30-5
Fuel Injector No. 3...................8W-30-5
Fuel Injector No. 4...................8W-30-5
Fuel Pump Module..................8W-30-10
Fuel Pump Relay....................8W-30-10
Fuse 5 (FB)........................8W-30-12
Fuse 10 (FB).....................8W-30-9, 10
Fuse 10 (FB)........................8W-30-9
Fuse 21 (PDC)................8W-30-2, 3, 4, 10
Fuse 25 (PDC)......................8W-30-12
Fuse Block....................8W-30-9, 10, 12
G101..............................8W-30-3
G102.........................8W-30-2, 4, 12
G106..............................8W-30-2
G303.............................8W-30-10
Generator.........................8W-30-11
IAT/MAP Sensor.....................8W-30-6
Idle Air Control Motor.................8W-30-8
Ignition Coil Pack....................8W-30-5
Immobilizer Engine Sensor............8W-30-13
Immobilizer Sensor..............8W-30-3, 8, 13
Instrument Cluster...........8W-30-7, 8, 10, 11Component Page
Knock Sensor.......................8W-30-6
Noise Supressor.....................8W-30-5
Park/Neutral Position Switch..........8W-30-12
Power Distribution Center....8W-30-2, 3, 4, 10, 12
Power Steering Pressure Switch.........8W-30-4
Powertrain Control
Module . 8W-30-2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
S101.............................8W-30-12
S102..............................8W-30-4
S104...........................8W-30-2, 12
S104............................8W-30-2, 4
S105............................8W-30-2, 4
S106.............................8W-30-12
S107..............................8W-30-3
S109...........................8W-30-9, 10
S110 ......................8W-30-3, 6, 7, 8, 13
S118 ..........................8W-30-3, 7, 8
S119 ..............................8W-30-3
S120........................8W-30-3, 6, 7, 8
S121..............................8W-30-5
S122..........................8W-30-2, 3, 5
S123.............................8W-30-13
S123............................8W-30-7, 8
S124..............................8W-30-6
S126..............................8W-30-9
S127..............................8W-30-3
S129.............................8W-30-13
S134..............................8W-30-5
S211 .............................8W-30-12
Solid State Fan Relay................8W-30-11
Stop Lamp Switch...................8W-30-12
Throttle Position Sensor...............8W-30-6
Torque Converter Clutch Solenoid........8W-30-9
Upstream Heated Oxygen Sensor........8W-30-3
Vapor Canister Leak Detector...........8W-30-9
Vehicle Speed Sensor...............8W-30-8, 13
8W - 30 - 2 8W - 30 FUEL/IGNITION SYSTEMSPL
Page 69 of 256
Downloaded from www.Manualslib.com manuals search engine 1
2
2
1
2
1
2
1
FUEL
INJECTOR
A142
18
DG/ORA142
18
DG/ORA142
18
DG/ORA142
18
DG/ORA142
18
DG/OR
S122
S121
A142
18
DG/OR
S134
A142
18
DG/OR
1
2
IGNITION
COIL
PACK
3
SUPRESSOR NOISE
A142
14
DG/OR
C21317C27C216C22C23C2
IGNITION
COIL
DRIVERK17
18
DB/TNK19
18
BK/GY
K11
18
WT/DBK12
18
TNK13
18
YL/WTK14
18
LB/BR
FUEL
INJECTOR
NO. 1
MODULE CONTROL
POWERTRAIN NO. 1NO. 2 INJECTOR
FUELNO. 3 INJECTOR
FUELNO. 4 INJECTOR
FUELDRIVER DRIVERNO. 2 INJECTORFUEL
DRIVERNO. 3 INJECTORFUEL
DRIVERNO. 4 INJECTORFUEL
DRIVERCOIL IGNITION(8W-10-10)
PL-RHD8W-30 FUEL/IGNITION SYSTEM 8W - 30 - 5
PLR03004978W-1
Page 78 of 256
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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
Page 79 of 256
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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)
Page 80 of 256
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)
Page 82 of 256
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)