2000 DODGE NEON oxygen

OPERATION
The Automatic Shutdown (ASD) relay supplies bat-
tery voltage to the fuel injectors, electronic ignition
coil and the heating elements in the oxygen sensors.
A buss bar in the Power Distribution Center (PDC)
supplies voltage to the solenoid side and contact side
of the relay. The fuse also protects the power circuit
for the fuel pump relay and pump. The fuse is
located in the PDC. Refer to the Wiring Diagrams for
circuit information.
The PCM controls the ASD relay by switching the
ground path for the solenoid side of the relay on and
off. The PCM turns the ground path off when the
ignition switch is in the Off position. When the igni-
tion switch is in On or Start, the PCM monitors the
crankshaft and camshaft position sensor signals to
determine engine speed and ignition timing (coil
dwell). If the PCM does not receive crankshaft and
camshaft position sensor signals when the ignition
switch is in the Run position, it will de-energize the
ASD relay.
CRANKSHAFT POSITION SENSORÐPCM
INPUT
DESCRIPTION
The crankshaft position sensor mounts to the
engine block behind the generator, just above the oil
filter (Fig. 4).
The PCM uses the Crankshaft Position sensor to
calculate the following:
²Engine RPM²TDC number 1 and 4
²Ignition coil synchronization
²Injector synchronization
²Camshaft-to-crankshaft misalignment (Timing
belt skipped 1 tooth or more diagnostic trouble code).
OPERATION
The Crankshaft Position (CKP) sensor is a Hall-ef-
fect sensor. The second crankshaft counterweight has
two sets of four timing reference notches including a
60 degree signature notch (Fig. 5).
Fig. 5 Timing Reference Notches
1 ± MACHINED NOTCHES
2 ± CRANKSHAFT POSITION SENSOR
Fig. 4 Crankshaft Position Sensor
1 ± CRANKSHAFT POSITION SENSOR
2 ± OIL FILTER
3 ± GENERATOR
PLIGNITION SYSTEM 8D - 3
DESCRIPTION AND OPERATION (Continued)

8W-02 COMPONENT INDEX
Component Page
A/C Compressor Clutch Relay............8W-42
A/C Compressor Clutch.................8W-42
A/C Cycling Switch....................8W-42
A/C Heater Blower Motor...............8W-42
A/C Heater Control....................8W-42
A/C Pressure Switches..................8W-42
Airbag Control Module.................8W-43
Airbags.............................8W-43
Antenna.............................8W-47
Automatic Shut Down Relay.............8W-30
Back-Up Lamp Switch..................8W-51
Back-Up Lamps.......................8W-51
Battery.............................8W-20
Blower Motor Resistor Block.............8W-42
Brake Lamp Switch....................8W-30
Brake Shift Interlock Solenoid...........8W-30
Brake Warning Indicator Switch..........8W-40
Camshaft Position Sensor...............8W-30
Cargo Lamp..........................8W-44
Center High Mounted Stop Lamp.........8W-51
Center Stack Lamp....................8W-44
Cigar Lighter/Power Outlet..............8W-41
Circuit Breakers (FB)..................8W-11
City Lamps..........................8W-50
Clockspring.....................8W-33, 41, 43
Clutch Interlock Switch.................8W-30
Combination Flasher...................8W-52
Controller Anti-Lock Brake..............8W-35
Crankshaft Position Sensor..............8W-30
Data Link Connector...................8W-30
Decklid Release Switch.................8W-44
Decklid Solenoid......................8W-61
Diode No. 1..........................8W-42
Dome Lamp..........................8W-44
Dome Lamp/Intrusion Sensor............8W-44
Door Ajar Switches....................8W-40
Door Lock Motors.....................8W-61
Engine Coolant Temperature Sensor.......8W-30
Engine Oil Pressure Switch..............8W-30
Engine Starter Motor Relay.............8W-21
Engine Starter Motor..................8W-21
Fog Lamps........................8W-50, 51
Front Fog Lamp Switch.................8W-50
Fuel Injectors........................8W-30
Fuel Pump Module....................8W-30
Fuel Pump Relay......................8W-30
Fuel Tank...........................8W-30
Fuses (FB)...........................8W-11
Fuses (PDC).........................8W-10
Fuse Block...........................8W-11
Fusible Link A11...................8W-20, 21
Grounds.............................8W-15Component Page
Generator...........................8W-20
Glove Box Lamp/Switch.................8W-44
Headlamp Beam Select..............8W-40, 50
Headlamp Leveling Motors..............8W-50
Headlamp Leveling Switch Illumination....8W-50
Headlamp Leveling Switch..............8W-50
Headlamp Switch...................8W-50, 51
Headlamps..........................8W-50
Horns..............................8W-41
Horn Relay..........................8W-41
Horn Switch.........................8W-41
Hood Ajar Switch......................8W-39
Idle Air Control Motor..................8W-30
Ignition Coil.........................8W-30
Ignition Switch.......................8W-10
Indicators...........................8W-40
Indicator Drivers......................8W-40
Inlet Air Temperature Sensor............8W-30
Instrument Cluster....................8W-40
Instrument Panel Drivers...............8W-40
Knock Sensor.........................8W-30
Leak Detection Pump..................8W-30
License Lamps........................8W-51
Manifold Absolute Pressure Sensor........8W-30
Map/Reading Lamps...................8W-44
Multi- Function Switch.........8W-40, 50, 51, 52
Noise Suppressor......................8W-30
Oxygen Sensors.......................8W-30
Park Brake Switch....................8W-40
Park/Neutral Position Switch............8W-51
Park/Turn Signal Lamps................8W-52
Power Distribution Center...............8W-10
Power Mirror Switch...................8W-62
Power Steering Pressure Switch..........8W-30
Powertrain Control Module..............8W-30
PRNDL Lamp........................8W-44
Proportional Evap/Purge Solenoid.........8W-30
Radiator Fan Motor....................8W-42
Radiator Fan Relay....................8W-42
Radio...............................8W-47
Rear Window Defogger Switch...........8W-48
Rear Window Defogger.................8W-48
Remote Keyless Entry Module............8W-39
Repeater Lamps......................8W-52
Seat Belt Switch......................8W-40
Sentry Key Immobilizer Module..........8W-39
Side Marker Lamps....................8W-50
Siren...............................8W-39
Speakers............................8W-47
Splice Information.....................8W-70
Sunroof Control Module................8W-64
Sunroof Motor........................8W-64
PL8W - 02 COMPONENT INDEX 8W - 02 - 1

8W-10 POWER DISTRIBUTION
Component Page
A/C Compressor Clutch Relay........8W-10-7, 16
Automatic Shut Down Relay...........8W-10-16
Battery............................8W-10-7
Brake Lamp Switch................8W-10-7, 18
Cargo Lamp.......................8W-10-12
Center High Mounted Stop Lamp.......8W-10-18
Cigar Lighter/Power Outlet............8W-10-8
Circuit Breaker No. 1 (FB).............8W-10-9
Circuit Breaker No. 2 (FB).............8W-10-9
Combination Flasher.................8W-10-13
Controller Anti-Lock Brake.......8W-10-7, 11, 18
Data Link Connector.................8W-10-16
Dome Lamp.......................8W-10-12
Dome Lamp/Intrusion Sensor..........8W-10-12
Engine Starter Motor.................8W-10-8
Engine Starter Motor Relay........8W-10-7, 8, 10
Front Fog Lamp Switch..............8W-10-14
Fuel Injector No. 1..................8W-10-17
Fuel Injector No. 2..................8W-10-17
Fuel Injector No. 3..................8W-10-17
Fuel Injector No. 4..................8W-10-17
Fuel Pump Module..................8W-10-16
Fuel Pump Relay...................8W-10-16
Fuse 1 (FB)........................8W-10-10
Fuse 2 (FB)........................8W-10-10
Fuse 5 (PDC).......................8W-10-7
Fuse 6 (FB).........................8W-10-9
Fuse 6 (PDC).....................8W-10-7, 11
Fuse 7 (FB).........................8W-10-9
Fuse 8 (FB).........................8W-10-9
Fuse 8 (PDC).....................8W-10-7, 11
Fuse 9 (FB)........................8W-10-10
Fuse 9 (PDC)......................8W-10-7, 8
Fuse 10 (FB).......................8W-10-10
Fuse 10 (PDC)....................8W-10-7, 11
Fuse 11 (FB).......................8W-10-10
Fuse 12 (FB).......................8W-10-10
Fuse 13 (PDC)....................8W-10-7, 12
Fuse 14 (FB)........................8W-10-9
Fuse 14 (PDC).....................8W-10-7, 8
Fuse 15 (FB)........................8W-10-9
Fuse 15 (PDC)....................8W-10-7, 13
Fuse 16 (FB)........................8W-10-9Component Page
Fuse 18 (PDC)....................8W-10-7, 13
Fuse 20 (FB).......................8W-10-11
Fuse 20 (PDC)....................8W-10-7, 14
Fuse 21 (PDC)....................8W-10-7, 16
Fuse 22 (PDC)....................8W-10-7, 16
Fuse 23 (PDC)....................8W-10-7, 18
Fuse Block....................8W-10-9, 10, 11
Generator.........................8W-10-17
Glove Box Lamp/Switch..............8W-10-12
Headlamp Switch...................8W-10-14
High Note Horn....................8W-10-13
Horn Relay......................8W-10-7, 13
Ignition Coil.......................8W-10-17
Ignition Switch................8W-10-7, 8, 9, 10
Instrument Cluster.............8W-10-8, 12, 14
Instrument Panel Drivers.............8W-10-14
Left Front Fog Lamp..............8W-10-14, 15
Left Tail/Stop Lamp.................8W-10-18
Left Tail/Stop/Turn Signal Lamp........8W-10-19
Left Visor/Vanity Lamp...............8W-10-12
Low Note Horn.....................8W-10-13
Map/Reading Lamps.................8W-10-12
Multi-Function Switch......8W-10-7, 13, 14, 15, 19
Noise Suppressor...................8W-10-17
Oxygen Sensor 1/1 Upstream..........8W-10-17
Oxygen Sensor 1/2 Downstream........8W-10-17
Power Distribution Center.....8W-10-2, 3, 4, 7, 8,
9, 11, 12, 13, 14, 16, 18
Powertrain Control Module.........8W-10-16, 17
Radiator Fan Motor.................8W-10-11
Radiator Fan Relay................8W-10-7, 11
Radio.............................8W-10-12
Rear Window Defogger...............8W-10-11
Rear Window Defogger Switch.........8W-10-11
Remote Keyless Entry Module.........8W-10-12
Right Front Fog Lamp...............8W-10-15
Right Rear Fog Lamp................8W-10-14
Right Tail/Stop Lamp................8W-10-18
Right Tail/Stop/Turn Signal Lamp......8W-10-19
Right Visor/Vanity Lamp..............8W-10-12
Sentry Key Immobilizer Module........8W-10-12
Siren.............................8W-10-12
Underhood Lamp...................8W-10-12
PL8W - 10 POWER DISTRIBUTION 8W - 10 - 1

C101
FROM
B (8W-10-16)
UPSTREAM 1/1
SENSOR
OXYGEN OXYGEN
SENSOR
1/2
DOWNSTREAM
(2.0L)NO. 4 INJECTOR
FUEL
NO. 3 INJECTOR
FUEL FUEL
INJECTOR
NO. 2
NO. 1 INJECTOR
FUEL
1
12
S122
COIL
IGNITION
DG/OR18 A142A142
18
DG/OR A142
18
DG/OR
DG/OR18 A142
DG/OR18 A142DG/OR18 A142DG/OR18 A142DG/OR18 A142
GENERATOR
A142
18
DG/OR
A142
18
DG/OR
2
2 2
2
2DG/OR18 A142
6C1
POWERTRAIN
CONTROL
MODULE
S121
NOISE
SUPPRESSOR
A142
18
DG/OR
(8W-30-3) (8W-30-3)(8W-30-5)
(8W-30-5) (8W-30-5)
(8W-30-5)
(8W-30-5)(8W-20-2)(8W-30-2)
(8W-30-3)
(8W-30-5)
PL8W-10 POWER DISTRIBUTION 8W - 10 - 17
PLI01017008W-10

8W-15 GROUND DISTRIBUTION
Component Page
A/C Compressor Clutch................8W-15-5
A/C Compressor Clutch Relay...........8W-15-5
A/C Heater Control..................8W-15-10
Airbag Control Module................8W-15-8
Battery............................8W-15-8
Brake Lamp Switch..................8W-15-4
Brake Warning Indicator Switch........8W-15-3
Center High Mounted Stop Lamp....8W-15-12, 13
Center Stack Lamp..................8W-15-11
Cigar Lighter/Power Outlet............8W-15-11
Clockspring.........................8W-15-8
Clutch Interlock Switch...............8W-15-3
Controller Anti-Lock Brake.............8W-15-5
Data Link Connector.................8W-15-4
Decklid Solenoid.................8W-15-12, 13
Diode No. 1.........................8W-15-5
Dome Lamp/Intrusion Sensor..........8W-15-13
Driver Cylinder Lock Switch...........8W-15-9
Driver Door Lock Switch..............8W-15-9
Driver Power Mirror.................8W-15-10
Driver Power Window Switch........8W-15-9, 10
Fuel Pump Module..................8W-15-16
Fuel Tank.........................8W-15-16
G101............................8W-15-2, 3
G102..............................8W-15-4
G103............................8W-15-5, 7
G104..............................8W-15-8
G105..............................8W-15-8
G201..............................8W-15-8
G202..............................8W-15-8
G203...........................8W-15-9, 10
G204.............................8W-15-11
G301..........................8W-15-12, 13
G302..........................8W-15-14, 15
G303.............................8W-15-16
G304..........................8W-15-12, 13
Glove Box Lamp/Switch..............8W-15-11
Headlamp Leveling Switch............8W-15-11
High Note Horn...................8W-15-5, 6
Hood Ajar Switch....................8W-15-7
Instrument Cluster..................8W-15-11
Left Back-Up Lamp...............8W-15-12, 13
Left City Lamp......................8W-15-2
Left Front Fog Lamp.................8W-15-6
Left Front Side Marker Lamp..........8W-15-2
Left Front Turn Signal Lamp...........8W-15-2
Left Headlamp......................8W-15-2
Left Headlamp Leveling Motor..........8W-15-2
Left License Lamp..................8W-15-15Component Page
Left Park/Turn Signal Lamp............8W-15-2
Left Rear Fog Lamp.................8W-15-15
Left Rear Turn Signal Lamp...........8W-15-13
Left Repeater Lamp..................8W-15-2
Left Tail/Stop Lamp.................8W-15-13
Left Tail/Stop/Turn Signal Lamp........8W-15-12
License Lamp......................8W-15-14
Low Note Horn......................8W-15-5
Map/Reading Lamps.................8W-15-11
Multi-Function Switch...............8W-15-11
Oxygen Sensor 1/2 Downstream.........8W-15-3
Passenger Cylinder Lock Switch.........8W-15-9
Passenger Door Lock Switch............8W-15-9
Passenger Power Mirror...............8W-15-9
Passenger Power Window Switch........8W-15-9
Power Mirror Switch.................8W-15-10
Power Steering Pressure Switch.........8W-15-4
Powertrain Control Module............8W-15-4
PRNDL Lamp......................8W-15-11
Radiator Fan Motor..................8W-15-5
Radio.............................8W-15-8
Rear Window Defogger............8W-15-12, 13
Rear Window Defogger Switch..........8W-15-8
Remote Keyless Entry Module........8W-15-8, 11
Right Back-Up Lamp..............8W-15-14, 15
Right City Lamp.....................8W-15-7
Right Front Fog Lamp................8W-15-6
Right Front Side Marker Lamp.........8W-15-7
Right Front Turn Signal Lamp..........8W-15-7
Right Headlamp.....................8W-15-7
Right Headlamp Leveling Motor.........8W-15-7
Right License Lamp.................8W-15-15
Right Park/Turn Signal Lamp..........8W-15-7
Right Rear Fog Lamp................8W-15-15
Right Rear Turn Signal Lamp..........8W-15-15
Right Repeater Lamp.................8W-15-7
Right Tail/Stop Lamp................8W-15-15
Right Tail/Stop/Turn Signal Lamp......8W-15-14
Seat Belt Switch.................8W-15-12, 13
Sentry Key Immobilizer Module.........8W-15-8
Siren..............................8W-15-7
Sunroof Control Module..............8W-15-11
Traction Control Switch..............8W-15-11
Trunk Key Cylinder Switch.........8W-15-12, 13
Underhood Lamp....................8W-15-3
Vehicle Speed Control Servo............8W-15-3
Windshield Washer Pump..............8W-15-5
Wipe/Wash Switch...................8W-15-8
Wiper Motor.......................8W-15-11
PL8W - 15 GROUND DISTRIBUTION 8W - 15 - 1

4
22
B
2
S112
G101 (MTX) SWITCH
INTERLOCK
CLUTCH
SERVO CONTROL
SPEED
VEHICLE(2.0L) DOWNSTREAM
1/2
SENSOR
OXYGEN
SWITCH INDICATOR
WARNING
BRAKELAMP UNDERHOOD
Z1
18
BK
Z1
18
BK
Z1
18
BK
Z1
18
BKZ1
18
BKZ1
20
BK
C1026
A (8W-15-2)FROM
S110
BK14Z1
2C107
BK20Z1
BK20Z1
S134
Z1
20
BK
(8W-30-15)
(8W-33-3)(8W-30-3)
(8W-40-5)(8W-44-4)
PL8W-15 GROUND DISTRIBUTION 8W - 15 - 3
PLI01503008W-10

8W-30 FUEL/IGNITION SYSTEM
Component Page
A/C Compressor Clutch Relay...........8W-30-9
A/C High Pressure Switch.............8W-30-11
Airbag Control Module................8W-30-4
Automatic Shut Down Relay........8W-30-2, 3, 5
Brake Lamp Switch............8W-30-12, 13, 14
Brake Shift Interlock Solenoid.........8W-30-13
Brake Warning Indicator Switch........8W-30-13
Camshaft Position Sensor..............8W-30-7
Center High Mounted Stop Lamp.......8W-30-14
Clockspring........................8W-30-12
Clutch Interlock Switch..............8W-30-15
Controller Anti-Lock Brake..........8W-30-4, 13
Crankshaft Position Sensor............8W-30-7
Data Link Connector................8W-30-2, 4
Engine Coolant Temperature Sensor.....8W-30-7
Engine Oil Pressure Switch............8W-30-2
Engine Starter Motor Relay...........8W-30-15
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
Fuel Tank.........................8W-30-10
Fuse 6 (FB)........................8W-30-13
Fuse 7 (FB)........................8W-30-13
Fuse 10 (FB).....................8W-30-9, 10
Fuse 11 (FB).....................8W-30-9, 10
Fuse 21 (PDC)..................8W-30-2, 4, 10
Fuse 23 (PDC)......................8W-30-13
Fuse Block....................8W-30-9, 10, 13
G101........................8W-30-3, 12, 15Component Page
G102.......................8W-30-2, 4, 13, 15
G201.............................8W-30-12
G303.............................8W-30-10
Generator.........................8W-30-11
Idle Air Control Motor................8W-30-8
Ignition Coil........................8W-30-5
Inlet Air Temperature Sensor...........8W-30-6
Instrument Cluster................8W-30-4, 10
Knock Sensor.......................8W-30-6
Leak Detection Pump.................8W-30-9
Left Tail/Stop Lamp.................8W-30-14
Manifold Absolute Pressure Sensor......8W-30-6
Multi-Function Switch...............8W-30-14
Noise Suppressor....................8W-30-5
Oxygen Sensor 1/1 Upstream...........8W-30-3
Oxygen Sensor 1/2 Downstream.........8W-30-3
Park/Neutral Position Switch..........8W-30-15
Power Distribution Center......8W-30-2, 4, 10, 13
Power Steering Pressure Switch........8W-30-15
Powertrain Control Module.....8W-30-2, 3, 4, 5, 6,
7, 8, 9, 10, 11, 12, 13, 15
Proportional Evap/Purge Solenoid.......8W-30-15
Radiator Fan Relay...................8W-30-9
Remote Keyless Entry Module..........8W-30-4
Right Tail/Stop Lamp................8W-30-14
Sentry Key Immobilizer Module.........8W-30-4
Throttle Position Sensor...............8W-30-6
Torque Converter Clutch Solenoid.......8W-30-9
Vehicle Speed Control Servo........8W-30-12, 13
Vehicle Speed Control Switch..........8W-30-12
Vehicle Speed Sensor.................8W-30-8
PL8W - 30 FUEL/IGNITION SYSTEM 8W - 30 - 1

C1011
DG/OR18 A142
AUTOMATIC
SHUT
DOWN
RELAY
(IN PDC)
36
30C151C2
OXYGEN
SENSOR
1/1
SIGNAL SIGNAL1/2 SENSOR OXYGEN
OXYGEN
SENSOR
GROUND
MODULE CONTROL
POWERTRAIN
324
1
S121
UPSTREAM 1/1
SENSOR
OXYGEN
4
OXYGEN
SENSOR
1/2
DOWNSTREAM
(2.0L)
1
32
18
POWERTRAIN
CONTROL
MODULE
K41
20
BK/DGK141
20
TN/WT
K127
18
BK/OR
K127
18
BK/ORK127
18
BK/OR
8C101
Z1
18
BK
G101
C1026
Z1
18
BK
Z1
18
BK
S112
K79
18
OR/RD
HEATED
OXYGEN
SENSOR
RELAY
CONTROL
S122
27C1
A142
18
DG/ORA142
18
DG/OR
C1
BATT A14
S129
1.8L 2.0L
C16
OUTPUTRELAYDOWNSHUT AUTOMATICA142
18
DG/OR
A142
18
DG/OR
(8W-30-2)
(8W-10-17)
(8W-15-3) (8W-15-3) (8W-10-17) (8W-10-16)
PL8W-30 FUEL/IGNITION SYSTEM 8W - 30 - 3
PLI03003008W-10