2000 DODGE NEON fuel pump

be checked. To determine if a high current draw con-
dition exists first check the vehicle with a test lamp.
(1) Verify that all electrical accessories are OFF.
²Remove key from ignition switch
²Turn off all lights
²Trunk lid is closed
²Engine compartment hood lamp is disconnected
or lamp removed
²Map lamp on rear view mirror
²Glove box door is closed
²Sun visor vanity lights are OFF
²All doors are closed
²Allow the ignition key lamp system to time out
in approximately 30 seconds, if equipped.
(2) Disconnect battery negative cable (Fig. 5).
(3) Connect a 12 Volt test lamp, with a cold resis-
tance of 5-7 ohms, between the battery negative cable
clamp and the negative post (Fig. 6). If test lamp
goes out system is OK. If test lamp lights and stays
ON, go to Test Lamp Stays ON procedure.
TEST LAMP STAYS ON
There is either a short circuit or a fault in an elec-
tronic module. Two fuses in the Power Distribution
Center (PDC) feed the modules with ignition off
draw.
²Interior lamps fuse (10 Amp) (IOD) PDC
²Fuel pump fuse (20 Amp) in PDC.
(1) Remove interior lamp and fuel pump fuses. By
removing these fuses all ignition off draw from thevehicle electronics will be disconnected. The test
lamp should go out. If test lamp goes out go to Step
2. If test lamp does not go out there is a current
draw or short circuit. Refer to Group 8W, Wiring Dia-
grams.
(2) Install the fuel pump fuse. If test lamp lights,
there is a current draw or short circuit in the A14
wiring circuit feed.
(a) Disconnect Powertrain Control Module.
(b) If test lamp goes out, replace Powertrain
Control Module.
(c) If test lamp does not go out, there is a cur-
rent draw or short circuit in the A14 circuit feed.
Refer to Group 8W, Wiring Diagrams.
(3) Install the interior lamp fuse. If test lamp
lights, there is a current draw or short circuit in the
M01 circuit. Refer to Group 8W, Wiring Diagrams. If
test lamp stays out, go to Step 4.
(4) Use a multi-meter that has at least a range of
200 milliamperes. Install meter between the battery
negative cable and battery negative post (Fig. 7).
Carefully remove the test lamp without disconnecting
the meter. After all modules time-out the total vehi-
cle IOD should be less than 10 milliamperes. If igni-
tion off draw is more than 10 milliamperes go to Step
5.
(5) Remove both fuses from the Power Distribution
Center:
²Fuel pump fuse (20 Amp)
²Interior lamps fuse (10 Amp)
(6) If there is any reading with fuses removed
there is a current draw or short circuit in the wiring.
Fig. 5 Disconnect and Isolate Battery Negative
Cable
1 ± NEGATIVE CABLE
2 ± NEGATIVE BATTERY POST
Fig. 6 Ignition OFF (IOD) Test
1 ± NEGATIVE TERMINAL
2 ± 12 VOLT TEST LIGHT
3 ± PDC
4 ± AIR CLEANER HOUSING
5 ± NEGATIVE BATTERY POST
PLBATTERY 8A - 5
DIAGNOSIS AND TESTING (Continued)

Refer to Group 8W, Wiring Diagrams. If OK go to
Step 7.
(7) Install interior lamp fuse. After installing fuse,
the current can reach 250 milliamperes. After time-
out the reading should not exceed 8 milliamperes. If
NOT OK go to Step 8. If OK go to Step 9.
²Ignition key lamp system
²Radio
²Remote keyless entry module, if equipped
(8) Disconnect radio and ignition switch key lamp
one component at time, to see if any component is at
fault. If the high reading is not eliminated there is a
short circuit in the wiring. Refer to Group 8W, Wir-
ing Diagrams.
CAUTION: Always disconnect the meter before
opening a door.
(9) Remove interior lamps fuse and install the fuel
pump fuse. The reading should be between 1-3 milli-
amperes. If reading is higher than 3 milliamperes:
(a) Disconnect Powertrain Control Module.
(b) If reading drops to zero, replace Powertrain
Control Module.
(c) If reading remains the same there is a cur-
rent draw or short circuit in the A14 circuit. Refer
to Group 8W, Wiring Diagrams.
BATTERY LOAD TEST
A fully charged battery must have cranking capac-
ity, to provide the starter motor and ignition system
enough power to start the engine over a broad range
of ambient temperatures. A battery load test will ver-
ify the actual cranking capability of the battery.WARNING: IF BATTERY SHOWS SIGNS OF FREEZ-
ING, LEAKING, LOOSE POSTS, OR EXCESSIVELY
LOW ELECTROLYTE LEVEL, DO NOT TEST. ACID
BURNS OR AN EXPLOSIVE CONDITION MAY
RESULT.
(1) Remove both battery cables, negative cable
first. The battery top, cables and posts should be
clean. If green dot is not visible in indicator, charge
the battery. Refer to Battery Charging Procedures in
this group.
(2) Connect a Volt/Ammeter/Load tester to the bat-
tery posts (Fig. 8). Rotate the load control knob of the
Carbon pile rheostat to apply a 300 amp load. Apply
this load for 15 seconds to remove the surface charge
from the battery, and return the control knob to off
(Fig. 9).
(3) Allow the battery to stabilize for 2 minutes,
and then verify open circuit voltage.
Fig. 7 Milliampere Meter Connection
1 ± NEGATIVE TERMINAL
2 ± MILLIAMPERE METER
3 ± PDC
4 ± AIR CLEANER HOUSING
5 ± NEGATIVE BATTERY POST
Fig. 8 Volt-Ammeter Load Tester Connections -
Typical
1 ± INDUCTION AMPMETER CLAMP
2 ± NEGATIVE CLAMP
3 ± POSITIVE CLAMP
Fig. 9 Remove Surface Charge From Battery
8A - 6 BATTERYPL
DIAGNOSIS AND TESTING (Continued)

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)

KNOCK SENSOR
DESCRIPTION
The knock sensor threads into the cylinder block.
OPERATION
When the knock sensor detects a knock in one of
the cylinders, it sends an input signal to the PCM. In
response, the PCM retards ignition timing for all cyl-
inders by a scheduled amount.Knock sensors contain a piezoelectric material
which constantly vibrates and sends an input voltage
(signal) to the PCM while the engine operates. As the
intensity of the crystal's vibration increases, the
knock sensor output voltage also increases.
NOTE: Over or under tightening affects knock sen-
sor performance, possibly causing improper spark
control.
IGNITION SWITCH
In the RUN position, the ignition switch connects
power from the Power Distribution Center (PDC) to a
fuse in the fuse block, back to a bus bar in the PDC.
The bus bar feeds circuits for the Powertrain Control
Module (PCM), Proportional purge solenoid, EGR
solenoid, and ABS system. The bus bar in the PDC
feeds the coil side of the radiator fan relay, A/C com-
pressor clutch relay, and the fuel pump relay. It also
feeds the Airbag Control Module (ACM)
LOCK KEY CYLINDER
DESCRIPTION
The lock cylinder is inserted in the end of the
housing opposite the ignition switch.
OPERATION
The ignition key rotates the cylinder to 5 different
detents (Fig. 9) :
²Accessory
²Off (lock)
²Unlock
²On/Run
²Start
Fig. 7 Target MagnetÐTypical
1 ± CAM MAGNET/TARGET
2 ± CAMSHAFT POSITION SENSOR
Fig. 8 Target Magnet Polarity
1 ± TARGET MAGNET
Fig. 9 Ignition Lock Cylinder Detents
PLIGNITION SYSTEM 8D - 5
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

POWER DISTRIBUTION CENTER
NOT
USED
FAN RADIATOR
RELAY
USEDNOT NOT
USEDFUEL
PUMP
NOT
USED
USEDNOT
RELAYHORN RELAY
USEDNOT
NOT
USED FUSE
10 FUSE 22 FUSE 23
FUSE 20 FUSE 21
FUSE 18 FUSE 19
FUSE 16 FUSE 17
FUSE 14 FUSE 15
FUSE 12 FUSE 13
11 FUSE
9 FUSE FUSE
8
FUSE
67FUSE
FUSE
45FUSE
FUSE
23FUSE
ENGINE
STARTER
MOTOR
RELAY RELAY CLUTCH COMPRESSORA/C RELAY SHUT DOWNAUTOMATIC
8W - 10 - 2 8W-10 POWER DISTRIBUTIONPL
008W-10PLI01002

CAVITYFUNCTION CIRCUIT
--
- -
CIRCUIT FUNCTIONCAVITY
CAVITYFUNCTION CIRCUIT
--
73
DUAL HORNS A16 14GYRADIATOR FAN RELAY CONTROL C27 18DB/PKFUSED IGNITION SWITCH OUTPUT (ST-RUN) F12 18DB/WT
70FUSED B(+) FUSED IGNITION SWITCH OUTPUT (ST-RUN)
HORN RELAY CONTROL HORN RELAY OUTPUT A14 18RD/WT F12 18DB/WT
X3 20BK/RD X2 18DG/RD 61 60
59
43FUSED B(+) F62 18RD 39
F62 18RD FUSED B(+)
X2 18DG/RD
41HORN RELAY OUTPUT 40 63FUEL PUMP RELAY OUTPUT A141 18DG/WT
K31 18BR
69FUEL PUMP RELAY CONTROL
62
42
72
FUSED B(+)
RELAYPUMPFUEL
HORN
RELAY
RADIATOR
FAN
RELAY
71 C25 12LG RADIATOR FAN RELAY OUTPUT
8W - 10 - 6 8W-10 POWER DISTRIBUTIONPL
008W-10PLI01006