Dodge RAM TRUCK 1500 1995 Service Manual page 573

B R
8W-30 FUEL/IGNITION 8W - 30 - 1
FUEL/IGNITION
C O N T E N T S
FUEL/IGNITION—GASOLINE ENGINES
page
, . . 1
GENERAL INFORMATION
This section contains separate wiring diagrams for
the 3.9L V-6 engine, 5.2L and 5.9L V-8 engines, 8.0L
V-10 engine and for the diesel engine. The circuit de-
FUEL/IGNITION—DIESEL ENGINES
page
. . 7
scriptions are divided into two sub-sections; Gasoline
Engine, and Diesel Engine. When referring to the cir­
cuit descriptions or wiring diagrams, use the correct
sub-section.
F U E L / I G N I T I O N — G A S O L I N E E N G I N E S
INDEX
page
Automatic Shut Down (ASD) Relay 1
Battery Feed 2
Camshaft Position Sensor . 4
Crankshaft Position Sensor . . . . . . . . . . . . . . . . . . . 4
Data Link Connector .
6
Diagram Index . 6
EGR Solenoid 5
Engine Coolant Temperature Sensor 4
EVAP/Purge Solenoid 5
Fuel Injectors—V-10 Engines 2
Fuel Injectors—V-6 and V-8 Engines . . . . . . . . . . . . 2
Fuel Pump Module 3
Fuel Pump Relay ..... 2
Heated Oxygen Sensor—V-6 and Light Duty V-8
Engines 3
Heated Oxygen Sensors—Heavy Duty V-8 Engines
and V-10 Engines . 3
IGNITION SWITCH
r
When the ignition switch is in the RUN position, it
connects circuit A2 from fuse 2 in the Power Distri­
bution Center (PDC) to circuit A22. Circuit A22 con­
nects to the fuse block. Through the fuse block,
circuit A22 feeds circuits A20, LIO, F23, CI and F21.
Circuits A20, LIO, F23, and CI are protected by sep­
arate fuses. A circuit breaker protects circuit F21.
When the ignition switch is in the START or RUN
position, it connects circuit Al from fuse 3 in the
PDC to circuit A21. Circuit A21 powers circuits F18,
V34, F12, and F14 through the fuse block. Separate
fuses protect each circuit. In the START position, the
ignition switch connects circuit G9 to ground.
- In the ACCESSORY or RUN position, the ignition
switch connects circuit Al to circuit A31. Circuit A31
page
Idle Air Control (IAC) Motor
3
Ignition Coil—V-10 Engines 2
Ignition Coil—V-6 and V-8 Engines . . . . . . . . . . . . . 2
Ignition Control Module—V-10 Engines . . . . . . . . . .
6
Ignition Switch 1
Intake Air Temperature Sensor 5
Malfunction Indicator Lamp (MIL)
6
Manifold Absolute Pressure Sensor 5
Overdrive Solenoid 5
Park/Neutral Position Switch 5
Power (Device) Ground 6
Service Reminder Indicator Lamp .
6
Tachometer
6
TCC Solenoid 5
Throttle Position Sensor 4
Upshift Lamp 5
Vehicle Speed Sensor 3
also connects to the fuse block and feeds circuits F30,
L5, X12, and V6. Separate fuses protect each circuit.
AUTOMATIC SHUT DOWN (ASD) RELAY
Circuit A16 from fuse 4 in the Power Distribution
Center (PDC) supplies battery voltage to the contact
side of the Automatic Shut Down (ASD) relay. Circuit
A16 is HOT at all times.
When the ignition switch is in the START or RUN
position, it connects circuit Al from fuse 3 in the
PDC to circuit A21. Circuit A21 powers circuit F18
through fuse 9 in the fuse block. Circuit F18 supplies
battery voltage to the coil side of the ASD relay. The
Powertrain Control Module (PCM) provides the
ground path for the coil side of the relay on circuit
K51. Circuit K51 connects to cavity 51 of the PCM
connector.