Dodge RAM TRUCK 1500 1995 Service Manual page 1110

14 - 28 COMPONENT DESCRIPTION/SYSTEM OPERATION—EXCEPT DIESEL
B R
M U L T I - P O R T F U E L I N J E C T I O N (MFI)—COMPONENT D E S C R I P T I O N / S Y S T E M
OPERATION—EXCEPT D I E S E L
INDEX
page
Air Conditioning (A/C) Controls—PCM Pins #27 and
#28—PCM Input . . . . . 41
Air Conditioning Relay—PCM Pin #34—PCM
Output . 42
Automatic Shutdown (ASD) Relay—PCM Pin
#51—PCM Output 46
Automatic Shutdown (ASD) Sense—PCM Pin
#57—PCM Input . . 48
Battery Temperature Sensor 36
Battery Voltage—PCM Pin # 3 — P C M input . . . . . . 35
Brake Switch—PCM Pin #29—PCM input . . . 41
Camshaft Position Sensor—PCM Pin #44—PCM
Input 45
CCD Bus(+)—PCM Pin #26—PCM Output . . . . . . . 41
CCD Bus(-)—PCM Pin #46—PCM Output . . . . . . . 45
Crankshaft Position Sensor—PCM Pin #24—PCM
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Data Link Connector—PCM Pin #25—PCM Output . 41
Data Link Connector—PCM Pin #45—PCM input . . 45
E G R Valve Control Solenoid—Pin #35—PCM
Output 43
Eight Volt Power—PCM Pin #7—PCM Input 36
Engine Coolant Temperature Sensor—PCM Pin
#2—PCM Input 35
EVAP Canister Purge Solenoid—PCM Pin
#52—PCM Output 46
Five Volt Power—PCM Pin #6—PCM Input . . . . . . 36
Fuel Filter . . . 48
Fuel Injectors—PCM Pin #13—PCM Output 36
Fuel Injectors—PCM Pin #14—PCM Output 37
Fuel Injectors—PCM Pin #15—PCM Output 37
Fuel Injectors—PCM Pin #16—PCM Output . . . . . . 37
Fuel Injectors—PCM Pin #17—PCM Output 38
Fuel Injectors—PCM Pin #18—PCM Output . . . . . . 38
Fuel Injectors—PCM Pin #38—PCM Output 43
Fuel Injectors—PCM Pin #58—PCM Output . . 48
Fuel Pressure Regulator 48
Fuel Pump Relay—PCM Pin #51—PCM Output . . . 46
Fuel Rail 49
General Information . 28
Generator Field—PCM Pin #20—PCM Output . . . . 39
Idle Air Control (IAC) Motor—Pin #39—PCM Output . . 43
Idle Air Control (IAC) Motor—Pin #40—PCM Output . . 44
Idle Air Control (IAC) Motor—Pin #59—PCM Output . . 48
Idle Air Control (IAC) Motor—Pin #60—PCM Output . . 48
GENERAL INFORMATION
All vehicles are equipped with either a 3.9L V-6 en­
gine, a 5.2L V-8 engine, two different 5.9L V-8 en­
gines, an 8.0L V-10 engine or a 5.9L Cummins in-line
6 cylinder diesel engine. Refer to the Diesel sections
of this group for diesel information.
The 3.9L V-6 and 5.2L V-8 engines will be referred
to in this group as: LDC (Light Duty Cycle) engines.
The 5.9L V-8 gas powered engine will be referred to
as either: LDC (Light Duty Cycle) or HDC (Heavy
page
Ignition Circuit Sense—PCM Pin #9—PCM Input . . 36
Ignition Coil Driver—PCM Pin #17—PCM Output . . 38
Ignition Coil Driver—PCM Pin #18—PCM Output . . 38
Ignition Coil Driver—PCM Pin #19—PCM Output . . 38
Intake Manifold Air Temperature Sensor—PCM Pin
#21-—PCM Input 39
Malfunction Indicator Lamp—PCM Pin #32—PCM
Output . . . . . . 42
Manifold Absolute Pressure (MAP) Sensor—PCM
Pin #1—PCM Input 35
Open Loop/Closed Loop Modes of Operation 50
Overdrive Lamp—PCM Pin #31—PCM Output . . . . 42
Overdrive Lamp—PCM Pin #37—PCM Output . . . . 43
Overdrive Solenoid—PCM Pin #55—PCM Output . 47
Overdrive/Override Switch—PCM Pin #10—PCM
Input 36
Oxygen (02S) Sensor—PCM Pin #23—PCM Input . 40
Oxygen (02S) Sensor—PCM Pin #41—PCM Input . 44
Park/Neutral Switch—PCM Pin #30—PCM Input . . 41
PCM System Schematics—Except Diesel . . 30
Power Ground—PCM Pin #11 36
Power Ground—PCM Pin #12 36
Powertrain Control Module (PCM) 29
Sensor Return—PCM Pin #4—PCM Input 36
Speed Control—PCM Pins #33 and #53—PCM
Output 42
Speed Control—PCM Pins #48, #49 and #50—
PCM Input 46
Speed Control—PCM Pins #53 and #33—PCM
Output 47
Sri Lamp—PCM Pin #56—PCM Output . . . . . . . . . 47
Tachometer—PCM Pin #43—PCM Output . . . . . . . 45
Throttle Body 48
Throttle Position Sensor—PCM Pin #22—PCM Input . 39
Torque Convertor Clutch (TCC) Solenoid—PCM Pin
#54—PCM Output 47
Transmission Temperature Sensor—PCM Pin
#42—PCM Input 44
Transmission Temperature Warning Lamp—PCM
Pin #31—PCM Output 42
Transmission Temperature Warning Lamp—PCM
Pin #36—PCM Output . 43
Vehicle Speed Sensor—PCM Pin #47—PCM Input . 45
Duty Cycle) engine. The 8.0L V-10 engine will be re­
ferred to as: HDC (Heavy Duty Cycle) engine.
Either of the HDC gas powered engines can be eas­
ily identified by the use of an engine mounted air in­
jection pump. The 3.9L V-6, 5.2/5.9L V-8 LDC gas
engines or the diesel engine will not use an air injec­
tion pump.
A sequential multi-port fuel injection (MFI) system
is used on all 3.9L V-6 or 5.2/5.9L V-8 gas powered
engines. On the 8.0L V-10 engine, a multi-port fuel