Dodge RAM TRUCK 1500 1995 Service Manual page 574

8W - 30 - 2 8W-30 FUEL/IGNITION—GASOLINE ENGINES
When the PCM provides grounds the ASD relay,
the relay contacts close and connect circuit A16 to
circuit A142. Circuit A142 splices to supply voltage to
the fuel injectors, ignition coil, and heated oxygen
sensor. Circuit A142 also connects to cavity 57 of the
PCM.
BATTERY FEED
Circuit A14 from the Power Distribution Center
(PDC) supplies battery voltage to cavity 3 of the Pow­
ertrain Control Module (PCM). A 30 amp fuse in cav­
ity D of the PDC protects circuit A14.
HELPFUL INFORMATION
Circuit A14 supplies power to the contact sides of
the Automatic Shut Down (ASD) relay and fuel pump
relay.
FUEL INJECTORS—V-6 AND V-8 ENGINES
When the Automatic Shut Down (ASD) relay con­
tacts close, they connect circuits A14 and A142. Cir­
cuit A142 supplies voltage to the fuel injectors. Each
injector has a separate ground circuit controlled by
the Powertrain Control Module (PCM).
Circuit K l l provides ground for injector number
one. The Kll circuit - connects to cavity 16 of the
PCM.
Circuit K12 provides ground for injector number
two. The K12 circuit connects to cavity 15 of the
PCM.
Circuit K13 provides ground for injector number
three. The K13 circuit connects to cavity 14 of the
PCM.
Circuit K14 provides ground for injector number
four. The K14 circuit connects to cavity 13 of the
PCM.
Circuit K38 provides ground for injector number
five. The K38 circuit connects to cavity 38 of the
PCM.
Circuit K58 provides ground for injector number
six. The K58 circuit connects to cavity 58 of the
PCM.
On the 5.2L and 5.9L engines, circuit K17 provides
ground for injector number seven. The K17 circuit
connects to cavity 17 of the PCM.
Also on the 5.2L and 5.9L engines, circuit K18 pro­
vides ground for injector number eight. The K18 cir­
cuit connects to cavity 18 of the PCM.
HELPFUL INFORMATION
• Circuit A142 splices to supply voltage to the fuel
injectors, ignition coil, and heated oxygen sensor.
• For information about fuel injector operation, refer
to Group 14.
FUEL INJECTORS—V-10 ENGINES
When the Automatic Shut Down (ASD) relay con­
tacts close, they connect circuits A14 and A142. Cir­
cuit A142 supplies voltage to the fuel injectors. The
Powertrain Control Module (PCM) provides the
ground for the injectors. The PCM grounds two injec­
tors at the same time. Injectors are paired as follows:
1 and 10, 2 and 7, 3 and 6, 4 and 9, 5 and 8.
Circuit K116 provides ground for injectors 1 and
10. The K116 circuit connects to cavity 16 of the
PCM.
Circuit K158 provides ground for injectors 2 and 7.
The K158 circuit connects to cavity 58 of the PCM.
Circuit K114 provides ground for injectors 3 and 6.
The K114 circuit connects to cavity 14 of the PCM.
Circuit K115 provides ground for injectors 4 and 9.
The K115 circuit connects to cavity 15 of the PCM.
Circuit K113 provides ground for injectors 5 and 8.
The K113 circuit connects to cavity 13 of the PCM.
IGNITION COIL—V-6 AND V-8 ENGINES
When the Powertrain Control Module (PCM)
grounds the Automatic Shut Down (ASD) relay, the
contacts close and connect circuits A14 and A142.
Circuit A142 supplies battery voltage to the ignition
coil. The PCM controls the ground path for the igni­
tion coil on circuit K19. Circuit K19 connects to cav­
ity 19 of the PCM.
IGNITION COIL—V-10 ENGINES
V-10 engines use two ignition coil packs. One coil
pack supplies spark to cylinders 5, 8, 9, and 10. The
other coil pack connects to cylinders 1, 2, 3, 4, 6, and
7.
When the Powertrain Control Module (PCM)
grounds the Automatic Shut Down (ASD) relay, the
contacts close and connect circuits A14 and A142.
Circuit A142 supplies battery voltage to the ignition
coil. Either the PCM or the Ignition Control Module
(ICM) provide ground for each individual coil.
The PCM controls the ground path for the coil that
supplies spark to cylinders 1 and 6 on circuit K19.
Circuit K19 connects to cavity 19 of the PCM.
The PCM controls the ground path for the coil that
supplies spark to cylinders 2 and 3 on circuit K43.
Circuit K43 connects to cavity 18 of the PCM.
The PCM controls the ground path for the coil that
supplies spark to cylinders 8 and 9 on circuit K18.
Circuit K18 connects to cavity 17 of the PCM.
The ICM controls the ground path for the coil that
supplies spark to cylinders 4 and 7 on circuit K32.
Circuit K32 connects to cavity 1 of the ICM.
The ICM controls the ground path for the coil that
supplies spark to cylinders 5 and 10 on circuit K17.
Circuit K17 connects to cavity 5 of the ICM.
FUEL PUMP RELAY
Circuit A14 from fuse 8 in the Power Distribution
Center (PDC) supplies battery voltage to the contact
side of the fuel pump relay. Circuit F18 from fuse 9