Dodge ram truck 3500 1996 Service Manual page 1356

1 4 - 1 2 2 FUEL SYSTEM
D I A G N O S I S A N D T E S T I N G
( C o n t i n u e d )
(2) Be sure that the three 32-way connectors are
fully engaged into the powertrain control module
(PCM) (Fig. 18).
' POWERTRAIN
CONTROL MODULE
(PCM)
FRONT OF ENGINE
8056d9f8
Fig. 18 PCM Location—Typical
(3) Be sure that the electrical connections at the
intake manifold air heater relays (Fig. 19) are tight
and not corroded.
CABLES TO
BATTERY (+)
BATTERY
(LEFT SIDE)
INTAKE AIR
HEATER RELAYS (2)
RELAY
TRIGGER
WIRES (4)
RELAY MOUNTING >
BOLTS (3) J9414-85
Fig. 19 Intake Manifold Air Heater Relays
(4) Inspect the starter motor and starter solenoid
connections for tightness and corrosion.
(5) Verify that the electrical connector is firmly
connected to the intake manifold air temperature
sensor. Inspect the connector for corrosion or dam­
aged wires. The sensor is located on the top of the
intake manifold (Fig. 20).
(6) Verify that t h e water-in-fuel (WIF) sensor elec­
trical connector is firmly attached to the sensor (Fig.
AIR TEMPERATURE
SENSOR
SENSOR
ELECTRICAL
CONNECTOR
INTAKE
MANIFOLD
p u E L
(UPPER HALF) SHUTDOWN SOLENOID
SOLENOID ELECTRICAL
CONNECTOR
J9414-93
Fig. 20 Air Temperature Sensor and Fuel Shutdown
Solenoid
21). Inspect the connector for corrosion or damaged
wires.
FILTER
\ , \
w
f | H O U S l N G
FUEL FILTER/ -
WATER SEPARATOR
ELECTRICAL / V
CONNECTOR
J9414-87
Fig. 21 WateNn-Fuel (WIF) Sensor
(7) Check for water in the fuel filter/water separa­
tor. A water drain is supplied on the filter/separator.
Refer to Fuel Filter/Water Separator in the Diesel
Engine—Component Removal/Installation section of
this group for draining water.
(8) Verify that the electrical connector is firmly
connected to the fuel shutdown solenoid on the injec­
tion pump (Fig. 20). Inspect the connector for corro­
sion or damage.