Dodge Dakota Sport 2001 Service Manual page 1354

AN
FUEL INJECTION
DIAGNOSIS AND TESTING - VISUAL
INSPECTION—3.9L/5.2L/5.9L ENGINES
A visual inspection for loose, disconnected or incor-
rectly routed wires and hoses should be made. This
should be done before attempting to diagnose or ser-
vice the fuel injection system. A visual check will
help spot these faults and save unnecessary test and
diagnostic time. A thorough visual inspection will
include the following checks:
(1) Verify three 32–way electrical connectors are
fully inserted into connector of powertrain control
module (PCM) (Fig. 1).
Fig. 1 Powertrain Control Module (PCM)
1 - RIGHT FRONT FENDER
2 - PCM MOUNTING BOLTS (3)
3 - 32–WAY CONNECTORS (3)
4 - COVER
5 - POWERTRAIN CONTROL MODULE (PCM)
(2) Inspect battery cable connections. Be sure they
are clean and tight.
(3) Inspect fuel pump relay and air conditioning
compressor clutch relay (if equipped). Inspect ASD
relay connections. Inspect starter motor relay connec-
tions. Inspect relays for signs of physical damage and
corrosion. The relays are located in Power Distribu-
tion Center (PDC) (Fig. 2). Refer to label on PDC
cover for relay location.
(4) Inspect ignition coil connections. Verify coil sec-
ondary cable is firmly connected to coil (Fig. 3).
(5) Verify distributor cap is correctly attached to
distributor. Be sure spark plug cables are firmly con-
nected to the distributor cap and the spark plugs are
in their correct firing order. Be sure coil cable is
Fig. 2 Power Distribution Center (PDC)
1 - POWER DISTRIBUTION CENTER (PDC)
Fig. 3 Ignition Coil—3.9/5.2/5.9L Engines—Typical
1 - ACCESSORY DRIVE BELT TENSIONER
2 - COIL CONNECTOR
3 - IGNITION COIL
4 - COIL MOUNTING BOLTS
firmly connected to distributor cap and coil. Be sure
camshaft position sensor wire connector (at the dis-
tributor) is firmly connected to harness connector.
Inspect spark plug condition. Refer to 8, Ignition.
Connect vehicle to an oscilloscope and inspect spark
events for fouled or damaged spark plugs or cables.
(6) Verify generator output wire, generator connec-
tor and ground wire are firmly connected to genera-
tor.
(7) Inspect system body grounds for loose or dirty
connections. Refer to 8, Wiring for ground locations.
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