Chrysler Le Baron, Dodge Dynasty, Plymouth Acclaim. Manual — part 60
3.3L AND 3.8L MULTI-PORT FUEL INJECTION—GENERAL DIAGNOSIS
INDEX
page
page
Fuel System Diagram
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Visual Inspection
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FUEL SYSTEM DIAGRAM
Refer to the Component Identification portion of
this section for a more complete description of the
components shown in Fig. 1.
VISUAL INSPECTION
Perform a visual inspection for loose, disconnected,
or misrouted wires and hoses before diagnosing or
servicing the fuel injection system. A visual check
saves unnecessary test and diagnostic time. A thor-
ough visual inspection includes the following checks:
(1) Check ignition cable routing from the coil pack
to the spark plugs. Verify the cable are routed in the
correct order and are fully seated to the coil and
spark plug.
(2) Check direct ignition system (DIS) coil electri-
cal connection for damage and a complete connection
to the coil (Fig. 2).
(3) Verify the camshaft position sensor electrical
connector is connected to the harness and not dam-
aged (Fig. 3).
(4) Ensure the engine temperature sensor electri-
cal connector is connected to the sensor and not dam-
aged (Fig. 3).
(5) Ensure the coolant temperature sensor electri-
cal connector is connected to the sensor and not dam-
aged (Fig. 4).
(6) Verify the quick connect fuel fittings are fully
inserted on the fuel supply and return tubes.
(7) Check the vacuum hose connection at the fuel
pressure regulator for damage or leakage (Fig. 5).
(8) Check the oil pressure sending unit electrical
connection (Fig. 6).
(9) Verify the electrical connector is attached to
the Purge Solenoid (Fig. 7) and not damaged.
(10) Verify the vacuum connection at the purge so-
lenoid is secure and not leaking (Fig. 7).
Fig. 1 Multi-Port Fuel Injection Components
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FUEL SYSTEMS
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(11) Verify the hoses are securely attached to the
vapor canister (Fig. 8).
(12) Ensure the harness connectors for the fuel in-
jector are attached to the correct injector and not
damaged.
(13) Verify the fuel injector harness and engine
wiring harness connectors are fully inserted into the
main wiring harness.
(14) Check the vacuum connections at the throttle
body (Fig. 9).
(15) Ensure the idle air control motor and TPS
electrical connectors are fully seated and not dam-
aged (Fig. 9).
(16) Verify the harness connector is attached to
the electric EGR transducer solenoid (Fig. 9).
(17) Verify the vacuum connections at the trans-
ducer are secure (Fig. 9). Check all EGR system vac-
uum hoses for secure connections. Inspect the EGR
tube.
Fig. 2 Ignition Coils Electrical Connection
Fig. 3 Camshaft Position Sensor
Fig. 4 Engine Coolant Temperature Sensor
Fig. 5 Fuel Pressure Regulator Vacuum Connection
Fig. 6 Oil Pressure Sending Unit Electrical
Connection
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FUEL SYSTEMS
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(18) Inspect the park/neutral switch wiring connec-
tion for damage. Ensure the automatic transaxle
electrical connections are not damaged (Fig. 10).
(19) Check the Vacuum Hose Harness connections
at the Intake Plenum (Fig. 11).
(20) Inspect the PCV system connections for dam-
age (Fig. 12).
(21) Inspect the crankshaft position sensor electri-
cal connector for damage (Fig. 13).
(22) Ensure the vehicle speed sensor electrical con-
nector is attached to the sensor and not damaged
(Fig. 13).
(23) Verify the manifold absolute pressure (map)
sensor electrical connector is attached to the sensor
and not damaged (Fig. 14).
(24) Verify the engine ground strap is attached at
the engine (below the MAP sensor) and dash panel
(Fig. 14). Inspect the strap for corrosion or damage.
Fig. 10 Automatic Transaxle Electrical Connections
Fig. 11 Vacuum Hose Connections
Fig. 7 Canister Purge Solenoid
Fig. 8 Vapor Canister
Fig. 9 Throttle Body Electrical and Vacuum
Connections
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FUEL SYSTEMS
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(25) Check the heated oxygen sensor electrical con-
nector for damage (Fig. 14).
(26) Inspect the generator wiring connections for
damage.
(27) Check the accessory drive belt tension.
(28) Check the 60-way electrical connection at the
PCM (Fig. 15) for damage or spread terminals. Ver-
ify that the 60-way connector is fully inserted into
the PCM socket. Ensure the wires are not stretched
or pulled out of the connector.
(29) Check for full insertion of the relays in the
power distribution center (Fig. 16).
(30) Check battery cable connections.
(31) Check the power brake booster hose connec-
tion (without Anti-lock Brake Systems) (Fig. 17).
(32) Check the speed control vacuum connection
(Fig. 18).
(33) Inspect hose and wiring connections at fuel
pump. Check that wiring connector is making con-
tact with terminals on pump.
Fig. 12 PCV System
Fig. 13 Crankshaft Position Sensor and Vehicle
Speed Sensor
Fig. 14 MAP Sensor and Heated Oxygen Sensor
Fig. 15 Powertrain Control Module (PCM)
Fig. 16 Power Distribution Center
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