14 - 28 FUEL SYSTEMS |
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2.2L/2.5L SINGLE POINT FUEL INJECTIONÐGENERAL DIAGNOSIS
INDEX
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page |
60-Way Engine Controller Wiring Connector |
. . . . . 36 |
State Display Test Mode . . . . . . . . . . . . . . . . . . |
. . 35 |
Circuit Actuation Test Mode . . . . . . . . . . . . |
. . . . . 36 |
Systems Test . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 35 |
Fault Code Description . . . . . . . . . . . . . . . . . |
. . . . 35 |
Throttle Body Minimum Air Flow Check Procedure |
. . 36 |
Fuel System Diagram . . . . . . . . . . . . . . . . . . |
. . . . 28 |
Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . |
. 28 |
On Board Diagnostics . . . . . . . . . . . . . . . . . |
. . . . 33 |
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FUEL SYSTEM DIAGRAM
The fuel injection system is managed by the engine controller. The controller receives inputs from various switches and sensors (Fig. 1). Based on these inputs the engine controller adjusts ignition timing and idle speed through output devices. Refer to the Single Point Fuel Injection System Operation section of this group for system and component descriptions.
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 helps save unnecessary test and diagnostic time. A thorough visual inspection includes the following checks:
(1) Check Ignition Coil Electrical Connections (Fig. 2).
Fig. 2 Ignition Coil
Fig. 1 Single Point Fuel Injection Components
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FUEL SYSTEMS 14 - 29 |
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(2)Verify the electrical connector is attached to the Canister Purge Solenoid (Fig. 3).
(3)Verify vacuum connection at Canister Purge Solenoid is secure and not leaking.
Fig. 3 Canister Purge Solenoid
(4) Verify the wiring connector is attached to the Electric EGR Transducer (EET) solenoid (Fig. 4).
Fig. 4 Electric EGR Transducer (EET) Assembly
(5)Verify vacuum connection at the Electric EGR Transducer is secure and not leaking (Fig. 4).
(6)Verify the connector is attached to the MAP sensor (Fig. 5).
(7)Verify the vacuum hose is attached to the MAP sensor (Fig. 5).
(8)Verify the alternator wiring and belt are correctly installed and tightened.
(9)Verify hoses are securely attached to vapor canister (Fig. 6).
(10)Verify the throttle body wiring connection to main harness is attached (Fig. 7).
(11)Verify the electrical connector is attached to AIS motor (Fig. 8).
Fig. 5 Manifold Absolute Pressure (MAP) Sensor
Fig. 6 Vapor Canister
Fig. 7 Throttle Body Wiring Connection to Main Harness
(12)Verify the electrical connector is attached to the throttle position sensor (Fig. 8).
(13)Verify the electrical connector is attached to the fuel injector (Fig. 8).
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Fig. 8 Throttle Body Wiring Connections
Fig. 9 Vacuum Hose from Intake Manifold to PCV Valve
(14)Verify the hose from PCV valve is securely attached to the intake manifold vacuum port (Fig. 9).
(15)Verify vacuum connections on the front and rear of Throttle Body are secure and not leaking (Figs. 10 and 11).
(16)Verify hoses are attached to back pressure transducer or electric EGR transducer (EET) (Fig. 11).
(17)Verify heated air door vacuum connection is connected and not leaking.
(18)Verify power brake and speed control vacuum connectors are tight (Fig. 12).
(19)Verify all ignition cables are in correct order and seated into place (Fig. 13).
Fig. 10 Throttle Body Vacuum PortsÐFront
Fig. 11 Throttle Body Vacuum PortsÐRear
Fig. 12 Power Brake and Speed Control Vacuum
Connection
(20) Verify the electrical connector is attached to coolant temperature sensor (Fig. 14).
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FUEL SYSTEMS 14 - 31 |
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Fig. 13 Ignition Cable Routing and Connection |
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(21) Verify battery negative ground eyelet is |
Fig. 15 Distributor, Oil Pressure Switch, and Radia- |
mounted to the cylinder head (Figs. 14). |
tor Fan Electrical Connections |
Fig. 16 Automatic Transmission Electrical Connec-
tions
Fig. 14 Coolant Temperature Sensor
(22)Verify electrical connector is attached to distributor (Fig. 15).
(23)Verify radiator fan electrical connector is attached to the harness (Fig. 15).
(24)Verify oil pressure switch electrical connector is attached to the switch (Fig. 15).
(25)On automatic transmission equipped vehicles, verify the neutral safety switch electrical connector is attached to the switch (Fig. 16).
(26)On automatic transmission equipped vehicles, check the torque convertor lockup solenoid electrical connection (Fig. 16).
(27)Verify the 60-way connector is fully inserted into the socket on the Engine Controller (Fig. 17).
Fig. 17 Engine Controller Electrical Connector
(28)Verify all electrical connectors are fully inserted into relays and that battery connections are clean and tight (Figs. 18, 19, 20, 21, and 22).
(29)Verify engine harness to main harness connections are fully inserted.
(30)Check the distance sensor connector (Fig. 23).
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Fig. 18 Power Distribution Center (PDC) (AC Body) |
Fig. 21 Power Distribution Center (PDC) (AG and AJ |
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Body) |
Fig. 19 Relay Identification (AC Body)
Fig. 22 Relay Identification (AG and AJ Body)
Fig. 23 Distance Sensor Wiring Connection
Fig. 20 Relay Identification (AA and AP Bodies)