On-Car Service - Pontiac Fiero 1988 Service Manual

6 E 2 - 2 D R I V E A B I L J T Y
AMD EMISSIONS
- F U E L
INJECTION
(TBI)
SECTION C - COMPONENT SYSTEMS
Table of Contents
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SECTION C1
ELECTRONIC CONTROL MODULE AND SENSOR*
GENERAL DESCRIPTION , . . „ . * »
ELECTRONIC CONTROL MODULE (ECM) . .
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ECM FUNCTION . • . « , c . „
INFORMATION SENSORS
Engine Coolant Temperature Sensor o .
MAP Sensor
MAT Sensor
Oxygen (O2) Sensor
Throttle Position Sensor (TPS)
Park/Neutral Switch
A/C Request Signal „ . «
Vehicle Speed Sensor < ,
Crankshaft Sensor • < > o
DIAGNOSIS
ECM
PROM . . .
ECM INPUTS
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Coolant Temperature Sensor
MAP Sensor
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MAT Sensor
Oxygen Sensor ,
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TPS
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VSS
P/N Switch
A/C Request Signal
"DIS" Reference Signal
OlM^CAR SERVICE
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ELECTRONIC CONTROL MODULE (ECM) .
ECM & COMPONENT REPLACEMENT
PROIVI
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Functional Check
COOLANT SENSOR
MAP SENSOR
MAT SENSOR
OXYGEN SENSOR
THROTTLE POSITION SENSOR (TPS)
PARK/NEUTRAL SWITCH
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PAITS INFORMATION
Park/Neutral Switch Diagnosis
Chart C~ 1 A
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MAP O u t p u t Check
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C-1
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C1-1
C M
C1-1
C1-2
C1-2
C1-2
C1-2
C1-3
C I - 3
C1-3
C1-3
C1-4
C1-4
C I - 4
C1-4
C1-5
C1-5
C1-5
C1-5
C1-5
C1-5
C1-5
C1-5
C1-5
C1-5
C1-5
C1-5
C1-6
C1-6
C1-6
C1-7
C1-7
C1-7
C1-8
C I - 8
C I - 8
C1-9
C1-9
C1-9
CI-10
CI-12
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SECTION C2
FUEL CONTROL SYSTEM
PURPOSE
MODES OF OPERATION
Starting Mode . .
Clear Flood Mode
Run Mode .
Open Loop
Closed Loop
Acceleration Mode
Deceleration Mode
Battery Voltage Correction Mode .
Fuel Cutoff Mode
FUEL CONTROL SYSTEM COMPONENTS
BASIC SYSTEM OPERATION
THROTTLE BODY INJECTION (TBI) UNIT
Fuel Injector
Pressure Regulator
Idle Air Control (IAC) Valve .
Throttle Position Sensor (TPS)
FUEL PUMP
FUEL PUMP ELECTRICAL CIRCUIT
DIAGNOSIS
FUEL CONTROL
Idle Air Control (IAC) Valve . . .
Driveability
ON-CAR SERVICE
GENERAL SERVICE INFORMATION
Fuel Pressure Relief Procedure .
Fuel System Pressure Test . . . .
Cleaning and Inspection
Thread Locking Compound . . .
FUEL INJECTOR ASSEMBLY
PRESSURE REGULATOR ASSEMBLY
FUEL METER ASSEMBLY
THROTTLE POSITION SENSOR (TPS)
IDLE AIR CONTROL (IAC) VALVE . .
TUBE MODULE ASSEMBLY
THROTTLE BODY ASSEMBLY . . . .
MINIMUM IDLE SPEED C H E C K . . . .
THROTTLE BODY INJECTION UNIT
FUEL HOSE/PIPE ASSEMBLIES
Materials • • • • • • • • • • • < > • • • «
Fuel Line Repair
FUEL PUMP/OIL PRESSURE SWITCH
FUEL PUMP RELAY
PARTS INFORMATION
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SECTION C3
EVAPORATIVE EMISSION CONTROL SYSTEM
GENERAL DESCRIPTION
PURPOSE
EVAPORATIVE EMISSION SYSTEM . . .
RESULTS OF INCORRECT OPERATION,
DIAGNOSIS
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C2-1
C2-1
C2-2
C2-2
C2-2
C2-2
C2-2
C2-2
C2-2
C2-2
C2-2
C2-3
C2-3
C2-3
C2-4
C2-4
C2-4
C2-5
C2-5
C2-5
C2-5
C2-5
C2-5
C2-6
C2-6
C2-6
C2-6
C2-6
C2-6
C2-8
C2-9
C2-9
C2-10
C2-10
C2-11
C2-12
C2-12
C2-13
C2-13
C2-13
C2-14
C2-14
C2-14
C2-14
C3-1
C3-1
C3-1
C3-1
C3-2
VISUAL CHECK OF CANISTER C 3 - 2