Pontiac Fiero 1988 Service Manual page 428

DRIVEABILITY AND EMISSIONS - FUEL INJECTION 6E-1
SECTION 6E
DRIVEABILITY AND EMISSIONS
CONTENTS
General Information - Section 6E
Driveability and Emissions - Fuel Injected (TBI) - Section 6E2
Driveability and Emissions - Fuel Injected (PORT) - Section 6E3
6E CONTENTS
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DRIVEABILITY .«
EMISSIONS
MAINTENANCE SCHEDULE
VEHICLE EMISSIONS CONTROL
INFORMATION LABEL . . . .
INTRODUCTION . . . .
Electronic Engine Control • .
What This Section Contains .
Blocking Drive Wheels
Cold Oxygen Sensor . « < > . . .
VISUAL/PHYSICAL UNDERHOOD
INSPECTION
BASIC KNOWLEDGE REQUIRED
Basic Electric Circuits
Use of Circuit Testing Tools
Use of Digital Volt-Ohm Meter (DVM)
DIAGNOSTIC INFORMATION
"Service Engine Soon" Light
Intermit. "Service Engine Soon" Light
Trouble Codes
ALDL Connector
Diagnostic Mode
Field Service Mode
Clearing Trouble Codes
ECM Learni ng AbiI ity •
DRIVEABILITY AND E M I S S I O N S . . . . . . .
SECTIONS 8E2 and 6E3 S U M M A R Y , . . . .
SECTION A
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Diagnostic Procedure Summary
ALDL "SCAN " T O O L S .
Normal (Open) Mode
ALDL (10K, or Special) Mode
Factory Test (Backup or 3.9K) Mode . .
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6E-1
6E-1
6E-1
6E-3
SE-3
6E-3
6E-3
6E-3
6E-3
6E-3
6E-3
6E-3
6E-4
6E-4
6E-4
6E-4
6E-4
6E-4
6E-4
6E-4
6E-5
6E-5
6E-5
6E-5
6E-5
6E-6
6E-6
6E-6
6E-6
SE-7
. 6E-7
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"SCAN" TOOLS LIMITATIONS AND USE .
Intermittent Conditions • •
"SCAN" TOOL POSITIONS
SECTION B - DRIVEABILITY SYMPTOMS
SECTION C - COMPONENT SYSTEMS
Electronic Control Module (ECM) . .
Fuel Control System
Electric Fuel Pump (In-tank)
Evaporative Emission Control
Electronic Spark Timing (EST)
Electronic Spark Control (ESC)
Air Injection Reaction (A.I.R.) .
Early Fuel Evaporation (EFE)
Exhaust Gas Recirculation (EGR) . * .
Transmission Converter Clutch (TCC)
Shift Light Control
• • • • • o . . . . . . .
A/C Clutch Control
Electric Cooling Fan Control
Positive Crankcase Ventilation (PCV)
or Crankcase Ventilation (CV)
Thermostatic Air Cleaner (THERMAC) . .
ABBREVIATIONS & GLOSSARY OF TERMS . .
WIRING HARNESS SERVICE
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GENERAL . . .
WIRE HARNESS. •
CONNECTORS
Weather-Pack
Com pact Three ©®©©©®©©®®®®®©©©®
Metri-Pack Series 150 - Term'l Removal
Micro-Pack » » » « . . « • « . . « « . » « « . . « «
TOOLS NEED TO SERVICE SYSTEM
GENERAL SPECIFICATIONS. • . . • . . . . . . .
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6E-7
6E-7
6E-7
6E-10
6E-10
6E-10
6E-10
6E-10
6E-10
6E-10
6E-10
6E-10
6E-10
6E-11
6E-11
6E-11
6E-11
6E-11
6E-11
6E-11
6E-11
6E-14
6E-14
6E-15
6E-15
6E-15
6E-16
6E-16
6E-16
6E-17
6E-23
DRIVEABILITY
The driveability diagnosis procedures apply to
various systems in current GM vehicles. The
procedures assume that the vehicle worked right at
one time and the problem is due to time, wear, dirt or
other causes. Start with the introduction that follows.
This will describe a systematic diagnostic procedure.
Any system disconnected during diagnosis should
be reconnected. This includes wires, hoses, linkage,
etc. When removing air cleaner, plug hose fittings
that could cause an air leak.
EMISSIONS
The exhaust emission control systems used on
General Motors engines perform a specific function to
lower exhaust emissions while maintaining good fuel
economy and driveability.
MAINTENANCE SCHEDULE
Refer to the General Motors Maintenance
Schedule in Section "OB" of the Chassis Service
Manual for the maintenance service that should be
performed to retain emission control performance.