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Vehicle
Service
Info
The following publishers have manuals containing diagnostic information for
electronic engine control and ignition systems. Contact the publishers for
availability and pricing, specifying the make,model and year of your vehicle.
Some manuals may be available at auto parts stores or your local public library.

Vehicle Service Manuals
Chilton Book Company
Chilton Way
Radnor, PA 19089

Haynes Publications
861 Lawrence Drive
Newbury Park, CA 91320

Cordura Publications
Mitchell Manuals, Inc.
Post Office Box 26260
San Diego, CA 92126

Motor’s Auto Repair Manual
Hearst Company250 W. 55th Street
New York, NY 10019

Suitable manuals have titles such as:
“Electronic Engine Controls”
“Fuel Injection and Feedback Carburetors”
“Fuel Injection and Electronic Engine Controls”
“Emissions Control Manual”
... or similar titles.

Vehicle Service
Manuals from General
Motors Corporation

Vehicle Service
Manuals from Ford
Motor Company (Ford,
Lincoln, Mercury)Vehicle Service
Manuals from Toyota,
Honda, Nissan

Buick, Cadillac,
Chevrolet, GEO, GMC,
Oldsmobile & Pontiac
Helm Incorporated
Post Office Box 07130
Detroit, MI 48207

Ford Publication Dept.
Helm Incorporated
Post Office Box 07150
Detroit, MI 48207

Toyota Motor Corporation
Toyota Service Publications
750 W. Victoria Street
Compton, CA 90220-5538

Vehicle Service
Manuals fromChrysler
Corporation

Honda Motor Co., Ltd.
Helm Incorporated
Post Office Box 07280
Detroit, MI 48207

Saturn
Adistra Corporation
c/o Saturn Publications
101 Union Street

Post Office Box 1000
Plymouth, MI 48170

Chrysler Corporation
Dyment Distribution Service
Post Office Box 360450
Strongsville, OH 44136

Nissan North America, Inc.
Dyment Distribution Service
c/o Nissan20770 Westwood Drive
Strongsville, OH 44136

Index

Section

1
2

3
4

Vehicle Service Information ...................... Inside front cover
Safety Precautions ............................................................... ii

Tester Basics ............................................. 1-1
Testing Sensors .......................................... 2-1
• Troubleshooting Tips.......................................... 2-1
• Engine Coolant Temperature .............................. 2-2
• Inlet Air Temperature .......................................... 2-3
• Throttle Position (TP) .......................................... 2-6
• EGR Valve Position (EVP) ................................ 2-14
• Oxygen .............................................................. 2-18
•Engine Knock .................................................... 2-26
• Manifold Absolute Pressure (MAP/BARO) ....... 2-28
• Mass Air Flow (MAF) ........................................ 2-34
• Vane Air Flow .................................................... 2-40
• Crankshaft/Camshaft Position .......................... 2-46
Magnetic Reluctance Type ......................... 2-49
HallEffect or Optical Type .......................... 2-51

Testing Ignition Modules ............................3-1
More Uses for the Sensor Probe ............... 4-1
• "Circuit Tester" Voltage Check ........................... 4-1
• Continuity Checks ............................................... 4-2
• Diode Check ........................................................ 4-4

i

Safety...