Innova GM 3123 Manuel utilisateur
Table of Contents
i GM
Paragraph Title Page No.
YOU CAN DO IT! ........................................................ ii
GENERAL INFORMATION
1.1 YOUR VEHICLE'S COMPUTER SYSTEM............... 1-1
1.2 ABOUT YOUR CODE READER................................. 1-2
1.3 TEST CONNECTOR LOCATIONS ............................ 1-2
1.4 SAFETY PRECAUTIONS........................................... 1-3
1.5 VEHICLE SERVICE MANUALS ............................... 1-3
1.6 PRELIMINARY VEHICLE DIAGNOSIS .................. 1-4
WORKSHEET
RETRIEVING ECM CODES
2.1 VEHICLES COVERED ............................................... 2-1
2.2 BEFORE YOU BEGIN ............................................... 2-2
2.3 RETRIEVING SERVICE CODES ............................. 2-3
2.4 ERASING SERVICE CODES ..................................... 2-6
2.5 ECM SERVICE CODES.............................................. 2-6
RETRIEVING ABS CODES
3.1 ANTI-LOCK BRAKE SYSTEMS ................................ 3-1
3.2 APPLICATIONS ......................................................... 3-1
3.3 RETRIEVING SERVICE CODES ............................. 3-2
3.4 ERASING SERVICE CODES ..................................... 3-7
3.5 ABS SERVICE CODES............................................... 3-9
GLOSSARY
4.1 INTRODUCTION ........................................................ 4-1
4.2 GLOSSARY OF TERMS AND ................................... 4-1
ABBREVIATIONS
WARRANTY AND SERVICE
5.1 LIMITED ONE YEAR WARRANTY .......................... 5-1
5.2 SERVICE PROCEDURES .......................................... 5-1
You Can Do It!
GM ii
Plug It In
•Test connector usually found
under the left side of the
dashboard.
•Set Selector switch to ECM A-B
position.
•Make sure ignition is off. Plug
Code Reader into test connector.
Read Fault Codes
•Turn on ignition. DO NOT
START ENGINE.
•Read codes from flashing
"Check Engine" or "Service
Engine Soon" light.
Pinpoint Problems
•Locate fault code(s) in the
appropriate Service Codes List.
1
CHECK ENGINECHECK ENGINE
SERVICESERVICE
ENGINEENGINE
SOONSOON
2
3
triev
CODE DEFINITION
haft or Crankshaft sensor - cir
el Injector circuit is not working p
possible blown fuel injector fuse
Ignition system fault - Intermittent 7X sign
loss of 58X signal or 6X signal (Saturn)
1Throttle position sensor (TPS) - signal voltag
high during engine idle or deceleration
22 Throttle position sensor (TPS) - signal
low during engine idle
Fuel cutoff relay circuit - open
ground
23 Manifold air temperature (M
voltage is low or high
Throttle position senso
Mixture Control (M
circuit problems
Intake Air T
Vehicle sp
problem
Ma
Read manual for a complete description of the Code Reader and
it's proper use and operation.
1
1-1 GM
1.1 YOUR VEHICLE'S COMPUTER SYSTEM
Today's vehicles are equipped with computer self-testing
abilities that can locate problems in your vehicle and store
them as service codes in the vehicle's onboard computer. The
Code Reader allows you access to the computer's memory and
recalls the service codes.
1.1.1 Instrument Panel Indicator Lights
Your vehicle's Instrument panel has several indicator lights, such
as the "Check Engine", "Service Engine Soon", "ABS", "Shift to
D2" and "Temperature" indicator lights. These lights do more
than tell you to check for engine, brake, or other component
malfunctions. They can also transmit the service codes in the
computer memory by blinking on and off.
NOTE:
If your instrument panel indicator lights do not come
on when you turn on the ignition, please refer to your
vehicle's service manual. You may have problems in
the car's circuitry. You must fix these problems before
you can obtain service codes from the vehicle's
onboard computer.
1.1.2 Service Codes
The service codes are also called "fault codes", "diagnostic
codes" or "trouble codes". These codes can be used to identify
systems or components which are malfunctioning.
The computer records codes for two types of problems:
■"Hard" Codes. "Hard" codes are stored for problems
which are happening now. The instrument panel indicator
light will stay on when the engine is running.
■"Intermittent" Codes or "Continuous Memory" Codes.
Intermittent service codes are stored in the computer's
memory for problems which occur intermittently, or for
problems which happened in the past but are not currently
present. Intermittent problems may cause the panel
indicator light to flicker or to turn on intermittently.
Intermittent codes are stored in the computer's memory for
a set period of time (usually 50 start cycles). If an
intermittent problem does not recur within this time
period, the computer automatically erases the related
intermittent fault code from it's memory.
CHECK ENGINECHECK ENGINE
SERVICESERVICE
ENGINEENGINE
SOONSOON
General Information
GM 1-2
NOTE :
For Saturn vehicles, either the "Shift to D2" light or
the "Temperature" indicator light is used to transmit
Saturn Electronic Transmission codes.
1.2 ABOUT YOUR CODE READER
The Code Reader is a device which connects to your vehicle's
computer self-test connector. It allows the computer to output
the service codes through the vehicle's instrument panel
indicator lights. The Code Reader can be used to retrieve:
■Engine/Electronic Transmission codes (ECM/PCM)
NOTE:
Unless otherwise indicated, any reference to ECM
throughout this manual also applies to PCM.
■Anti-Lock Brake System codes (ABS)
1.2.1 Controls and Indicators
Selector Switch – Selects
operating mode for Code Reader:
■ECM A-B – Use to retrieve ECM
codes
■ABS A-H – Use to retrieve ABS
service codes
1.3 TEST CONNECTOR LOCATIONS
•The gateway to your vehicle's onboard computer.
Your vehicle test connector also
known as the Assembly Line Data
Link (ALDL) connector or Assembly
Line Communication Link (ALCL)
connector is usually black in color
and is most likely found under the left side of the dashboard.
Some connectors can be found on the right kick panel, under
the center of the dashboard, on the side of the fuse block or
under the ashtray in the center console. The connector might
have a plastic cover on it labeled "Diagnostic Connector". If
you have any questions about the connector's location, please
refer to your vehicle's service manual for detailed information.
1
1-3 GM
1.4 SAFETY PRECAUTIONS
•Always observe safety precautions whenever working on a
vehicle.
a. Always wear safety eye protection.
b. Only work on your vehicle in a well-ventilated area.
c. Put transmission in “park” (for automatic) or “neutral” (for
manual). Set parking brake.
d. Put blocks on drive wheels.
e. Avoid moving fan blades or any potentially moving parts.
f. Avoid hot engine parts.
g. Turn off ignition before connecting (or disconnecting) any
testing equipment.
h. Please read your vehicle’s service manual and follow it’s
safety procedure.
1.5 VEHICLE SERVICE MANUALS
It is recommended that you consult
the manufacturer’s instructions and
specifications in these service man-
uals before any test or tune-up
procedures are performed.
IMPORTANT: You MUST use the
wiring diagrams in your vehicle's
service manual to ensure proper
connections during testing.
Contact your local car dealership, auto parts store, bookstore
or public library for availability of these manuals. The
following companies publish valuable repair manuals:
■General Motors Publications, Helm, Inc., 14310 Hamilton
Ave., Highland Park, MI 48203, Phone: (800) 782-4356
■Haynes Publications, 861 Lawrence Drive, Newbury Park,
California 91320, Phone: (805) 498-6703, Fax: (805) 498-
2867
■Mitchell International, 14145 Danielson St., Poway,
California 92064, Phone: (888) 724-6742
■Motor Publications, 5600 Crooks Road, Troy, Michigan
48098, Phone: (800) 426-6867, Fax: (313) 828-0215
F8
PNK-BLK PNK-BLK F/P FUSE
DK GRN-WHT
BLK-WHT
PNK-BLK
GRY
RED
FUEL PUMP
PRIME CONN FUEL PUMP
6
2
4
1
3
TYPICAL WIRING
DIAGRAM
General Information
GM 1-4
1.6 PRELIMINARY VEHICLE DIAGNOSIS WORKSHEET
The purpose of this form is to help you gather preliminary information
on your vehicle before you retrieve codes. By having a complete
account of your vehicle's current problem(s), you will be able to
systematically pinpoint the problem(s) by comparing your answers to
the fault codes you retrieve. You can also provide this information to
your mechanic to assist in diagnosis and help avoid costly and
unnecessary repairs. It is important for you to complete this form to help
you and/or your mechanic have a clear understanding of your vehicle's
problems.
NAME:
DATE:
VIN*:
YEAR:
MAKE:
MODEL:
ENGINE SIZE:
VEHICLE MILEAGE:
*VIN: Vehicle Identification Number, found at the base of the
windshield on a metallic plate, or at the driver door latch area (consult
your vehicle owner's manual for location).
TRANSMISSION:
❑Automatic
❑Manual
Please check all applicable items in each category.
DESCRIBE THE PROBLEM:
1
1-5 GM
WHEN DID YOU FIRST NOTICE THE PROBLEM:
❑Just Started
❑Started Last Week
❑Started Last Month
❑Other:
LIST ANY REPAIRS DONE IN THE PAST SIX MONTHS:
PROBLEMS STARTING
ENGINE QUITS OR STALLS
IDLING CONDITIONS
RUNNING CONDITIONS
❑No symptoms
❑Will not crank ❑Cranks, but will not start
❑Starts, but takes a long time
❑No symptoms
❑Right after starting
❑When shifting into gear
❑During steady-speed driving
❑Right after vehicle comes to a stop
❑While idling
❑During acceleration
❑When parking
❑No symptoms
❑Is too slow at all times
❑Is too fast
❑Is sometimes too fast or too slow
❑Is rough or uneven
❑Fluctuates up and down
❑No symptoms
❑Runs rough
❑Lacks power
❑Bucks and jerks
❑Poor fuel economy
❑Hesitates or stumbles on
accelerations
❑Backfires
❑Misfires or cuts out
❑Engine knocks, pings or rattles
❑Surges
❑Dieseling or run-on
General Information
GM 1-6
AUTOMATIC TRANSMISSION PROBLEMS (if applicable)
PROBLEM OCCURS
❑Morning ❑Afternoon ❑Anytime
ENGINE TEMPERATURE WHEN PROBLEM OCCURS
❑Cold ❑Warm ❑Hot
DRIVING CONDITIONS WHEN PROBLEM OCCURS
DRIVING HABITS
GASOLINE USED
WEATHER CONDITIONS WHEN PROBLEM OCCURS
CHECK ENGINE LIGHT / DASH WARNING LIGHT
❑Sometimes ON ❑Always ON ❑Never ON
PECULIAR SMELLS
STRANGE NOISES
❑Short - less than 2 miles
❑2 ~ 10 miles
❑Long - more than 10 miles
❑Stop and go
❑While turning
❑While braking
❑At gear engagement
❑With A/C operating
❑With headlights on
❑During acceleration
❑Mostly driving downhill
❑Mostly driving uphill
❑Mostly driving level
❑Mostly driving curvy roads
❑Mostly driving rough roads
❑Mostly city driving
❑Highway
❑Park vehicle inside
❑Park vehicle outside
❑Drive less than 10 miles per day
❑Drive 10 to 50 miles per day
❑Drive more than 50 miles per day
❑87 Octane
❑89 Octane ❑91 Octane
❑More than 91 Octane
❑32 ~ 55°F (0 ~ 13°C)
❑Below freezing (32°F / 0°C) ❑Above 55°F (13°C)
❑"Hot"
❑Sulfur ("rotten egg")
❑Burning rubber
❑Gasoline
❑Burning oil
❑Electrical
❑Rattle
❑Knock ❑Squeak
❑Other
❑No symptoms
❑Shifts too early or too late
❑Changes gear incorrectly
❑Vehicle does not move when in
gear
❑Jerks or bucks
2
2-1 GM
2.1 VEHICLES COVERED
This Code Reader may be used to retrieve engine service codes
from most General Motors (GM) and Saturn domestic cars and
trucks (EXCEPT Geo, Nova, and Sprint). Includes all models
EXCEPT Cadillacs and diesel vehicles. Specific makes and
models are listed below.
Model
Year Make Model
1982-93 Buick Century, Electra, Electra Wagon, Estate
Wagon, Le Sabre, Le Sabre Wagon, Park
Avenue, Reatta*, Regal, Grand National,
Riviera*, Roadmaster, Skyhawk, Skylark,
Somerset
Chevrolet Berreta, Camaro, Caprice, Cavalier, Cele-
brity, Chevette, Citation, Corisca, Corvette,
El Camino, Impala, Lumina, Monte Carlo
Oldsmobile Achieva, Calais, Custom Cruiser, Cutlass
Calais, Ciera, Cutlass Cruiser, Cruiser
Wagon, Cutlass Supreme, Supreme Classic,
Delta 88, Eighty-eight, Firenze, Ninety-
eight, Omega, Toronado*, Touring Sedan,
Trofeo*
Pontiac 6000, 6000 STE, Bonneville, Fiero, Firebird,
Grand Am, Grand Prix, J 2000, Lemans,
J Parisienne, Phoenix, Safari, Safari Wagon,
Sunbird, T 1000
Saturn All models
Trucks All one ton capacity or less with gas
and Vans engines
1994 Buick Roadmaster 5.7 liter
Chevrolet Camaro 3.4 liter/5.7 liter, Caprice 5.7 liter,
Caprice 5.7 liter, Cavalier 3.1 liter,
Lumina 3.1 liter
Pontiac Firebird 3.4 liter/5.7 liter, Sunbird 2.0 liter/
3.1 liter
Saturn All models
Trucks All one ton capacity or less with gas
and Vans engines
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