Centech 64981 Instructions de montage
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Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures� Write the product’s serial number in the back
of the manual near the assembly diagram (or month and year of purchase if product has no number)� Keep
this manual and the receipt in a safe and dry place for future reference� 18k
When unpacking, make sure that the product is intact
and undamaged� If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible�
Copyright© 2018 by Harbor Freight Tools®� All rights reserved�
No portion of this manual or any artwork contained herein may be reproduced in
any shape or form without the express written consent of Harbor Freight Tools�
Diagrams within this manual may not be drawn proportionally� Due to continuing
improvements, actual product may differ slightly from the product described herein�
To ol s r eq ui r ed f o r as s em bl y a nd se rvice m a y not be i nc luded�
Read this material before using this product�
Failure to do so can result in serious injury�
SAVE THIS MANUAL�
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Table of Contents
Safety ������������������������������������������3
Specifications ������������������������������5
Overview��������������������������������������5
Setup - Before Use: ���������������������8
Operating Instructions �����������������9
DTC Definition List ���������������������16
Maintenance �������������������������������38
Troubleshooting ��������������������������38
Warranty �������������������������������������40
®
WARNING SYMBOLS AND DEFINITIONS
This is the safety alert symbol� It is used to alert you to
potential personal injury hazards� Obey all safety messages
that follow this symbol to avoid possible injury or death�
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury�
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury�
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury�
Addresses practices not related to personal injury�
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Important Safety Information
Work Area Safety
1� Keep your work area clean and well lit�
Cluttered benches and dark
areas may cause accidents�
2� Do not connect or disconnect the
Code Reader while the ignition
is on or the engine is running�
3� DO NOT attempt to operate
the Code Reader while driving
the vehicle. Have a passenger
operate the Code Reader.
4� Before testing a vehicle, engage the
parking brake and chock the tires�
5� NEVER smoke or allow a spark or
flame in vicinity of battery or engine�
6� Carbon Monoxide is produced
while the vehicle’s engine is
operating and is deadly in a closed
environment. Early signs of carbon
monoxide poisoning resemble the flu,
with headaches, dizziness, or nausea�
If you have these signs, the work
area may not be vented properly� Get
fresh air immediately� Operate the
vehicle in a well-ventilated work area�
7� Do not operate the Code Reader
in explosive atmospheres, such
as in the presence of flammable
liquids, gases, or heavy dust�
8� Keep a fire extinguisher suitable for
gasoline/chemical/electrical fires nearby�
9� Use extreme caution when working
around the ignition coil, distributor
cap, ignition wires and spark plugs�
These components create hazardous
voltages when the engine is running�
10� Keep bystanders, children and visitors
away while operating the Code Reader�
11� This product is not a toy� Do not allow
children to play with or near this item�
12� Use as intended only�
13� Inspect before every use; do not use
if parts are loose or damaged�
14� Do not place the Code Reader
on any unstable surface�
15� Handle the Code Reader with care� If
the Code Reader is dropped, check
for breakage and any other conditions
that may affect its operation�
16� Keep the Scan Tool dry, clean,
free from oil, water or grease�
Use a mild detergent on a clean
cloth to clean the outside of the
Scan Tool, when necessary�
17� Store the Code Reader and
accessories in a locked area
out of the reach of children�
18� Maintain product labels and
nameplates� These carry
important safety information�
If unreadable or missing, contact
Harbor Freight Tools for a replacement�
Electrical Safety
1� Do not use the Code Reader
while standing in water�
2� Avoid body contact with grounded
surfaces such as pipes, radiators,
ranges and refrigerators�
3� Do not expose the Code Reader to rain
or wet conditions�
Water entering the Code Reader
increases the risk of electric shock.
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4� Make sure your hands are dry before
operating the Code Reader�
Personal Safety
1� Wear ANSI-approved safety
goggles during use�
2� Do not wear loose clothing or jewelry�
Keep your hair, clothing, and
gloves away from moving parts�
Loose clothes, jewelry, or long hair
can be caught in moving parts�
3� Do not use the Code Reader while
tired or under the influence of
drugs, alcohol, or medications� A
moment of interruption can result
in serious personal injury�
4� People with pacemakers should
consult their physician(s) before
use� Electromagnetic fields in close
proximity to heart pacemaker could
cause pacemaker interference
or pacemaker failure�
5� The warnings, precautions, and
instructions discussed in this instruction
manual cannot cover all possible
conditions and situations that may
occur� It must be understood by the
operator that common sense and
caution are factors which cannot
be built into this product, but must
be supplied by the operator�
Service
There are no user serviceable parts� Code Reader service must
be performed only by qualified repair personnel�
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Specifications
Display Screen Backlit LCD
Operating Temperature 32°F to 122°F
Storage Temperature -4°F to 158°F
Power 9 to 16 VDC provided by vehicle battery
Overview
OBD II On-Board Diagnostics
It is required by the EPA that all 1996 and
newer vehicles sold in the United States be
equipped with an OBD II computer system�
OBD II is an early warning system
designed to monitor engine, transmission,
and emissions control components by
performing specific diagnostic tests�
When a fault condition is detected, the
system captures important data and
activates the “Check Engine” light�
If the light comes on, the vehicle might have
a condition that wastes fuel, shortens engine
life, or causes excessive air pollution� If
the problem that caused the light to come
on is addressed, for instance a loose gas
cap is tightened, the light will go out�
If the light comes on and stays on, a minor
engine fault condition is occurring and
should be addressed as soon as possible
If the light is blinking, a severe engine
fault condition is occurring and should
be addressed immediately�
The Code Reader connects to the vehicle’s
computer system and captures information
that can help identify the fault condition�
Vehicle Coverage
This Code Reader is designed to work with
all OBD II compliant vehicles, including
those equipped with a CAN bus�
OBD II was installed in some 1994 and
1995 model year gasoline vehicles�
To verify if a 1994 or 1995 vehicle is
OBD II compliant, check the Vehicle
Emissions Control Information label, which
is located in the engine compartment�
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Definitions
• DLC: Data Link Connector
The 16-pin connector on the vehicle
that allows communication between the
computer system and the Code Reader�
• Drive Cycle
A set of driving procedures that,
when met, provide the Enabling
Criteria for the I/M Monitors to run
and complete their diagnostic tests�
• Control Modules
Individual computers that operate
and monitor different systems in
the vehicle� Control Modules vary
depending on manufacturer�
• MIL: Malfunction Indicator Lamp
The vehicle’s “Check Engine”
warning light that activates
when a DTC is stored�
• DTC: Diagnostic Trouble Code
A code stored in the computer
system’s memory, which helps to
identify the fault condition that is
causing the MIL to activate�
• Freeze Frame Data
Operating conditions that are
stored when a DTC is stored�
• PID: Parameter Identification Data
Data returned by the vehicle’s Control
Modules to the Code Reader�
I/M Monitors
Inspection and Maintenance diagnostic tests that the Control Modules
perform on specific sub-systems of the vehicle�
There are two types of Monitors:
• Continuous: Monitors that
perform tests all the time while
the engine is running�
• Non-Continuous: Monitors that require
specific operating conditions to be met
during a Drive Cycle in order for the
Monitors to run their testing sequences�
Note: Not all Monitors are
supported by all vehicles�
Gasoline Engine Monitors
• Continuous
MIS - Misfire
FUEL - Fuel System
CCM - Comprehensive Components
• Non-Continuous
CAT - Catalyst
HCAT - Heated Catalyst
EVAP - Evaporative System
AIR - Secondary Air System
O2S - Oxygen Sensors
HTR - Oxygen Sensor Heater
EGR - EGR System
Diesel Engine Monitors
• Continuous
MIS - Misfire
FUEL - Fuel System
CCM - Comprehensive Components
• Non-Continuous
HCCAT - NMHC Catalyst
NCAT - NOx Aftertreatment
BP - Boost Pressure System
EGS - Exhaust Gas Sensor
PM - PM Filter
EGR - EGR System
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Diagnostic Trouble Code
A DTC is a five digit alphanumeric identifier for a fault condition identified
by the OBD II system� There are three types of DTCs:
1� Pending - When a fault condition
is identified during a Drive Cycle,
but does not meet enough
criteria to activate the MIL�
If the fault condition occurs during two
consecutive Drive Cycles, it will turn into
a Stored DTC and the MIL will activate�
2� Stored - A DTC is stored when a fault
condition has occurred that meets
enough criteria to activate the MIL�
3� Permanent - A stored DTC that can only
be cleared by the OBD II system, after
repairs are made, and a set number of
Driving Cycles have been completed�
Example: P0303 - Cylinder 3 Misfire
Systems
B - Body
C - Chassis
P - Powertrain
U - Network
Code Types*
0 - Generic
1 - Manufacturer Specific
2 - Generic Powertrain/Manufacturer Specific
3 - Generic Powertrain/Manufacturer Specific
Sub-Systems
1 - Fuel and Air Metering
2 - Fuel and Air Metering
(injector circuit malfunction only)
3 - Ignition Malfunction or Engine Misfire
4 - Auxiliary Emission Controls
5 - Vehicle Speed or Idle Controls
6 - Computer Output Circuits
7 - Transmission Controls
8 - Transmission Controls
03 - Cylinder 3
*The Code Reader supports the
following Code Types:
P 0 3 0 3
Generic (SAE):
P0, P2, P3, U0
Manufacturer Specific:
P1, P3, U0
Figure A
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Setup - Before Use:
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the
beginning of this document including all text under subheadings therein
before set up or use.
Functions
LCD Screen
Green
Light
Yellow
Light Red
Light
ENTER
/Exit
Button
Scroll
Button
OBD II Cable
LCD Screen
Displays test results, Code Reader
functions, and Monitor status information�
Green Light
When lit, indicates all engine system are
running normally and no DTCs are present�
Yellow Light
When lit, indicates there are
pending DTCs and/or Monitor
analysis is not finished running�
Red Light
When lit, indicates there is a fault
condition in one or more of the vehicle’s
systems and stored DTCs are present�
ENTER/Exit Button
Confirms a menu selection or
returns to Main Menu�
SCROLL Button
Scrolls through menu items or view
DTCs when more than one is present�
OBD II Cable
This 16-pin cable connects the Code Reader
to the vehicle’s DLC and battery (which
powers the Code Reader)� At the end of the
cable is a 16-pin connector (not shown)�
Page 9For technical questions, please call 1-888-866-5797.Item 64981
Operating Instructions
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the
beginning of this document including all text under subheadings therein
before set up or use.
TO PREVENT SERIOUS INJURY AND DEATH:
Carbon Monoxide is produced while the vehicle’s engine is operating and is deadly
in a closed environment. Early signs of carbon monoxide poisoning resemble the flu,
with headaches, dizziness, or nausea� If you have these signs, the work area may not be
vented properly� Get fresh air immediately�
Operate the vehicle in a well ventilated work area.
Connect Code Reader
CAUTION! Do not connect or disconnect
the Code Reader while the ignition
is on or the engine is running.
Note: The Code Reader is powered
by the vehicle’s battery�
1� Turn the engine and ignition OFF.
2� Connect the OBD II Cable to the
vehicle’s 16-pin DLC connector�
a� The DLC connector is normally
located under the dashboard on the
driver’s side� (Refer to vehicle’s
owner’s manual for location of DLC)�
b� The cable connector will
only fit one way�
DLC Connector
Figure B: Connecting Code
Reader to Vehicle
3� Turn the vehicle’s ignition ON with
the engine OFF (commonly called
the ACC or accessory position)�
4� The Screen should display the
below indicating the Code Reader
is ready to make a reading:
CAN OBDII
KC20
Figure C: Ready Screen
Note: If the Link Error! message displays:
• Verify the ignition is in the ACC position�
• Verify the vehicle is OBD II compliant�
• If the error message does not
go away, have the Code Reader
inspected by a qualified technician�
5� After the ready screen, the Code
Reader’s Main Menu should be
available� Press SCROLL to
move through each selection:
1� DTC
2� ERASE
3� I/M
4� VIN
5� RESCAN
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Taking a Reading
Note: Do not replace a part based solely on the DTC definition� Each DTC has a set of
test procedures, instructions, and flow charts that must be followed to confirm the cause
of the problem� Refer to the vehicle’s service manual for detailed testing instructions�
Notice: Observe all safety precautions
before working on a vehicle.
1� Turn off the vehicle’s ignition
and connect the Code Reader’s
16-pin OBD II Cable to the
vehicle’s DLC connector�
2� The display will indicate when
the Code Reader is ready:
CAN OBDII
KC20
Figure D: Ready Screen
3� Press ENTER/Exit and a sequence
of messages showing the OBD II
protocols will step through until the
vehicle’s protocol is detected:
SCAN
CAN STD
SCAN
CAN EXD
SCAN
PWM
SCAN
VPW
SCAN
KWP2000
SCAN
ISO9141
Figure E: : Protocol Detection Sequence
4� The messages will end at the
vehicle’s detected protocol:
SCAN
ISO9141
Figure F: Example of Vehicle’s
Detected Protocol
5� If the Link Error! message displays:
a� Turn off the ignition for 10 seconds
and check that the Code Reader’s
ODB II Cable is well seated into
the vehicle’s DLC connector�
b� Turn ignition to ACC and
repeat protocol detection�
c� If the error does not clear then there
is a communication problem between
the Code Reader and vehicle�
6� After the detected protocol is displayed,
the scanning results will appear� The
total number of DTCs and overall
I/M Monitor Status will be shown:
DTC: 10
IM: YES
Figure G: Example of Scan Results
7� Next, the screen will display the
Main Menu’s first selection:
MENU:
1. DTC
Figure H: DTC Screen
8� Press ENTER/Exit to select “DTC�”
9� If no Diagnostic Trouble Codes were
detected the green light will illuminate
and the display will indicate:
NO
CODES
Figure I: No DTCs detected
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