Performance Tool W2969 User manual

OWNER'S MANUAL
�WARNING: READ, UNDERSTAND AND FOLLOW ALL INSTRUCTIONS AND
WARNINGS BEFORE OPERATING THIS TOOL. FAILURE TO DO SO MAY
RESULT IN PERSONAL INJURY AND/OR PROPERTY DAMAGE AND WILL
VOID WARRANTY.
DIGITAL
AUTOMOTIVE MULTIMETER
Item Number W2969
Index
Safety Precautions .................................. 2
Vehicle Service Information .................... 3
Visual Inspection ..................................... 3
1. MultimeterBasicFunctions
Functions and Display Definitions ...... 4
Safety Information ............................... 6
Manual Conventions ............................ 6
International Electrical Symbols ......... 6
BeforeUsing theMultimeter ............... 6
Specifications ..................................... 7
Maintenance ..................................... 7
Setting the Range ............................... 8
Battery and Fuse Replacement ......... 9
Measuring DC Voltage...................... 10
Measuring AC Voltage...................... 11
Measuring Resistance...................... 11
Measuring DC Current..................... 12
Testing Diodes .................................. 13
Testing Batteries ............................... 14
2. Automotive Testing
General Testing................................. 15
-Testing Fuses ................................. 15
- Testing Switches............................. 15
- Testing Solenoids and Relays........ 16
Starting / ChargingSystem Testing . 17
-No LoadBattery Test ......................17
-Engine Off Battery Current Draw... 18
-Cranking Load Test . 19
-Voltage Drops................................. 20
-ChargingSystem Voltage Test ...... 21
3. IgnitionSystem Testing
-Ignition Coil Testing ........................ 23
-Ignition System Wires..................... 25
- Magnetic Pick-Up Coils
-Reluctance Sensors........................ 26
4. Fuel System Testing
-Measuring Fuel Injector Resistance.. 25
5. Testing Engine Sensors
-Oxygen
(0 2) Type Sensors............. 29
-Temperature Type Sensors............ 31
-Position Type Sensors.................... 32
Electrical Specifications........................ 34
Warranty .................................................34

Bosch
Bosch

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Vehicle Service Manual –Sources For Service
Information
Thefollowingisalistofsourcestoobtainvehicleserviceinformationforyour
specific vehicle.
•Contact your local Automotive Dealership Parts Department.
•Contact local retail auto parts stores for aftermarket vehicle service
information.
•Contactyourlocal library.Libraries oftenallow youtocheck-out automo-
tive service manuals.
Do a Thorough Visual Inspection
Do a thorough visual and “hands-on”underhood inspection before
starting any diagnostic procedure! You can find the cause of many
problems by just looking, thereby saving yourself a lot of time.
•Has the vehicle been serviced
recently? Sometimes things get
reconnected in the wrong place,
or not at all.
•Don’t take shortcuts. Inspect
hoses and wiring which may be
difficult to see due to location.
•Inspect the air cleaner and
ductwork for defects.
•Checksensorsandactuatorsfor
damage.
•Inspect ignition wires for:
- Damaged terminals.
- Split or cracked spark plug
boots
- Splits, cuts or breaks in the
ignition wires and insulation.
•Inspect all vacuum hoses for:
- Correct routing. Refer to ve-
hicle service manual, or Ve-
hicle Emission Control
Information(VECI) decal lo-
cated in the engine compart-
ment.
- Pinches and kinks.
- Splits, cuts or breaks.
•Inspect wiring for:
- Contact with sharp edges.
- Contactwithhotsurfaces,such
as exhaust manifolds.
- Pinched, burned or chafed in-
sulation.
- Proper routing and connec-
tions.
•Check electrical connectors for:
- Corrosion on pins.
- Bent or damaged pins.
- Contacts not properly seated
in housing.
- Bad wire crimps to terminals.

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on display. In the hold mode, the
"H" annunciator is displayed.
6. TEST LEAD JACKS
BLACK Test Lead is
always inserted in the
COM jack.
REDTest Lead is in-
serted in the jack cor-
responding to the multimeter ro-
tary switch setting.
Always connect TEST LEADS to the
multimeter before connecting them
to the circuit under test!!
10. DISPLAY LIGHT
Press button to illuminate the dis-
play.
11.DISPLAY
Used to display all measurements
and multimeter information.
Low Battery– If this symbol ap-
pears in the lower left corner of the
display, then replace the internal
9V battery. (See Battery and Fuse
Replacement on
page 9.)
High Voltage
indicator
Overrange Indi-
cation – If “1” or “-
1” appears on the
left side of the dis-
play, then the mul-
timeter is set to a
range that is too
small for the
present measure-
ment being taken.
Increase the rangeuntil thisdisap-
pears.Ifit does notdisappear after
all the ranges for a particular func-
tionhavebeentried,thenthevalue
being measuredistoo large for the
multimeter to measure. (See Set-
ting the Range onpage 8.)
Zero Adjustment
The multimeter will automatically zero
on the Volts, Amps and Battery Test
functions.
Automatic Polarity Sensing
Themultimeterdisplaywillshowaminus
(-) sign on the DC Volts and DC Amps
functions when test lead hook-up is re-
versed.
7. AC VOLTS
This function is used for measur-
ing AC Voltages in the range of 0
to 500V.
8. DC AMPS
This function is used for measur-
ing DC (Direct Current) Amps in
the range of 0 to 10A.
9. 1.5V, 9V, AND 12V BATTERY
TEST
Thisfunctionisusedtotest1.5V,
9V, and 12V batteries under
load.
DC VOLTSAC VOLTS
OHMSDIODES
1.5V, 9V and 12V
BATTERY TESTS
DC AMPS

Safety Information
The multimeter complies with the standards UL61010: in pollution degree 2,
overvoltage category CAT I 600V, CAT II 300V, and double insulation.
CAT I : is for measurements performed on circuits not directly connected to
MAINS.
CATII:is formeasurementsperformedon circuitsdirectlyconnected to alow
voltage installation.
he
protection provided by the multimeter may be impaired.
Do not use the multimeter for measurements within categories III and IV.
Manual Conventions
Inthismanual,aWarning conditions andactions that pose hazards
to the user, or may damage the multimeter or equipment under test.
nature ofthe potentialhazard andthe actions, which haveto betaken.
International Electrical Symbols
LowBattery Grounding Warning
AC DC Diode
Double Insulation Continuity Buzzer
UL Conforms to Standards of UL61010
Before Using the Multimeter
Inspect the test leads for damaged insulation or exposed metal.
Replace damaged test leads with identical parts (same model number
and electrical sp before using the multimeter.
Only use the test lead assemblies which meet the manufacturer
tions.
Test the Digital multimeter on a known live circuit to verify that the
multimeter is working properly.
Do not use or store the multimeter in a hot, humid, explosive,
the multimeter may deteriorate after it is exposed to dampness.
When servicing the multimeter, use only the same model number or
identical electrical cations replacement parts.
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accuracy = Specied accuracy +5%