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. Multimeter Basic Functions
Functions and Display Definitions ...... 4
Safety Information ............................... 6
Manual Conventions ............................ 6
International Electrical Symbols ......... 6
Before Using the Multimeter ............... 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 / Charging System Testing . 17
- No Load Battery Test ......................17
- Engine
Off
Battery Current Draw ... 18
- Cranking
Load Test . 19
- Voltage Drops ................................. 20
- Charging System Voltage Test ...... 21
3. Ignition System 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
-
O
x
ygen
(0
2
) Type Sensors ............. 29
- Temperature Type Sensors ............ 31
-
Position Type Sensors .................... 32
Electrical Specifications ........................ 34
Warranty .................................................34
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