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DIGITAL AUTOMOTIVE 

MULTIMETER

OWNER'S MANUAL

Stock Number W2972/W2969

FOR YOUR SAFETY,

please read these instructions carefully and retain them for future use.

     WARNING!

It is the owner and/or operators’ responsibility to study all WARNINGS, operating, and maintenance instructions contained 

on the product label and instruction manual prior to operation of this product. The owner/operator shall retain product 

instructions for future reference.
The owner and/or operator are responsible for maintenance, maintaining all decals or warning labels and while in use, 

maintaining the unit in good working order. If the owner and/or operator are not fluent in English, the product warnings and 

instructions shall be read and discussed with the operators’ native language by the purchaser/owner or his designee. 

Make sure that the operator comprehends its contents. Safety information shall be emphasized and understood prior to 

usage. The product shall be inspected per the operating instructions.
Users of this product must fully understand these instructions. Each person operating this product must also be of sound 

mind and body and must not be under the influence of any substance that might impair their vision, dexterity or judgment.
Protect yourself and others by observing all safety information.
Failure to comply with instructions could result in personal injury and/or property damage! 

If you encounter any problems or difficulties, please contact our customer service department at: 1-800-426-1262 between 

6:30 a.m. and 4:30 p.m. Pacific time. 

Due to continuing improvements, actual product 

may differ slightly from photo shown.

Summary of Contents for W2969

Page 1: ... and discussed with the operators native language by the purchaser owner or his designee Make sure that the operator comprehends its contents Safety information shall be emphasized and understood prior to usage The product shall be inspected per the operating instructions Users of this product must fully understand these instructions Each person operating this product must also be of sound mind an...

Page 2: ... and mild detergent should be used to clean the surface of the Meter when servicing No abrasive and solvent should be used to prevent the surface of the Meter from corrosion damage and accident 14 The Meter is suitable for indoor use 15 Turn the Meter power off when it is not in use and take out the battery when not using for a long time Constantly check the battery as it may leak when it has been...

Page 3: ...e test settings Example If you re testing 100V DC turn the Range Selector knob to 200V DC then the highest voltage the meter can measure is 200V in that range Voltage Function AC DC Determine the current you re testing AC or DC Select the largest value within the range you re testing 1 Insert the BLACK or ground probe to the COM on the meter 2 Insert the RED or positive probe to the on the meter 3...

Page 4: ...this for resistance measurements less than 10Ω Continuity Test A quick way to check if you have an open or closed circuit The meter beeps when the circuit is closed or shorted so you don t need the meters display in view A common automotive use is checking for blown fuses proper switch operation and broken or shorted wires 1 Insert BLACK test lead into COM test lead jack 2 Insert RED test lead int...

Page 5: ...checking engine RPM the meter results must be multiply by 10 to get the final figure For example if your meter display reads 65 and is set to 6 cylinder RPM the actual engine RPM is 10 times 65 or 650 RPM 1 Insert BLACK test lead into COM test lead jack 2 Insert RED test lead into test lead jack 3 Connect RED test lead to the TACH signal wire from the DIS Ignition Module if the vehicle is equipped...

Page 6: ...of a short or excessive battery current draw Excessive draw could lead to shortened battery life or a dead battery 1 Ignition OFF including all accessories Be sure trunk hood and dome lights are all OFF 2 Insert BLACK test lead into COM test lead jack 3 Insert RED test lead into the A or mA test lead jack 4 Disconnect positive red battery cable 5 Add the alligator clips and connect RED clip to pos...

Page 7: ...E SENSORS TESTS CONT MAF vs MAP Manifold Absolute Pressure MAP is a sensor to measure vacuum the computer calculates the engine air flow based on the vacuum throttle position and intake air temperature Mass Air Flow MAF is a sensor that measures the actual air flow going into the engine MAP BARO Sensors These sensors send signals to the ECU indicating atmospheric pressure and or engine vacuum Ther...

Page 8: ...the vehicle use the special slotted socket to avoid damaging the wires 2 Insert BLACK test lead into COM test lead jack 3 Insert RED test lead into test lead jack O2 Heater Circuit The following is for testing the heater circuit of the O2 Sensor Refer to your vehicles service manual for the location of the heater pins in the wiring connector 1 Add the alligator clips and connect the RED clip to ei...

Page 9: ...4 Connect the BLACK clip to a good body GROUND 5 Refer to your service manual for the MAF location identify the power ground and signal pin ENGINE SENSORS TESTS CONT locations Typically you ll find the signal pin in the center of the three pins For this test you ll need to back probe or pierce the signal wire in the MAF wire connection Refer to vehicle service manual for best way to connect to MAF...

Page 10: ...ing applications These sensors are used whenever the vehicle ECU needs to know speed and position of a rotating object Examples of use are ignition ENGINE SENSORS TESTS CONT Ʊ Ⅴ Ʌ systems to determine camshaft and crankshaft position This enables the ECU to know the optimum time to fire the ignition coil and turn on the fuel injectors This test checks for proper switching action in any Hall Effect...

Page 11: ...NITION SYSTEM TESTS Ʊ Ⅴ Ʌ ferrous objects Reluctance sensor are used whenever the vehicle s ECU needs to know speed and or the position of a rotating object In ignition systems it s used to determine camshaft and crankshaft position This tells the vehicle ECU when to fire the ignition coil and turn on the fuel injectors Speed sensors are another type of reluctance sensor used in transmissions to m...

Page 12: ...n coil terminals are easily accessible For testing the PRIMARY SIDE of the ignition coil the engine must be cool and off You ll need to IGNITION SYSTEM TESTS CONT Ʊ Ⅴ Ʌ Ʊ Ⅴ Ʌ identify both the primary ignition coil terminals positive and the negative terminals Once identified disconnect them from the coil It s recommended to mark the wires if they re not color coded red and black Next remove the c...

Page 13: ...t the resistance of ignition wires flex the wire while testing for breaks in the carbon fibers This test can be used for DIS IGNITION SYSTEM TESTS CONT Ʊ Ⅴ Ʌ Test the Coil On Plug Insulators for breaks and those systems that mount their ignition coils away from the spark plugs 1 Pull and test the ignition wires one at a time Avoid the confusion pulling all the wires without marking where they go I...

Page 14: ... the wiring harness 3 Insert BLACK test lead into COM test lead jack FUEL SYSTEM TESTS 4 Insert RED test lead into test lead jack 5 Turn the meters range selector to the 200Ω setting Because of the sensitivity of this test touch the two probes of the test leads together View the reading on the display and record the resistance value 6 Add the alligator clips and connect the RED clip to a single pr...

Page 15: ...clip provided just push onto the test probes Low Battery When the 9v battery needs to be replaced a battery symbol will appears in the lower left corner of the display Battery Replacement Turn meter OFF and remove test leads Remove screw from battery cover remove battery cover and battery Install a new 9 Volt battery and re assemble meter Fuse Replacement Turn meter OFF and remove test leads Remov...

Page 16: ...rformance or reliability nor shall these warranties apply to any product or part which has been subject to misuse neglect accident or wear and tear incident to normal use and service PERFORMANCE TOOL does not authorize any other person to make any warranty or to assume any liability in connection with its products Except for warranties of title and the limited express warranties set forth above PE...

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