SAFETY INFORMATION
WARNING!
To avoid possible electric shock or personal injury, and
to avoid possible damage to the Meter or to the
equipment under test, adhere to the following rules:
1. B
efore using the Meter inspect the case. Do not
use the Meter if it is damaged or the case (or part of the
case) is removed. Look for cracks or missing plastic.
Pay attention to the insulation around the connectors.
2. Inspect the test leads for damaged insulation or
exposed metal. Check the test leads for continuity.
3. Do not apply more than the rated voltage, as
marked on the Meter, between the terminals or
between any terminal and grounding.
4. The rotary switch should be placed in the right
position and no any changeover of range shall be
made during measurement is conducted to prevent
damage of the Meter.
5. When the Meter working at an effective voltage
over 60V in DC or 30V rms in AC, special care should
be taken for there is danger of electric shock.
6. Use the proper terminals, function, and range for
your measurements.
7. Do not use or store the Meter in an environment of
high temperature, humidity, explosive, inflammable and
strong magnetic field. The performance of the Meter
may deteriorate after dampened.
8. When using the test leads, keep your fingers
behind the finger guards.
9. Replace the battery as soon as the battery
indicator appears. With a low battery, the Meter
might produce false readings that can lead to electric
shock and personal injury.
10. Remove the connection between the testing leads
and the circuit being tested, and turn the Meter power
off before opening the Meter case.
11. When servicing the Meter, use only the same
model number or identical electrical specifications
replacement parts.
12. The internal circuit of the Meter shall not be altered
at will to avoid damage of the Meter and any accident.
13. Soft cloth 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 using for some time, replace the battery as soon as
leaking appears. A leaking battery will damage the Meter.
INDEX
Cover Page pg. 1
Index pg. 2
Safety Information pg. 3
Electrical Symbols pg. 3
Specifications pg. 3
Meter Identification pg. 3
Basic Tests pg. 3
Setting Range Position pg. 3
AC/DC Voltage pg. 3
Measuring DC Amps/Milliamps pg. 4
Resistance Test pg. 4
Continuity Open Circuit Test pg. 4
Diode Test pg. 4
Mechanical Tests pg. 5
Engine RPM pg. 5
Measuring Dwell pg. 5
Battery/Starting/Charging pg. 5
No Load Battery Test pg. 5
Cranking Battery Load Test pg. 5
Battery Current Draw pg. 6
Finding Excessive Current Draw pg. 6
Charging System Voltage pg. 6
Engine Sensors Tests pg. 6
Throttle/EGR Valve Position, Air Flow pg. 6
Manifold Absolute Pres. MAP Sensor pg. 7
Barometric Pressure BARO Sensor pg. 7
Oxygen Position Sensor pg. 8
O2 Heater Circuit pg. 8
O2 Sensor Circuit pg. 8
Mass Air Flow MAF Sensor pg. 9
Temperature Sensor pg. 9
Hall Effect Sensor pg. 10
Fuse/Switch/Solenoid Tests pg. 10
Fuses/Switches pg. 10
Solenoid/Relays pg. 11
Ignition System Tests pg. 11
Distributor Cap/Rotor Resistance pg. 11
Variable Reluctance Sensor pg. 11
Crankshaft Timing Sensor pg. 11
Pick-up Coil Resistance pg. 12
Ignition Coil pg. 12
Coil Switching ON/OFF pg. 13
Ignition Wires pg. 13
Fuel System Tests pg. 13
C3 Meter Control Solenoid pg. 13
Measuring Fuel Injector Resistance pg. 14
Injector Test pg. 14
Injector Wiring Harness Test pg. 14
Maintenance & Troubleshooting pg. 15
Overrange Indication pg. 15
Zero Adjustment pg. 15
Automatic Polarity pg. 15
Alligator Clip Adapters pg. 15
Low Battery pg. 15
Battery Replacement pg. 15
Fuse Replacement pg. 15
Warranty pg. 16
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