Chapter 3 Automotive Test
59
3.4
Ignition Tests
Special Attention! During the secondary ignition test, because the test voltage is about 40K volts, the secondary
ignition probe must be used for operation. It is strictly forbidden to use the ordinary probe, otherwise it is very likely
to cause personal safety injury and instrument damage.
3.4.1
Primary
The ignition system of a gasoline car usually consists of a primary coil, a secondary coil and a spark plug. There are
traditional ignition systems and electronic ignition systems. Currently, most car models already use electronic
ignition systems. The primary circuit has developed from the basic contact type and capacitive type to the system
with no distributor and one coil per cylinder that is commonly used today.
Use a P130A probe, connect one end to channel 1 of the oscilloscope, and connect the other end to the ground with
the black clip. Use a stinger to pierce the ground wire of the primary coil and hook the probe to the metal needle of
the stinger; use a current clamp to connect the other end to channel 2 of the oscilloscope. Clamp the other end on
the power cord of the primary coil, pay attention to the direction of the current (if you need to test the current,
connect a current clamp).
Use the ATO oscilloscope to test the primary ignition coil (the voltage, current, v current, signal can be
tested separately to help users troubleshoot possible faults), the specific operation is shown in Figure 3-40:
Figure 3-40 Primary ignition
Summary of Contents for ATO1000 Series
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Page 2: ...Version Info Version Date Remarks V1 0 2020 06 ...
Page 52: ...Chapter 3 Automotive Test 49 Figure 3 30 Electronic fuel pump test ...
Page 71: ...68 Figure 3 49 K line test ...
Page 79: ...76 Figure 3 57 Mazda 6 Cylinder internal pressure measurement ...
