The purpose of this test is to look at exhaust pulsations with the First Look sensor to assess engine condition whilst cranking.
Connection for diagnostic work will vary dependent on application.
Technicians should whenever possible gain access to the test circuit without damage to seals and insulation. If this is not possible then make sure appropriate repairs are completed.
General connection advice
PicoScope offers a range of options within the test kits.
Dependent on difficulty of access, choose from:
Testing sensors and actuators (to include relevant circuit/connectors):
Warning: When attaching or removing secondary ignition pickups from damaged HT leads there is a danger of electric shock. To eliminate this possibility, switch off the ignition before attaching or removing the secondary igntion pickup.
You must disable the fuel system before carrying out this test.
This waveform shows a consistent signal pattern on Channel A as triggered against Channel B on the same time line. Cursor lines are added to show trigger reference (sparkplug 1) and show the time between trigger events. We can use this information to determine the approximate cranking speed of this engine.
Go to the drop-down menu bar at the lower left corner of the Waveform Library window and select, Exhaust / tailpipe pressure waveform.
This help topic is subject to changes without notification. The information within is carefully checked and considered to be correct. This information is an example of our investigations and findings and is not a definitive procedure. Pico Technology accepts no responsibility for inaccuracies. Each vehicle may be different and require unique test settings.
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