CSS SCRIPT

The CSS script allows us to identify which cylinders are misfiring or have decreased power contribution as well as the reason for the problem. The script does not rely on the capabilities of the scanner or the onboard diagnostic system and is able to provide more information to analyze the cause of the problem. The script works by analyzing the power contribution from each cylinder during engine operation in different modes.

The CSS script can determine exactly which cylinder is less efficient than the others and what type of problem the cylinder has. The script will determine if the problem is in the mechanical part of the engine, the fuel system or the ignition system.

This test allows you to:

• Evaluate static and dynamic compression for each cylinder
• Identify ignition system faults
• Assess fuel injector condition
• Define the characteristics of the ignition timing subsystem
• Determine crankshaft reluctor profile, damage, and/or run out
• Check and verify the operation of a VVT, VVT-i, Dual VVT system

Signal recording order

• The black synchronization probe is used for identifying when spark occurs for cylinder #1
• To obtain the crankshaft position sensor signal it is necessary to use a test lead. You can use a needle probe to make it easier, if necessary
• Start the USB Oscilloscope program and select the "CSS" mode
• Start the engine and leaving it idling
• Select record and after a few seconds slowly raise the engine speed to 3'000 RPM
• Let off on the throttle and wait until the engine returns to idle. Then abruptly open the throttle
• When the engine has achieved 3'000 RPM, turn off the ignition, but leave the throttle open
• Wait until the engine has completely stopped turning and stop the recording
• Next you will need to analyze the recorded waveform

Documentation

	CSS script – Manual
	CSS script – Сase studies
	CSS script – Frequently Asked Questions
	CSS script – Common errors
	CSS script – Difficult Diagnostics: A Rough Running Toyota
	CSS script – Diagnosing a Common Rail Diesel Engine
	CSS script – Troubleshooting Complex Systems
	CSS script – Phase Tab
	CSS script – Engine Dentistry

Waveform examples

	The USB Oscilloscope program is required for waveform playback
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	CSS diesel - OK - Peugeot Boxer 2012 2.2 HDi E5
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	CSS diesel - bent connecting rod - Opel Vivaro 2.5dCi, engine hot
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	CSS diesel - Injector washer seal OK - Mercedes Vito 112CDI