Scope & Pinpoint
Your scope is one of the most powerful diagnostic tools in the shop. But it’s only as good as your ability to read what it’s telling you. Our built-in library gives you known-good waveforms to compare against — so you know what right looks like.
Diagnostic Categories
Each category contains known-good waveforms, test procedures, and real-world examples. Click a category to explore.
Baseline Testing
Relative Compression (RC) and Volumetric Efficiency (VE). The first test you should run on any engine performance concern. Establishes whether the engine can do its job.
Explore →Cam/Crank Correlation
CKP and CMP signal analysis. Verify timing relationships, detect stretched chains, jumped timing, and sensor issues. The heartbeat of the engine.
Explore →In-Cylinder Analysis
Pressure transducer testing — cranking and running compression waveforms. See valve events, combustion, and mechanical issues that a gauge can't show you.
Explore →CAN Bus & Communication
Network communication testing. Verify CAN High/Low signals, check for open circuits, shorts, and module communication failures.
Explore →Electrical Draw
Parasitic draw testing and current analysis. Find what's draining the battery using amp clamp patterns and sleep mode monitoring.
Explore →Amp Probe Testing
Current ramp testing for fuel pumps, injectors, ignition coils, starters, and more. Non-invasive testing that tells you what's happening inside components.
Explore →Misc Testing
Additional scope patterns, sensor testing, and reference waveforms that don't fit neatly into one category but are still essential knowledge.
Explore →Why Scope Testing Matters
A scan tool tells you what the computer thinks is wrong. A scope shows you what's actually happening. It's the difference between guessing and proving.
Test Before You Replace
Scope testing proves the failure before you pull parts. Fewer comebacks, more profit.
Know What Right Looks Like
You can't spot a bad waveform if you've never seen a good one. This library fixes that.
Build Confidence
Every waveform you study makes the next diagnosis faster. This is how you level up.
Full Library in the App
DiagFlow includes the complete scope waveform library — with known-good references, annotations, and notes from the field. All accessible from your phone or tablet.
Get DiagFlow →
DiagFlow.org 