539K views · 151 reactions | Diagnosing an engine problem requires that a person checks the spark plug wires, their vacuum lines, the car battery and more. Discover how to diagnose an engine problem without using expensive equipment with help from an auto mechanic in this free video on car repair and diagnostics. | Hie Five | Facebook

🔧 ECM Diagnostics: Method 2 🔧 Discover the second method to diagnose an ECM! Here's an example on a Detroit DDEC III 1️⃣ Connection: We hook the ECM to a bench harness for communication. 2️⃣ Diagnostic Codes: We used Detroit Diagnostic Link and found it has non-volatile memory failure and zero engine hours. 3️⃣ Result: This DDEC III ECM (12.7 Detroit) needs repair—100% confirmed! 🔍 Advanced Testing: I also manually check voltages and inspect signals in our lab for injector or sensor issues us

Learn about the most common trouble codes responsible for that dreaded check engine light. If you want to learn more about any of these OBD-II codes, you can watch all of our videos here: http://1aau.to/m/VideoLibrary | 1A Auto Parts