🔧 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

🔧 Tips to Prevent ECM Issues! 🔧 1️⃣ Power Probe Pitfalls: Use a power probe carefully to avoid injecting voltage or ground to the wrong pin. If unsure, stick to a reliable voltmeter. 2️⃣ Secure Battery Connections: Ensure tight terminals and no loose wires when charging batteries. Prevent excess voltage damage to your truck's system. 3️⃣ Beware of Power Washing: Avoid direct power washing on your ECM to prevent water damage. Protect your ECM's longevity. 👉 Follow me for more #ECMTips #ecm #ec