@magivibeke: BUT WHAT HAPPENS WHEN IT FAILS? 🔧 Modern vehicles use a CAN Bus network to allow different electronic control units (ECUs) to communicate. When this network develops a fault, you may experience warning lights, communication errors, or multiple diagnostic trouble codes. Here are 4 ways to troubleshoot CAN Bus communication problems using a digital multimeter: 1️⃣ CAN-H & CAN-L Voltage Test: Check the voltage on both communication lines and look for abnormal readings. 2️⃣ CAN Bus Resistance Test: With the network powered OFF, measure between OBD2 pins 6 and 14. Approximately 60Ω is typical for many properly terminated high-speed CAN networks. 3️⃣ Short Circuit Test: Check for unwanted shorts between CAN-H, CAN-L, ground and power, following the manufacturer's testing procedure. 4️⃣ Wiring & Connector Inspection: Check for broken wires, corrosion, loose terminals and damaged connectors. ⚠️ TECH TIP: Never measure resistance on a powered circuit. Always consult the vehicle's wiring diagram because CAN Bus configurations and readings can vary. 💡 Understanding electrical communication is a major step towards becoming a better automotive diagnostician. 💬 CHALLENGE: If your scanner displays "NO COMMUNICATION WITH ECU", which CAN Bus test would you perform FIRST? Follow @VincentAutoTech for more practical automotive electrical, electronics and diagnostic knowledge. 🚗🔧 #CANBus #OBD2 #CarDiagnostics #AutoElectrician #AutomotiveTechnology

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Monday 09 November 2026 19:23:02 GMT