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#Linbus Reel by @ecu_testing_ltd - 🚗 💨 Low voltage MAP sensor fault codes such as P0107 often appear in conjunction with rough running, poor performance and even worse fuel economy. ⚡
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@ecu_testing_ltd
🚗 💨 Low voltage MAP sensor fault codes such as P0107 often appear in conjunction with rough running, poor performance and even worse fuel economy. ⚡ Learn how to test your vehicle's circuits to diagnose the issue. 🎥 Full video link in bio. #mapsensor #ecutesting #autoelectrical #diagnostic
#Linbus Reel by @strike_automotivehub - The Heartbeat of Data: Decoding CAN-Bus Waveforms 🌐⚡ In the previous episodes, we diagnosed sensors and mechanical leaks. But what happens when the
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@strike_automotivehub
The Heartbeat of Data: Decoding CAN-Bus Waveforms 🌐⚡ In the previous episodes, we diagnosed sensors and mechanical leaks. But what happens when the ECUs themselves stop talking? When you see a “U-Code” (Network Communication Code), most people reach for a multimeter. That is a mistake. A multimeter only shows you the average voltage. To see the “truth” of the network, you need a Lab Scope. 🔍 The Anatomy of a CAN Waveform: CAN-Bus operates on two wires: CAN-High and CAN-Low. They are mirrors of each other. 1. Recessive State (Idle): Both wires sit at 2.5V. The network is quiet. 2. Dominant State (Data): * CAN-High jumps to 3.5V. • CAN-Low drops to 1.5V. • The difference is exactly 2V. This is the “1” or “0” the ECU reads. 🔍 What a Scope Reveals (The Red Flags): • Reflections: Squiggly lines at the edge of the square wave? That’s a signal “echo” caused by a missing Terminating Resistor. • Short to Ground: If CAN-Low is a flat line at 0V, the whole “conversation” stops. • Common Mode Noise: If the wires aren’t twisted properly, electromagnetic interference (EMI) from the ignition system can “pollute” the data. ⚙️ Engineering Insight: A Diagnostic Engineer doesn’t just check if the network is “alive.” We check for Signal Integrity. If the square waves are rounded, or if the voltages are “floating” due to a bad ground, the ECU might receive the data but it will be corrupted. This leads to “Intermittent Ghost Faults” that drive technicians crazy. Rule of Thumb: If it’s a communication issue, don’t trust the numbers—trust the Waveform. 🧠 Becoming a Diagnostic Engineer – Series In the next episode, we will tackle: “Sensor Fusion: How the ABS, Steering, and Engine ECUs work together for Stability Control.” Have you ever found a “CAN-Bus short” caused by a liquid spill or a crushed wire? Tell us your most complex network diagnostic story below! 🤝 #CANBus #Oscilloscope #Diagnostics #Mechatronics #AutomotiveEngineering DiagnosticEngineer DataIntegrity SignalProcessing
#Linbus Reel by @romeroengineeringco - Transmission line current differential protection operates on the same principle as bus and transformer differential schemes. In this example, a defi
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@romeroengineeringco
Transmission line current differential protection operates on the same principle as bus and transformer differential schemes. In this example, a defined zone of protection is established for the transmission line, and currents are measured at both terminals. The relay compares the current measured at Substation T_Sub1 with the current measured at Substation T_Sub2 to determine whether there is a discrepancy. Any significant difference between these currents indicates an internal fault within the protected zone. #LineDifferential #CurrentDifferential #ProtectiveRelays #TransmissionProtection #PowerSystemProtection #SEL411L #RelayProtection #ElectricalEngineering
#Linbus Reel by @romeroengineeringco - Unlike bus or transformer differential schemes, transmission line differential protection involves relays that are physically far apart. Because the
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@romeroengineeringco
Unlike bus or transformer differential schemes, transmission line differential protection involves relays that are physically far apart. Because the terminals of a transmission line can be separated by long distances, the current comparison cannot be done using CT wiring alone. Instead, a relay is installed at each end of the line, and the measured current information is communicated between the two relays. This communication allows the relays to compare currents and determine whether a fault is inside or outside the protected zone. #LineDifferential #CurrentDifferential #TransmissionProtection #ProtectiveRelays #RelayCommunication #PowerSystemProtection #SEL411L #ElectricalEngineering
#Linbus Reel by @support1653 - Stop guessing. Just plug it in. With the P350 Automotive Circuit Tester, you can quickly check voltage, continuity, polarity, and ground - all in one
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@support1653
Stop guessing. Just plug it in. With the P350 Automotive Circuit Tester, you can quickly check voltage, continuity, polarity, and ground — all in one tool. Faster diagnostics. Fewer mistakes. Real results. #automotivetools #circuitdiagnostic #autoelectrical #mechaniclife #p350 #garagelife #cardiagnostics
#Linbus Reel by @strike_automotivehub - Seeing the Invisible: Why the Multimeter is Lying to You 📉🚫 In the last post, we talked about Voltage Drop. Today, we go deeper. If the Multimeter
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@strike_automotivehub
Seeing the Invisible: Why the Multimeter is Lying to You 📉🚫 In the last post, we talked about Voltage Drop. Today, we go deeper. If the Multimeter is a “Snapshot,” the Oscilloscope is a “Movie.” Many technicians rely solely on a Digital Multimeter (DMM). But in modern automotive networks, a DMM is often too slow to see the truth. 🔍 The “Aliasing” Trap: Your multimeter averages the voltage it sees. If a signal is toggling between 0V and 5V at high frequency, your meter might show a steady 2.5V. • The Meter says: Everything is fine. • The Reality: The signal is a mess of noise and glitches that the ECU cannot decode. 🔍 Why you need a Scope (Lab Scope Basics): 1. Speed (Sampling Rate): Critical signals like Crankshaft (CKP) or CAN-Bus data happen in microseconds. Only a scope can capture these “high-speed” events. 2. Visualizing Noise: A bad alternator diode can leak AC ripple into the DC system. You won’t see it on a meter, but it will “confuse” every ECU on the network. 3. Pattern Recognition: A Diagnostic Engineer looks for a “Signature.” A rounded square wave or a missing tooth on a reluctor wheel is a physical problem disguised as an electrical one. ⚙️ Engineering Insight: The Multimeter tells you if the circuit is “Alive.” The Oscilloscope tells you if the circuit is “Healthy.” In Mechatronics, we don’t just care about the presence of voltage; we care about the integrity of the waveform. If you can’t see the signal, you are just guessing. 🧠 Becoming a Diagnostic Engineer – Series In the next episode, we will explore: “Fuel Trim Secrets: How the ECU compensates for mechanical air leaks.” Are you a “Scope User” or do you still trust your Multimeter for everything? Let’s discuss the most “hidden” glitch you’ve ever found! 🤝 #Diagnostics #Oscilloscope #LabScope #AutomotiveEngineering #Mechatronics SignalProcessing DiagnosticEngineer
#Linbus Reel by @romeroengineeringco - Directional control for overcurrent elements is set directly in the relay settings. In this example, the ground inverse time overcurrent element is e
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@romeroengineeringco
Directional control for overcurrent elements is set directly in the relay settings. In this example, the ground inverse time overcurrent element is enabled and the DIR1 setting is set to Forward. This tells the relay to apply the Level 1 overcurrent elements only for faults in the forward direction, which in this case is toward the transmission line. If DIR1 were set to Reverse instead, the relay would operate only for faults on the substation bus side. #DirectionalControl #OvercurrentProtection #SELRelays #RelaySettings #PowerSystemProtection #GroundFaultProtection #TransmissionProtection #ElectricalEngineering
#Linbus Reel by @riagnostics (verified account) - 5 Volt Reference Circuits in 60 Seconds (or close enough)! #automotivediagnostics #mechanic #europeancars #electricaldiagnostics #diag #5voltreference
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@riagnostics
5 Volt Reference Circuits in 60 Seconds (or close enough)! #automotivediagnostics #mechanic #europeancars #electricaldiagnostics #diag #5voltreference
#Linbus Reel by @riagnostics (verified account) - Understanding your circuit is the key to success. #automotivediag #electricaldiag #mechanic
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@riagnostics
Understanding your circuit is the key to success. #automotivediag #electricaldiag #mechanic
#Linbus Reel by @romeroengineeringco - Transmission line differential protection relies on comparing currents at both ends of the line, which requires communication between relays due to th
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@romeroengineeringco
Transmission line differential protection relies on comparing currents at both ends of the line, which requires communication between relays due to the physical distance. In this example, the transmission line is several miles long, making it impractical to connect CTs to a single relay. When a three-phase fault is placed external to the protected line at Substation T_Sub2, the current entering the line at one terminal is equal to the current leaving at the other terminal. Since the currents at both terminals match, the relay identifies this condition as a through fault, which is outside the protected zone. #LineDifferential #ThroughFault #TransmissionProtection #ProtectiveRelays #PowerSystemProtection #SEL411L #RelayProtection #ElectricalEngineering

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