Спецы приезжают и уезжают, а Ниссан так и не заводится.

Summary

The video follows a mechanic's troubleshooting process for a Nissan Tiana with an engine that won't start. After initial diagnostics show no connection with the engine control unit, the mechanic inspects the vehicle's wiring, relays, and fuses. A blown fuse related to the engine control is replaced, but issues persist. Further inspection reveals a potential short circuit, with damaged wiring near the engine's throttle body. After isolating the faulty wiring and replacing a broken serpentine belt, the vehicle starts successfully, concluding the repair.

Takeaways

• 🔧 The video involves troubleshooting a 2010 Nissan Teana that had engine startup issues after remote start.
• 🚗 The owner faced communication issues with the car's control unit, and previous diagnostics were unsuccessful.
• 📋 The technician begins by checking the vehicle for basic symptoms, such as the ignition turning on and the fan immediately activating.
• 💡 The issue appears to involve a problem with either the ECU or the CAN bus communication line.
• 🔌 A key observation was that the ECU could not be detected, although other systems like ABS and transmission were functioning.
• 🔍 The technician decides to inspect the fuses and wiring, suspecting a potential short circuit or grounding issue.
• 🧰 Upon inspection, a blown fuse linked to the ignition coils and ECU was discovered, indicating a possible short in the circuit.
• 💥 The short circuit was traced to a damaged wire near the engine, where it was in contact with metal, causing the fuse to blow repeatedly.
• 🔄 After isolating and repairing the damaged wiring, the technician confirmed that the issue was resolved, and the engine could start.
• 🚘 The video ends with the successful repair of the vehicle, including replacing the belt and properly insulating the wires.

Q & A

What is the main issue with the Nissan Tiana mentioned in the script?

The main issue is that the car's engine does not start, and there seems to be a problem with the connection to the engine control unit.

What is the first step taken to diagnose the problem with the Nissan Tiana?

The first step is to connect a diagnostic tool to the car to check for any error codes, but the initial search did not yield any results.

Why do the car's fans turn on immediately when the ignition is switched on?

The immediate activation of the fans could indicate a malfunction in the system, but it is not similar to the behavior of an immobilizer, suggesting a different issue.

What is the possible reason for the engine control unit not being detected?

The possible reasons could be a wiring issue, a faulty relay, or a blown fuse that has caused the control unit to lose power.

What safety measures are taken when disconnecting the car's fans?

The fans are disconnected by carefully removing the relay to prevent any damage to the connectors and to ensure that the fans do not interfere with the diagnostic process.

What is the significance of checking the fuses related to the engine control unit?

Checking the fuses ensures that there is continuous power supply to the engine control unit, which is necessary for its operation and for the car to start.

What does the script suggest as a potential cause for the blown fuse?

The script suggests that a short circuit in the wiring or a malfunctioning component, such as a sensor or the engine control unit itself, could be the cause of the blown fuse.

Why is it necessary to isolate the wiring from the mass in the car?

Isolating the wiring from the mass is necessary to prevent a short circuit, which could cause further damage, such as blowing additional fuses or damaging the engine control unit.

What is the role of the engine control unit in the car's ignition system?

The engine control unit manages the ignition system by controlling the timing and duration of the spark plugs' operation, ensuring optimal engine performance.

What is the final solution proposed in the script to fix the car's starting issue?

The final solution involves replacing a damaged belt, isolating and repairing the wiring, and ensuring that there is no contact between the wiring and the car's mass, which was causing the fuse to blow.