What to do if the Besturn X80 fails to start due to vehicle authentication failure?
3 Answers
The reasons why the Besturn X80 fails to start due to vehicle authentication failure are as follows: 1. The key may be out of battery, try replacing the remote control battery. 2. The one-button start function may be malfunctioning. 3. There may be a fault in the body control module or circuit. It is recommended to contact the local 4S store for inspection and repair. The following are the inspection steps for vehicle authentication failure and failure to start: 1. Determine whether the anti-theft system is locked. 2. Determine whether the starting system is working (whether the starter is running). 3. If the starting system is normal, check whether the ignition system is normal; if the starting system is abnormal and turns slowly, check the battery voltage, whether the starter has a fault, and whether the engine has excessive resistance; if the starter does not run, check the starter's circuit and electromagnetic switch. 4. If the ignition system is normal, check whether the fuel supply system is normal. If the ignition system is abnormal, check the ignition system's circuit, check whether the crankshaft position sensor and camshaft position sensor are normal, and check the ECU's power supply and grounding.
My Besturn X80 had the same issue last week – the authentication failure preventing ignition was really frustrating. Through trial and error, I found such problems are mostly related to the smart key system: when the key battery is low, the weak signal makes the car fail to recognize it; or there might be strong electromagnetic interference nearby, like signal towers in parking lots or power banks. In such cases, I first place the spare key in the cup holder induction area for emergency start, then drive to the repair shop for inspection. The mechanic mentioned that Besturn's anti-theft system is particularly sensitive, and sometimes poor contact with the key chip can also cause it to fail. After connecting to the computer to read the fault code, he found an abnormal voltage in the anti-theft module, and the issue was resolved by re-matching the system. Remember to replace the key battery regularly and avoid keeping the key and phone together.
I've been driving the Besturn X80 for over three years and encountered certification failure issues twice. The first time was during rainy weather when the key got wet, causing a short circuit in the chip and leading to recognition abnormalities. The second instance was even more frustrating - while installing a dash cam, a fuse blew, which incidentally affected the certification system. Here's my advice: first try basic troubleshooting steps like removing the key battery for five minutes to reset the system, or using the mechanical key to open the door and start the ignition. If that doesn't work, investigate three potential causes: key battery power (replace if voltage tests below 2.7V), signal interference (try moving electronic devices away), or wiring faults (pay special attention to loose wiring harnesses under the steering wheel). If you can't resolve it yourself, don't hesitate - dealerships have specialized equipment to forcibly disable the anti-theft mode.
