📌 [Case Introduction]
The owner of the Mazda 3 lost all the keys, and the vehicle had been parked for several months. The diagnostic equipment couldn't communicate. During on-site inspection, it was found that the fuses were burnt out. After repairing the fuses, the key matching was completed, and the vehicle was successfully started.
📌 [Operation Steps]
1️⃣ Use a multimeter to measure the voltage of the power supply, ground, and communication lines of the OBD interface to confirm that they are normal.
2️⃣ Open the fuse box in the engine compartment, check the relevant fuses, and find that 3 fuses are burnt out.
3️⃣ Use a voltage tester to check and confirm the damage, and promptly replace the damaged fuses with new ones of the same specification.
4️⃣ Reconnect the diagnostic instrument and successfully read the vehicle information and the number of keys.
5️⃣ Select the key matching function, add new keys. After the matching is completed, the anti-theft light goes out.
6️⃣ Try to start the vehicle and confirm that it starts normally, and the fault is eliminated.
📌 [Applicable Scenarios]
Suitable for situations where all Mazda keys are lost, the OBD cannot communicate, the diagnostic interface doesn't respond, the vehicle has been parked for a long time, and the inability to match keys is caused by blown fuses, etc.
#Mazda Key Matching #All Car Keys Lost #No OBD Communication #Fuse Detection #Locksmith's Practical Operation #Key Programming #Vehicle Anti-theft #Automotive Maintenance Teaching