Symptom: a 2008 production of FAW - Volkswagen Maiteng sedan, assembly 1.8TSI direct injection engine and 09G hand / self-transmission, mileage of 9000km. The customer reflects the redness of the dashboard in the dashboard that has been flashing and has a text prompt for the electronic steering column lock failure. After the car because of a similar failure to my station maintenance, when the maintenance staff is only as a minor fault after the accident code cleared, but a few days after the fault to reproduce.
    Check the analysis: the fault in the dashboard when the lights did not shine, obviously this is an occasional fault. At this point can only rely on the control unit to fault the storage function to diagnose. Connect the fault diagnosis instrument V.A.G5052 access to the system of the fault code, in the anti-theft system control unit 25 found in the accidental fault code 02823 (steering column lock lock requirements are not met).
    For the fault code, the process of locking the electronic steering column lock of Maxtor sedan is analyzed. The MAGOTAN car is equipped with the 4th generation of the anti-theft device, the steering column lock and the steering column lock control unit J764 are integrated together on the steering column. When the ignition switch is closed and the key is removed, the ignition switch E415 transmits the S contact off signal and the P contact ON signal to the steering column control unit J527. The J527 converts the S / P contact signal into a steering lock lock request signal via a single wire and passes it to the electronic steering lock lock control unit J764 to activate the steering column lock. At the same time, J527 through the gateway J533 another lock signal to J764 as a steering column lock to confirm the signal. The gateway is mainly based on the vehicle speed signal to calculate the lock confirmation signal. As long as the speed is not zero, ABS control unit J104 will pass the speed signal to the gateway, so the electronic steering column lock is still not locked, even in the 15 line off, the power bus in the "sleep" state, the speed signal Can still be passed to the gateway because there is a wake-up line between the ABS control unit and the comfort system control unit J393 (internal integrated alarm control unit), only when the lock signal of the gateway J533 and the lock of the steering column control unit J527 Only the request signal is transmitted to the electronic steering column lock control unit J764, the electronic steering column lock was activated.