Failure phenomenon: a 2007 annual POLO strong feelings 1.6 L hatchback, mileage 46000 km. Users can not reflect the car original car three-button remote control to open the trunk lid can only be opened by mechanical key.
FIG 1
Check Analysis: author first fault verification, all doors closed, press the remote control button to unlock the luggage compartment, the steering can be seen light flashes, this time pulling the tailgate handle, unlocking the motor no response, the luggage compartment can not be opened. A fault diagnostic to detect faults, into the central gateway controlling unit 09, stores found E234 (tailgate handle switch) signal is not reliable fault record. With reference to a circuit diagram related to the luggage compartment lock (FIG. 1), see relevant element comprising: a tailgate handle switch E234 (inside tailgate handles, used to determine whether the handle is pulled out), the state of the switch cylinder F218 (installation at the rear end of the lock cylinder, to determine the state in which the key cylinder), the luggage compartment lock motor V53 (FIG. 2) and the luggage compartment lighting switch F5.
FIG. 2
to open the car control theory analysis below a luggage compartment. The car can be opened manually and remotely luggage compartment, is manually rotated by a key cylinder, whereby the luggage compartment lock open; remotely unlocking the luggage compartment so that the remote control is not working directly through the motor triple bond remote control to open the luggage compartment but after the driver operates the remote control button to open the luggage compartment, the system sends a signal to the comfort control unit, a signal transmitted through the data bus to the amenity system onboard network control unit J519, J519 allow the vehicle to pull decklid within a predetermined period of time the operation of the handle to the reaction, i.e. the trunk lock the drive motor to open the deck lid, if the time is still not exceed the limit of operation, i.e. the luggage compartment lock switch state without any change, the luggage compartment will enter a locked state again.
According to the above analysis, the author for each specific switching state is detected, was found in the case of tailgate of the handle and not opened, but the switch is in the off state, it is determined that the tailgate handle always J519 opened in the state. A close look and found that fixed the tailgate handle two screws too loose, I suspect this is the cause the remote control to openThe reason lock failure.
Troubleshooting: fixing the tailgate handle two screws, at this time the switch is depressed inside handle is turned, try to use the remote control to open the deck lid again, found that normal function.
reviewed: Repair of such failures as likely to commit mistakes.
(1) the vehicle luggage compartment and the control system circuit Passat B5 luggage compartment easily control circuit confusion. Passat comfortable by the system control unit directly start unlocking the luggage compartment of the motor vehicle and receives a switching signal and a starter motor is unlocked central network control unit J519.
(2) is generally considered when the maintenance personnel operates the remote controller, the motor will unlock operation, in fact, open the trunk by pressing the unlock button, only to comfort the system control unit allows a signal to open the door.
(LI Jun-hui)