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© 200438 2-1 System inspection with DAVIE XD ABS-D AND ABS/ASR-E DAVIE XD diagnostics manual 10 2. SYSTEM INSPECTION WITH DAVIE XD 2.1 GENERAL If DAVIE is being used to communicate with the ABS/ASR electronic unit, the following points need to be taken into account: If ABS valve failures occur while driving, the fault lamp will go out after switching the vehicle ignition off and on if the fault is no longer active. Should faults occur with the wheel speed sensors while driving, switch the vehicle ignition off and on; the fault lamp should then remain on if the fault is no longer present. The fault lamp will not go out until the vehicle has reached a speed of at least 7 km/h. If DAVIE XD has been used to erase faults from the memory of the electronic unit, the fault lamp will go out when the vehicle has reached a speed of at least 7 km/h. In some "direct test" functions, it is possible to drive the vehicle while communications are taking place between DAVIE XD and the ABS/ASR unit. With the remaining "direct test" functions, communications between DAVIE XD and the electronic unit will be interrupted. If a new ABS/ASR electronic unit is fitted, the unit will "recognise" whether the vehicle has an ASR system when the vehicle ignition is switched on. If an electronic unit is subsequently fitted in a vehicle that does not have an ASR system, the unit will always output ASR error messages. Whenever an ABS/ASR electronic unit is replaced, it is therefore important to reset the unit using DAVIE/XD. |