Online Demo / Manual
to VAG 1551/1552 function 03
Output Tests function is used to test a Control Module's
Electrical Outputs (and the wiring that connects it to the
Output Tests under KWP-2000
includes simultaneous measuring data when available from the
control module in question.
Output Tests, and to progress through each step, click
[Start/Next]. In some cases an
[Activate] button will appear, depending on the specifics of
the control module.
Outputs that can be tested and the sequence in which they
become active are controlled strictly by the Control
Module; this is not a function of the Diagnostic Tester.
To find out which Outputs can be tested and the sequence
in which they will become active, please refer to
the Factory Repair Manual for your car.
Test Sequence once it has been started, clicking
Back] will take you back to the Open Controller
Function Screen. The Test Sequence will still be
Most Control Modules will
permit the Output Test Sequence to be run only one time
per session. If you run the Test Sequence to completion,
VCDS will allow you to return to the previous screen
without closing the session, but you may not be able to
run the Output Test Sequence again. If you need to run
the Sequence again, manually Close the Controller and
re-start the session. On some cars, you must cycle the key
OFF and ON or even start the engine (to clear the
cylinders of fuel).
Output Tests require additional action before they become
active. Fuel Injectors are a common example. To activate
a Fuel Injector, you must press (and in some cases
release) the gas pedal. Exact details can be found in
your Factory Repair Manual.
systems, the Output Tests function is only available when
the Engine is not running.
It is perfectly normal to see
a "short to ground" message in the process of running
Output Tests. The ECU identifies which output it is
currently testing by sending a fault-code number. On many
ECUs the full text for this fault code includes "short to
ground". Why? Because one side of the actuator in question
has 12V on it all the time and the ECU completes the
circuit (and turns the actuator on) by pulling the other
side to ground.
use the Output Tests function on any system while the car
is in motion! Running Output Tests on the ABS brake
system can temporarily disable the brakes entirely and
cause individual wheels to lock and unlock.
strongly suggest you refer to the Factory Repair Manual
for your specific car before running Output Tests on
any Control Module so you will know what to expect!
try to perform Output Tests on an Airbag controller, a
warning will pop up. For example, in the VW Touareg, a
specific procedure must be performed to be able to start
the vehicle if Output Tests on the Airbag Controller have
[Done, Go Back] to return to the Controller Info / Select
Online Demo / Manual