Porsche PIWIS Tester III, Service Training, Page: 79 / 103

CHAPTER1
PIWIS Tester III (PT3)
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11.2.4 Drive links/checks
The drive link test allows selected components and actuators to be activated via PT3
and their function tested. The driver of the respective control unit sends a signal to the
appropriate actuator. The function can be checked either acoustically or visually when
the electric circuit between the control unit and actuator is closed via the driver. The
‚Drive links/checks‛ function group can be selected in the menu bar after the control
units are selected. There are major differences compared with PIWIS Tester II when it
comes to activating the drive links. A value is displayed in the status bar for activating
the drive links; this value can be changed using the scroll bar. 100% corresponds to the
maximum value that the driver can output. In the example above, 100% corresponds
to a ‚PWM signal‛ (Pulse Width Modulated), the minus sign above the driver switches to
the corresponding relay and activates the component. Once the value has been set to
100%, the function is started using the F8 button. The drive link is activated when the
electric circuit closes. An acoustic check can take place.
The function is terminated by setting the value 0% in the status bar and starting
the function using the F8 button. The minus sign above the control unit’s driver is
disabled again.
All previously configured settings are
disabled following a change in potential
(ignition off - ignition on).
Data logger actual values/input signals
Start and stop data logging for the selected values by pressing [F8].
Overview
Extended
identifications Fault memory Actual values
input signals Drive links
checks Maintenance
repairs Coding/
program