Operator`s manual

DIAGNOSTIC TOOLSET DESCRIPTION 21
INSTRUMENTATION PORT AND DEVICES
The Instrumentation Port (I/P) is used to connect the Tester to one or more
instrumentation devices which are used to expand the diagnostic capability of the
Tester. The I/P connector receives signals which provide a serial communication
link from “smart” instrumentation devices. These devices contain microprocessors
which can perform specific diagnostic functions and send information to the
Tester.
The Instrumentation Port also contains circuits which can be used for making
direct signal measurements. This capability is used to support instrumentation
devices which may not require a microprocessor. The Autoprobe and NVH
Analyzer are examples of this type of instrumentation devices.
AUTOPROBE
The Autoprobe provides a convenient means of signal measurement and
operates under control of the Tester.
In the signal measurement mode, the Autoprobe functions as a digital volt meter
(DVM) and is used to passively monitor voltage signals from the ECU, sensors,
actuators, harness, and connectors.
The Autoprobe is also used for signal input to the oscilloscope, as well as timing
(frequency, duty cycle, pulse width) measurements on vehicle signals.
INSTRUMENTATION
PORT
INSTRUMENTATION PORT
NOTE
The Autoprobe (DVM) provided in the Tester kit is only
intended for automotive type signal measurement. It is
not a lab-quality Digital Volt Ohm Meter (DVOM).
AUTOPROBE