User´s Manual - I+ME ACTIA GmbH

Device Control
The purpose of the service Device Control ($AE) is to allow CAT to override normal output control
functions in order to verify proper operation of a component or system, or to reset/clear variables used
within normal control algorithms.
Manipulating predefined bits and/or bytes within a message, to indicate to the device which outputs or
control functions the tool wants to override, performs device control. The first data byte (after the
service identifier) of a device control request message is a Control Packet Identifier (CPID). The
remaining 5 bytes are used to provide output control information. However, it is not required that a
CPID contains 5 bytes of control information. CAT will send out only as many data bytes as defined.
CAT allows setup up to 10 CPIDs and the assigned CPID Control Bytes. Therefore the Setup button in
the Main Diagnostic Setup window could activate the dialog box shown below.
Note: This service should only be requested using physical addressing. See the Main Diagnostic
Setup window for details about addressing.
Request to known ECU
If there is an ECU addressed that is contained in the Database, the CPID Table contains the predefined
CPID and Control Data. But CAT allows modifying the existing entries. Put in the required CPID and
control bytes. Use the radio buttons to select the CPIDs that shall be requested. Acknowledge the
settings by OK.
Request to unknown ECU
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