User Manual Galileosky Base Block
27
J1979_CHECK_PIDS Mode
The mode allows to search for 11 bit and 29bit identifiers of J1979 protocol automatically.
The tracker sends requests to identifiers in the range 1…255, first to 11bit, then to 29bit in the
same range. Identifiers that respond, will be displayed in diagnostics “CAN detailed”. After
scanning, CAN will be transferred to “CAN disabled” mode.
The order of procedures in this mode:
1)
Connect the tracking device to CAN-interface of a vehicle.
2)
Send CanRegime command (
CAN settings
) with parameter Mode=8. In 5 seconds, the
tracking device will start searching for identifiers.
3)
Go to tab “Troubleshooting” and tick “CAN detailed” parameter to display the process
of searching. In case the parameter is not ticked or you go to another tab while scanning,
data will not be saved.
4)
«CAN mode: J1979. Searching PIDs...» message means that searching has started.
5)
«CAN mode: J1979. Checking 11bit PIDs …» message displays the results of search for
11bit identifiers. The tracker will report on the current scanning process. In case of
response by one of the identifiers, the message will be displayed.
6)
«CAN mode: J1979. Checking 29bit PIDs …» message displays the results of search for
29bit identifiers. The process is similar to the previous point.
7)
«CAN mode: J1979. Search is finished» message means that the search is completed.
CAN will automatically be transferred to the mode “CAN disabled”.
ATTENTION!
Many manufacturers of vehicles partially support J1979 protocol or do not
support it at all.
ATTENTION!
Activation of the mode in the vehicles with no support of J1979 protocol may
lead to a failure in operation of onboard equipment. RSA “Galileosky”, LLC bears no
responsibility for failures after activation of these modes.
Different options of connection to the CAN-bus
1.
Direct connection.
ATTENTION!
If the terminating resistor (is shown with a dotted line in the diagram) is not
installed on the vehicle side, it should be installed. Its presence can be checked with the help
of a multimeter: it is necessary to measure the resistance between CAN_H and CAN_L when
the vehicle electronics is off. If the resistance is about 60 Ohm, there is no need for a terminating
resistor. If the resistance is 120 Ohm, it is necessary to connect a standard 120 Ohm resistor
between the CAN_H and CAN_L wires.
To plug the tracker into the
troubleshooting socket it is
necessary to use the first
connection variant.
The second variant is
recommended only for use
to connect the tracker
directly to the vehicle’s
CAN-bus.