Equus 3130 - Scan Tool – OBD2 - Manual (Page 37)

OBD2 35
E
The OBD2 Scan Tool is a special diagnostic tool that communicates
with the vehicle's computer. The Scan Tool lets you view and/or "cap-
ture" (record) "real-time" Live Data. This information includes values
(volts, rpm, temperature, speed etc.) and system status information
(open loop, closed loop, fuel system status, etc.) generated by the var-
ious vehicle sensors, switches and actuators.
In effect the Scan Tool lets you view, in "real time", the same signal val-
ues generated by the sensors, actuators, switches and/or vehicle sys-
tem status information used by the vehicle's computer when calculat-
ing and conducting system adjustments and corrections.
The real time (Live Data) vehicle operating information (values/status)
that the computer supplies to the Scan Tool for each sensor, actuator,
switch, etc. is called Parameter Identification (PID) Data.
Each PID (sensor, actuator switch, status, etc.) has a set of operating
characteristics and features (parameters) that serve to identify it. The
Scan Tool displays this information for each sensor, actuator, switch or
status that is supported by the vehicle under test.
WARNING: If the vehicle must be driven in order to perform
a troubleshooting procedure, ALWAYS have a second per-
son help you. One person should drive the vehicle while the
other person observes the Scan Tool data. Trying to drive and
operate the Scan Tool at the same time is dangerous, and
could cause a serious traffic accident.
VIEWING LIVE DATA
1. Follow steps 1 through 7 of the Code Retrieval Procedure (page 22)
to place the Scan Tool in "Code Retrieval" mode.
2. Press and release the ENTER/LD
button to place the Scan Tool in "Live
Data" mode.
3. Real-time Live Data (PID) information
supported by the vehicle under test dis-
plays.
Remember, what you are viewing is "real-time" Live Data.
The values (volts, rpm, temperature, vehicle speed, system
status etc) for the various PIDS displayed may change as the
vehicle's operating conditions change.
4. A vehicle usually supports several PIDs, however, only a limited
amount of PID data can be displayed on the screen at one time. If
additional PID data is available, a small arrow will be shown on the
display. Use the the UP
and DOWN buttons, as necessary,
to scroll up or down to view all available PID data.
Live Data Mode
VIEWING LIVE DATA