MICROSCAN User Manual - Snap-on

Data Parameters Long Parameter Names
6.1.1 Short Parameter Names
Table 6-2 lists data parameter definitions alphabetically by their abbreviated name. As there is
less display space available on the screen in graphing mode, short parameter names display.
NOTE:
i Counters (like cylinder bank or sensor position) in a parameter name are represented by a ‘y’ or
‘x’ in the table.
The vehicle ECM determines the parameter data list, not all parameters display on every vehicle.
Table 6-2 Short parameter names (sheet 1 of 4)
Parameter Description for short parameter
AAT
Can be obtained from an AAT sensor directly or deducted by the
ECM from other sensor signals.
AIR_STAT
APP_x
BARO
CATEMPx/y
CLR_DIST
CLR_TIME
ECT
ECT_ERR
ECT_PCT
EQ_RAT
Shows the position of the Secondary Air system (upstream or
downstream of the first catalytic converter) and/or its status.
Shows the absolute pedal position. The output signal is a
proportional percentage to the input voltage (when proportional) or
100% minus the proportional percentage (when inversely
proportional).
Can be obtained from a BARO or MAP sensor directly or deducted
by the ECM from other sensor (MAF) signals. If the value at
'ignition key on' and certain driving conditions is stored into a
memory, clearing the memory may lead to inaccurate BARO
values.
Shows the catalyst substrate temperature for the mentioned bank
or the temperature of the mentioned bank and oxygen sensor. Can
be obtained from a sensor directly or deducted by the ECM from
other sensor signals.
Accumulated distance since the DTCs were cleared. The
maximum number is 65535. To set to 0, reset all DTCs
Accumulated time since the DTCs were cleared. The maximum
number is 65535. To set to 0, reset all DTCs
Shows the temperature as measured by either the engine coolant
temperature sensor or the cylinder head temperature sensor. If
these sensors are not available, the engine oil temperature may be
shown instead.
The Exhaust Gas Recirculation system control and feedback
devices differ, therefore no 'actual' or 'commanded' status can be
shown. The value is (actual EGR - commanded EGR),
commanded EGR. Example; (5%-10%)/10%=-50%
Shows the status of the Exhaust Gas Recirculation system
between 0% (no flow) and 100% (max. flow, max. duty cycle)
Shows the Air/Fuel ratio as commanded by the ECM. To obtain the
actual Air/Fuel ratio, multiply the stoichiometric Air/Fuel ratio by the
equivalence ratio. Conventional oxygen sensors shows the ration
when in Open Loop only. In Closed Loop '1.0' is shown. Wide
range or linear oxygen sensors show the ratio in Open Loop and
Closed Loop.
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