User manual

39
Data Parameters Long Parameter Names
ENGINE COOLANT
TEMPERATURE
Shows the temperature as measured by either the engine coolant
temperature sensor or the cylinder head temperature sensor. If
neither of these sensors are available, the engine oil temperature
may be shown instead.
ENGINE RUN WITH MIL
ACTIVE
Conditions for this counter:
1. Resets to zero when MIL state changes from deactivated to
activated by this ECM.
2. Accumulates counts in minutes if MIL is activated (ON)
3. Does not change value while MIL is not activated (OFF)
4. Resets to zero if diagnostic information is cleared either by
service $04 or 40 warm-up cycles without MIL activated
5. Does not wrap to zero if value is maximum (65535).
ENGINE SPEED Engine speed as calculated by the ECM, based on various signals.
EQUIVALENCE RATIO Bx-Sy
Status of the oxygen sensor in V or as a ratio. Designed for linear
or wide-ratio oxygen sensors.
See also PID $14 and up or $34 and up.
EVAP SYSTEM VAPOR
PRESSURE
Evaporative system vapor pressure, if used by the control module.
Can be obtained from a fuel pressure sensor in the tank or in the
evaporative system vapor line.
FUEL LEVEL INPUT
Shows the nominal fuel tank liquid fill capacity. For gaseous fuels
the percentage of usable fuel capacity is shown. May either be
obtained directly from a dedicated sensor, or calculated by the
ECM based on other sensor signals.
FUEL PRESSURE GAUGE
Shows the fuel rail pressure at the engine relative to the
atmosphere (gauge pressure).
FUEL SYSTEM x
Fuel System 'x' does not normally refer to injector banks. It is
intended to represent different fuel systems (for multi-fuel vehicles)
that can independently enter and exit 'Closed Loop'. 'Closed Loop'
means the fuel control system uses the oxygen sensor signal.
Banks of injectors on a V engine are generally not independent
and use the same closed loop criteria.
IGNITION TIMING ADVANCE
Ignition timing spark advance for cylinder #1. If timing is retarded,
the value will be negative.
INTAKE AIR TEMPERATURE
Shows the intake manifold air temperature as obtained from a
sensor or as calculated by the ECM (using other inputs).
INTAKE MAP
Shows the absolute pressure in the intake manifold as measured
by the MAP sensor.
LONG TERM FUEL TRIM
BANK x
Shows the correction used by the Closed Loop and Open Loop
fuel algorithm at the moment this parameter is requested. Negative
values indicate a 'lean' condition, positive values a 'rich' condition.
0% correction will be shown if no correction is used in Open Loop.
NR OF WARM-UPS SINCE
DTCs CLEARED
A warm-up cycle is valid if the coolant temperature rises, after
starting the engine, at least 22 °C/40 °F and reaches at least 70
°C/160 °F (60 °C/140 °F for Diesel engines). The maximum
number is 255. To set to 0, reset all DTCs.
O2S BANK x, SENSOR y
Shows the presence of oxygen sensor number 'y' per bank 'x'
(group of cylinders). Sensor 1 is closest to the engine
Table 6-1 Long parameter names (sheet 3 of 4)
Parameter Description for long parameter