6E-46 Engine Control System (4HK1)
Intake Air Temperature
This parameter displays the temperature of the intake
air as calculated by the ECM using the signal from the
intake air temperature (IAT) sensor. The Tech 2 will
display a low temperature when the IAT sensor signal
voltage is high, and a high temperature when the IAT
sensor signal voltage is low.
Fuel Temperature Sensor
This parameter displays the voltage signal sent to the
ECM from the fuel temperature (FT) sensor. FT sensor
is a range of value indicating a low voltage when the
temperature is high and a high voltage when the
temperature is low.
Fuel Temperature
This parameter displays the temperature of the fuel as
calculated by the ECM using the signal from the fuel
temperature (FT) sensor. The Tech 2 will display a low
temperature when the FT sensor signal voltage is high,
and a high temperature when the FT sensor signal
voltage is low.
Barometric Pressure Sensor
This parameter displays the voltage signal sent to the
ECM from the barometric pressure (BARO) sensor.
BARO sensor is a range of values indicating a low
voltage in high altitude area to a high voltage in low
altitude area.
Barometric Pressure
This parameter displays the barometric pressure
(BARO) as calculated by the ECM using the signal from
the barometric pressure (BARO) sensor. The Tech 2
will display a low barometric pressure in high altitude
area to a high barometric pressure in low altitude area.
EGR Position Sensor
This parameter displays the voltage signal sent to the
ECM from the EGR position sensor of the EGR valve.
EGR position sensor is a range of values indicating a
low voltage when the EGR valve is closed to a high
voltage when the EGR valve is opened.
EGR Position Variance
This parameter displays the difference of actual and
desired EGR valve position (actual value – desired
value) as calculated by the ECM using the signal from
the EGR position sensor. The negative value is
indicating a lower actual valve position (more closed).
The positive value is indicating a higher actual valve
position (more opened).
EGR Solenoid Command
This parameter displays the EGR valve control duty
ratio signal based on inputs to the ECM from various
engine sensors. The Tech 2 will display a low
percentage when the EGR valve is controlled to close.
The Tech 2 will display a high percentage when the
EGR valve is controlled to open.
Boost Pressure Sensor
This parameter displays the voltage signal sent to the
ECM from the boost pressure sensor. Boost pressure
sensor is a range of values indicating a low voltage
when the boost pressure is low (idle or lower engine
load) and a high voltage when the boost pressure is
high (higher engine load).
Boost Pressure
This parameter displays the boost pressure in the
intake duct as calculated by the ECM using the signal
from the boost pressure sensor. The Tech 2 will display
a low boost pressure when the low engine load to a
high boost pressure when the high engine load. Note
that the true boost pressure is determined by
subtracting barometric pressure from the actual
reading.
ASR System Command APP Angle
This parameter displays the controlled angle of the
accelerator pedal calculated by the electric hydraulic
control module (EHCU) (ABS module) when anti slip
regulator (ASR) system operated. The Tech 2 will
display 100% when the ECM is not controlled to reduce
fuel injection quantity. The Tech 2 will display a low
percentage when the ECM is controlled to reduce fuel
injection quantity to reduce drive wheels spinning.
Vehicle Speed
This parameter indicates the vehicle speed calculated
by the ECM using the signal from the vehicle speed
sensor (VSS). The Tech 2 will display a low value at
lower vehicle speeds, and a high value at higher
vehicle speeds.
Cylinder 1 Compensation
This parameter displays the adjustment of fuel volume
for cylinder 1 at low engine speed area as calculated by
the ECM. The Tech 2 will display a negative value if the
fuel volume is lowered. The Tech 2 will display a
positive value if the fuel volume is increased. If there is
a cylinder that is excessively high or low value, it may
indicate faulty fuel injector, weak or slightly seized
cylinder or an incorrectly programmed fuel injector ID
code.
Cylinder 2 Compensation
This parameter displays the adjustment of fuel volume
for cylinder 2 at low engine speed area as calculated by
the ECM. The Tech 2 will display a negative value if the
fuel volume is lowered. The Tech 2 will display a
positive value if the fuel volume is increased. If there is
a cylinder that is excessively high or low value, it may
indicate faulty fuel injector, weak or slightly seized
cylinder or an incorrectly programmed fuel injector ID
code.