1-2 Shift Error: This parameter displays the difference
between the desired 1-2 shift time and the actual 1-2 shift
time. A positive number indicates a firm or fast shift, the actual shift time was
shorter than the desired shift time. A negative number indicates a soft or slow shift,
the actual shift time was longer than the desired shift time. This value is only accurate
if the shift was adaptable.
1-2 Shift Time: This parameter displays the actual time
of the last adaptable 1-2 shift. The shift time is based on the gear
ratio change after the commanded 1-2 shift.
1-2 Sol.: This parameter displays the commanded state
of the 1-2 shift solenoid valve. When the transmission is in FIRST and
FOURTH gear, the display should indicate ON, current is flowing trough the solenoid.
When the transmission is in SECOND and THIRD gear, the display should indicate OFF,
current is not flowing through the solenoid.
1-2 Sol. CKT Status: This parameter displays the solenoid valve feedback voltage signal circuit status on the scan tool. If the voltage is low when the solenoid is commanded OFF, the scan tool will display Open/Short to GND. If the
voltage is high when the solenoid is commanded ON, the scan tool will display Short to Volts. If no circuit fault is present, the scan tool will display OK. Until the circuit has been evaluated, the scan tool will display Indeterminate.
1-2 TAP Cell (4-16): This parameter displays the
amount of transmission adaptive pressure (TAP), based on 17 N·m
(12.5 lb ft) of engine torque increment per cell, added to or subtracted
from shift pressure during a 1-2 upshift. A positive number indicates
that long shifts have been detected and PC solenoid pressure has been added in order
to decrease shift time. A negative number indicates that short shifts have been detected
and PC solenoid pressure has been subtracted in order to increase shift time.
2-3 Shift Error: This parameter displays the difference
between the desired 2-3 shift time and the actual 2-3 shift
time. A positive number indicates a firm or fast shift, the actual shift time was
shorter than the desired shift time. A negative number indicates a soft or slow shift,
the actual shift time was longer than the desired shift time. This value is only accurate
if the shift was adaptable.
2-3 Shift Time: This parameter displays the actual time
of the last adaptable 2-3 shift. The shift time is based on the gear
ratio change after the commanded 2-3 shift.
2-3 Sol.: This parameter displays the commanded state
of the 2-3 shift solenoid valve. When the transmission is in FIRST and
SECOND gear, the display should indicate ON, current is not flowing trough the solenoid.
When the transmission is in THIRD and FOURTH gear, the display should indicate OFF,
current is flowing through the solenoid.
2-3 Sol. CKT Status: This parameter displays the solenoid valve feedback voltage signal circuit status on the scan tool. If the voltage is low when the solenoid is commanded OFF, the scan tool will display Open/Short to GND. If the
voltage is high when the solenoid is commanded ON, the scan tool will display Short to Volts. If no circuit fault is present, the scan tool will display OK. Until the circuit has been evaluated, the scan tool will display Indeterminate.
2-3 TAP Cell (4-16): This parameter displays the
amount of transmission adaptive pressure (TAP), based on 17 N·m
(12.5 lb ft) of engine torque increment per cell, added to or subtracted
from shift pressure during a 2-3 upshift. A positive number
indicates that long shifts have been detected and PC solenoid pressure has been added
in order to decrease shift time. A negative number indicates that short shifts have
been detected and PC solenoid pressure has been subtracted in order to increase shift
time.
3-4 Shift Error: This parameter displays the difference
between the desired 3-4 shift time and the actual 3-4 shift
time. A positive number indicates a firm or fast shift, the actual shift time was
shorter than the desired shift time. A negative number indicates a soft or slow shift,
the actual shift time was longer than the desired shift time. This value is only accurate
if the shift was adaptable.
3-4 Shift Time: This parameter displays the actual time
of the last adaptable 3-4 shift. The shift time is based on the gear
ratio change after the commanded 3-4 shift.
3-4 TAP Cell (4-16): This parameter displays the
amount of transmission adaptive pressure (TAP), based on 17 N·m
(12.5 lb ft) of engine torque increment per cell, added to or subtracted
from shift pressure during a 3-4 upshift. A positive number indicates
that long shifts have been detected and PC solenoid pressure has been added in order
to decrease shift time. A negative number indicates that short shifts have been detected
and PC solenoid pressure has been subtracted in order to increase shift time.
A/C Clutch: This parameter displays the commanded state of the
air conditioning (A/C) compressor clutch relay driver circuit and displays
On or Off. The A/C compressor clutch should be engaged when On displays. When the
display indicates On, the line pressure and the shift times will be adjusted for the
additional engine load.
A/C Clutch Feedback Signal: This parameter displays the commanded
state of the air conditioning (A/C) compressor clutch relay driver circuit
and displays On or Off. The A/C compressor clutch should be engaged when On displays.
When the display indicates On, the line pressure and the shift times will be adjusted
for the additional engine load.
Commanded Gear: This parameter displays the current commanded
state of the shift solenoid valves. The scan tool displays 1, 2, 3, 4 or 5.
Cruise: This parameter displays the commanded state of the cruise
control system. The scan tool displays ENABLED or DISABLED. When the display indicates
ENABLED, the PCM is allowing cruise control operation. When the display indicates
DISABLED, the PCM has disabled cruise control operation. When the cruise control display
is ENABLED, shift patterns will be altered for 2-3 and 3-4 upshifts or
4-3 and 3-2 downshifts.
Current TAP Cell: This parameter displays the current transmission
adaptive pressure (TAP) cell in use for transmission line pressure adaptation.
The cells are based on 17 N·m (12.5 lb ft) of engine torque.
The higher the engine torque, the higher the current TAP cell. The last cell used
will remain displayed until the next adaptable upshift occurs.
Driver Shift Control: This parameter displays Active or Inactive.
The scan tool displays Active when the gear selector is in the manual (M) position,
which enables TAP Shift. The scan tool displays Inactive when the gear selector is
not in the M position, TAP Shift disabled.
Driver Shift Request: This parameter displays the current request
from the TAP Shift System. This parameter will display upshift, downshift or invalid,
depending on the amount of voltage measured at the remote shift selector input, and
will also display none when there is no request.
ECT: This parameter displays the input signal from the engine
coolant temperature (ECT) sensor. ECT is high at 151°C (304°F) when
the signal voltage is low, 0 volt. ECT is low at -40°C (-40°F)
when the signal voltage is high, 5 volt.
ECT Sensor: This parameter displays the input signal from the
engine coolant temperature (ECT) sensor. ECT is high at 151°C (304°F)
when the signal voltage is low, 0 volt. ECT is low at -40°C (-40°F)
when the signal voltage is high, 5 volt.
Engine Run Time: This parameter displays a measure in Hr:Min:Sec
of the length of time the engine has been operating. When the ignition is cycled to
OFF, the value is reset to zero.
Engine Speed: This parameter displays the rotational
speed of the engine expressed as revolutions per minute.
Engine Torque: This parameter displays a calculated value based
on engine load, throttle position, mass air flow, and other engine inputs. This parameter
is accurate to within 20 N·m (15 ft lb) of actual measured
engine torque.
Gear Ratio: This parameter displays the actual transmission
gear ratio. The scan tool displays the gear ratio calculated from the automatic transmission
input shaft speed sensor (AT ISS) and the automatic transmission output
shaft speed sensor (AT OSS) inputs.
Ignition Voltage: This parameter displays the system voltage
measured at the ignition feed.
Last Shift Time: This parameter displays the actual time of
the last upshift. This value is only accurate if the shift was adaptable.
PC Sol. Actual Current: This parameter displays the actual current
flow through the pressure control solenoid circuit, which is measured by the control
module. High current flow results in low line pressure. Low current flow results in
high line pressure.
PC Sol. Ref. Current: This parameter displays the commanded
current of the pressure control solenoid circuit. High current results in low line
pressure. Low current results in high line pressure.
PC Sol. Duty Cycle: This parameter displays the commanded state
of the pressure control solenoid, expressed as a percentage of energized ON time.
A reading of low percent indicates zero ON time, non energized, or no current flow.
A high percent at idle indicates maximum ON time, energized, or high current flow.
Shift Request Voltage: This parameter displays the amount of
voltage measured at the Remote Shift Selector input.
Steady State TAP 1GR: This parameter displays a pressure modification
which is added to the line pressure in 1st gear. The larger the value, the greater
the increase to line pressure.
Steady State TAP 2GR: This parameter displays a pressure modification
which is added to the line pressure in 2nd gear. The larger the value, the
greater the increase to line pressure.
Steady State TAP 2GR/TCC: This parameter displays a pressure
modification which is added to the line pressure in 2nd gear with TCC applied.
The larger the value, the greater the increase to line pressure.
Steady State TAP 3GR: This parameter displays a pressure modification
which is added to the line pressure in 3rd gear. The larger the value, the
greater the increase to line pressure.
Steady State TAP 3GR/TCC: This parameter displays a pressure
modification which is added to the line pressure in 3rd gear with TCC applied.
The larger the value, the greater the increase to line pressure.
Steady State TAP 4GR: This parameter displays a pressure modification
which is added to the line pressure in 4th gear. The larger the value, the
greater the increase to line pressure.
Steady State TAP 4GR/TCC: This parameter displays a pressure
modification which is added to the line pressure in 4th gear with TCC applied.
The larger the value, the greater the increase to line pressure.
Steady State TAP Reverse: This parameter displays a pressure
modification which is added to the line pressure in Reverse gear. The larger the value,
the greater the increase to line pressure.
TCC Brake Switch: This parameter displays the status of the
TCC brake switch circuit input. OPEN indicates a zero voltage input, brake pedal applied.
CLOSED indicates a voltage input, brake pedal released. The scan tool displays OPEN
or CLOSED.
TCC Duty Cycle: This parameter displays the commanded percentage
of ON time for the TCC PWM solenoid. A high percentage represents an ON, energized,
commanded state. 0 percent represents an OFF, non-energized, commanded
state.
TCC Duty Cycle CKT Status: This parameter displays the solenoid driver feedback voltage signal and displays the circuit status on the scan tool. If the voltage is low when the solenoid is commanded OFF, the scan tool will display Open/Short
to GND. If the voltage is high when the solenoid is commanded ON, the scan tool will display Short to Volts. If no circuit fault is present, the scan tool will display OK. Until the circuit has been evaluated, the scan tool will display Indeterminate.
TCC Release Pressure: This parameter displays the status of
the normally closed TCC release switch and displays YES or NO. When TCC release fluid
pressure is present, the switch is open, indicating that the TCC is released. When
the fluid pressure is not present, the switch is closed, indicating that the TCC is
applied.
TCC Slip Speed: This parameter displays the difference between
transmission input speed and engine speed. A negative value indicates the engine speed
is less than the input speed, deceleration. A positive value indicates the engine
speed is greater than the input speed, acceleration. A value of zero indicates the
engine speed is equal to the input speed, TCC applied.
TFP Sw.: This parameter displays Park/Neutral, Reverse, Drive4,
Drive3, Drive2, Drive1 or invalid. This parameter is the decoded status of the three
A/B/C inputs from the automatic transmission fluid pressure manual valve position
switch. If a valid combination of inputs is not detected, invalid will be displayed.
TFP Sw. Sig. B/Sig. C: This parameter displays HI/LOW, HI/LOW.
The displays are the two inputs from the automatic transmission fluid pressure manual
valve position switch. HI represents an ignition voltage signal, switch open. LOW
represents a low voltage signal, switch closed.
TFT Sensor: This parameter displays the voltage drop across
the transmission fluid temperature (TFT) sensor circuit. 5 volts is
applied to the TFT sensor circuit. The sensor is a thermistor which changes internal
resistance based on temperature. When the sensor is cold, the internal resistance
is high, resulting in a high signal voltage. As the sensor warms, the internal resistance
decreases, and the signal voltage will also decrease. A low signal voltage indicates
a warm TFT, and a high signal voltage indicates a cold TFT.
TP Angle: This parameter displays a percentage that is calculated
based on TP sensor voltage. The TP angle should display 0 percent at idle and
100 percent at wide open throttle (WOT).
TP Indicated Angle: This parameter displays the desired throttle
angle for operating conditions present at the time.
TR Sw.: This parameter displays the decoded status of the four
A/B/C/P inputs from the transmission range switch. The scan tool displays Park, Reverse,
Neutral, Drive, Intermediate, Low, and invalid. If a valid combination of inputs is
not detected, invalid will be displayed.
TR Sw. A/B/C/P: This parameter displays the status of the four
inputs from the transmission range switch. The scan tool displays HI/LOW. HI indicates
an ignition voltage input to the control module. LOW indicates a zero voltage input
to the control module.
Traction Control: This parameter displays Active or Inactive.
When the PCM receives a request for torque reduction from the electronic brake traction
control module (EBTCM), Active is displayed.
Traction Control Signal: This parameter displays Active or Inactive.
When the PCM receives a request for torque reduction from the electronic brake traction
control module (EBTCM), Active is displayed.
Trans. Fluid Temp.: This parameter displays the input signal of the transmission fluid temperature sensor. Transmission fluid temperature is high, 151°C (304°F), when signal voltage is low, 0 volt. Transmission fluid temperature
is low, -40°C (-40°F), when signal voltage is high, 5 volt.
Transmission Hot Mode: This parameter displays the automatic
transmission fluid temperature (TFT) and displays On or Off. Off indicates
that the TFT has not exceeded 130°C (266°F). On indicates that the TFT has
exceeded 130°C (266°F) and has not cooled to 120°C (248°F) for greater
that 5 seconds. These numbers are approximate and differ with transmissions.
Transmission ISS: This parameter displays the rotational speed
of the transmission input shaft. The scan tool displays input shaft speed as
revolutions per minute (RPM).
Transmission OSS: This parameter displays the rotational speed
of the transmission output shaft. The scan tool displays output shaft speed as revolutions
per minute (RPM). On four-wheel drive applications, the transfer case
output shaft speed is measured.
Vehicle Speed: This parameter displays the speed at which the
vehicle is traveling. The scan tool displays vehicle speed as kilometers per hour (km/h),
miles per hour (MPH). The vehicle speed is calculated based on the input signal
from the automatic transmission output shaft speed sensor.