1-2 Shift Error: Displays a range of -6.38 to +6.38 seconds. This parameter is
the difference between the desired 1-2 shift time and the actual 1-2 shift
time. A positive number indicates the actual shift time was longer than the
desired shift time. This value is only accurate if the Adaptable Shift parameter
indicates Yes.
1-2 Shift Time: Displays a range of 0.00-6.38 seconds. This parameter is the actual
time of the last 1-2 shift. The shift time is based on the engine RPM drop
after the commanded 1-2 shift. This value is only accurate if the Adaptable
Shift parameter indicates Yes.
1-2 Sol.: Displays ON or OFF. This parameter is the commanded state of the 1-2
shift solenoid valve. ON represents a commanded energized state (current is
flowing through the solenoid). OFF represents a non-commanded state (current
is not flowing through the solenoid).
1-2 Sol. Open/Short to GND: Displays Yes or No. This parameter indicates if an open or short to ground
exists in the 1-2 shift solenoid valve feedback signal to the PCM. This parameter
is valid only when the 1-2 shift solenoid is commanded OFF.
1-2 Sol. Short to Volts: Displays Yes or No. This parameter indicates if a short to voltage exists
in the 1-2 shift solenoid valve feedback signal to the PCM. This parameter
is valid only when the 1-2 shift solenoid is commanded ON.
2-3 Shift Error: Displays a range of -6.38 to +6.38 seconds. This parameter is
the difference between the desired 2-3 shift time and the actual 2-3 shift
time. A positive number indicates the actual shift time was longer than the
desired shift time. This value is only accurate if the Adaptable Shift parameter
indicates Yes.
2-3 Shift Time: Displays a range of 0.00-6.38 seconds. This parameter is the actual
time of the last 2-3 shift. The shift time is based on the engine RPM drop
after the commanded 2-3 shift. This value is only accurate if the Adaptable
Shift parameter indicates Yes.
2-3 Sol.: Displays ON or OFF. This parameter is the commanded state of the 2-3
shift solenoid valve. ON represents a commanded energized state (current is
flowing through the solenoid). OFF represents a non-commanded state (current
is not flowing through the solenoid).
2-3 Sol. Open/Short to GND: Displays Yes or No. This parameter indicates if an open or short to ground
exists in the 2-3 shift solenoid valve feedback signal to the PCM. This parameter
is valid only when the 2-3 shift solenoid is commanded OFF.
2-3 Sol. Short to Volts: Displays Yes or No. This parameter indicates if a short to voltage exists
in the 2-3 shift solenoid valve feedback signal to the PCM. This parameter
is valid only when the 2-3 shift solenoid is commanded ON.
3-2 Downshift Sol.: Displays On or Off. This parameter indicates if the 3-2 shift solenoid
valve assembly is currently commanded On or Off. The solenoid commanded state
is based on the transmission temperature. The solenoid will change states
during a 3-2 downshift to regulate the appropriate pressure. The commanded
state of the solenoid occurs at approximately 30 mph with a throttle
increase.
3-2 Sol. Open/Short to GND: Displays Yes or No. This parameter indicates if an open or short to ground
exists in the 3-2 shift solenoid valve assembly feedback signal to the
PCM. This parameter is valid only when the 3-2 shift solenoid is commanded
OFF.
3-2 Sol. Short to Volts: Displays Yes or No. This parameter indicates if a short to voltage exists
in the 3-2 shift solenoid valve assembly feedback signal to the PCM.
This parameter is valid only when the 3-2 shift solenoid is commanded ON.
3-4 Shift Time: Displays a range of 0.00-6.38 seconds. This parameter is the actual
time of the last 3-4 shift. The shift time is based on the engine RPM drop
after the commanded 3-4 shift. This value is only accurate if the Adaptable
Shift parameter indicates Yes.
A/C Clutch: Displays On or Off. This parameter indicates the commanded state of the
A/C control relay. The clutch should be engaged when On displays.
Adaptable Shift: Displays Yes or No. Yes indicates that the proper operating conditions
were all within the proper operating range during the last shift and that
the shift time was accurate. This shift information is then used through the
adaptive function in order to update the adapt cells. No indicates that not
all of the operating conditions were met in order to enable this function
and that the adapt cells were not updated.
APP Average: Displays a range of 0-125 counts. The TAC Module takes the voltages
from the three APP Sensors, averages them, and converts them into counts.
This average is displayed on the scan tool. The average will be different
on every vehicle.
APP Indicated Angle: Displays a range of 0-100%. This parameter indicates the Accelerator
Pedal Position in percentage. When the APP is at rest, 0% is indicated. When
the APP is fully depressed, 100% is indicated.
Cruise: Displays Enabled or Disabled. This parameter indicates whether the PCM
is allowing cruise operation. The PCM has the ability to disable cruise control
under certain conditions.
Current Gear: Displays 1, 2, 3 or 4. This parameter indicates the current commanded
state of the shift solenoids.
Current TAP (Transmission Adaptive Pressure) Cell: Displays a TP cell range of 0-16. This parameter indicates the current
throttle position cell used for line pressure modification (adaptation).
Current TAP (Transmission Adaptive Pressure) Memory: Displays a range of -16 to +16 psi. This parameter is the
amount of pressure that is added to base line pressure to adjust the holding
effort of a clutch or band, while shifting.
ECT (Engine Coolant Temperature): Displays a range of -40°C to 151°C (-40°F to 304°F).
This parameter is the input signal of the engine coolant temperature sensor.
The engine coolant temperature is high (151°C) when the signal voltage
is low (0 V), and the engine coolant temperature is low (-40°)
when the signal voltage is high (5 V).
Engine Run Time: Displays a range of 0:00:00-18:12:15 hr/min/sec. This parameter
measures how long the engine has been operating. When the ignition switch
is turned OFF, the value is reset to zero.
Engine Speed: Displays a range of 0-8192 RPM. This parameter indicates the rotational
speed of the engine expressed as revolutions per minute.
Engine Torque: Displays a range of 0-9999 ft. lbs. This parameter indicates
the amount of torque that is delivered from the engine.
Hot Mode: Displays On or Off. This parameter monitors transmission temperature.
On indicates that the transmission temperature has exceeded 135°C (275°F).
IAT (Intake Air Temperature): Displays a range of -40°C to 215°C (-40°F to
419°F). The IAT sensor is a thermistor that is used to monitor the temperature
of the air entering the intake manifold. The PCM applies 5 volts to
the sensor on a 5-volt reference circuit. When the air is cool, the
resistance in the sensor will be high. If the air is warm, the sensor resistance
will be low and the PCM will sense a low voltage signal. The PCM converts
the signal of the IAT sensor to degrees Celsius. Intake air temperature is
used by the PCM to adjust fuel delivery and spark timing.
Ignition Voltage: Displays a range of 0.0-25.5 V. This represents the system voltage
measured by the PCM at it's ignition feed.
Latest Shift: Displays a range of 0.00 to 6.38 seconds. This parameter is the
actual shift time of the last upshift. This value is only accurate if the
Adaptable Shift parameter indicates Yes.
PC Sol. Actual Current: Displays a range of 0.00-1.10 amps. This parameter is the actual
current of the pressure control solenoid circuit at the control module. Zero amp
(no current flow) indicates actual higher line pressure. Actual lower line
pressure is indicated by 1.1 amps (high current flow).
PC Solenoid Duty Cycle: Displays a range of 0-100%. This parameter is the commanded state of
the pressure control solenoid expressed as a percent of energized ON time.
Zero percent indicates zero ON time (non-energized) or no current flow. Approximately
60% at idle indicates maximum ON time (energized) or high current flow.
PC Ref. (Reference) Current: Displays a range of 0.00-1.10 amps. This parameter is the commanded
current of the pressure control solenoid circuit. Zero amp (no current
flow) indicates commanded higher line pressure. Commanded lower line pressure
is indicated by 1.1 amps (high current flow).
Speed Ratio: Displays a range of 0.00:1-8.00:1. This parameter indicates engine
speed divided by transmission output speed. This value is used to estimate
transmission gear ratio.
TAP % of TP: Displays psi. This parameter indicates the amount of pressure, based
on a specific throttle position, that is added to base line pressure to adjust
the apply effort of a clutch or band during a shift.
TCC Brake Switch: Displays Open or Closed. This parameter indicates the state of the brake
switch circuit input. Open indicates a zero voltage input (brake switch open,
brake pedal applied). Closed indicates a B+ voltage input (brake switch closed,
brake pedal released).
TCC Duty Cycle: Displays a range of 0-100%. This parameter is the commanded percentage
of ON time of the TCC PWM solenoid. Approximately 90% represents an ON (energized)
commanded state. Zero percent represents an OFF (non-energized) commanded
state. This commanded state is applied at a vehicle speed between approximately
0-16 km/h (0-10 mph).
TCC Duty Cycle Open/Short to GND: Displays Yes or No. This parameter indicates whether an open or a short
to ground exists in the TCC PWM solenoid valve feedback signal to the PCM.
This parameter is valid only when the TCC PWM solenoid is commanded OFF (duty
cycle is 0%).
TCC Duty Cycle Short to Volts: Displays Yes or No. This parameter indicates whether a short to voltage
exists in the TCC PWM solenoid valve feedback signal to the PCM. This parameter
is valid only when the TCC PWM solenoid is commanded ON (duty cycle is at
maximum).
TCC Enable: Displays Yes or No. This parameter is the commanded state of the TCC
solenoid. Yes indicates a commanded energized state (current is flowing through
the solenoid). No indicates a commanded non-energized state (current is not
flowing through the solenoid). This commanded state occurs at various vehicle
speeds between applications.
TCC Enable Open/Short to GND: Displays Yes or No. This parameter indicates whether an open or a short
to ground exists in the TCC solenoid valve feedback signal to the PCM. This
parameter is valid only when the TCC solenoid is commanded OFF.
TCC Enable Short to Volts: Displays Yes or No. This parameter indicates whether a short to voltage
exists in the TCC solenoid valve feedback signal to the PCM. This parameter
is valid only when the TCC solenoid is commanded ON.
TCC Mode: Displays a range of 0 through 5. Zero (0) or Off Mode indicates that
the PCM commands the TCC Off at a calibrated minimum throttle. The calibrated
minimum throttle is different at low vehicle speeds than it is at high vehicle
speeds. Off Mode is also active when the transmission is in the wrong gear
range, the engine or transmission is cold, the brake input indicates that
the brakes are On, a downshift or upshift is initiated, the engine is at idle,
the transmission is in hot mode, or a misfire is detected. One (1) or Release
Mode indicates that the PCM commands the release of the TCC. Two (2) or Apply
Mode indicates that the PCM commands the apply of the TCC. Apply pressure
varies based on normal or performance operations, hot conditions, or if the
cruise control is active. Apply Mode is used under normal driving conditions.
All apply pressure is dependent on throttle position and vehicle speed. Three
(3) or Apply Enable Mode indicates that enabling conditions are met for applying
the TCC (enabling conditions include vehicle speed, gear selection, transmission
temperature, throttle angle, brake switch status, etc.). Four (4) or Locked
Mode indicates that the PCM commands full capacity of the TCC when the transmission
is in fourth gear and the vehicle speed is greater than a calibrated value.
When variable TCC apply pressure stops (Apply Mode), maximum TCC pressure
is used. Five (5) or Coast Mode indicates that the PCM commands apply of the
TCC when the transmission is in fourth gear and the throttle and vehicle speed
are not high enough to enable Apply Mode, but high enough to keep the TCC
applied. When Coast Mode is active, TCC apply pressure is set to a predetermined
amount.
TCC Slip Speed: Displays a range of -4080 to 4079 RPM. This parameter is the difference
between transmission output speed and engine speed. A negative value indicates
that the engine speed is less than the output speed (deceleration). A positive
value indicates that the engine speed is greater than the output speed (acceleration).
A value of zero indicates that the engine speed is equal to the output speed
(TCC applied).
TFT (Transmission Fluid Temperature) Sensor: Displays a range of 0.00-5.00 V. When the transmission fluid is
cold, the sensor resistance is high and the PCM will sense high signal voltage.
As the transmission fluid temperature warms to a normal operating temperature,
the sensor resistance becomes less and the voltage decreases.
TFP Switch A/B/C: Displays On/Off, On/Off, On/Off. These parameters are the three inputs
from the Automatic Transmission Fluid Pressure Manual Valve Position Switch
Assembly. On represents a 0 voltage signal. Off represents a B+ voltage signal.
TP Desired Angle: Displays a range of 0-100%. This parameter indicates the PCM's desired
throttle angle for operating conditions present at that time.
TP Indicated Angle: Displays a range of 0-100%. This parameter indicates the amount of throttle
opening.
Trans. Fluid Temp.: Displays a range of -40°C to 151°C (-40°F to 304°F).
This parameter is the input signal of the transmission fluid temperature sensor.
Transmission fluid temperature is high (151°C) when signal voltage is
low (0 V), and transmission fluid temperature is low (-40°) when
signal voltage is high (5 V).
Transmission OSS (Output Speed Sensor): Displays a range of 0-8192 RPM. This parameter indicates the rotational
speed of the transmission output shaft expressed as revolutions per minute.
Vehicle Speed: Displays a range of 0-255 km/h (0-158 mph). This parameter
is the input signal from the vehicle speed sensor assembly.