Transmission Control System (Smoother) 7A-35
*4: The accelerator opening angle does not always
match the operational feel of the pedal. Some difference
between the two is not abnormal.
Tech 2 Data Definitions
A list of each message displayed on the Tech 2 will be
explained in Transmission Controls. This information
will assist in driveability problems. The displays can be
viewed while the vehicle is being driven. Always perform
the Diagnosis System Check - Transmission Controls
first. The Diagnostic System Check will confirm proper
system operation.
Ignition Voltage
This parameter displays the ignition voltage measured
at the ignition feed circuit of the TCM. Voltage is applied
to the TCM when the ignition switch is ON position.
Engine Speed
This parameter displays the rotational speed of the
crankshaft as calculated by the engine control module
(ECM) based on inputs from the crankshaft position
(CKP) sensor or camshaft position (CMP) sensor. This
data is sent over the CAN serial data link from the ECM
to the TCM. The Tech 2 will display the engine speed in
revolution per minute (RPM).
Turbine Speed
This parameter displays the rotational speed of the
gearshift multi-plate clutch as calculated by the TCM
based on an input from the turbine speed sensor. The
Tech 2 will display the turbine speed in revolution per
minute (RPM).
Input Shaft Speed
This parameter displays the rotational speed of the
transmission counter shaft as calculated by the TCM
based on an input from the input shaft speed sensor.
The Tech 2 will display the turbine speed in revolution
per minute (RPM).
Engine Speed and Input Shaft Speed Difference
This parameter display the difference of engine speed
and input shaft speed (engine speed - input shaft speed)
as calculated by the TCM using the signal from the input
shaft speed sensor and crankshaft rotational speed that
is sent over the CAN serial data link from the engine
control module (ECM) to the TCM. The Tech 2 will
display a low value when the gearshift clutch is
engaged, and a high value when the gearshift clutch is
disengaged.
Output Shaft Speed
This parameter displays the transmission output shaft
speed calculated by the engine control module (ECM)
using the signal from the output shaft speed sensor that
is called vehicle speed sensor (VSS). This data is sent
over the CAN serial data link from the ECM to the TCM.
The Tech 2 will display the engine speed in revolution
per minute (RPM).
Vehicle Speed
This parameter displays the vehicle speed calculated by
the engine control module (ECM) using the signal from
the vehicle speed sensor (VSS). This data is sent over
the CAN serial data link from the ECM to the TCM. The
Tech 2 will display a low value at lower vehicle speeds,
and a high value at higher vehicle speeds.
Accelerator Pedal Position Sensor Signal
This parameter displays the angle of the accelerator
pedal as calculated by the engine control module (ECM)
using the signals from the accelerator pedal position
(APP) sensors. This data is sent over the CAN serial
data link from the ECM to the TCM. The APP sensor
signal is a range of values indicating a low percentage
when the accelerator pedal is not depressed to a high
percentage when the accelerator pedal is fully
depressed.
Slip alarm
When the accelerator pedal is pressed while the parking brake is ON and
the vehicle is in gear
Inclined stop alarm
When the vehicle is stopped on an incline, even though the accelerator
pedal is depressed
Clutch pedal point adjustment
When torque learning (adjustment) is being performed
High-gear very low speed running
When vehicle speed is low while the gear position is very high
Overrun alarm
When the engine is over-running
Parking brake reminder
When the vehicle is running with the parking brake applied
Long-term gear in
When the vehicle is left in gear for a long time while stopped
Overrun shift prohibit
When there is an attempt to down-shift while the engine is over-running.
Underrun shift prohibit
When there is an attempt to up-shift while the engine is under-running.
N lock alarm
When the change lever position is change from N to D without pressing the
brake
PTO idle up adjustment
When the idle speed is being adjusted while the PTO is active
PTO mode On
When the PTO mode is on
PTO mode Off
When the PTO mode is off
Buzzer OFF
When buzzer operation is prohibited