WORKHORSE CUSTOM CHASSIS
Service Manual
2007 W Series
SECTION
7.2
PAGE
100
Automatic Transmission – Allison
2007 W Series Chassis
© 2006 Workhorse Custom Chassis — All Rights Reserved
WSM082106
18:12:15 hr/min/sec. This parameter measures the
length of time the engine has been in operation during
the present ignition cycle.
Engine Torque:
Displays a range of 0-9,999 lb ft. This
parameter is a calculated value based on engine load,
throttle position, mass air fl ow, and other engine and
transmission inputs. This parameter is accurate to within
15 lb ft of actual measured engine torque.
Forced Motor Solenoid A Enabled:
Displays Yes or
No. This parameter indicates the commanded state of
the pressure control solenoid A, reading Yes when the
solenoid is energized and No when de-energized.
Forced Motor Solenoid B Enabled:
Displays Yes or
No. This parameter indicates the commanded state of
the pressure control solenoid B, reading Yes when the
solenoid is energized and No when de-energized.
Gear Commanded:
Displays a range of 0-8. This
parameter indicates the commanded gear state from the
transmission control module (TCM). When the vehicle
is in the Park or Neutral position this parameter displays
0. When the vehicle is placed in Drive, this parameter
displays 1 while the vehicle is in fi rst gear and changes
accordingly as the vehicle shifts through 2, 3, 4, and 5.
Gear Ratio:
Displays a range of 0.000 to 8.00:1.
This parameter is the actual gear ratio of the current
commanded gear. In the current gear of R, D4, D3,
D2, D1, it is calculated by dividing the input speed by
the output speed. In the current gear of D5, with TCC
locked, the gear ratio is calculated by dividing the turbine
speed by the output speed.
Gear Selected:
Displays a range of 0-8. This parameter
indicates the selected state of the gear selector. Park =
8, Reverse = 7, Neutral = 0, Drive = 5, 3 = 3, 2 =2, 1 =1
as the gear selector is moved through the ranges.
Ignition Voltage:
Displays a range of 0.0-25.5 Volts.
This parameter indicates the voltage level on the
ignition input to the TCM. The normal ignition voltage is
approximately 13.8 volts, but may vary between 11-16
volts.
Last Output Speed Range Shift:
Displays a range of
0-8,192 RPM. This parameter indicates the RPM value
at which the last shift occurred.
Next Output Speed for Downshift:
Displays a range of
0-8,192 RPM. This parameter indicates the RPM value
at which the next output speed downshift will occur
based on current driving requirements.
Next Output Speed Upshift:
Displays a range of 0-
8,192 RPM. This parameter indicates the RPM value at
which the next output speed upshift will occur based on
current driving requirements.
Normal Shift Pattern:
Displays Enabled or Disabled.
This parameter indicates the transmission is operating
under a normal shift pattern strategy.
PC Sol. A Actual Current:
Displays 0.00-1.1 amps. This
parameter is the actual current of the pressure control A
solenoid circuit at the control module.
PC Sol. A Ref. Current:
Displays 0.00-1.1 amps. This
