Extended Engine Shutdown; Transmission Shift Selector - Monaco DIPLOMAT 2004 Owner's Manual

When the motorhome has been sitting for extended periods, 30 days or
more, verify all the fluid levels are correct. Follow the normal starting
procedures. If the oil pressure gauge does not register within 15 seconds,
shut off the engine immediately to avoid damage. Consult the OEM Engine
Manual for guidelines on troubleshooting low oil pressure, or contact a
qualified service technician. If oil pressure is normal, allow the engine to
idle for three to five minutes before operating under a load.
The Allison World transmission incorporates the World Transmission
Electronic Control (WTEC) system. The system is compromised of five
major components connected by a wiring harness: the electronic control
unit (ECU), engine throttle position sensor, three speed sensors, remote
shift selector (keypad) and the control module. The ECU processes
information received from the throttle position sensor, speed sensor,
pressure switch and shift selector to activate solenoids on the control
module in the transmission. The solenoids control oncoming and off
going clutch pressure to provide closed loop shift control. This is
accomplished by matching transmission and engine RPM during a
shift to establish a desired shift profile within the ECU.
The system is monitored for the first 30 seconds of each engine start.
This is referred to as "autodetect." Autodetect searches for presence of
data inputs of transmission components. Autodetect enables the ECU
functions and diagnostics to respond to items that are detected.
Another feature of the transmission is the ability to "learn" or
"adapt." The electronic control system optimizes shift quality by using
"Adaptive Shifting." A wide variety of varied shift conditions is required
before optimizing shift quality. Generally, five typical shifts of a
consistent shift type is needed to optimize shift quality.
The range selection is accomplished via the remote push button
selector. The controls are R, N, D, arrow UP, arrow DOWN, MODE
button and a digital display window. Under normal operation press the
D button and the digital display shows the highest forward range
attainable for shift selection in use. The digital display window will also
indicate codes for abnormal conditions, and can even be a useful
troubleshooting aid. When the ignition is turned ON, the display should
be visible. This display indicates the presence of neutral start command. If
the display indication is not visible, there is no power to the selector and
the transmission will not allow the engine to start. This is an indicator
of electrical problems with the engine batteries, ECU on shift selector
keypad.
The window displays gear selection, various transmission modes, oil
level and transmission fault codes.
CHASSIS INFORMATION
DIPLOMAT 2004
Extended Engine
Shutdown
TRANSMISSION
Shift Selector
Economy
trans shifter w mode light.eps
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