TM 5-2420-230-10
shift lever is in another position, the driver has to place the lever in the N (Neutral) position before a direction of travel
can be selected.
b. Indicator Display.
The indicator display consists of Light-Emitting Diodes (LEDs), which give information to the driver. The following
information about the EGS and the transmission can be displayed on the indicator display:
Selected EGS lever position
Selected transmission position
Application-specific information
Diagnostic information.
The LEDs are numbered (1) through (8). They are also multicolored and may display red, green, or yellow. The LEDs
indicate the selected shift lever position and the selected transmission position. They can also indicate operating mode
and diagnostic information.
LEDs (1) through (6) indicate the status of the transmission. The gear that the transmission is in is indicated by one of
the LEDs displaying a steady light. If the driver requests a different gear, a second LED begins to blink, indicating the
requested gear has not yet been selected.
The LED colors indicate if F (Forward), R (Reverse), or N (Neutral) has been selected. Displayed colors are:
Green = F (Forward)
Yellow = R (Reverse)
Red = N (Neutral)
LED (7) indicates converter lockup is engaged. It always displays orange, regardless of direction, if lockup is active in
normal operating mode.
LED (8) indicates the status of the speed sensor and the status of the transmission protection system.
Table 5-1 lists
and describes
system LED colors and their meanings.
LED Color
Indication
Green
"Go" condition - neutral lock not active, and gears can be selected, but there is no speed signal,
e.g., vehicle is stationary.
Orange
Neutral lock is active, and gears cannot be selected.
Red
Neutral lock is active, and speed is not zero.
Blinking
Either disengage, neutral lock, or throttle switch is closed, preventing drive (Note: N (Neutral)
LED should be red).
The red LED, labeled N (Neutral), indicates transmission is in neutral (even if the shift lever is not in the neutral
position).
5-5