TM 5-3805-293-23-1
0011
Table 2. Engine Troubleshooting with Codes for the 120M Motor Grader - Continued.
CDI FMI CODE
ERROR/EVENT
CORRECTIVE ACTION
N OT E
0549-02 Throttle Lock
Switch Data Erratic, Intermit-
The throttle lock feature is activated through the use of the throttle lock
tent, or Incorrect - Contin-
switch and the "throttle lock set/accel switch" in order to maintain a
ued
desired engine speed. The throttle lock switch is a three-position rocker
switch that is used to select the mode of operation. The throttle lock
feature has the following three modes of operation: Automatic mode,
Manual mode, and OFF.
Automatic Mode: Depress the throttle lock switch in the AUTO position
in order to select the automatic mode. Use the throttle pedal to achieve
the desired engine speed and then depress the "throttle lock set/accel
switch" in the forward direction (SET/ACCEL) in order to set the desired
engine speed. The automatic mode will be disable if the following
actions occur:
-
Applying the service brake will suspend the selected engine speed
and the engine will decelerate.
-
Applying the throttle pedal to more than 25 percent after the throttle
lock set/accel switch has been set will suspend the selected engine
speed.
-
The operator moves the throttle lock switch to the OFF position.
-
Manual Mode: Depress the throttle lock switch in the MAN position
in order to select the manual mode. Use the throttle pedal to achieve
the desired engine speed and then depress the "throttle lock set/
accel switch" in the forward direction (SET/ACCEL) in order to set
the desired engine speed. The manual mode will be disabled if the
following actions occur:
-
The throttle lock is switched to the OFF position.
-
OFF Mode: The throttle lock feature is disabled and the throttle
pedal is the only means of controlling engine speed.
Change 1
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