Service manual

G420F(FE) Service Manual Chapter 5. Engine Management System (EMS) 202
Ground Speed Limit Switch (optional)
Location
Description
Ground Speed Limit Switch is located in the
pressure port on transmission (T/M) for operating by
the transmission (T/M) oil pressure change. This
switch is normally opened, and then it is closed as
the T/M oil pressure increases. Actually the switch is
closed by increasing of the T/M oil pressure after
engine cranking. And if the inching pedal is pushed
by a driver the switch is opened again by decreasing
of the T/M oil pressure. ECM can control the travel
speed of the folk lift trucks with this switch. Also the
maximum travel speed of Tier-3 and Non cert fork lift
trucks is an optional feature that can be easily
activated using the MotoView Service Tool. This
feature may be of particular interest to customers
with indoor warehouse operations.
[Circuit Diagram]
[Harness Connectors]
Inspection
1. Remove the Ground Speed Limit Switch from the
transmission.
2. Use an ohmmeter to check the continuity between
the 1 terminal and the 2 terminal. If there is
continuity, replace the Ground Speed Switch.
3. The Ground Speed Limit Switch is the ‘ON/OFF’
switch. So during the normal status the switch
circuit should be open.