II-115
WSM Minor Change II Service Engineering Section
a. Development concept
1. Background of Adoption of New Meter
(1) The L1 (3-ton class) Series, which was released in Japan in 1999 for domestic users, adopted a new
meter of LCD type (called YUYU NAVI). Since then, this meter has been one of the sales points of
the Series.
(2) Presently, the new meter is applied to only models for domestic users. No models for overseas users
adopt this meter.
(3) The new meter has a stable reputation for providing advanced performance, convenience, and user-
friendliness. This sales point should be added to models for overseas users.
(4) As of 2004, LCD type meter has alrady been incorporated in KX41-3, KX61-3 and KX71-3. Now this
meter is going to applied to KX91-3 to KX161-3 and U35 to U45-3 all of models.
2. Features of New Meter
(1) Advanced performance:
Digital display (multi-language support for EU-version), alarm sound, and design performance (see
fig. 2 on the right-hand side)
(2) Parts integration:
Relays and controllers supporting a variety of functions for conventional models are integrated into the
new meter for space saving and high cost performance. (Relays partly need to be installed externally.)
(3) Functions in a Wide Variety
1. Warning and self-diagnostic functions:
The following items are displayed on the LCD with graphics, failure (warning) numbers, and char-
acters along with an alarm sound.
• Remaining fuel (see fig. 3 on the right-hand side)
• Oil pressure (see fig. 4 on the right-hand side)
• Charge (see fig. 5 on the right-hand side)
• Overvoltage
• Overheating
2. Inspection time instruction function:
"SERVICE HOURS" appears whenever the time has come for the inspection and replacement of
the oil filter as explained in the manual, and prompts the user to make an inspection.
3. Fuel replenishment assist function:
The meter beeps intermittently at the time of fuel replenishment, and the interval between beeps
is shortened when the tank is almost filled to prevent the fuel from overflowing.
The beep functions with the key turned OFF, but one of the switch needs to be pressed.
4. Service tester function:
This function allows the monitoring of the operation of electrical devices (e.g., an oil pressure
switch) connected to the meter and provides the history of failures resulted in the past (see figs. 6
and 7 on the right-hand side).
While in harness manipulation mode, it is possible to diagnose and single out harness compo-
nents that have internal failures (e.g., contact failures).
5. Other functions
• Low Travel speed reset at the time of restarting the engine (if the engine is turned OFF with
high - low switch set to the high range).
• Engine start check (preventing the engine from starting with the lever unlocked).
• Starter motor automatic disconnection
o Auto release
• Auto glow
• Built-in hour meter and display
• Built-in tachometer and display
6. Expansion function for this minor change : KX91-3, 101-3, 121-3, 161-3, U35, U35-3, U45-3
• Monitoring with theft prevention set up (EU-version only, optional)
• Service port (thumb) hand-held proportional control
• Air-conditioner idling control
• Auto idling
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