To add coolant
The cooling system is a closed system and normal-
ly the loss of coolant should be very slight. A no-
ticeable drop in the coolant level could indicate leak-
age. If this occurs, we recommend you to have the
system checked as soon as possible.
If the level should drop below the “LOW” level on
the reserve tank, open the reserve tank cap (E) and
add coolant.
WARNING
l
Do not open the reserve tank cap (E)
while it is hot. The coolant system is un-
der pressure and any hot coolant escap-
ing could cause severe burns.
Anti-freeze
The coolant contains an ethylene glycol anti-corro-
sion agent. Some parts of the electric motor are
cast aluminium alloy, and periodic changing of the
electric motor coolant is necessary to prevent corro-
sion of these parts.
Use “DIA QUEEN SUPER LONG LIFE COOL-
ANT PREMIUM” or equivalent*.
*: similar high quality ethylene glycol based non-
silicate, non-amine, non-nitrate and non-borate cool-
ant with long life hybrid organic acid technology
MITSUBISHI Genuine Coolant has excellent pro-
tection against corrosion and rust formation of all
metals including aluminium and can avoid block-
ages in the radiator, heater, etc.
Because of the necessity of this anti-corrosion
agent, the coolant must not be replaced with plain
water even in summer. The required concentration
of anti-freeze differs depending on the expected am-
bient temperature.
Above -35 °C: 50 % concentration of anti-freeze
Below -35 °C: 60 % concentration of anti-freeze
CAUTION
l
Do not use alcohol or methanol anti-
freeze or any engine coolants mixed with
alcohol or methanol anti-freeze. The use
of an improper anti-freeze can cause cor-
rosion of the aluminium components.
l
Do not use water to adjust the concentra-
tion of coolant.
l
Concentrations exceeding 60 % will re-
sult in a reduction of both the anti-freeze
and cooling performance.
l
Do not top up with water only.
Water by itself reduces the rust-protec-
tive and anti-freeze qualities of the cool-
ant and has a lower boiling point. It can
also cause damage to the cooling system if
it should freeze. Do not use tapwater, as it
can cause corrosion and rust formation.
During cold weather
If the temperatures in your area drop below freez-
ing, there is the danger that the coolant in the elec-
tric motor, on board charger/DC-DC converter or
radiator could freeze and cause severe damage to
the electric motor, on board charger/DC-DC con-
verter and/or radiator. Add a sufficient amount of
anti-freeze to the coolant to prevent it from freezing.
The concentration should be checked before the
start of cold weather and anti-freeze added to the
system if necessary.
Vehicle care and Maintenance
8-10
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