Page 18 of 111
INSTRUMENT AND CONTROL FUNCTIONS
3-4
3
CB-77E
Coolant
temperatureDisplay Conditions What to do0°C ~ 40°C Symbol and “LO” are dis-
played.OK. Go ahead with riding.
41 °C ~ 117 °C Symbol and temperature
are displayed.OK. Go ahead with riding
118 °C ~ 140 °C Symbol and temperature
flash.
Indicator light comes on.Stop the motorcycle and allow it
to idle until coolant temperature
goes down.
If the temperature does not go
down, stop the engine. See
“Engine overheating” in the trou-
bleshooting chart on page 6-42
for instructions.
141 °C ~Symbol and “HI” flash.
Indicator light comes on.Stop the engine and allow it to
cool. See “Engine overheating”
in the troubleshooting chart on
page 6-42 for instructions.
˚C˚C˚C˚C
E_5eb_Functions.fm Page 4 Thursday, November 18, 1999 4:03 PM
Page 19 of 111
INSTRUMENT AND CONTROL FUNCTIONS
3-5
3
EAU02987
Oil level / coolant temperature indicator light circuit check
CB-75E
Indicator comes on. After a few seconds:
Indicator does not come on.
Have a Yamaha
dealer inspect the
electrical circuit.
Turn the main switch to “ON”.
Have a Yamaha dealer inspect
the electrical circuit.
If symbol “ ” is displayed, check the
engine temperature. (See page 3-4.)
Indicator goes off.
No symbol is on.
Symbol “ ” or
“” is displayed.
OK. Go ahead
with riding.
Indicator does not go off.If s ym b ol “ ” is
displayed, inspect
the oil level.
Oil level is OK.
Oil level is low.
Have a Yamaha dealer
inspect the electrical
circuit.
Supply
recommended
engine oil.
If the engine is hot,
allow it to cool and see
“Engine overheating”
in the troubleshooting
chart on page 6-42 for
instructions.
If the engine
temperature is
normal, have a
Yamaha dealer
inspect the
electrical circuit.
E_5eb_Functions.fm Page 5 Thursday, November 18, 1999 4:03 PM
Page 92 of 111
PERIODIC MAINTENANCE AND MINOR REPAIR
6-42
6
5. Engine overheating
EW000070
WARNING
@ Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be blown
out under pressure, which could cause serious injury. Open the radiator cap as follows. Wait until the engine has
cooled. Remove the radiator cap stopper by removing the screw. Place a thick rag like a towel over the radiator cap
and slowly rotate the cap counterclockwise to the detent. This procedure allows any residual pressure to escape.
When the hissing sound has stopped, press down on the cap while turning counterclockwise and remove it. @NOTE:@ If it is difficult to get the recommended coolant, tap water can be temporarily used, provided that it is changed to the recom-
mended coolant as soon as possible. @
Wait until the
engine has cooled.
Check the coolant level in the
reservoir tank and/or radiator.
Level is OK.Level is low, check the
cooling system for leakage.
No
leakage.Leakage.
Ask a Yamaha dealer to inspect
and repair the cooling system.Add coolant. (See NOTE.)
Restart the engine. If the engine overheats again, ask a
Yamaha dealer to inspect and repair the cooling system.
E_5eb_Periodic.fm Page 42 Thursday, November 18, 1999 4:06 PM
