
Engine Cooling System: 1F-4
Diagnostic Information and Procedures
Engine Cooling Symptom Diagnosis
B831G21604001
Repair Instructions
Cooling Circuit Inspection
B831G21606001
WARNING
!
• Do not open the radiator cap when the
engine is hot, as you may be injured by
escaping hot liquid or vapor.
• When removing the radiator cap tester, put
a rag on the filler to prevent the engine
coolant from spraying out.
Inspect the cooling circuit in the following procedures:
1) Remove the radiator cap lid (1) and radiator cap (2).
2) Connect the radiator tester (3) to the filler.
3) Pressurize the cooling system with 120 kPa (1.2 kgf/
cm, 17 psi) of pressure, and then check if it holds the
pressure for 10 seconds.
CAUTION
!
Do not exceed the radiator cap release
pressure, or the radiator cap and
subsequently the radiator, can be damaged.
4) After finishing the cooling circuit inspection, reinstall
the removed parts.
Condition
Possible cause
Correction / Reference Item
Engine overheats
Not enough engine coolant.
Add engine coolant.
Radiator core clogged with dirt or scale.
Clean.
Faulty cooling fan.
Repair or replace.
Defective cooling fan thermo-switch.
Replace.
Clogged water passage.
Clean.
Air trapped in the cooling circuit.
Bleed air.
Defective water pump.
Replace.
Use of incorrect engine coolant.
Replace.
Defective thermostat.
Replace.
Defective ECT sensor.
Replace.
Defective ECM.
Replace.
Engine over cools
Defective cooling fan thermo-switch.
Replace.
Extremely cold weather.
Put on radiator cover.
Defective thermostat.
Replace.
Defective ECT sensor.
Replace.
Defective ECM.
Replace.
1
2
I831G1160003-01
3
I831G1160005-01
Summary of Contents for 2009 LT-A750XK9
Page 2: ......
Page 4: ......
Page 5: ...SUPPLEMENTS L LT A750XK9 09 MODEL 10 LT A750XPK9 09 MODEL 11 ...
Page 29: ...0A 15 General Information 99565 01010 013 CD ROM Ver 13 ...
Page 57: ...0B 28 Maintenance and Lubrication 09915 40610 Oil filter wrench Page 0B 12 Page 0B 12 ...
Page 68: ...0C 11 Service Data ...
Page 310: ...1K 5 Exhaust System ...
Page 482: ...4D 6 Parking Brake ...
Page 528: ...6B 13 Steering Handlebar ...
Page 581: ......