1F-4 Engine Cooling System:
Diagnostic Information and Procedures
Engine Cooling Symptom Diagnosis
B940H21604001
Repair Instructions
Cooling Circuit Inspection
B940H21606001
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) Move the fuel tank backward. Refer to “Fuel Tank
Removal and Installation in Section 1G (Page 1G-
9)”.
2) Remove the radiator cap (1) and connect the
radiator tester (2) 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 relay, or open-or-
short circuited.
Repair or 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 relay, or open-or-
short circuited.
Repair or replace.
Extremely cold weather.
Put on radiator cover.
Defective thermostat.
Replace.
Defective ECT sensor.
Replace.
Defective ECM.
Replace.
1
I940H1020027-03
I705H1160004-01
Содержание Intruder VZ1500
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