Suzuki AN400 Service Manual

Engine Cooling System: 1F-6
Diagnostic Information and Procedures
Engine Cooling Symptom Diagnosis
B705H11604001
Repair Instructions
Cooling Circuit Inspection
B705H11606001
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 handlebar covers. Refer to “Handlebar
Cover Removal and Installation in Section 9D
(Page9D-13)”.
2) Remove the front panel. Refer to “Front Panel
Removal and Installation in Section 9D (Page9D-
14)”.
3) Remove the radiator cap (1) and connect the
radiator tester (2) to the filler.
4) 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.
5) If the cooling system does not hold the pressure for
at least 10 seconds, check the entire cooling system
for leaks and replace the damaged part.
6) Install the front panel. Refer to “Front Panel Removal
and Installation in Section 9D (Page9D-14)”.
7) Install the handlebar covers. Refer to “Handlebar
Cover Removal and Installation in Section 9D
(Page9D-13)”.
CAUTION
!
Do not exceed the radiator cap release
pressure, or the radiator cap and
subsequently the radiator, can be damaged.
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
I705H1160003-02
I705H1160004-01

Suzuki AN400 Specifications

General

Brand	Suzuki
Model	AN400
Category	Scooter
Language	English