2000 SUZUKI SWIFT engine coolant

1. Cooling fan motor
2. Radiator
ENGINE COOLING 6B-3
THERMOSTAT
A wax pellet type thermostat is used in the coolant outlet passage
to control the flow of engine coolant, to provide fast engine warm
up and to regulate coolant temperatures.
A wax pellet element is hermetically contained in a metal case, and
expands when heated and contracts when cooled.
When the pellet is heated and expands, the metal case pushes
down the valve to open it.
As the pellet is cooled, the contraction allows the spring to close the
valve.
Thus, the valve remains closed while the coolant is cold, preventing
circulation of coolant through the radiator.
At this point, coolant is allowed to circulate only throughout the en-
gine to warm it quickly and evenly.
As the engine warms, the pellet expands and the thermostat valve
opens, permitting coolant to flow through the radiator.
In the top portion of the thermostat, an air bleed valve (1) is pro-
vided; this valve is for venting out the gas or air, if any, that is accu-
mulated in the circuit.
Thermostat functional spec. ± 2.8
C (5.0
F)
Temp. at which valve
begins to open88
C (190
F)
Temp. at which valve
become fully open100
C (212
F)
COOLING FAN
The cooling fan is driven by electric motor, and the motor is acti-
vated by ECM / PCM (engine coolant temp.). For its details, refer to
Section 6E.
WARNING:
Keep hands, tools, and clothing away from engine cooling
fan to help prevent personal injury. This fan is electric and
can come on whether or not the engine is running. The fan
can start automatically in response to the ECM / PCM (en-
gine coolant temp.) with the ignition switch in the “ON”
position.

6B-4 ENGINE COOLING
COOLANT (WATER) TEMP. GAUGE
The coolant temp. gauge is included in engine coolant temp. (ECT)
sensor (1). This gauge activates a temp. meter in the instrument
cluster.
DIAGNOSIS
ConditionPossible CauseCorrection
Engine overheatsLoose or broken water pump belt
Not enough coolant
Faulty thermostat
Faulty water pump
Dirty or bent radiator fins
Coolant leakage on cooling system
Defective cooling fan motor
Plugged radiator
Faulty radiator cap
Maladjusted ignition timing
Dragging brakes
Slipping clutchAdjust or replace.
Check coolant level and add as
necessary.
Replace.
Replace.
Clean or remedy.
Repair.
Check and replace as
necessary.
Check and replace radiator as
necessary.
Replace.
Adjust.
Adjust brake.
Adjust or replace.

ENGINE COOLING 6B-5
ANTI-FREEZE PROPOR-
TIONING CHART COOLANT CAPACITY
G13 engine G10 engine
MAINTENANCE
COOLANT
The coolant recovery system is standard. The coolant in the radiator expands with heat, and the overflow is col-
lected in the reservoir tank.
When the system cools down, the coolant is drawn back into the radiator.
The cooling system has been filled at the factory with a quality coolant that is either 50 / 50 mixture of water and
GOLDEN CRUISER 1200 (ethylene glycol antifreeze.) or 30 / 70 mixture of water and GOLDEN CRUISER 1200.
The 50 / 50 mixture coolant solution provides freezing protection to – 36
C (– 33
F), the 30 / 70 mixture coolant solu-
tion provides freezing protection to – 16
C (3
F).
When changing the engine coolant, use mixture of 50% water and 50% GOLDEN CRUISER 1200 for the market
where ambient temperature falls lower than – 16
C (3
F) in winter and mixture of 70% water and 30% GOLDEN
CRUISER 1200 for the market where ambient temperature doesn’t fall lower than – 16
C (3
F).
NOTE:
Alcohol or methanol base coolant or plain water alone should not be used in cooling system at any time
as damage to cooling system could occur.
Even in a market where no freezing temperature is anticipated, mixture of 70% water and 30% ethylene
glycol antifreeze (Antifreeze / Anticorrosion coolant) should be used for the purpose of corrosion protec-
tion and lubrication.
ANTI-FREEZE PROPORTIONING TABLE
Vehicle with M / TVehicle with A / T
Freezing temperature
C–16–36–16–36Freezing temperature
F3–333–33
Anti-freeze / Anti-corrosion
coolant concentration%30503050
G10Itr.1.17 / 2.731.95 / 1.951.20 / 2.802.00 / 2.00G10
engineUS pt.2.47 / 5.774.12 / 4.122.54 / 5.924.23 / 4.23
Ratio of compound to
engineImp pt.2.06 / 4.803.43 / 3.432.11 / 3.703.52 / 3.52
cooling water
G13Itr.1.38 / 3.222.30 / 2.301.41 / 3.292.35 / 2.35G13
engineUS pt.2.92 / 6.804.86 / 4.862.98 / 6.954.96 / 4.96engineImp pt.2.43 / 5.674.05 / 4.052.48 / 5.794.13 / 4.13
Engine radiator and heater3.3 liters
(7.0 / 5.8 US / Imp pt.)3.4 liters
(7.2 / 6.0 US / Imp pt.)
Reservoir tank0.6 liters
(1.3 / 1.1 US / Imp pt.)
Total3.9 liters
(8.2 / 6.9 US / Imp pt.)4.0 liters
(8.5 / 7.0 US / Imp pt.)
Engine radiator and heater4.0 liters
(8.5 / 7.0 US / Imp pt.)4.1 liters
(8.6 / 7.2 US / Imp pt.)
Reservoir tank0.6 liters
(1.3 / 1.1 US / Imp pt.)
Total4.6 liters
(9.7 / 8.1 US / Imp pt.)4.7 liters
(9.9 / 8.3 US / Imp pt.)

2. Outlet hose
6B-6 ENGINE COOLING
COOLING SYSTEM FLUSH AND REFILL
WARNING:
To help avoid danger of being burned, do not remove radia-
tor cap while engine and radiator cap while engine and ra-
diator are still hot. Scalding fluid and steam can be blown
out under pressure if cap is taken off too soon.
1) Remove radiator cap when engine is cool:
Turn cap counterclockwise slowly until it reaches a “stop”.
(Do not press down while turning it.)
Wait until pressure is relieved (indicated by a hissing sound)
then press down on cap and continue to turn it counterclock-
wise.
2) With radiator cap removed, run engine until upper radiator
hose is hot (this shows that thermostat is open and coolant is
flowing through system).
3) Stop engine and open radiator drain plug (1) to drain coolant.
4) Close drain plug. Add water until system is filled and run engine
until upper radiator hose is hot again.
5) Repeat Steps 3) and 4) several times until drained liquid is
nearly colorless.
6) Drain system and then close radiator drain plug tightly.
7) Disconnect reservoir tank hose from radiator. Remove reser-
voir tank and pour out any fluid. Scrub and clean inside of tank
with soap and water.
Flush it well with clean water and drain. Reinstall tank and
hose.
8) add 50 / 50 mixture of GOLDEN CRUISER 1200 (Good quality
ethylene glycol anti-freeze) and water to radiator and tank.
Fill radiator to the base of radiator filler neck and reservoir tank
to “FULL” level mark. Reinstall reservoir tank cap.
9) Run engine, with radiator cap removed, until radiator upper
hose is hot.
10) With engine idling, add coolant to radiator until level reaches
the bottom of filler neck. Install radiator cap, making sure that
the ear of cap lines up with reservoir tank hose.

1. Radiator hose
2. Clamp
ENGINE COOLING 6B-7
ON-VEHICLE SERVICE
WARNING:
Check to make sure that engine coolant temperature is
cold before removing any part of cooling system.
Also be sure to disconnect negative cord from battery ter-
minal before removing any part.
COOLING WATER PIPES OR HOSES
REMOVAL
1) Drain cooling system.
2) To remove these pipes or hoses, loosen screw on each pipe or
hose clip and pull hose end off.
INSTALLATION
Install removed parts in reverse order of removal procedure, noting
the following.
Tighten each clamp bolt securely.
Refill cooling system with proper coolant, referring to description
on COOLANT of MAINTENANCE.
THERMOSTAT
REMOVAL
1) Disconnect negative cable at battery.
2) Drain cooling system and tighten drain plug.
3) Disconnect thermostat cap (1) from thermostat case (2).

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-7
CON-
NECTOR
C02TERMI-
NAL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26ECM ground
Power source (from main relay)
Blank
Blank
Blank
Blank
EVAP canister purge valve
Shift solenoid-B (A / T)
Shift solenoid-A (A / T)
Igniter
Idle speed control actuator
Fuel injector
Injector ground
Power source (from battery)
Power source (from main relay)
Idle speed control actuator relay
Malfunction indicator lamp
Immobilizer indicator lamp
Heater of HO2S-2
Radiator fan relay
Fuel pump relay
Main relay
Blank
Idle speed control actuator
EFE heater relay
Injector groundC031
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22Data link connector
Vehicle speed sensor (+) (A / T)
Vehicle speed sensor (M / T)
Transmission range sensor (switch)“2”
Transmission range sensor (switch)“N”
Transmission range sensor (switch)“P”
Blank
Blank
Heated oxygen sensor-2
Blank
Fuel level sensor (gauge)
Blank
Data link connector
Vehicle speed sensor (–) (A / T)
Transmission range sensor (switch)“L”
Transmission range sensor (switch)“D”
Transmission range sensor (switch)“R”
A / C ON (output) signal for A / C control module
(if equipped)
Electric load signal
A / C (input) signal from A / C control module
(if equipped)
Ignition switch
Blank
Blank CIRCUITCON-
NECTORTERMI-
NALCIRCUIT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16Power source for sensors
Camshaft position sensor (+)
Crankshaft position sensor (+)
Closed throttle position switch
Manifold absolute pressure sensor
Throttle position sensor
Engine coolant temp. sensor
Heater of HO2S-1
Sensor ground
Camshaft position sensor (–)
Crankshaft position sensor (–)
EFE heater (monitor)
Heated oxygen sensor-1
Intake air temp sensor
Power steering pressure switch (if equipped)
Engine start signal circuit
C01
1. CMP sensor (in Distributor)
2. CKP sensor
3. TP sensor
4. MAP sensor
5. ECT sensor
6. IAT sensor
7. HO2S-1
8. HO2S-2
9. Transmission range switch (A / T)
10. VSS (A / T)
11. A / C control module (if equipped)
12. Heater blower switch
13. Fuel level sensor
14. Speedometer
15. P.SP switch
16. Rear defogger switch
17. Light switch
18. DLC
19. Fuel injector20. Injector resistor
21. Conister purge valve
22. Fuel pump relay
23. Rediator fan relay
24. EFE heater relay
25. ISC actuator relay
26. ISC actuator
27. Ignition coil
28. Igniter
29. Immobilizer indicator lamp
30. MIL
31. Main relay
32. Shift solenoid A (A / T)
33. Shift solenoid B (A / T)
34. Starter motor
35. Ignition switch

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-15
1. Injector coupler
2. TP sensor
3. Water hose
4. Vacuum hose
5. ISC actuator
6. Fuel return hose
7. Fuel feed hose
1. Injector coupler
Good No good
2) Install throttle body to EFE heater and tighten bolts to specified
torque.
Tightening Torque
(a): 23 N
.m (2.3 kg-m, 17.0 lb-ft)
3) Install accelerator cable to throttle valve lever and cable brack-
et.
4) Connect fuel, cooling water and vacuum hoses to throttle body,
and clamp securely.
5) Connect TP sensor and injector couplers securely.
6) Refill cooling system referring to Section 6B.
7) Connect negative cable at battery.
8) With engine “OFF” and ignition switch “ON”, check for fuel
leaks around fuel line connection.
9) Install air cleaner assembly referring to Section 6A.
10) Upon completion of installation, start engine and check for fuel
leaks and engine coolant leaks.
Adjust cable play to specification according to procedure de-
scribed in ACCELERATOR CABLE ADJUSTMENT.
FUEL INJECTOR
ON-VEHICLE INSPECTION
1) With battery negative cable disconnected, disconnect injector
coupler.
2) Connect ohmmeter to each injector terminal and measure resis-
tance.
Resistance of injector: 0.5 – 1.5 Ω at 20C (68F)
If resistance is out of specification, replace fuel injector.
3) Connect injector coupler.
4) Remove air cleaner assembly without disconnecting IAT sensor
coupler.
5) Check that fuel is injected out in conical shape from fuel injector
when cranking or running engine.
If no fuel is injected, check wiring harness for continuity and cou-
plers for proper connection referring to “DIAGNOSTIC FLOW
TABLE B-1”.
If fuel is not injected out in conical shape, replace injector.
6) Check injector for fuel leakage after injection is stopped (i.e., af-
ter cranking or engine stop).
Replace if leakage exists.
Fuel leakage: Less than 1 drop/min.
7) Install air cleaner assembly.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-21
( ) for reference kΩ
TEMPERATURE 0
3220
6840
10460
14080C
176F (5.88)
2.21–2.69
(1.14)
(0.58)
0.29–0.35
2
1
1. ECT sensor
2. Distributor
INSPECTION
Immerse temperature sensing part of IAT sensor in water (or ice)
and measure resistance between sensor terminals while heating
water gradually.
If measured resistance doesn’t show such characteristic as shown
in left figure, replace IAT sensor.
INSTALLATION
Reverse removal procedure noting the following.

Clean mating surfaces of IAT sensor and air cleaner case.

Connect IAT sensor coupler securely.
ENGINE COOLANT TEMPERATURE SENSOR
(ECT SENSOR)
REMOVAL
1) Disconnect battery negative cable at battery.
2) Drain coolant referring to Section 6B.
WARNING:
To help avoid danger of being burned, do not remove radia-
tor cap while engine and radiator are still hot. Scalding fluid
and steam can be blown out under pressure if cap is taken
off too soon.
3) Disconnect coupler from ECT sensor.
4) Remove ECT sensor from thermostat case.