06-6
2. DESCRIPTION AND OPERATION
1) General Description
The cooling system maintains the engine temperature at an efficient level during all engine operating
conditions.
When the engine is cold, the cooling system cools the engine slowly or not at all. This slow cooling o
f
the engine allows the engine to warm up quickly.
The cooling system includes a radiator and recovery subsystem, cooling fans, a thermostat and
housing, a water pump, and a water pump drive belt. The timing belt drives the water pump.
All components must function properly for the cooling system to operation. The water pump draws the
coolant from the radiator. The coolant then circulates through water jackets in the engine block, the
intake manifold, and the cylinder head. When the coolant reaches the operating
temperature of the thermostat, the thermostat opens. The coolant then goes back to the radiator where
it cools.
This system directs some coolant through the hoses to the heat core. This provides for heating and
defrosting.
The coolant reservoir is connected to the radiator to recover the coolant displaced by expansion from
the high temperatures. The coolant reservoir maintains the correct coolant level.
The cooling system for this vehicle has no radiator cap or filler neck. The coolant is added to the cooling
system through the coolant reservoir.
2) Radiator
This vehicle has a lightweight tube-and-fin aluminum radiator. Plastic tanks are mounted on the upper
and the lower sides of the radiator core.
On vehicles equipped with automatic transaxles, the transaxle fluid cooler lines run through the radiato
r
tank.
A radiator drain plug is on this radiator.
To drain the cooling system, open the drain plug.
3) Coolant Reservoir
The coolant reservoir is a transparent plastic reservoir, similar to the windshield washer reservoir.
The coolant reservoir is connected to the radiator by a hose and to the engine cooling system by anothe
r
hose.
As the vehicle is driven, the engine coolant heats and expands. The portion of the engine coolant
displaced by this expansion flows from the radiator and the engine into the coolant reservoir. The ai
r
trapped in the radiator and the engine is degassed into the coolant reservoir.
When the engine stops, the engine coolant cools and contracts. The displaced engine coolant is then
drawn back into the radiator and the engine. This keeps the radiator filled with the coolant to the desired
level at all times and increases the cooling efficiency.
Maintain the coolant level between the MIN and MAX marks on the coolant reservoir when the system is
cold.
06-72112-01
4) Water Pump
The belt-driven centrifugal water pump consists of an impeller, a drive shaft, and a belt pulley.
The impeller is supported by a completely sealed bearing.
The water pump is serviced as an assembly and, therefore, cannot be disassembled.
5) Thermostat
A wax pellet-type thermostat controls the flow of the engine coolant through the engine cooling system.
The thermostat is mounted in the thermostat housing to the front of the cylinder head.
The thermostat stops the flow of the engine coolant from the engine to the radiator to provide faste
r
warm-up, and to regulate the coolant temperature. The thermostat remains closed while the engine
coolant is cold, preventing circulation of the engine coolant through the radiator. At this point, the engine
coolant is allowed to circulate only throughout the heater core to warm it quickly and evenly.
As the engine warms, the thermostat opens. This allows the engine coolant to flow through the radiato
r
wherethe heat is dissipated. This opening and closing of the thermostat permits enough engine coolant
to enter the radiator to keep the engine within proper engine temperature operating limits.
The wax pellet in the thermostat is hermetically sealed in a metal case. The wax element of the
thermostat expands when it is heated and contracts when it is cooled.
As the vehicle is driven and the engine warms, the engine coolant temperature increases. When the
engine coolant reaches a specified temperature, the wax pellet element in the thermostat expands and
exerts pressure against the metal case, forcing the valve open. This allows the engine coolant to flow
through the engine cooling system and cool the engine.
As the wax pellet cools, the contraction allows a spring to close the valve.
The thermostat begins to open at 87°C(188.6 °F) and is fully open at 102°C(215.6°F). The
thermostat closes at 85°C (187°F).
6) Electric Cooling Fan
Keep hands, tools, and clothing away from the engine cooling fans to help prevent personal injury.
This fan is electric and can turn on even when the engine is not running. -
If a fan blade is bent or damaged in any way, no attempt should be made to repair or reuse the
damaged part. A bent or damaged fan assembly should always be replaced with a new one to
prevent possible injury. -
07-6
(2) Cold Cranking Amperage
The cold cranking amperage test is expressed at a battery temperature of -18°C(0°F).
The current rating is the minimum amperage, which must be maintained by the battery for 30 seconds at
the specified temperature, while meeting a minimum voltage requirement of 7.2 volts.
This rating is a measure of cold cranking capacity.
The battery is not designed to last indefinitely. However, with proper care, the battery will provide many
years of service. If the battery tests well, but fails to perform satisfactorily in service for no apparent
reason, the following factors may point to the cause of the trouble:
Vehicle accessories are left on overnight.
Slow average driving speeds are used for short periods.
The vehicle's electrical load is more than the generator output, particularly with the addition o
f
aftermarket equipment.
Defects in the charging system, such as electrical shorts, a slipping generator belt, a faulty generator,
or a faulty voltage regulator.
Battery abuse, including failure to keep the battery cable terminals clean and tight or a loose battery
hold-down clamp.
Mechanical problems in the electrical system, such as shorted or pinched wires. ·
·
·
·
·
·
3) Charging Time Required
The time required to charge a battery will vary depending upon the following factors:
Size of Battery - A Completely discharged large heavy-duty battery required more than twice the
recharging time as a completely discharged small passenger car battery. ▶
<007b008c00940097008c00990088009b009c0099008c00470054004700680047009300960095008e008c00990047009b00900094008c0047009e00900093009300470089008c00470095008c008c008b008c008b0047009b00960047008a008f0088009900
8e008c00470088009500a0004700890088009b009b008c0099>y at -18°C(0°F) than at
27°C(80°F).
When a fast charger is connected to a cold battery, the current accepted by the battery will be very
low at first.
The battery will accept a higher current rate as the battery warms. ▶
Charger Capacity - A charger which can supply only 5 amperes will require a much longer charging
period than a charger that can supply 30 amperes or more. ▶
State-of-Charge - A completely discharged battery requires more than twice as much charge as a
onehalf charged battery.
Because the electrolyte is nearly pure water and a poor conductor in a completely discharged
battery, the current accepted by the battery is very low at first. Later, as the charging current causes
the electrolyte acid content to increase, the charging current will likewise increase. ▶
02-38710-01
1. PERFORMANCE AND SPECIFICATIONS
1) Rated Load & Input Signals
Rated Load
▶
NO.
Item Rated Load
1 Chime bell / Buzzer DC 12V 350 mA (Inductive load)
2 Front room lamp DC 12V 16W (Lamp load)
3 Rear room lamp DC 12V 8W (Lamp load)
4 Ignition key illumination DC 12V 1.2W (Lamp load)
5 Seat belt indicator DC 12V 1.2W (Lamp load)
6 Parking brake warning lamp DC 12V 1.2W (Lamp load)
7 Door ajar warning lamp DC 12V 1.2W (Lamp load)
8 Door lock relay DC 12V 200 mA (Inductive load)
9 Door unlock relay DC 12V 200 mA (Inductive load)
10 Horn relay DC 12V 260 mA
11 Tail lamp relay DC 12V 200 mA (Inductive load)
12 Hazard warning lamp relay DC 12V 200 mA (Inductive load)
13 Power window relay DC 12V 200 mA (Inductive load)
14 Rear defogger relay DC 12V 200 mA (Inductive load)
15 Wiper LOW relay DC 12V 200 mA (Inductive load)
16 Wiper HIGH relay DC 12V 200 mA (Inductive load)
17 Front washer motor DC 12V 1.5A
18 Head lamp relay DC 12V 750 mA (Inductive load)
19 Front defogger relay DC 12V 200 mA (Inductive load)
20 Mirror lock relay DC 12V 200 mA (Inductive load)
21 Mirror unlock relay DC 12V 200 mA (Inductive load)
02-4
Input Signals
▶
NO.
Input Signal Name Logic Status
1 IGN1 ON = BAT
(IGN ON or START)
2 IGN2 ON = BAT (IGN ON)
3 ALT_D ON = BAT (engine started)
4 Key reminder switch IN = BAT (key in)
5 Driver's door switch OPEN = GND, CLOSE = OPEN
6 Passenger's door switch OPEN = GND, CLOSE = OPEN
7 Rear door switch - OPEN (one of rear doors) = GND
- CLOSE (all rear doors) = OPEN
8 Hood switch OPEN = GND, CLOSE = OPEN
9 Driver's door lock/unlock switch LOCK = OPEN, UNLOCK = GND
10 Passenger's door lock/unlock switch LOCK = OPEN, UNLOCK = GND
11 Rear door lock/unlock switch - UNLOCK (one of rear doors)
= GND
- LOCK (all rear doors) = OPEN
12 Tailgate lock/unlock switch LOCK = OPEN, UNLOCK = GND
13 Rear defogger switch ON = GND, OFF = OPEN
14 Seat belt switch Unfastened = GND, Fastened = OPEN
15 Sunroof open switch ON = GND, OFF = OPEN
16 Parking brake switch ON = GND, OFF = OPEN
17 Air bag collision sensor ON = 200 ms output (LOW), OFF = OPEN
18 Wiper motor (parking) switch STOP = BAT VOLTAGE, ROTATING = GND
19 Washer switch ON = BAT, OFF = OPEN
20 INT-AUTO switch ON = BAT, OFF = OPEN
21 Auto washer switch ON = BAT, OFF = OPEN
22 Intermittent resistance 0W ~ 51KW (for intermittent wiper)
23 Speed sensor ON = GND (PWM), OFF = OPEN
24 Mirror lock/unlock switch ON = GND, OFF = OPEN
25 Front defogger switch ON = GND, OFF = OPEN
26 Auto hazard switch ON = GND, OFF = OPEN
02-28
▶Seat Belt WarningThe seat belt warning light comes on and the chime buzzer sounds for 6 secon\
ds when turning
the ignition key to "ON" from "OFF".
If the seat belt is fastened before turning the ignition key to the the "ON" position, the warning light
blinks, however, the chime buzzer does not sound.
The seat belt warning light goes off and the chime buzzer stops when turning the ignition switch to
the "OFF" position during the warning operation.
The chime buzzer stops and the seat belt warning light stays on for the remainig time when
fastening the seat belt.
The seat belt warning light comes on and the chime buzzer sounds for 6 s\
econds again when
unfastening the seat belt during fastening operation while the ignition \
key is "ON" position.
1.
2.
3.
4.
The seat belt warning light blinks and the chime buzzer sounds for 6 seconds\
when turning the ignition
key to "ON" without fastening the seat belt. After fastening the seat be\
lt, the chime buzzer stops.
Seat Belt Warning LightChime Buzzer
04-58210-01
1. DESCRIPTIONS OF INDICATOR DISPLAY
Tachometer
SSPS warning light
Immobilizer indicator
Glow indicator
ESP indicator/warning light
Front fog light indicator
High beam indicator
ESP OFF indicator
Seat belt reminder (driver’s seat)
Seat belt reminder (passenger’s seat)
Engine oil pressure warning light
LCD Display
Engine overheat warning light
Engine check warning light
Auto cruise indicator
Light indicator
Winter mode indicator 1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.Engine hood open warning light
Battery charge warning light
Hazard Indicator
Water separator warning light
Air bag warning light
4WD CHECK warning light
4WD LOW indicator
4WD HIGH indicator
Speedometer
Turn signal indicator
Coolant temperature gauge
Brake warning light
Door ajar warning light
ABS warning light
Fuel gauge
Low fuel level warning light 18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33. It sends and receives information to/from each unit through CAN communication line. The LCD display
and separate ESP ON/OFF indicator are newly added.
04-78210-01
Sub connector - 20-pin
(white)
Connector Pin Arrangement ▶
The connector pin sections illustrated below are viewed from the front of the instrument cluster. The
arrangement of the pins is the same for both the main connector and the sub connector.
1. IGN2+
2. CHARGE(ALT)
3. -
4. HAZARD
5. FRONT FOG
6. -
7. SSPS
8. PASSENGER SEATBELT
9. HOOD OPEN
10. -
11. -
12. PARKING BRAKE INPUT
13. OIL PRESSURE
14. TURN LEFT
15. HIGH BEAM+
16. TURN RIGHT
17. HIGH BEAM-
18. DRIVER SEATBELT
19. AIRBAG
20. -1. B+
2. -
3. DOOR OPEN
4. CHECK ENGIN (GSL ONLY)
5. -
6. ILL+
7. BUZZER OUTPUT
8. 4P OUTPUT
9. -
10. -
11. IGN1+
12. GND
13. FUEL GND
14. CAN HIGH
15. CAN LOW
16. MT R INPUT
17. MT N INPUT
18. RESET/MODE SW
19. FUEL INPUT
20. -
Main connector - 20-pin
(gray)