Thermostat HONDA INTEGRA 1998 4.G Owner's Manual

Fans (cont'd)
- How the Gircuit Works
When the ignition switch is in ON (ll), voltage is
applied to the coils of the radiator fan relay and the
condenser fan relay (with A,/C) through fuse 17.
Whenever a ground is provided to the radiator fan
relay and condenser fan relay, the relays are
energized, turning on the radiator fan motor and
condenser fan motor. The relays can be grounded
by the radiator fan switch, engine or powertrain
control module (ECM or PCM) (USA), or the A,/C
and heater lan switches via the A'lC pressure switch
and the A,/C lhermostat.
A,/C Thermostat
The A,/C thermostat is located on the evaporator
housing. The A/C thermostat turns oft the A/C
compressor clutch it the temperature at the
evaporator goes below 3'C (37"F). This prevents
condensalion from freezing on the evaporator fins
and blocking the air delivery into the passenger
compartment. lt the temperature goes below 3'C
(37'F) turning off the A"/C thermostat, and the
BLU/RED wire at the A,/C diode was the only wire
providing ground to the condenser and radiator
fan relays (A,/C switch on, heater fans switch on,
radiator fan switch open, and ECM or PCM fan
controi output not grounded), the relay will
deenergize removing voltage from the condenser
and radiator fan motors causing them to stop
running.
A,/C Pressure Switch
The AJC oressure switch is located in the condenser
outlet line where refrigerant is in a high
temperature/high pressure liquid state. The A,/C
switch turns off the A,/C compressor clutch if it
senses abnormally high or low pressure. lf the A'lC
pressure switch opens, and the BLU/RED wire at
the A/C diode was the only wire providing ground
to the condenser and radiator fan relays (L/C switch
on, heater fans switch on, radiator lan switch open'
and ECM or PCM fan control output not grounded),
the relay will deenergize removing voltage from the
condenser and radiator fan motors causing them to
stop running.
A./C Diode
This diode orevents the radiator fan switch f rom
grounding the "A'lC ON" input to the engine or
powertrain control module (ECM or PCM).
Refer to the Service Manual (Section 23, Electrical)
for specific tests or troubleshooting procedures.
63-3

Connector ldentification and Wire Harness Routing (cont'd)
Connector
or
Terminal
Number of
Cavities,/
Color
LocationConnects toNotes
Heater Sub-harness A
c403
c404
uo /.t
uo/c
tJo/o
2-BRN
1O-GRY
2-NAT
4-BRN
4-GRN
3-GRY
14.GBY
Under right side of dash
Under right side of dash
Under right side of dash
Behind glove box
Behind glove box
Behind glove box
Behind middle of dash
Main wire harness
Main wire harness
Blower motor
Blower resistor
Recirculation control motor
A,/C thermostat
Heater sub-harness B
Heater Sub-harness B
c677
c682
tJOat.t
c684
14-GRY
8-GRY
6.NAT
14.GRN
Behind middle of dash
Middle of floor
Behind middle of dash
Behind middle of dash
Heater sub-harness B
Mode control motor
Heater fan switch
Heater control panel
HEATER SUB.HARNESS A
c684
HEATER
203-32
SUB.HARNESS B

Standards and Service Limits
missions - Section 11
* Including the pedal play 1 - 10 mm (0.04 - 0.39 in).
0Gooling - Sectlon
MEASUREMENTSTANDARD (NEW}
RadiatorCoolant capacity / (US qt, lmp qt) 81881 engine
I Including engine, heater, II cooling line and reservoir IReservoir capacity:0.6 f (0.63 US qt, 0.53 lmp qt) 818C1 engine
818C5 engine
M/T: 6.4 (6.8, 5.6) for overhaul4.4 14.6,3.9) for coolant change*
A,/T: 6.7 (7.1, 5.9) for overhaul4.7 $.0,4.1)for coolant change*
M/T: 6.7 (7.1,5.9) for overhaul4.7 (5.0, 4.1) for coolant change*
M/T: 6.5 (6.9, 5.7) for overhaul4.5 (4.8, 4.0) for coolant change*
Radiator capOpening pressure kPa (kgf/cm', Psi)93 - 123 (0.95 - 1.25, 13.5 - 17.8)
ThermostatStart to open 'F ("C)
Fully open "F ("C)
Valve lift at fully open
169 - 176 (76 - 80)194 (90)
8.0 (0.31)min.
Cooling fanThermoswitch "ON" temperature "F ('C)
Thermoswitch "OFF" temperature "F ("C)196 - 203 (91 - 95)Subtract 5 - 14 (3 - 8) from actual "ON" temperature
*: Including the coolant in the reservoir and that remaining in the engine
Fuel and E
MEASUREMENTSTANDARD (NEW}SERVICE LIMIT
Pressure regulatorPressure with regulator vacuum hose disconnected
kPa (kgf/cm', psi) 81881 engine818C1 engine818C5 engine
270 - 320 (2.8 - 3.3, 40 - 47].
329 - 378 (3.35 - 3.85, 48 - 55)
320 - 370 (3.3 - 3.8, 47 -541
Fuel tankCapacity / (US gal, lmp gal)50 (13.2, 11.0)
Engineldle speed with headlight and cooling fan off rpm81881, 818C1 engines 750 t 50 (M/T: neutral)750 I 50 (A/T: N or E Position)818C5 engine 800 t 50 (M/T: neutral)
Fast idle rpmB1881, 818C1 engines 1,600 t 200 (M/T: neutral)1,600 t 200 (A/T: E or E Position)818C5 engine 1,500 t 200 (M/T: neutral)
ldle CO %0.1 max.
Clutch - Section 'lZ
MEASUREMENTSTANDARD (NEW}SERVICE LIMIT
Clutch pedalPedal height to floor
StrokePedal playDisengagement height to floor
164 (6 7/16)130 - 140 (5.12 - 5.51)12 -21 (12 - 13/16)*83 (3.27) min.
FlywheelClutch surface runoul0.05 (0.002) max,0.15 (0.006)
Clutch discRivet head depthThickness
1.2 - 1.7 (0.05 - 0.07)8.3 - 9.0 (0.33 - 0.35)0.2 (0.01)
6.0 (0.24)
Pressu re plateWarpageDiaphragm spring finger alignmenl
0.03 (0.001) max.0.6 (0.021 max.
0.15 (0.006)
0.8 (0.03)
3-6