1994 HONDA INTEGRA coolant temperature

Fan Controls
Fan Motor Test
1. Disconnect the 2-P connector from the fan motor.
2. Test the motot by connecting battery power to the
B terminal, and ground to the A terminal
3. lf the Jan motor fails to run smoothly, replace it.
NOTE: The illustration shows the radiator fan.
Engine Coolant Temperature (ECT)
Switch Test
NOTE: Bleed air from the cooling system atter install-
ing the engine coolant temperature (ECT) switch (see sec-
tion 1O).
1. Remove the ECT switch from the thermostat
housing.
2. Suspend the ECT switch in a container of coolant
as shown.
Heat the coolant and check engine coolanl tempera-
ture with a thermometer.
Check the continuity between the A and B terminals
according to the table:
Terminal
;;,".,"---\
B
Switch
Above 196 2O3"F
{91-95'C)o_-o
Below 181- 189oF
(83-87'C)
23-112

Gauge Assembly
Component Location Index
CAUTION:
a All SRS electrical wiring harnosses are cov€rod withyellow insulation.
a Bofore disconnecting any prn ot th€ SRS wire har-ness, connect tho short connector(sl.a R€place th6 entirs affGcted SRS halne$ assembly ifit has an open circuit o? damaged wiring.
SRS MAIN HARNESS{Cov.r6d with yollow inrularionl
GAUGE ASSEMBLYGauge Location Index, page 23-114Indicator Location Index, page 23-1 14Terminal Location Index, page 23-114Bulb Location. page 23-'l 15Disassembly. page 23-1 19Removal, page 23-118
FUEL GAUGE SENDING UNtTTest, page 23'124Repfacemenr, page 23-124
VEHICLE SPEEO SENSOB IVSS}Test, page 23-120fnput Test. page 23-120Repfacement, page 23-122
PARKITTG BRAKE SWITCHTest, page 23-127
BRAKE FLUID LEVEL SWITCHTesr, page 23-127
EI{GINE OIL PBESSURE SWITCHTest, page 23-122
ENGINE COOLANT TEMPERATURE IECTI GAUGESENOING UNITTest, page 23-126
(C61'ios tho SBS indicator signal)
23-113

GaugeTest
NOTE: Refer to page 23-116 fot the wiring description
oJ the engine coolant temperature (ECT) gauge circuit
diagram.
1. Check the No. 15 (10 A) fuse in the under-dash
tuse/relay box before testing.
2. Make sure the ignition switch is OFF, then discon-
nect the YEL/GRN wire from the ECT gauge send-
ing unit and g.ound it with a jumper wire.
Turn the ignition switch ON (lll.
Check that the pointer of the ECT gauge starts mov-
ing toward the "H" mark,
CAUTION: Tuln th6 ignition switch OFF botore th€
point reaches "H" on tho gaugo dial. Failuro to do
so may damago tho gaugo.
a It the pointer of the gauge does not move at all,
check Jor an oDen in rhe YEL or YEL/GRN wire.
lf the wires are OK, replsce the ECT gauge.
a It the ECT gauge works, test the ECT sending
untt.
J.
Engine Coolant Temperature (ECTI Gauge
ECT Sending Unit Test
Disconnect the YEL/GRN wire from the ECT send-
ing unit.
With the engine cold, use an ohmmeter to measure
resistance between the positive terminal and the en-
gine (ground).
Check the temperature of the coolant.
Run the engine and measure the change in ,esistance
with the engine ai operating temperatu.e {the radi-
ator tan comes on).
5. ll the obtained readings are substantially different
Jrom the specifications above, replace the ECT send-
ing unit.
23-126
POSITIVE TERMINAL
Temperatu.e1330F (560C)185.F (850C)-
2120F (1000c)
Resistance (O)'t3746-30