1997 HONDA CIVIC Engine coolant temperature gauge

13. Remove the upper radiator hose' heater hose and
water bYPass hose
WATEREYPASSHOSEUPPERRADIATORHOSE
14.
HEATERHOSE
Remove the engine wire harness connectors and
wire harness clamps from the cylinder head and the
intake manifold.
o Four fuel injector connectors
. Engine coolant temperature (ECT) sensor con-
nector
a
a
a
ECT switch connector
ECT gauge sending unit connector
Throttle position sensor connector
Manitold absolute pressure (MAP) sensor con-
nector
Primary heated oxygen sensor (primary HO2S)
connector
Secondary heated oxygen sensor (secondary
HO2S) connector (D16Y7 engine)
Exhaust gas recirculation (EGR) valve lift sensor
connector (D16Y5 engine)
. VTEC solenoid valve connector (Dl6Y5, D16Y8
engrnes)
. VTEC pressure switch connector (D16Y5. D16Y8
engrnes,
. ldle air control (lAC) valve connector
15.Remove the spark plug caps and distributor from
the cylinder head.
Remove the uPPer bracket.
NOTE:
. Use a jack to support the engine before the
upper bracket is removed.
. Make sure to place a cushion between the oil
pan and the jack.
12 x 1.25 mm
74 N.m {7.5 kgf m.
sil lbl.ftl
UPPERBRACKET
'17. Remove the cylinder head cover'
CYLINDERHEAD COVER
(cont'd)
6-29

WATER BYPASS
HOSE
14. Remove the upper radiator hose, heater hose and
water bvpass hose.
HEATER
Remove the engine wire harness connectors and wlre
harness clamps from the cylinder head and the intake
manifold.
Four fuel injector connector
Engine coolant temperature (ECT) sensor connec-
tor
ECT gauge sending unit connector
ECT switch connector
ldle air control (lAC) valve connector
Manifold absolute pressure (MAP) sensor connec-
tor
Throttle position sensor connector
Primary Heated oxygen sensor (Primary HO2S)
connecror
VTEC solenoid valve connector
15.
a
a
a
a
a
\
16.
17.
Remove the spark plug caps and distributor form
the cylinder head.
Remove the upper bracket.
NOTE:
. Use a jack to support the engine before removing
the upp€r bracket is removed.
. Place a cushion between the oil panandthejack.
12 x 1.25 fin74 N.m 17.5 kgtm,
UPPER BRACKET
18. Remove the cylinder head cover.
{cont'd)
6-69

815A2 engine:
WATER OUTLETCOVERApply liquid gasket
to mating surface.
6x1.0mm9.8 N.m {1.0 kgl'm,7,2 tbl.ftt
ECT GAUGESENDING UNIT9 N.m (0,9 kgf.m,7 rbf.ft)Apply liquid gasket
to the threads.
rENGINE COOLANTTEMPERATURE (ECT)
SENSOR18 N.m {1.8 kgf.m,13 tbtftl
6x1.0mm12 N.m (1,2 kgd m,
8.7 tbf.ftl
16@
aY@
t"S X 1.0 Mrf WATEN PUMP
iiil:i'iij rnr.., Inspection, pase 10'1'r
8.7 tbf.ftl
\lo
10-13

\J
Fuol Iniection Air {FlA) Contlol Valve T$ting
1. Start the engine.
2. Remove the vacuum hose from the fitting on the
intake air duct, and connect a vacuum gauge to the
nose.
NOTE: Engine coolant temperature must be below
149"F (65"C).
VACUUM PUMP/GAUGE,
0-30 in.Hg.A973X - 041 -XXXXX
Raise and lower the engine speed, and make sure
the vacuum gauge reading changes as the engine
speed changes.
lf vacuum reading does not change check these
rtems:
. The vacuum lines of FIA system for misrouting,
leakage, breakage and clogging.
. The FIA controt valve for cracks or damage
. The cooling system (see section 10).
Hold the engine at 3,OOO rpm with no load (in Park
or neutral) until the radiator fan comes on, th€n let
it idle and recheck.
lf vacuum reading changes check these items:
a The FIA control valve for cracks or damage.
. The cooling system (see section 10).
11-251

\
EVAP CONTROLCANISTER VENT SHUTVALVE 2P CONNECTOR IC141I
Wire side of temale terminals
ECM,/PCM CONNECTORS
tG1IBLK/WHT}
A973X -
0/r1 - XXXXX
Wire side of femaletermrnats
\
?,T-t
fl
VACUUMPUMP/GAUGE, 0 -30 in.Hg
\(cont'd)
11-289
{From page l1 288}
{To page 11-290)
Ch€ck the vac[um when cold:1, Disconnect the vacuum hoseshown from the EVAP controlcanister and connect a vacuumgauge to the hose.2. Start the engine and allow it
to idle.NOTEi Engine coolant temperature must be below 154"F(68'C) or Ay'C switch OFF.3. Ouickly raise the engine speedto 3,000 rpm.
(From page 11-288)
Check for an open in tha wire(lGt linol:1. Turn the ignition switch OFF.2. Disconnect the 2P connectorfrom the EVAP control canis-ter vent shut valve.3. Turn the ignition switch ON lll).4. Measure voltage between theEVAP control canister vent shut
valve 2P connector terminalNo.2 and bodyground.
Repair open in the wire betweenthe EVAP control canister ventshut valve .nd the No. 15 ALTER-NATOR SP SENSOR {7.5 A)fu3e.
ls there battery voltage?
Ch€d( for an op€n in the wiie IVSVlinel:1. Turn the ignition switch OFF.
2. R€connect the 2P connectorto the EVAP control canistervent shut valve,3. Turn the ignition switch ON (ll).
4. Measure vo ltage betweenECM/PCM connector termi-nals A4 and 82.
Repair open in the wire bctweenthe EVAP control canistor ventshut valve and lhe ECM/PCM{44t.
ls there battery voltage?
Rcolaco tho EVAP control canis.t6r vent shut valvo.
a t32P)
-

JGau ge/lndicator/Terminal
With tachometer;
CONNECTOR "A"
{A/T GEAR POSITION INDICATOR}
Location lndex
CONNECTOR "8"
{GAUGE and INOICATOR)CONNECTOB "C"
CONNECTOR "D"
{ABS INDICATORI
SPEEDOMETER:Indicates 60 km/h at 637 rpm or
60 mph at 1,025 rpm o{thevehicle speed sensor (VSS).
A/T GEAR POSITIONINDICATORSee page 23 149
TACHOMETER:Indicates 100 rpm at200 pulses per minuteol the ignition controlmodule (lCMi.FUEL GAUGEENGINE COOLANT TEMPERATURE (ECT) GAUGE
(cont'd)
23-129
(GAUGE end INDICATORI
A1-----------+816
JlltlllulllllrL
c1 --------->c13
1ililil{ilrL
oooo o 0006^
)og @ @ o^o @ )'l |. o
Fl- - -> F5E1_ _ -->E5D1- --+05
oo/ \oo
Gauge/Sending Unit Test, page 23-142

Gauge Assembly
Disassembly (With Tachometerl
NOTE: Handle the terminals and Drinted circuit boards
carefully to avoid damaging them.
A/T GEAR POSITION INDICAMOUNNNG SCREWStx 2)
FUEL and ENGINE COOLANT TEMPEMTUREGAUGE MOUNTING SCREWS {x 6,TACHOMETEB MOUNTINGSCREWS lx 3l
ao
,-ook+r
.,- ll $
t'{"{q.' ElI ..il \:r
A/T GEAR POSITION INOICAPRINTED CIRCUIT BOARD
INDICATORPRINTED CIRCUIT BOARD
@ FUEL end ENGINE COOLANT TEMPERATURE (ECTI
PRINTEO CIRCUIT
q,
6\
ABSCRUISE or SHIFT-UP INDICATORPRINTED CIRCUTT EOARD
TACHOMETERSpecilication, page 23 129
METER PANEL
booo .--:o'-..oooo.A
:-F.-sr'; "€?;"')
aFl l!
GAUGE
23-134

JDisassembly {Without Tachometerl
NOTE: Handle the terminals and printed circuit boards
carefully to avoid damaging them.
SPEEDOMETER MOUNTINGSCREWS (x 4)
A/T GEAR POSITION INDICAMOUNTING SCREWS {x 2l
SRS INOICATORPRINTED CIRCUIT BOARD
ENGINE COOLANT TEMPERATURE {ECT}
GAUGE
ABS INDICATORPRINTED CIRCUIT BOARD
PRINTED CIRCUIT
METER PANEL
FUEL GAUGEMOUNTING SCREWS {x 3)ENGINE COOLANT TEMPERATUR€GAUGE MOUNTING SCREWS {x 3l
A/T GEAR POSITION INDICATOR
PRINTED CIRCUIT BOARD
'a@
.-@--o
o"i^>
Er t
lmwp\
d*re
\*P
\
FUELTest,GAUGEpage 23-142
oOo ,.-'€'-., oOOo -/\
€3,'" ' "$?'----"')
)a.' '.,,'+ ':j
\ll Lto
BOARD
METER LENSMETER VISOR
23-139