1994 HONDA INTEGRA Workshop Manual

BothFans
Both tans do not run at all.
Remove the A,/C diode from theA,/C diode 3P connector.
ls the !y'C diode OK?
Rep.ir op€n in tho 8LU/RED wircbelwoen tho A/C diod. lnd th.A/C o.$sure lwitch.
22-13

Troubleshooting
Gompressor
R6move the comPressor clutch
refay and test it (see Page 22-19l..
Measuro the voltage bgtlveen th€
WHT wire terminal {+) and body
ground {-}.
Rap.ir op.n in ih. WHT wit.
batwaan tha undar-hood fuaa/
ralay box and thg comptaalol
clutch r.l.y.
Connect tho WHT and 8€D wire
terminals with a jumPer wire.
Disconnect the comPressor
clutch 1P connsctor.
Check for continuity in the RED
wiro botween the comPressorclutch relay and the comPressorclutch.
Replir op.n in th. REO wi.c
batwaan tho comPrdaor clutchrol.y and the compr.33oi clulch.
Inapact tha compter3oa clutchclelranca !nd ihc comPacaaorctutch fi€ld coil {!.. P.9.22'32}.
BLK/YEL {+l
WHT l+l
BLK/RED
View from wir€ side
View lrom wire side
To page 22-15
22-14

Frcm page 22-11
Bdt ry vohro.?
_@_____-l
Turn the ignition switch ON (lI).
M€asure the voltage betweon th6BLK/YEL wire terminsl {+) andbody ground (-).
R.p.i. opcn in th. 3LX/YEL wirrbalwarn tha undar.da3h tuaa/.clay box and iha como.aaao.clutch rahy.
ls there battery voltage?
Turn the ignition switch OFF andinstall the comprossor clutchrelay.
Connect the test harness "A" and"8" conoectors to th6 main wireharness only, not to the ECM (s6gsection 11).
Turn th6 ignition switch ON (II).
Measure the voltagG between theA15 terminal (+) and bodyground (-1.
R.prir op.n in th. BLK/RED wirtb.twran the compraa.or clotch..1.y .nd th. ECM.
Make sure the A/C and heate. tenswitch6s are OFF.
Measure tho voltage b€tween the85 terminsl (+) and body ground(-).
R.p.ir op.n in th. BI-U/RED wir.b.tw.rn th. A/C diod. .nd th.CCM.
Sub.titute r known-good ECMand rocheck. lt lymptom/indicr-tion go€3 rwry, rapbca th. origi-nrl ECM.
Blttary vohago?
r_--@_Bs {+)
TEST HARNESS07t4, - PT3010a
" , -1llltf,'tfrSfiiwiafi
22-15

Troubleshooting
A/G System
10 page 22-17
A/C ay3t6m doe3 not como on(compro!3or and both f.ns).
Disconnect the A/C pressure
switch 2P connector.
Turn the ignition switch ON (II).
Measure the voltage beoveen the
BLU/RED wire terminal (+) and
bodv ground 1-).
Reprir opon in thc 8LU/RED wire
batwoan tho A/c prossute
rwitch rnd th. A/C diod..
Turn the ignition switch OFF.
Check lor continuity betwoen the
No. 1 and No. 2 terminals of the
A,/C pressure switch.
Check for NC system Pressure.
Reco n nect the A/C pressure
switch 2P connector.
Rophce tha A/C pre3!u.6 awitch.
View from wire side
YEL/WHTBLU/RED {+l
22-16

From page 22-15
Turn the ignition switch ON (IIl.
Measure tho voltage betweon theBLK/YEL wire terminal (+) andbody ground (-).
R.p.i. op.n ir th. BLX/YEL wirobatwc.n tha unda.-darh fuao/r.l.y box .rd rh. A/C th.rmo.t!r.
Measure th€ voltage between theYEL/WHT wire terminal {+} andbody ground (-).
R.prir op.n in th. YEL/WHTwiro bctwaan tha A/C praaau.crwhch .nd th. A/C th..mo.ht.
ls there battory voltage?
T!rn the ignition switch OFF.
R€connect the Ay'C thermostat 3Pconn€ctor and connect the BLU/RED wire terminal to ground witha l!mper wire,
Do the radiator and con-donser fans run and thecompressor clutch engage?
Turn the ignition switch OFF anddisconn6ct the jumper wire.
YEL/WHT l+l
View from wir€ side
To page 22-18
(cont'd)
22-17

Troubleshooting
Remove the heater control Panel(see page 21 25)
Disconnect the heater controlpanel 14P connector'
Turn the ignition switch ON (lI).
Measure the voltage between the
BLU/RED wire terminal (+) and
body ground { }
Rop.i. opon in tho BLU/BED wir.
b.twoon tha A/C thermort.t lnd
the haat.r control Panal
Turn the ignition switch OFF.
ls the A/C switch OK?
Check for continuitY in the GRN
wire between the heater controlpanel and the heater fan switch
R.prir op.n in the GRN wiro be'
twoen thc hartet contlol Panaland tho h.rtor fln switch.
Check for continuity in the BLK
wire between the heater {an
switch and body ground.
Chock fol an opon in the BLK
wi.a b.tween th. hotte. hn
lwitch tnd bodY ground. ll tho
wiro it OK, chock for Poorg.ound .t G4ol .nd G402.
Replace the heater lan switch.
Frcm page 22'17
View lrom wire side
A/C System (cont'dl
No. 11 BLU/RED l+l
22-18

A/C Thermostat
Test
Connect battery power to terminal C and ground termi-
nal B, and connect a test light between terminals A and
NOTE: Use a 12 V, 3W- 18Wtest light.
Dip the A-/C thermostat into a cup filled with ice water,
and check the test light.
The light should go off at 37"F (3"C) or less. and should
come on at 39"F (4"C1 or more.
lf the light doesn't come on and go off as specified,
replace the Ay'C thermostat.
There should be continuity between the A and C term!nals when power and ground are connected to the Band D terminals.
There should be no continuity when power is discon-nected.
. Radiator fan relay
Condenser fan relay
Compressor clutch relay
Relays
a
a
,I Ir-b
InP.I I
12V.3W-18W
ABC
22-19

Diode
Test
NOTE: The diode is designed to pass current in one
direction while blocking it in the opposite direction.
Use an analog ohmmeter, or a digital ohmmeter
equipped with a diode tester.
Check for current flow in both directions between the A
and B. and B and C terminals. There should be current
flow in onlv one direction.
A/C Switch
Test
NOTE: The Ay'C switch contains a diode. Use an analog
ohmmeter, or a digital ohmmeter equipped with a diode
tester.
Check for current flow in both directions between termi
nals 11 and 12. There should be current flow in only one
direction.
Terminal
Position11
ONo
OFF
22-20