Page 1045 of 1413
Troubleshooting
Symptom Chart
NOTE: Check the engine coolant level and allow the engine to warm up before troubleshooting.
SYMPTOMREMEDY
Hot air flow is low.Blower motor runs, but one ol more
speeds are inoperative.
Follow the tlowchart (see page 21-9).
Blower runs properly.Check for the following:. Clogged heater duct. Clogged heater outlet. Incorrect door position
No hot air JlowBlowel motor does not run at all.Follow the flowchart (see page 2l-l1l
Blower motor runs.Check for the following:. clogged heatet duct. Clogged blower outlet. Clogged heater valve. Faultv air mix door. Heater valve cable sdjustment lsee page 2'l-271
. Air mix control cable adjustment (see page 21-27)
. Faulty thermostat (see section lO)
. Clogged evaporator (with air conditioning). Frozen evaporator (with air conditioning)
Mode control motor does not run, or one or more modes are
inooerative.
Follow the flowchart (see page 21-14).
Recirculation control door does not change between FRESH
and RECIRCULATE.
Follow the flowchart (see page 21- 17).
21-A
Page 1046 of 1413
Blower Motor Speed
iii
I!i
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To pago 21-1O
l|t|
\
\
Blowor motor run3, bul ono olmors rpoodt aro inoporotivo.
Turn the ignition swirch ON lll).and the heater tan switch OFF.
Does the blower motor run?
Turn the ignition switch OFF.
Measure the rosistance betwoenthe No. 2 and No. 4 terminals oIthe blow€r resistor.
ls there aDorox. 2-3 ohms?
Remove the heater conlrol pan€l{seo page 21-25}.
Turn the ignition switch ON (li).
At the heater fan switch 6P con-nector, ground each of thesewares individually in ths lollowingorder:. BLU wire. BLUMHT wir€. BLU/YEL wire. 8LU/BLK wi.e
To page 21-10
(cont'd)
21-9
Page 1047 of 1413
Does the blower motor run atprogressively higher speeds?Raplaca tho hollar fan rwitch.
Ropair opon or cau36 ol oxcoalivtrosbtanco in tho appaopaiatowire(3| b6twoon thg hostct lanswitch and tho blower todstor.
Turn the ignition switch OFF.
Remove the heater control panel(see page 21-25).
Check each wire for continuity be-tween the heater tan switch 6Pconnector and body ground.. BLU wire. BLUMHT wire. BLU/YEL wke. BLU/BLK wire
Raplaca tha haater lan awltch.
Bopair shon in the wir6{s} b€-lwo€n lho heatot lan switch rndth6 blowor ro3bto?.
From page 21-9
From page 21-9
View trom whe side
ilil
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I
View from wire side
BLU/U,HT
Troubleshooting
Blower Motor Speed (cont'd)
21-10
--
Page 1049 of 1413
From page 21-11
Turn the ignition switch OFF.
Remove the heater control pan6l(see page 21-25).
Turn the ignition switch ON (lll.
Measure the voltage b€twsen the8LU/BLK wire terminal l+) andbody ground {- ).
Rgp.lr op.n In lh. BLU/BLK wh.batwoen lh! blowar motor lndtho hcolar f.n .wltch.ls there battory voltage?
Turn the ignition switch OFF.
Check tor continuity in lhe BLKwire between the heater lanswitch and body ground.
Ch.ck tor an opan in lhr Bl-K wirobdtwaan tho hortar tln lwftch.nd body ground. lf tho wlra l.OK, ch.ck for poor ground .tG201 .nd /rO1.
Roplaco tho hsator tan lwitch.
Troubleshooting
Blower Motor (cont'dl
View trom wire side
BLU/BLK{ + }
21-12
Page 1052 of 1413
From page 21-14
NO
To psg6 2'l - 16
Check for continuity in the BLKwire betweon the mode controlmotor and body ground.
Chock lor an op6n In tho BLK wtbotwo€n tho modo control mototlnd body ground. It thr wlro i!OK, chock for poo. grouhd otG2O1 8nd G/tOl.
Test the modo control motor (seepage 21-281.
Romovo the mode control motor(soo pag6 21-281.ls the mode control motor OKI
Remove the heater control oanel{soe page 21-25).Ch€ck the modo control linkagoand doo.s tor smooth movoment.
Disconnect the heater controlDanel 14P connector.Do tho mode control linkageand doorc movs smoothlv?Ropair th6 mod6 controllinkago or doors.
Ch€ck each wire for continuity bo-twoon the mod6 control motorand body ground.. YEL/BLU wire. Y€L wire. 8LU,^/VHT wire. GRNI/EL wire. YEL/RED wire
Raplace thc modo control moto..
Roprir any .hort in th. wlrol!) b.-tworn tha moda control anototand tha holtar control pan6l.
Check the same wires lor vohage.
Roplir rho.t to powar In tha8LK^'EL wiro b.two.h lh. modoconlrol hotor rnd tha haat* con-trol p!rr.|. (Thi! damrg.. thahello. control p!nel.)
ls the.6 any voltage?
View lrom wi.e side
GRl{/YEL
lconl'dl
21-15
Page 1053 of 1413
View from wire side yELFrom page 21-'l 5
Check each wire for conlinuity be-tween the mode contiol motorand the heater control panel.. YEL/BLU wire. YEL wire. BLU/WHT wire. GRN/YEL wire. YEL/RED wire
R.psir any opon in fro wir6{.1 bo-twocn tho mod€ control motolsnd tho holtar contiol prnal.
Rsploco tho hoator conlrcl panol.
Troubleshooting
Mode Control Motor (cont'd)
21-16
Page 1055 of 1413
Troubleshooting
Recirculation Control Motor (cont'd)
Test the recirculation control mo_
tor (see page 21-29).
Remove the recirculation control
motor (see pag. 21-291.ls the recirculation controlmotor OK?
Check the recirculation controllinkage and door for smoothmovement.
Remove the heater control pan€l
{see page 21-25).Do the recirculationcontrol linkage and doormove smoothly?
Ropalr tho ioclrculatiooconirol linkaga ot dool.
Disconnect the heater controlpanel 14P connector.
Check for continuity in the
GRNMHT and GRN/RED wires
between the recirculation controlmotor 6nd body ground.
RoDair shorl in rhs GRNMHT
and/or GRN/RED witols) botwoenthe rocirculation conl.ol motot
and tho hoster control Panol.
Check the same wircs for voltage.
Ropair 3hon lo Power in thoBLK/YEL wiro botwoon ths rocit-
culalion control motoi and lheho6tor control Panel' {Thirddmagos tho h€atot cont.ol
oanol.)
ls there any voltage?
Check for contin!ity in the
GRN/WHT and GRN/RED wires
between the recirculation controlmotor and the heater controlpanel.
Ropair opsn in the GRi|/WHTand/o. GRN/RED wiro{sl botwoonths rocirculstion conttol mototand tho hoator control Panol.
Reolace th€ heatsr control Panal.
From page 21- l7
No. 5 GRN/RED
o. 6 GRI{MHT
View from wire side
View from wire sid6
GRN/RED
ffii
21-18
Page 1056 of 1413
Heater Control Panel Input/Output Signals
No.Wire ColorSignslNo.Wire ColorSi9n8l
IBLU/WHTHEATINPUT8GRN/YELHEATA/ENTINPUT
2YELI{EAT/DEFINPUTqRED/BLKCOMBINATION LIGHT SWITCHINPUT
YEL/BLUDEFINPUT10REDBRIGHTNESS CONTROLLEROUTPUT
4BLKGROUNDOUTPUT11BLU/REDA/C THERMOSTATINPUT
5GRN/REDRECIRCULATEINPUT12GRNHEATER FAN SWITCHOUTPUT
oGRN/WHTFRESHINPUT1?
YEL/REDVENTINPUT't4BLK/YELtG2INPUT
21-19
![HONDA INTEGRA 1994 4.G Workshop Manual Blower Motor Speed
iii
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To pago 21-1O
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\
Blowor motor run3, bul ono olmors rpoodt aro inoporotivo.
Turn the ignition swirch ON lll).and the heater tan switch OFF.
Does the blower motor r](/manual-img/13/6067/w960_6067-1045.png "HONDA INTEGRA 1994 4.G Workshop Manual Blower Motor Speed
iii
I!i
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I
To pago 21-1O
l|t|
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Blowor motor run3, bul ono olmors rpoodt aro inoporotivo.
Turn the ignition swirch ON lll).and the heater tan switch OFF.
Does the blower motor r")
