ACURA INTEGRA 1994 Service Repair Manual

Heater Door Positions
(cont'd)
)
IHEATI
El
IHEAT/DEF)

N

UNOER - HOOO FUSE/REI.AY 8OX
Circuit Diagram
WtlT/BtK.+WtfT
UiIDEN - OASHFUSE/RETAY 8OX
RECIRCUI.ATIONcoMTBor- Moron
nrotG401
N0.13 (7.5A1
21-6
-]

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rt,/ ,f rr,/ ,/ tt f ,f tt,/ ,f II tv v I rv v I rv v I rv v I
UGHTI GswtTcH
IRED/BI.K
OASH IIGTTTSEnrGFr ESScoNTROU.IT
HEATER CONTROL PANEI.
21-7

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

Blower Motor Speed
iii
I!i
-l
I
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

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
!\i
-l
I
View from wire side
BLU/U,HT
Troubleshooting
Blower Motor Speed (cont'd)
21-10
--

Blower Motor
View from wire side
View from wire side
Blowor motor doos noi iun at all.
check the No. 37 (4o A) fuse intho under-hood fuse/relay box.
At th€ blower motor 2P connec-tor, connect the BLU/8LK wirc ter-minal to body ground wath ajumpe. wire.
Turn the ignition switch ON (ll).
Does the blower motor run?
Disconnect the blower motor 2Pconnector, and measure the vol-tago between the ELU/wHT wireterminal {+} and body ground
{-}.
Turn the ignition switch OFF.
Remove the blower motor relavfrom the under-hood fuse/relavbox and test it {see page 21-3O}.
Roplaco tho blowor motor rolay.
Measure the voltage betwgen theNo. 1 terminal (+) and bodyground (- ).
To page 21-12
To page 2l-13
"uf"'\'
,)
(cont'dl
21-11

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

From page 21-11
Tu.n the ignition switch ON (ll).
Measure tho voltage botwoon thoNo. 4 torminal (+) 6nd bodvground (- l.
Ropair opan in tho BLK/YEL wir.batworn lha undor-hood fuaa/ra-hy box snd tho undor-dr.htur./rolay box.
ls there battery voltage?
Turn the ignirion switch OFF.
Check for continuity between theNo. 2 torminal and body ground.
Ch.d( to. !n oF|rn in th6 BLK wirobatwagn lho undar-hood luro/ra-lry box lnd body ground. ll th.wlre it OK. chock tor poo. groundat G2Ol lnd G/lol.
Rop.ir opon in th. BLU/WHT wlr.betweon tho undsr-hood lura/l.-lay box and tho blowor motoi.