HONDA INTEGRA 1994 4.G Workshop Manual

Heater Unit
Overhaul
Remove the screw and the damper arm cover.
Disconnect the link from the dampar arm, and re-
move the screw and the damper arm.
Removs the two screws and the heater core cover.
Remove the screw and the pipe clamp.
Pull out the heater core.
NOTE: Be careful not to bend the inlet and outlet
pipes during heater core removal.
Assemble in the rev€rse older of disassembly.
1.
?
4.
HEATER CORE COVER
DAMPER ARM COVER
HEATER CORE
DAMPEF ARM
21-24

Defroster Door Adjustment
Set the mode control switch on HEAT.
Loosen the adiusting screw.
Turn the adjusting arm to the left, as shown, so that
there will be no heat leakage from the defroster door,
Tighten the sdjusting screw.4.
CE]TTER AIR VEI{T
4. Remove the four self-tapping screws and the centerair v€nt.
Install in the reverse order of removal. and adjust theair mix control cable at the heater unit lsee page21-27). lf necessary, adjust the heater valve cablelsee page 21-27).
REAR WITIDOWDEFOGGERswtTcH
Heater Control Panel
Replacement
Disconned the air mix control cable from the heat-er unit lsee page 21-271.
Remove the rear window defogger switch and thehazard warning switch.
Remove the two self-tapping screws, then pull outthe heater control panel and the center air vent. Dis-connect the connectots, and remove the heater con-trol panel and the center air vent.
NOTE: The locking tabs of the hazard warningswitch and heater control panel connectors are onthe bottom.
AD.'USTII{G ARM
ADJUSTI G SCREW
AIR MIX CONTROL CABLE
CENTEB AIR VE T
21-25

Heater Control Panel
Overhaul
HEATER FAN SWITCHTest, page 21-30
AIR MIX CONTROL CABLE
Adjustment, page 21-27
Air Mix Control Cable Replacom€ni
1. Remove the ait mix control caDle'
2. Hook the tip of the new air max control cable to the temperature control lever, and push the cable housing until it
is locked.
AIR MIX CO]IITROL CABLE
NoTE:Alterassemb|y,checkthatthetemperaturecontro||eve's|idessmooth|ythroughthe'u||strokefromright
to left.
21-26

Heater Valve Gable
Adjustment
Disconnect the heater valve cable from the heatervalve arm and the clamp, and from the heater con-trol arm and the clamp.
Set the temperature control lever to MAX. HEAT.
Turn the heater control arm as shown. and connectthe end of the heater valve cable to the heater con-trol arm.
Gently slide the heater valve cable housing back fromthe end enough to take up any slack in the heatervalve cable, but not enough to make the tempera-ture control lever move. Hold the end of the heatervalve cable housing against the stop, then snap theheater valve cable housing into the clamp.
2.
Air Mix Control Cable
Adjustment
'l . Disconnect the air mix control cable from the air maxcontrol arm and the clamp.
2. Set the temperature control lever to MAX, HEAT.
3, Turn the air mix control arm as shown. and connectthe end of the air mix cont.ol cable to the air mixcontrol arm.
4. Gently slide the air mix control cable housing backtrom the end enough to take up any slack in the airmix controlcable, but not enough to make the tem-pe.ature control lever move, then snap the air mixcontrol cable housing into the clamp.
NOTE: The heater valve cable should always be ad-justed whenever the air mix control cable has beendisconnected.
HEATER COIITBOLARMHEATEB VALVECABLE
AIR MIX CONTROLCABLEAIB MIX CONTROLARM
5. Turn the heate. valve arm as shown, and connectthe end of the heater valve cable to the heater valve
arm.
Gently slide the heater valve cable housing back from
the end enough to take up any slack in the heatervalve cable, but not enough to make the tempera-ture control lever move, then snap the heater valve
cable housing into the clamp,
NOTE: The air mix control cable should always beadjusted whenever the heater valve cable has beendisconnected.
CLAMP
21-27

Mode Control Motor
Test
Connect batterY power to the No. 4 terminsl of the
mode control motor and connect ground to the No'
8 terminal.
Using a jumper wire, short the No. 8 terminsl in-
dividually to the No. 1, 2, 3. 6 and 7 terminals, in
that order.
a Each time the short circuit is mad€, the mode con-
trol motor should run smoothly and stop.
NOTE: ll the mode control motor does not run when
shorting the tirst terminsl, short that t€rminal again
after shorting the other terminals.
The mode control motor is no.mal it it runs when
shorting the tirst terminal again.
lf the mode control motor does not run in step 2, re'
move it, and check ths mode control linkage 8nd
doors for smooth movement. It the mod€ control
linkage and doors move smoothly, replace th€ mod€
control motor.
Disconnoct ths mode control motot 8P connector,
and remove it from lhe heater unit.
Remove the two sclsws, mode control motot, and
flango coll8,.
MODE CONTROLiioroR
3. lnst8ll in tho rsvsrse order of removal. After inst8l-
lstion, make sur€ the modo control motor runs
smoothlv.
Replacement
21-28

Recirculation Control Motor
Test
Connect baftery power to the No. 1 terminal of therecirculation control motor, and connect ground tothe No. 2 and No. 4 terminals; the recirculation con-trol motor should run smoothly.
Disconnect the ground from the No. 2 or No. 4 ter-minals; the recirculation control motor should stooat FRESH or RECTRCULATE.
CAUTION: N6v€r conn€ct the batt6ry in ths oppo-aite direction.
NOTE: Don't cycle the recirculation control motorfor a long time.
It the recirculation conttol motot does not run in steD'1, remove it, and check the recirculation control link-age and door for smooth movement. lf the recircu-lation control linkage and doo. move smoothly,replace the recirculation control motor.
Replacement
Disconnect the 4P connector from the recirculationcontrol motor, and remove the wire harness clio fromit.
Remove the two screws, recirculation cont.ol mo,tor and flange collar.
SCREWS REC|RCULAT|OIICONTROL MOTOR
3. Instsll in the reverse order of removal. After instal-lation, make sure tha tecirculation control motor runssmoothlv.
4P CONNECTOR
21-29

Relay
There should be continuity b€tween the A and C termi-
nals when Dower and ground are connected to the B and
D terminals.
There should be no continuity when power is discon-
nected.
Heater Fan Switch
Check for continuitv bstween the terminals according to
the table below.
Terminal
PositionADBE
OFF
,lo--o
o--o
3o--o
4-o
rl
I
I
r?
21-30

Recirculation Control
Switch
Test
Check for continuity between the terminals according tothe table below.
Mode Control Switch
Check for continuity between the terminals according tothe table below.
Terminal
Position4J78
Heato--o
Heat/Defo---o
DefG-O
Vento---o
Heat/VentG---o
Terminal
Position456
Fresho---o
Recirculateo--- -o
21-31

Air Conditioning
*Evaporator
Repf acement .........22-26
Overhauf ................ 22-27
Compressor
Description ............ 22-28
fffustrated fndex ............................... 22-29
Replacement .........22-30
Cf utch lnspection ....................... ...... 22-32
Cf utch Overhaul ............................... 22-33
Ref ief Vaf ve Replacement ............... 22-34
A/C Compressor Belt
Repf acement .........22-35
Adiustment ............22-36
Condenser
Replacement ......... 22-37
A/C System Service
Evacuation ....,.......,22-38
Charging ................ 22-39
Leak Test ...............22-40
+: Read SRS precautions before working in
this area.

Special Tools
Ref. No. I Tool Numbel
Test Harness
Belt Tension GaugeOTLAJ - PT3O1OA
07JGG - 001010A
I
22-2