1998 HONDA CIVIC mode door

4. Remove the rear roof trim and clips, and remove
the roof trim and socket plug (moonroof model).
>: Clip locationsA> 2DllD,7 B > With moonroof, 'l
3D.5 Without moonroof,3
[il',fEl
t% .l €E .l':: =,/ _._- ,/
2D l3D l4Dl
REAR ROOFTRIM
3D:
t
REAR ROOF
TRIM
2D:
5.
7.
OUARTERIRIM PANEL
4D: Lower the rear pillar trim on both sides
3D: Remove the upper anchor bolts from the front
and rear seat belts (see pages 20-86, 89), then lower
the quarter trim panel on left side.
2D: Remove the upper anchor bolt from the front
seat belt (see page 20-86), then lower the quaner
trim panel on left side.
Lower the headliner.
Carefully remove the headliner through the passen-
ger's door opening (2Dl4D) or hatch opening (3D).
Installation is the reverse of the removal procedure.
NOTE:
. When inserting the headliner through the open-
ing, be careful not to fold or bend it. Also, be care-
ful not to scratch the bodY.
. Check that both sides of the headliner are
securely attached to the trim.
. When installing the roof trim, install the joint
toward the right side (moonroot model)
6.
8.
20-65

Troubleshooting -'96 - 98 Models
Symptom Chart
NOTE;
. Check the engine coolant level. and allow the engine to warm up before troubleshooting.
. Any abnormality must be corrected before continuing the test.
. Because of the precise measurements needed. use a multimeter when testing.
o Before performing any troubleshooting procedures check:- Fuses No. 41 11.5 Al, No. 55 (40 A) in the under-hood fuse/relay box. and No. 17 (7.5 A) in the under-dash fuse/relay
box- Grounds No. G401, G402- Cleanliness and tightness of all connectors
SymptomRomedy
Hot air flow is low.Blower motor runs. but one or more
speeds are inoperative.
Perform the procedures in the flowchart (see page 21-8).
Blower runs properly.Check for the following:. Clogged heater duct. Clogged heater outlet. Incorrect door position
No hot air flow.Blower motor does not run at all,Perform the procedures in the flowchart (see page 21-10).
Blower motor runs.Check for the following:. Clogged heater duct. Clogged blower outlet. Clogged heater valve. Faultv air mix door. Heater valve cable adjustment (see page 21-44). Air mix control cable adiustment (see page 2'l-441. Faulty cooling system thermostat (see section 10). Clogged evaporator (with air conditioning). Frozen evaporator {with air conditioning)
Mode control motor does not run, or one or more modes
are inooerative.
Perform the procedures in the flowchart (see page 21-13).
Recirculation control door does not chanqe between
FRESH and RECIRCULATE.
Perform the procedu.es in the flowchan (see page 21-16).
Both heater and A,/C do not work.Perform the procedures in the flowchart (see page 21-18),
21-6

Mode Control Motor
To page 21-14
MODE CONTROL MOTOR 7P CONNECTOR
'1
I2I57
BLK/YEL
Wire side of female terminals
Mode control motor does not run,
or one of more modes are inoPela-
Check the No. '17 (7.5 A) fuse in
the under-dash fuse/relaY box.
Reolace the fuse, and recheck.
Check lor an open in the wire:
1. Disconnect the mode controlmotor 7P connector.2. Turn the ignition switch ON (ll).
3. Measure the voltage betweenthe No. l terminal and bodyg rou nd.
Repair open in the wire between
the No. 17 tuse and the mode
control motor.ls there batterY voltage?
Check {or an open in the wire:1. Turn the ignition switch OFF.
2. Check for continuity between
the No. 7 terminal of the mode
co nlrol motor 7P connector
and body ground.
Check for an open in the wire
batwe€n the mode contrcl motol
and body ground. lf the wir€ is OK,check for poor gtound at G/U)l and
G402.
ls there continuity?
Test the mode control motor (see
page21-471.Check the mod€ control linkage
and doors:1. Bemove the mode controlmotor (see page 21-47).2. Check the mode control linkageand doors for smooth move
ls the mode control motor OK?
Do the mode control linkageand doors move smoothlY?
Reolace the mode control motor,
I34561
BLK
[]
(cont'd)

Troubleshooting -'96 - 98 Models
Recirculation Control Motor
Becirculation control door doesnot change between FRESH andRECIBCULATE.
check the No- 17 (7.5 A) fuse inthe under-dash fuse/relay box.
Reolace the tuse. and recheck.
Check for an open in the wire:1. 0isconnect the recirculationcontrol motor 4P connector.2. Tu.n the ignition switch ON (ll).
3. Measure the voltage betweenthe No. l terminal and bodyground.
Repair open in the wir6 betweenthe No. 17Iuse and the recircula-lion conlrol motor.ls there battery voltage?
Check lhe recirculation control
1. Turn the ignition switch OFF.2. Test the recirculation controlmotor {see page 21 48).
Check the recirculation controllinkage and door:1. Remove the recirculation con'trol motor {see page 21 48}.2. Check the recirculation controllinkage and door for smooth
Do the recirculation control linkage and door move smoothly?Reoair the r€circulation controllinkage or door.
RECIRCULATION CONTROL MOTOR4P CONNECTOR
BLK/YEI-
Wire side of temale terminals
Io page 21 17
21-16

Troubleshooting -'99 - 00 Models
Symptom
Mode control motor does not run, or one or more modes are inoperat've'
Recirculation control door does not change between Fresh and Recirculate'
Blower motor only runs on high speed position; it does not run in any other speed positions
Blower motor does not run at all.
Both heater and Ay'C do not work
See pags
a1_tq
21-21
21-29
21-31
21 35
Symptom Chart
For electrical malfunctions which are indicated by the self-diagnostic system, refer to self-diagnosis function (see next
page).
Note these items before troubleshooting a symptom'
. Check the engine coolant level, and allow the engine to warm up before troubleshooting'
. Any abnormality must be corrected before continuing the test
.Becauseoftheprec|semeasurementsneeded,UseadigitaImu|timeterwithanoutputoflmAor|essatthe20ko
range when testing
. Before performing any troubleshooting procedures check:
- Fuses No. 41 115 Al, No 55 (40 A)]n the under-hood fuse/relay box' and No 17 (7 5 A) in the under-dash fuse/relav
box- Grounds No. G401, G402
- Cleanliness and tightness of all connectors
21-19

Troubleshooting -'99 - 00 Models
Self-diagnosis Function
The heater control panel has a self-diagnosis function.
Running the Self-diagnosis Funqtion
Set the mode control dial to the Vent position, and turn the ignition switch ON fll). Within six seconds after turnang the igni_tion switch on. press the recirculation control switch the required number of times depending on the recirculation indicatorlight status:
.lftheindicatorlightisON,presstherecirculationcontrolswitchfivetrmes.
.lftheindicatorlightisOFF,presstherecirculationcontrol switch six rrmes.The recirculation indicator light will come on for two seconds. then blink the Diagnostic Trouble code {DTc} to indicate afaulty component. lf no DTc's are found, the indicator light will not blink after the initial two second liqht.
DTC Indication Pattern (S6e DTC 2l:
Recirculationindicato.light on
Recirculationindicatorlight off2 sec
,/1.5 soct
' 0,3 secWithin six seconds atter theignition switch is turned ON (lll,pross the recirculation controlswitch the required number ottimes depending on the rocircu-lation indicetor light status
0.3 sec
VENT POSITIONMODE CONTROL DIAL
RECIRCULATIONCONTROL SWTCH
DTC Troubleshooting Index
Diagnostic
trouble
code (DTCI
Rgcirculation
indicator lightComponent with problemPossible causeSee page
One blinkAir mix control motorObstructed door, laulty motor21-21
2Two blinksAir mix control motorOpen or short circuit21-23
ln case of multiple problems, the recirculation indicator light will indicate only one DTc with the least number of blinks.
Resetting the Self-diagnosis FunctionTurning the ignition switch OFF will cancel the self-diagnosis function, After completing repair work, run the setf diagnosisfunction again to make sure that there are no other malfunctions.
21-20
@
At
V'

Mode control motor does not run.
or one or more modes arc inope]a-
tive.
Check the No. 17 (7.5 A) fuse in
the under-dash fuse/relay box.
Replace the Iuse. and recheck.
Check for an open in the wire:
1. Disconnect the mode control
motor 7P connector,
2. Turn the ignition switch ON (ll)-
3. MeasLrre the voltage between
the No. 1 terminal of themode control motor 7P con
nector and body ground
Repair open in the wire between
the No. 17 luse and lhe mode
control motor.ls there battery voltage?
Check the mode control motor:
1- Turn the ignition switch OFF
2, Test the mode control motor(see page 21 47).Check lhe mode control linkage
and doors:1. Remove the mode controlmotor (see page 21 47).
2. Check the mode control linkage
and doors for smooth move
ls the mode control motor OK?
Do the mode control linkage
and doors move smoothlY?
ReDlace the mode control motor'
Check for a short to Power in the
wires:1. Iurn the,gnitjon switch ON(ll).
2, Disconnect the heater controlpanel20P connector.3. Check for voltage betweenthe No. 2, 5, 6, 7, I and 9 ter'minals of the heater controlpanel 20P connector andbody ground individuallY.Repair shorl to power in the
wire{sl between the heater con-
trol oanel and the mode controlmotor. This short also damagesthe heater control Pan6l. RePair
the short to power before replac'ing the heater control Panel
ls lhere any voltage?
MODE CONTROL MOTOR 7P CONNECTOR
t2315
BLK/YEL
Wire side of female terminals
HEATER CONIROL PANEL 2OP CONNECTOR
Wire side of female terminals
NO
(cont'd)
21-25Io page 21 26

Blower Unit
Overhaul
NOTE:
RECIRCULATIONCONTROL MOTORTest, page 21-48
aBefore reassembly. make sure that the recirculation control door and linkage move smoothly without binding.
When attaching the recirculation control motor, make sure its positioning will not allow the recirculation control door
to be pulled too far.
After aftaching the recirculation control motor, connect power and ground, and watch the movement of the recircula-
tion control door.
BLOWERTest, page 2'l 9{'96 - 98 modebl
POWER TRANSISTOR l'99 - 00 modeblTest, page 21-50
Test, page 21'10 ('96 98 models) orpage 21'31 ('99 00 models)
m
MOTOR
2134