HONDA INTEGRA 1994 4.G Workshop Manual

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23-145

Integrated Control Unit
Input Test
CAUTION:
a All SRS elocttical widng hatness€s ato covored with
yollow insulation.
a Botolo disconnocring any pan ot the SRS wile hal'
ness, conn€ct tho shon connoctor(3l.
a Replaca tho ontlrg affsctod SRS hE noaa assombly if
it has an opon circuit or damag6d wifng.
Remove the dashboSrd lower cover and knee bolstar.
then disconnect the 1 5-P connector Jrom the integratsd
control unit.
Remove the integrated control unit from the under-dash
Juse/relav box.
Inspect the connector and socket tetminals to be sure
they are all making good cont8ct.
a lf the terminals are bent, loose ot corrod€d, repair them
as necessary, and recheck the system
a lf the terminals look OK, make the tollowing input tssts
at the connector and under-dash tuse/relsy box.
- lf any test indicates a problem, find and correct the
cause, then recheck the system.- It all the input tests prove OK, the control unit must
be faulty; replace it.
15.P CONNECTOR
NOTE:
a Diftorent wires with the sam€ color have been given
a number suffix to distinguish th€n {for 6xample,
GRN/BLUI and GRN/BLU'are not the same).
a Do not disconnect any connectors on tho under-dash
fu8e/relay box except the integratsd contlol unit.
BLU/WHT I BLU/GR]{ I BLU/YEL I LT GB /BED
23-146
SRS MAII{ HARI{ESS
H_____-t{
.BLK/GBI{ LT
YEL/BLU GRN/BLUI GRI{/RED

1NUnder all conditionsCheck for continuity to ground:
There should be continuitv.
. Poor ground (G201, G4O1). An open in the wire
Under all conditionsCheck for voltage to ground:
There should be battery voltage.
. Blown No. 3 (7.5 A) fuse in the
under-dash fuse/relay box. An oDen in the wire
F
lgnition switch ON {ll)Check for voltage to ground:
There should be bsttery voltage
. Blown No. 15 (10 A) tuse in the
under-dash fuse/relay box. An open in the wire
All Systems:
No. TsrminalT€st condition
R€ar Window Detogger Timer System:
No. WireTost condition
Intermittent Wip6r Relay System:
Wir€/
No. TerminalTest condition
T6st: Desired rosult
Test: Dosiled result
T€Et: Desir6d result
Possibla cause it result is not obtained
Possible cause il rosult i8 not obtained
Possiblo cause if rosult is not obtained
(cont'd)
IYEL
Defogger switchpushedCheck lor continuity to ground:
There should be continuity asthe switch is Dushed.
Faulty defogger switch
Poor ground {G201, G4O1}
An open in the wire
BLUiYEL
lgnition switch ON (ll)Connect to ground: The rear
window defogger should work
and the detogger switch indica-
tor light should come on.
Blown No. 13 {7.5 Al fuse in the
under-dash fuse/relay box
Faulty defogger relay
Blown bulb
An open in the wire
,|YEL/BLU
lgnition switch ON (ll)
and windshield wipet
switch INT
Check tor voltage to ground:
There should be battery voltage
Bfown No. '14 l2O Al fuse in the
under-dash fuse/relay box
Faulty windshield wiper switch
An oDen in the wire
BLU/WHT
ano
BLUiGRN
Windshield wiper
switch OFF or INT
and wiper blades inpark position
Check for continuity between
the BLUMHT and BLU/GRN ter-minals: There should be
continuity.
Faulty windshield wiper switch
Faultv windshield wiDer motor
An open in the wire
.Elgnition switch ON (lllCheck for voltage to ground:
There should be battery voltage.
. An open in the wire
*BLK/GRNlgnition switch ON (ll)
and windshield washer
motor switch ON
Check for voltage to ground:
There should be battery voltage.
. Faulty windshield washer switch. An open in the wire
*: With combined washer-wiper operation
23-147

Integrated Control Unit
Input Test (cont'd)
Engine Oil Pressure Indicator Flashal System:
Wire/
rWith combined washeFwipot operation
Test: Desired resultPossiblo c€use if r6rult is not obtainodNo. TelminalTsst condition
M
1Engine runningCheck for voltage to ground:
There should be battery voltage
. Faulty charging system. An oDen in the wire
YEL/RED
lgnition switch oFFCheck for continuity to gtound:
There should be continuitv.
. Faulty engine oil ptessure switch
. An oDen in the wire
lgnition switch ON (ll)Check indicator light. lf the light
does not come on, Sttach the
YEL/RED terminal to ground:
The light should come on as the
ignition switch is turned ON.
. Blown bulb. An open in the ware
Start the engine.Check for voltage to ground:
There should be battery voltage
Insufficient oil
lmproper lubrication
Faulty engine oil pressure switch
Key-in/Seat Bolt Reminder Systam:
No. WilaTest condition
NOTE: Refer to page 23-125 for the seat belt switch test.
Test: Dosired lesuhPossible causo if resuh is not obtainod
23-148'
GRN/BLU'Driver's door openCheck for continuity to ground;
There should be continuitv.
. Faulty driver's door switch
. An ooen in the wire
LT GRN/
RED
Front passenger's door
switch open
NOTE: Betore testing,
remove No. 3 (7.5 A)
tuse from the under-
dash fuse/relay box.
Check tor continuity to ground:
There should be continuitv.
. Faulty lront passenger's door switch
. An ooen in the wire
LT BLU
lgnition key inserted
into the ignition switch
Check for voltage to ground:
There should be 1 V or less.
Faulty ignition key switch
Poor ground (G201 , G401)
An ooen in the wite
RED/BLU
lgnition switch ON (ll)
and driver's seat belt
unbuckled
Check lor voltage to ground:
There should be 1 V or less.
Faulty seat belt switch
Poor ground {G551)
An open in the wire
;.rqFft,

Bulb Check System
No. Tsrminal
(blake system lightl
Test condition
Lights-on Romind6r Systom:
Wire/
No, ToiminalT6Et condition
Side Markol Light Flashar System:
Wiro/
No. TerminalTest condition
Tost: Desirod resuhPossibls caus6 it result is not obtainod
Tost: Dositod rosuhPossibl6 caus6 if rosuh is not obtainod
Tast: Desired rosultPo$ible cause if result is not obtained
IM
lgnition switch at
STARTCheck lor voltage to ground:
There should be battery voltage.
Blown No. 18 {7.5 Al fuse in theunder-dash fuse/relay box
Faulty clutch int€rlock switch or
starter cut relay {M/T}Faulty neutral position switch (A/T)
An open in the wire
D
lgnition switch ON (ll),
brake fluid reservoir
tull, and parking brake
lever down
Connect to ground: Brake
system light should come on.
. Blown brake system light. An oDen in the wire
GRN/8LU'Driver's door openCheck for continuity to ground:
There should be continuity.
. Faulty driver's door switch. An oDen in the wire
H
Combination light
switch ON.
Check for voltage to g.ound:
There should be battery voltage
Blown No. l9 (1O A) tuse in the
under-dash fuse/relav box
Faulty combination light switch
An oDen in the wire
5
Connect the I terminal
to the J terminal.
Check chime operation: Chime
should activate each time the
batterv is connected,
. Faulty chime. An open in the wire
1H
Combination light
switch ON
Check for voltage to ground:
There should be battery voltage
. Blown No. 19 (1O A) tuse in the
under-dash fuse/relay box. An open in the wire
GRN/BLU1
lgnition switch ON {ll)and turn signal switch
to "Left"
Check for voltage to ground:
It should change from
O-12-O V repeatedly.
Blown No. 26 (10 A) luse in theunder-dash fuse/relav box
Faulty turn signal/hazard relay
An oDen in the wire2GRN/YEL
lgnition switch ON {ll)and turn signal switch
to "Right"
4GRN/WHTlgnition switch ON (ll)
and turn signal switch
to "Left (or Rightl":
Connect the H terminal
to the GRNMHT(or GRN/REDl) terminal.
Check the front side marker
light: Left (or Right) front sidemarker light should come on asthe batterv is connected.
Blown bulb
Poor ground (G2O1, c3O1, G4O1lAn open in the wire
GRN/REDl
23-149

Key-in Reminder System
lgnition Key Switch Test
NOTE: Refer to page 23-145fot a diagram of the key-
in leminder circuit, and to page 23-148 Jor the input test
ol the beeper circuit.
When the ignition key is not removed, the key-in reminder
in the integrated control unit senses ground through the
closed ignition key switch. When you open the driver's
door, the beeper circuit senses ground through the closed
door switch, With ground at the "LT BLU" and "GRN/
BLU" terminals, the beeper sounds.
1 . Remove the dashboard lower cover and knee bolster
(see page 23-70).
2. Disconnect the 7-P connector from the main wire
harness.
Check for continuity between the No. 2 and No. 4
terminals in each condition acco.ding to the table.
l.
Door Switch Test
Open the door.
Remove the screw, then pull out the door switch.
Disconnect the 1-P connector from the switch.
4. Check lor continuity between the positive terminal
and the base plate (ground) in each switch position
according to the table.
BASE PLATE
Position
TerminalPOSITIVEBASE PLATE
PUSHED {door closedl
RELEASED ldoor o!en)oo
Terminal
Condition
4
KEY INSERTED--o
KEY REMOVED
23-150

Engine Oil Pressure
Indicator System
Description
NOTE: Reter to page 23-144 tor the circuit diagram otthe engine oil pressure indicator flasher, snd to page
23-148 lor the input test of the flasher circuit.
The low engine oil pressure indicator tight works in twoways. lt will flash continuously following a momentaryloss of oil pressure, or it will go on and stay on with acomplete loss of oil pressure.
When the engine first starts, before oil Dressure risesabove 29.4 kP8 10.3 kgf/cmr, 4.3 psi), current flowsthrough the low engine oil pressure indicator light andthe oil pressure switch to ground. This tests the circuit.
Wilh the engine running, voltage is applied ro the ftash-er circuit of the integrated control unit. With normal oilpressure, the oil pressure switch is open and the low en-gine oil pressure indicator light does not operate. lf theoil pressure switch closes momentarily (more than O.5secondsl, but then opens again, terminal "yEL/RED,'will
sense ground through the switch. The integrated con-trol unit willthen provide and remove ground for th€ lowengine oil pressure indicator light through terminal"YEL/RED". The light will flash on and olf until the igni-tion switch is turned to "OFF".
lf engine oil pressure falls below 29.4 kPa (O.3 kgJ/cmr,4.3 psi) and does not increase, the oil pressure switchwillstsy closed. The low engine oilpressure indicator lightwill go on and stav on.
NOTE; Refer to page 23-122lot the engine oil pressure
switch test.
Lights-on Reminder
System
Description
Chime Test
Remove the dashboard lower cover and knee bolster
{see page 23-70).
Disconnect the 2-P connector t.om the dashboardwire hamess.
Test the chime by connecting battery power to the"A" te.minal and ground to the "B" terminal, andcycling the power on-off repestedly.
lf the chime fails to sound every time power is cy-cled, reDlace it.
NOTE: Refer to page 23-145 tor a diagram of the lights-
on reminder circuit, and to page 23-149 for the input
tests of the circuit.
When the ignition key is turned to OFF 8nd removed. withthe lights on, voltage is apptied to the reminder circuitin the integrat€d control unit. When you open the driver,sdoor, the circuit senses ground through the closed doorswitch.
With voltage at the "H" terminal, ground at the"GRN/BLU2" terminal and no voltage at the ,,F,' termi-nal, the chime sounds to remind the driver to turn oJf thelights.
CHIME
23-151

Lighting System
OAYTIMERESISTOR lC.nodalTest, page 23-160
HEAOLIGHTSAdjustment, page 23-162Replacement, page 23-164
Component Locations Index
All SRS el€ctrical wiring harnesses ale covered with
yallow insulation.
B€fore disconnocting any pan of th€ SBS wire har-
ness, connect the short connactor(sl.
Replac€ th6 entire affocted SRS harness assembly it
it has an open circuit or damagod wiring.
HIGI{ BEAM INDICATOR LIGHT(ln the gauge assembly)Bulb Locations, page 23-1 15
COMBINATION LIGHT SWITCHReplacement, page 23-160Test, page 23- l58
FRONT PARKING/FRONT TURNSIGNAL LIGHTReplacement, page 23-165
FRONT SIDEMARKER LIGHTReplacement, page 23-165
DAYTIME RUNNIT{G LIGHTSCONTROL UNIT {C6nada)Input Test, page 23-156
23-152
-

Hatchback:
Sodan:
LICENSE PLATE LIGHTSReplacement. page 23-169
TAILLIGHT. Replacement, page 23-166. Eulb replacement, page 23-166
LICENSE PLATE LIGHTSRoplacement, page 23'169
INI{ER TAILLIGHT. Replacement, page 23-167. Bulb replacement. page 23-168
TAILLIGHT. Repfacement, page 23-167. Bulb replacement, page 23-168
23-153

Lighting System
Circuit Diagram (USAI
UNOER - HOOD RJSE/NELAY 8OX
-r lo| ,-. otFDIMMER I'I
No.2l|l0A]iil;
)
ttNo.lo '1 No,22 ''t No.gtloAr (0oA) (floAr
IT
HEADLIGHTRIGHTHEAOUGHT
HIGH EEAMINOICATORLIGHTfi.4W)@il,", @f,*,6il* 6p*
. PAR(II{G UGHI. TAILUGI{TS. UCENSE PI.ATE
UtrloER - D SHRJSE/RELAYsox
REO/GNN
8LK
I
G20lG401
DASH UGI{TS88rGr{T ESSCONTrcUTRDASH UGHTSPAR(II{C UGHTSTAItUGt{TSUCENSE PI.ATEUGHTS
8tK
G301G20'|G40l
23-154