ACURA INTEGRA 1994 Service Repair Manual

Low FuelIndicator
IndicatorLight Test
Seat Belt Reminder
System
Seat Belt Switch Test
J.
NOTE: Reter to page 23- 1 1 6 tor the wiring description
of the low fuel indicator circuit.
1. Park car on level ground.
@ oo not rmoko whil6 working on th€
fuol system, Keop op€n llamg3 awsy from your work
area. Drain fuel only into an approvod container,
Drain tuel into an 8pplov€d container. Then install
the drain bolt with a new washer.
Add less than 8.2 t (2.2 U.S.Gal, 1.8 lmp.Gal) of fuel
and turn the ignition switch ON (ll). The low fuel in-
dicator light should com€ on within lour minutes,
a lf the light does not come on, remove the access
Danel and disconnect the 3-P connector from the
fuel gauge sending unit, Connect the A
(BLKMHT) terminal to the C (BLU/WHT) termi-
nal with a iumper wir€.- lf the light comes on, the problem is either the
sending unit or its ground.- lf the light does not come on, the problem is
an open in the BLU/WHT wire to the gauge as-
sembly, no power to the gauge, or a blown
bulb.
a lf the light comes on, add approx. 4, {1.1
U.S.Gal, O.9lmp.Gal) ot tuel, the light should go
ofJ within four minutes.
3-P CONI{ECTOB
View lrom wire side
1.Slide the driver's seat to the middle position, then
disconnect the 2-P connector Jrom the back ot th€
sear.
Check for continuity between the A and B terminals
in each condition according to the table.
2.
NOTE: Befer to page 23-146 for the seat
reminder inout test.
3. lf necessary. replace the seat belt switch.
Terminal
C"** \AB
UNEUCKLEDo--o
BUCKLED
ANCHOR
23-125

GaugeTest
NOTE: Refer to page 23-116 fot the wiring description
oJ the engine coolant temperature (ECT) gauge circuit
diagram.
1. Check the No. 15 (10 A) fuse in the under-dash
tuse/relay box before testing.
2. Make sure the ignition switch is OFF, then discon-
nect the YEL/GRN wire from the ECT gauge send-
ing unit and g.ound it with a jumper wire.
Turn the ignition switch ON (lll.
Check that the pointer of the ECT gauge starts mov-
ing toward the "H" mark,
CAUTION: Tuln th6 ignition switch OFF botore th€
point reaches "H" on tho gaugo dial. Failuro to do
so may damago tho gaugo.
a It the pointer of the gauge does not move at all,
check Jor an oDen in rhe YEL or YEL/GRN wire.
lf the wires are OK, replsce the ECT gauge.
a It the ECT gauge works, test the ECT sending
untt.
J.
Engine Coolant Temperature (ECTI Gauge
ECT Sending Unit Test
Disconnect the YEL/GRN wire from the ECT send-
ing unit.
With the engine cold, use an ohmmeter to measure
resistance between the positive terminal and the en-
gine (ground).
Check the temperature of the coolant.
Run the engine and measure the change in ,esistance
with the engine ai operating temperatu.e {the radi-
ator tan comes on).
5. ll the obtained readings are substantially different
Jrom the specifications above, replace the ECT send-
ing unit.
23-126
POSITIVE TERMINAL
Temperatu.e1330F (560C)185.F (850C)-
2120F (1000c)
Resistance (O)'t3746-30

Brake System lndicator
Parking Brake Switch Test
Remove the tloor console, and disconnect the con-
nector from the switch.
Check for continuity b€tween the positive terminal
and body ground in each lever position accordino to
the table.
Canada:
lf the parking brake switch is OK, but ths brake sys-
tem indicator does not function, pertorm the input
test for the daytime running lights control unit (see
page 23-156).
L6vor position
TorminalPOSITIVEEODY
UP
DOWN
Brake Fluid Level Switch Test
Remove the reservoir caD.
Check that the tloat moves up and down freely, if
it does not, replace the reservoir cap sssembly.
Chsck for continuitv between the terminals in each
float position according to the table.
RESERVOIR CAPDOWN POSITION
when float drops.
4. lf necessary, replace the reservoir cap assemblv.
Terminal
Float positionPOSITIVENEGATIVE
UP
DOWN-o
POStTtVE
TERMINAL
Switch contacts open atproper fluid level.
23-127

Maintenance ReminderSystem
Gomponent Location Index
23-128
CAUTION:
a All SRS eloctrical wiring haln€sses are coveled with
y€llow insulation.
a Bsfore disconnocting any part of the SRS wire har-
ne6a, connect tho shon connoctor(s).
a Replace the entire affoctod SRS hsrness ass6mbly if
it has an open circuil or damag€d wiring.
MAINTENAf{CE REMINDER LIGHT(ln th6 gaugo 63.smblylGauge Assembly. page 23-113
VEHICLE SPEED SENSOR {VSS){On the t.ansmirsion houainglTest, page 23-120, 121Input Test, page 23-120Repfacement, page 23-122
MAINTENANCE REMINDER UNITlBohind tho dashboard lowor covor)Input Test, page 23-131
MAINT
REOD

Description
Based on signals recaived trom the vehicle speed sensor (VSS), the microcomputer in the maintenance remande, unit,which is located behind the dashboard lower cover, computes the distances traveled. When you turn the ignition switchon, the reminder light in the gauge assembly will come on for two seconds (bulb check tunction).Ar 9,650 t 160 km (6,000 t lOo miles) intervals, the reminder light witl gtow for two seconds and then btank ten sec-onds att€r you turn the ignition switch on. This will repeat every time you turn the ignition switch on until the car reaches12,O7O ! 160 km (7,500 1 10O mites).Beyond the 12,O7O ! 160 km (7,500 t IOO mite) interval, the tight will continue ro gtow after the butb check untilyou turn the ignition switch off or reset the unit.To reset the unit, the car must be pa.ked and the ignition switch must be on. Press the reset button on the unit for mo.ethan three seconds, and the reminder tight will go otf.
NOTE:
a Turn the ignition switch OFF b€fore you r€move the 5-P connector from the maintenance reminder unit. otherwiseyou will cancel all data in the memorv.a The data will remain in the memory even when the ignition switch is turned ofJ, or if the unit is disconnected. Whenthe ignition switch is turned on, and the car is driven. additional data will be stored.
-----------------lMAINTENANCE REMINDEN UN|T
sEt{son tvss
23-129

Maintenance Reminder System
Circuit Diagram
23-130
UNDER-HOOD FUSE/REIAY 8OX
MAINIET,IAT,ICE REMINOER UiIIT

Maintenance Reminder Unit Input Test
1.With the ignition switch OFF, disconnect the 5-P
connector from the reminder unit,
Inspect the connector and socket terminals to be
sufe they are all making good contact.
a lJ the terminals are bent, loose orcorroded, repair
them as necessary, and recheck the svstem.
a It the terminals look OK, make the following in-
Put tests at the connecto..- lf a test indicates a problem, tind and correct
the cause, then recheck the system.- It allthe input tests prove OK, the reminder unit
must be taulty; replace it.
View trom wire side
No.WireTost condltionTest: DaEired rasultPossibl€ cause if result is not obtained
IBLKUnde. all conditionsCheck for continuity to ground:
There should be continuitv.
. Poor ground (G201, G4O1). An open in the wire
WHT/BLU
Under all conditionsCheck tor voltage to ground:
There should be battery voltage
. Blown No. 32 (7.5 A) fuse in the
under-hood tuse/relay box. An open in the wire
YEL
lgnition ON (lllCheck for voltage to ground:
There should be batte.y voltage
. Blown No. 15 (1O A) fuse in the
under-dash fuse/relay box. An open in the wire
4PNK
lgnition ON (ll)Connect to body ground; The
reminder light should go on.
Blown No. 15 (1O A) tuse in the
under-dash fuse/relay box
Blown bulb
An open in the wire
EORN
lgnition ON {ll), car in
neutral with lront ol
car raised, one wheel
rotated with other
wheel blocked
Check for voltage to g.ound:
Meter should indicate pulsing
voltage.
. Faulty vehicle speed sensor (VSS)
. An oDen in the wire
23-131

A/T Gear PositionIndicator
Component Locationlndex
23-132
cAUTtOt{:
a All SRS olectdcal wiring harnossos a16 covarod with
yellow insulation.
Boforo disconnocting any part ot the SRS wlr. har-
noaa, conngct the short conn6ctor(sl.
Roplaco tho entire aff6ct6d SRS harn$s assombly il
it has an op6n cilcuit or damagod wiling,
SRS MAIN HARI{ESS(Cov.rod whh ygllow io.ul.tlonl
GAUGE ASSEMBLYBemoval, page 23-1 18Disassombly, pag€ 23'1 19Bulb Locations, pago 23-1 15IiIIERLOCK SYSTEMDGscription. page 23-139
A/T GEAR POSITIONIlTDICATORInput Test, pago 23-134
A/T GEAR P('SITIOI{ SWITCHTest, page 23-136ReDlacement, 6ection 14

UNOER_HOOD FUSE / REI.AY 8OX
Circuit Diagram
IGNITIONswrTcHUNOER-OASHFUSSREI-AY 8OX
No.19ll0A)FUSE
TMI{SMrSSr0r,lc0IJTRori.IODULEITCMI
fitMritc-;-CANCEL lgll
tlYELTWHT GRN/8L|(
D4
II._l
TRANSMISSIONMODU|.! [TCM}
t
INTERLOCKcoMtRotUNJ]_
IGRT'IMHTo*nn,o_yTT
pr{x/cR1 -J
IGR €|-U -l
GRiITYEt
LT GNNiW{T
No.19 {lFUSE
V
I
I
DASH I-IGHTSBRIGHTNESSCONTROI.IERG2o lG401
I
G201G40t
/-?t ftrt*lwHT/BLX +wHT+ CH- Bl.x/Y€t -+<.\-o+!
y "l
IYEL
lln tho gtugo 8ls€mbvl
AN GEAR POSITION INDICATOR DIMMING CIRCUIT
A/T GEANPOStTt0NcoNsot-ELIGHT0.4w)
M GEARPosrTroN swncH
23-133

A/T Gear Position Indicator
Indicator Input Test
CAUTION:
a All SRS electrical widng harn6ssos ara cov6r6d whh
yellow insulation.
a Before disconnecting any part ot the SRS wiro hEr-
ness. connect the shon connoctolls).
a Replace the entire affectod SRS harnosr assombly il
it has an op€n circuit or damaged wiring.
Remove the gauge assembly from the dashboard (see
page 23- l 1 8), and disconnect connectors "8", "C" and"D" from it. lnsoect the connecto. terminals to be sure
they are all making good contact.
a lf the terminals are bent. loose or corroded, repair them
as necessary, and recheck the system.
a lf the terminals look OK, make the following input tests
at the connector.- lf any test indicates a problem, find and corect the
cause, then recheck the system.- lf all the input tests prove OK, the gauge assem-
bly must be taulty; replace it.
CONI{ECTOR "8"
SS
23-134