key battery ACURA INTEGRA 1994 Service Repair Manual

Electrical
Special Tools
Troubleshooting
Tips and Precautions ................................ 23-3Five-stop Tloubleshooting ..............,...-..-... Z3-sSchematic Symbols ................................_. 23-6wire Color Cod€s ..................................... 23-6Relay and Control Unit Locations
Engine Compartment .........,............ ... --. 23-7Dsshboard and Door ..,,......................... 23-gDashboard and Floor ............................. 23-t OOuaner Panel .....-.....23-12Connector ldentification and WireHarness Routing ........ 23-i 3
Index to Circuits and Systems
Airbag ............... ...-..-... 2g-26sAir Conditioning ....,.. Section 2lAltelnator ......_.............. 23-99Anti-lock Brake Systsm (ABS) Section 19Automatic Transmission Section 14Battery .............. .......... 23-66Chafging System ........... 23-98rCigalstte Lighter .....................-...-......-..-.. Z3-2O4Cfock ................. ..........23-197rcruise Controf .......--..-... 23-242Distributor .................... 23-87Fan Controls ................. 23-1ogFuel and Emissions ... Section 1i*Fuses
Under-dash Fuse/Relay Box ................... 23-48Undor-hood ABS Fuse/Retay Box ............ 23-51Under-hood Fuse/Relay Box,.................. 23-52rGauges
Engine Coolant Temperature {ECT)Gauge ................ ..23-126Fuef cauge ............... 2g-123'Gauge Assembly ....--.23-113Speedometer .....-...,,. 23-114Tachometer .....,.....-.. 23-114Ground Distribution ........ 23-60Heater ,,,........,.... ..... Section 2lrHorn ................. ........... 23-199*fgnition Switch ............. 23-70fgnition Syst6m .......-..-.. 23-A7lgnition Timing .............. 23-89Indicator Lights"A/T Gear Position .............. ................... 23-1 32B1ak6 System ...,..,..-.23-127Engine Oil Pressura .............................. _ 23-1 51Low Fuel ............ ......23-125Malfunction Indicator Lamp {MlL} ...,,. Section I l
tfnteglated Control Unit ...29-144*lnterlock System ...................................... 23-1 3gLights, Exteriol
Back-up Lights ........... 23-179Brake Lights .............. 23-t8ltDaytime Running Lights {Csnada} ........... 23-156Front Palking Lights ............................. 23-1 65Flont Side Marker Lights ....................... 23-165Front Turn Signal Lights ........................ 23-1 65*Hazard Warning Lights .........................- 2g-1A4Headlights ................. 23-t6tLicense Plate Lights .............................. 23-1 69Taillights(Harchback) .......... 23-166
{Sedan) .............. .. 23-167Lights. Inteliol
Cargo Area Light {Hatchback) ...... -.. -.. -... 23-177Ceifing Light ........-..-.23-175
Dash Lights Blightness Controt .............. 23-t70Glove Box Lighr ................................... 23-1 69Spotfighr ............ ....-.23-174Trunk Light (Sedanl ............... .............. - 23.-177*Lighting Sysrem .......-.-... 23-152:Moonroof ,,.,.......,..,,,,,.-.23-211PGM-FI Systom ........ S€crion 11Power Distribution .,.-..--..23-54Power Door Locks .............,,..................... 23-233Power Mirors ..,..,....-...- 23-216Power Relays ...........,..... 23-68Power Windows ............ 29-222*Rear Window Defogger ........,... ..........,..... - 23-20,6Reminder Systems
Key-in Remindel System ....,.............,.... 23-1 50Lights-on Reminder System ................... 23-l 5f*Maintenance Reminder system ..,,.... -.. - -. 23-.1 2gSeat Belt Reminder System ..................- 23-125*Side Markel/Turn Signal/Hazard
Ffasher System .,..,..-.23.-1A4Spark Pfugs .........-...-..... 23-97Starting System ....,,.....-. 23-73*Stereo Sound System ...,.......................,,.. 23-l gg
Supplemental Restraint System {SRS} ......... 23-265Vehicfe Speed Sensor {VSS) .............--..-.... 23-122*Wiper/Washer Systom ...............--.........-..- Zg-254
rRead SRS pi€cautions on Page 23-271 betore workingin these areas.
-+

Power Distribution
L"I
.r"-
oiotG401
No.1l (100A)
UNOER-HOOD ABS FUSE/FEIAY 8OX
ABS 81 {2OA)
A86 82 II5AI
Gircuit ldentification
BATTERY
WHT/GRN f Bightr- blt) nas trom sotcooia
ABS oumo motor
8n /YEL - A8S contol unit
Btx/YEL < ib.l3 l7.5Al tu!.
YER/RED - A&S control unit
Stldar motorr BLKffEL
_o_:UNDER - HOOD FUSE/RELAY 8OX
No.43ll0Al
no.42 l20A)
wHT/GRt{ - Turn si0nrl/h.z.rd |thY
WHT/GRN
AL]ERNATOR I
tlomllom mLyKey intodock lohnokl {A/TlECMCruiso control unilTran.mksion control modub (TcMl
ABS contiol unh&6k lighl!
{To psge 23 - 55)
23-54
GRi{/REo - ECM

Electrical Switch Replacement
a All SRS €lectric8l wiring hamosses ar€ covorsd withyellow insulation,
a Befora disconnecting any pan of tho SRS wilo har-neas. connect the short connoctor(sl.a R6place the entire attect6d SFS harness assombly ifit has an opon circuit 01 damaged wiling.
NOTE: The original radio has a coded theft protection
circuit, Be sure to get the customer's code number before- disconnecting the battery.- removing the No. 32 (7.5 Al fuse from the under-hoodluse/relay box.- removang the radio.
After service, reconnect power to the radio and turn iton. When the word "CODE" is displayed, enter the cus-tomer's 5-digit code to restore radio ope.ation.
1. Disconnect the negative cable from the batery.
2. Remove the dashboard lower cover and knee bolster
{see page 23-70).
3. Disconnect the 5-P connector from the under-dashfuse/relay box and the 7-P connector from the mainwire harness (see page 23-70).
E
4. Remove the steering column covers.
Insert the key and turn it to ,,O',.
Remove the two bolts and replace the switch.
UPPER COVER
7. Install in the reve.se orde. of removat.
23-71

lgnition Switch
Steering Lock Replacement
CAUTION:
a All SRS electrical wiring harnesses ale covsred with
yellow insulation.
a Belore disconnecting any parl ot the SRS wir€ hal-
ness, connecl the short connector{s).
a Replace the entire alfected SRS harness a$6mbly il
it has an open circuit or damaged wiring.
NOTE: The original radio has a coded thett protection
circuit. Be sure to get the customer's code number betore
- disconnecting the batterY.
- removing the No. 32 (7.5 A) fuse from the under-hood
fuse/relay box.- removing the radio.
After service, reconnect power to the radio and turn it
on. When the word "CODE" is displayed, enter the cus-
tomer's 5-digit code to restore radio operation.
1. Disconnect the negative cable from the battery.
2. Remove the dashboald lower cover and knee bolster
(see page 23-7'l ).
3. Disconnect the 5-P connector from the under-dash
fuse/relay box and the 7-P connector trom the main
wire harness {see page 23-71).
4. Remove the steering column covers (see page
23-711.
5. Remove the column holder mounting bolts and nuts'
BOLT22 N.m
12.2 kgl'm.
NUT13 N.m(1.3 kgf.m, 9.4 lbl'ftl
23-72
16 tbt.ftl
6. Lower the steering column sssembly.
7. Center-Dunch each oJ the two shear bolts and drill
their heads off with a 5 mm {3/1 6 in) drill bit'
CAUTION: Do not dama96 tho switch body whon
r€movlng the shoar bol$.
Remove the shear bolts from the switch body.
Install the new ignition switch without the key in-
serted.
Loosely tighten the new shear bolts.
Insert the ignition key and check for proper opera-
tion of the steering wheel lock and that th€ ignition
key turns freely.
Tighten the shear bolts untilthe hex heads twist off.
8.
q
10.
11.
12.

5. Check lor 8n op€n in the BLKMHT wire circuit be-
tween the staner and ignition switch, and con-
nectors.
6. Check the ignition switch (see page 23-70).
7, On cars with automatic transmission, check the A/Tgear position switch (neutral position switchl and
connector. On cars with manualtransmission, check
the staner cut relay, clutch interlock switch, and
connectors.
NOTE: Check the No. 39 (5O A) fuse in the under-hood
fuse/relay box for the starter cut relay.
Check tor Woar and Damago:
The starter should crank the engine smoothly and stead-
ily. lf th€ startsr engages, but cranks the engine errati-
cally, remove it. Inspect the starter, drive gear, and
flywheel ring gesr for damage.
a Check the drive gear overunning clutch for binding
or slipping when the armature is rotated with the drivegear held. Replace the gesrs if damaged.
Check Cranking Voltago 8nd Current Draw:
Cranking voltage should be no less than 8.O volts.
Current draw should be no more than 360 amperes.
lf cranking voltag€ is too low, or current draw too high,
check for:
a Fully charged battery
a Open circuit in starter armature commutatot segments
a Starter armature dragging
a Shoned armature winding
a Excessive drag in engine
Chack Cranking rpm:
Engine spsod during cranking should be above 1O0 rpm.
lf spe6d is too low, ch€ck for:
a Loose battsry or starter teminals
a Excessively worn starter brushes
a Open circuit in commutator segments
a Dirty or damaged helical spline or drive gear
a Defective drive gear overrunning clutch
Chock StErtor Disongagomoni:
Press the clutch pedal allth€ way in (M/T), turn the ioni-
tion switch to "lll" and rolease to "11".
The starter drive gear should disengage from the tlywheel
ring gear. When you rolease the key.
lf the drive gear hangs up on th€ flywheel ring gear, check
for:
a Solenoid plunger and switch malfunction
a Dirty drive gear assembly or damaged overrunning
clutch
23-77

Control Unit Input Test
Oisconnect the 8-P connector from the interlock control
unit. Check for good contact between the connector and
socket terminals. lf the terminals 8re OK, make Iollow-
ing input tests at the connector. lf all input tests are OK,
but the problem remains, replace the cont.ol unit,
NOTE: lf the shilt lock solenoid clicks when the ignition
switch is ON and the brake pedal is pushed (shift tever
is in lfl position, accelerator is in rest position), the shiftlock system is electronically normal; test the A/T gear
positaon switch as described on page 23- 134.
Shift Lock Sy.tem:
No, Wlr6 Tost condition
Koy Intodock Systam:
No. WireT6st condition
Tost: Dosired resultPossiblo cause if rssuh is not obtainod
T6st: Desiled reaultPossible caure if rosult is not obtainsd
'I
lgnition switch ON (ll)
Brake pedal pushedCheck for voltage to ground:
There should be bsttery voltage
Blown No. 41 (15 A) fuse in the
under-hood fuse/relay box
Faulty transmission control module(TCM}
Faulty ECM
Faultv brake switch
Faulty throftle position lTP) sensor
An oDen in the wire
wn t/hEulgnition switch ON
brske pedal and
accelerator pushed
the same time
I [),
at
Check for voltage to ground:
There should be less than
battery voltage.
GRN^/vHT'
Shift lever in @Check lol continuity to ground:
There should be continuity.
Faulty A/T gear position switch
Poor ground {G201, G401}
An oDen in the wire
YEL/BLK
lgnition witch ON (lllCheck for voltage to ground:
There should be battery voltage
Blown No. 15 (10 A) luse in the
under-dash fuse/relay box
Faulty shift lock solenoid
An oDen in the wire
BLKUnder all conditionsCheck for continuity to ground:
There should be continuitv.
. Poor ground (G2O1, G4O1). An ooen in the wire
2
Shift lever in position
E
Check for continuity to ground;
Ther€ should be continuity.
Faulty A/T gear position swirch
Poor ground (c2O1 , G4O1)
An oDen in the wire
3WHTAYEL
lgnition switch tu.ned
to ACC (ll 8nd the keypushed in
Check for voltage to ground:
There should be battery voltage
Bfown No. 42 l2O Al fuse in the
under-hood tuse/relay box
Faulty steering lock assembly(kev interlock solonoid)
An oDen in the wire
4WHT/BLU
lgnition switch turned
to ACC (ll and the keypushed in
Check tor voltage to ground:
There should be batery voltage,
Bfown No. 42 l2O Al fuse in the
under-hood fuse/relav box
Faulty steering lock assembly(key interlock solenoid)
An oDen in the wire
23-141

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,

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