1994 HONDA INTEGRA Oil pressure

A/C System Service
Leak Test
Only use service equipment that is U.L.-listed and is cer-
tified to meet the requirements of SAE J2210 to remove
HFC-134a (R-134a) from the air conditioner system.
CAUTION: Exposura to air condition ratrigerant and
lubaicant vapor or mist can irritato oyes. nose and
throat. Avoid br€athing tho sir conditionsr reftigolant
and lubricant vapor or mist.
lf accidental svstem discharge occurs, ventilate work
area before resuming service.
R-134a service equipment or vehicle air conditioner sys-
tems should not be pressure tested or leak tested with
comoressed air.
@ some mixturos ot air and R'13'la have
b.6n shown to b€ combustible at glsvated pressur€s
and can result in firo or sxplo3ion causing iniury or
proporty damage. Ngvar uso compress€d tir to pro33ure
tost R-134a $rvics oquipmont or vohicl€ air Gonditionsr
systcms.
Additional health and satetY information may be ob-
tained from the refrigerant and lubricant manufactures'
1. Connect a R-134a retrigerant Recovery/Recycling/
Charging System to the car. as shown, following
the equipment manufacturer's instructions.
NOTE: Be sure to install the same amount of new
refrigerant oil back into the A/C system before
chargtng.
2. Open high pressure valve to charge the system to
about 98 kPa (1.0 kgf/cm', 14 psi), then close the
supply valve.
3. Check the system for leaks using a R-134a refriger-
ant leak detector with an accuracy of '!4 g {0.5 oz)
per year or better.
4. lf you find leaks that require the system to be
opened (to repair or replace houses, fittings, etc.),
recover the system according to the Recover
Procedure on page 22-22.
5. Aiter checking and repairing leaks, the system must
be evacuated (see System Evacuation gn page 22-
38).
Rocov.ry/R.cycling/Ch.tging Sy3tcm
LOW PRESSURESIDE
HIGHSIDE
22-40

Gonnector ldentification and Wire Harness Routing
Engine Wire Harness {B1881engine)
Connector 01
Terminal
Number of
CavitiesLocationConnects ioNotes
c10'l
c102
c103
c104
c 105
c106
c107
c108
c108
c109
c110
c111
c113
c114
c115
Lt to
c117
c118
c119
c't 20
c121
c122
c123
cl24
c125
c't26
c127
c128
c129
c130
10
14
6
1
1
2
2
8
2
3
t
1
2
2)
2
8
14
2
2
Right side of engine compartment
Right side of engine compartment
Right side of engine compartment
Right side ol engine compartment
Right side of engine compartment
Right side of engine
Right side ol engine
Transmission
Transmission
Middle of engine
lvliddle of engine
Right side ot engine
Right side of engine compartment
ldiddle rear of engine compartment
Middle of engine
Middle ol engine
Middle of engine
Middle of engine
Middle ot engine
Left side of engine
lvliddle of engine
Middle of engine
Middle of engine
Middle ot engine
Middle ol engine
Left side of engine compartment
Left side of engine compartment
Left side of engine compartment
Transmission
Transmission
Transmission
Main wire harness (C221)
Main wire harness {C222}
Main wire harness (C223)
Main wire harness {C220)
Starter solenoid
Engine coolant temperature {ECT)
sensor
Engine coolant temperature (ECT)
gauge sending unit
Back'up light switch
Lock-up control solenoid valve A and B
lgnition coil
Top dead center/Crankshaft
position/Cylinder position
(TDC/CKP/CYP) sensor
Engine coolant temperature (ECT)
switch
Vehicle speed sensor (VSS)
Heated oxygen sensor (HO2S)
MAP sensor
Throttle position (TP) sensor
ldle air control (lAC) valve
Evaporative emission (EVAPI purge
control solenoid valve
Engine oil pressure switch
Alternator
Intake air temperature {lAT} sensor
No. 'l fuel injector
No. 2 tuel injector
No. 3 fuel injector
No. 4 fuel injector
Junction connector
Engine compartment wire harness
(c304)
Engine compartmenl wire harness
(c305)
Shift control solenoid valve A and B
Countershait speed sensor
Mainshaft speed sensor
M/T
NT
NT
NT
T 101
r102
Lelt side oI engine
Right side of engine compartment
Alternator
Under-hood tuse/relay box
G 101Right side of engineEngine ground, via engine wire
harness
23-16

Gonnector ldentification and Wire Harness Routing
Engine Wire Harnoss (B18Cl enginol
Connoctor 01
Totminal
umbor ol
Cavitio8LocationConnecla tof{orc!
c 101
cl 02
c103
c104
c105
c106
c107
c108
c109
c110
c111
cl12
c113
c114
c115
c116
c117
c1r8
c119
c120
cl2'l
c122
c123
c124
c125
c't26
c'127
c 131
c132
c133
c134
2
J
4
3
'I
4
2
I
2
't4
1
4
10
14
,l
2
2
8
Right side of engine compartment
Right side of engine compartment
Right side ot engine comPanment
Right side of engine compartmsnt
Right side of engine compartment
Righr side ot engine
Right side of engine
Transmission
Middle ol engine
Middle oJ engine
Right side of engine
Right side ot engine comPartment
Middl€ reat of engine compartment
Middle of engine
Middle of engine
Middle ol engine
Middle o{ engine
Middle of engine
Lelt side ot engine
Middle of engine
Middle of engine
Middle ol engine
Middle ot engine
Middle of engine
Left side of engine companment
Lelt side ot engine compartment
Left side of engine compartment
Right side ot engine
Right sid€ of engine
Middle ot engine
Middle of engine
Main wire harness (C221)
Main wire harness (C222)
Main wire harness (C223)
Main wire harness (C22O)
Starter solenoid
Engine coolant temperature (ECT)
sensor
Engine coolant temperature {ECTI
gauge sending unit
Back-up light switch
lgnition coil
Top dead center/Crankshaft
position/Cylind€r Position(TDC/CKP/CYP) sensor
Engine coolant temperature {ECT)
switch
Vehicle speed sensor (VSS)
Hsated oxygen sensor {HO2S}
MAP sensor
Throttle position {TPl sensor
ldle air control (lAC) valve
Evaporative emission {EVAPI purge
control solenoid valve
Engine oil pressure switch
Alt€rnatot
Intake 8ir temperature (lAT) ssnsor
No. 1 fuel injector
No. 2 fuel iniector
No. 3 fuel injeclor
No. 4 fuel injector
Junction connector
Engine compartment ware harness
{c304)
Engine comPanment wire harness
(c305)
VTEC solenoid valve
VTEC oil pressure switch
Knock sensor (KS)
Intaka air bypass (lAB) control sole-
noid valve
T101
r102
Left side of engine
Right sid6 ot engine compartment
Alternator
Under-hood fuse/relay box
G 101Right side of engineEngine ground, via engine wire
harness
23-18

BulbLocations
HIGH BEAM INDICAL|GHT {r.4 Wl
RIGHT TURN SIGNAL INDICATOR LIGHT (I.4 W}
BBAKE SYSTEM LIGHT (1.4 W)
SEAT BELT REMINDER LIGHT I1.4 WI
OOOR-OPEN INDICATOR LIGHT {1.4 WI
iSRS INDICATOR LIGHT (1.4 W}
LOW FUEL INDICATOR LIGHT {3.4 WILIGHTS{3.4 W x 3}
ABS INDICATOR LIGHT (1.4 W}
TAILGAT€-OPEN INDICATOR I-IGHT {1.4 W): HarchbackTnUNK-OPEN INDICATOR LIGHT 11.4 W): Sodan
LEFT TURI{ SIGNAL INDICATOR LIGHT II.4 WI
CHARGING SYSTEM LIGHT II.4 WI
POSITIOII I]{DICATOR LIGHT (1.12 W x 7l
LOW EI{GII{E OIL PRESSURETOB LIGHT 11.4 WI
MALFUI{CTION INDICATOR LAMP(MrLl fi.4 wt
MAINTENANCE REMINOER LIGHT IT.4 WI
cRutsE LTGHT tl.4 Wl
*: On the SRS printed circuit board
23-115

Replacement
Disconnect the 3-P connector trom the vehicle speed
sensor {VSS).
Remove ihe two mounting bolts, then remove the
VSS.
InstSll in the revsrse order of removal.
NOTE: The VSS drive link is a very small paru
caretul not to lose it.
Engine Oil Pressure
Vehide Speed Sensor (VSSIIndicator System
Engine Oil Pressure Switch Test
1. Remove the YEL/RED wile from the engine oil pres-
sure switch.
ENGI'{E OIL PRESSURE SWITCH
Check tor continuitv between the positive torminal
and the engine {gtound) with the ignhion swhch OFF.
a lf there is continuity, go to step 3.
a lf there is no continuity, replace the switch.
Check for continuity again, this time with th€ engine
runnrng.
a lf there is continuity, go to step 4,
a lf there is no continuity, the switch is OK.
Make sure engine oil level is OK, then check engin€
oil pressure (s€e section 8).
a lf engine oil pressure is OK, replace the switch'
a lf engine oil pressure is low, check the sngine oil
pump (see section 8) and, if necessary, replac€ it.
POSITIVE TERMII{AL
23-122
nlmlliitl

Integrated Control Unit
Circuit Diagram
D.3c ptlon
An integrat€d control unit, located in the left kick panel, integratss the functions of tho keyin/seat beh r6mind€r, sido
markar light {lasher, wiper/washer, lights-on r6minder, rear window dsfogger timer, brak€ system light bulb check, and
enging oil pressure indicator flasher circuitE,
NOTE: Difforent wires with the same color have be6n given a numbor suffix to distinguish them (for Example,
GRN/RED1 and GRN/RED' are not the same).
WNOSHIELD WIPER/WASHER SWITCH
IMT OFFiINT
I
II
IIIIIIIIIIII
YEUEE
rl
t
P
UNOER - DASH FUS€/RETAY BOX
r NTEGRATED COI{TROI UNIT
t-0wErGrilE 0|lPRESSI'REINDICATORLIGI{T
WINDSHIELOWIPERAVASHERswtTcH
tr-/
IBLK/GRN BI
WINDSHIELOWIPERMOTOR{Asl
VOLTAGEREGULATOR{ln ahamator,
UNOER- HOOD FUSE/RELAY 8OX
I
r3
r8relit;rBt5I
23-144
lr ) : With combinod washef-wip€r oporation

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