Engine ACURA INTEGRA 1998 Service Repair Manual

Vehicle Speed Sensor (VSSI
Troubleshooting
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REO TEST HARNESS
PBOTECTIVETAPE
Test tho 8LK wiro:1. Disconnect the 3P connectorfrom the vohicle speed sensor(vss).
2. Connect the test harness(07LA,J - PT3020A) only to theengine wire harnoss.3, Connect the RED test harnessclip to the positive probe of anohmmel€r.4. Check for continuity betwoenthe RED test harness clip andbody ground.
Roplir op.n in th. BLK wirob.tw..n tha VSS .nd G101.
To3t thc BLK/YEL wiro:1. Conn6ct th€ WHT test harnessclip to the positive prob€ of avoltmeter, and connect the REDt€st harness clip to the nogativeprobe.2. Turn the ignition switch ON (lll.
R.p.lr op.n In tho BLK/YEL wirebrtw..n th. VSS and th. under-dr.h tu../r.l!y box.
Tort th. BLU/WHT wiro:Connect the GRN test harnessclip to the positive prob€ ot avoltmeter, and connect the REDtest harness clip to the nggatjveprobe.
Roprh op.n in th. 8LU/WHT wireb.tw.on tho VSS lnd PCM.ls there about 5 V or more?
Before testing, inspect the No. 15 (7,5 A) fuse in the under-dash fuse/relay box.
GRN TESTCLIP
TEST HARNESSOTLAJ - PT3O2OA
w'{T TES? HARIVESS CLIP
TAPE
23-128

1. Disconnect the 3P connector from the vehicle speed
sensor (VSSl.
2. Remove the two mounting bolts, then remove the
VSS.
3P CONNECTOR
BOLT9.8 N.m(1.O kgf.m,22 tbt,ltl
DRIVE LINK
3.Install in the reverse order of removal.
NOTE: The VSS drive link is a very small part;
careful not to lose it.
DC
Vehicle Speed Sensor (VSS)
Engine Oil Pressure
lndicator System
ReplacementEngine Oil Pressure Switch Test
23-130
E-_
1 . Remove the YEL/RED wire trom the engine oil pres-
sure swlrcn.
ENGINE OIL PBESSURE SWITCH
Check for continuity between the positive terminal
and the engine (ground) with the ignition switch OFF.
a lf there is continuity, go to step 3.
a lf there is no continuity, replace the switch.
Check lor continuity again, this time with the engine
running.
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 engine
oil pressure (see section 8).
a lf engine oil pressure is OK, replace the switch.
a lf engine oil pressure is low, check the engine oil
pump (see section 8) and, iI necessary, replace it.
2.
3.
POSITIVE TERMINAL

Engine Coolant Temperature (ECT) Gauge
Gauge Test
NOTE: Refer to page 23-123 for the wiring description of
the engine coolant temperature (ECT) gauge circuit dia-
gram.
1. Check the No. 25 (7.5 A) fuse in the under-dash
fuse/relay box before testing.
2. Make sure the ignition switch is OFF, then discon-
nect the YEL/GRN wire trom the ECT gauge send-
ing unit and ground it with a jumper wire.
YEL/GRN WIRESENDING UNIT
Turn the ignition switch ON (ll).
Check that the pointer of the ECT gauge starts mov-
ing toward the "H" mark.
CAUTION: Turn the ignition switch OFF before the
pointer reaches "H" on the gauge dial. Failure to do
so may damage the gauge.
a lf the pointer of the gauge does not move at all,
check lor an open in the YEL or YEL/GRN wire.
lf the wires are OK, replace the ECT gauge.
a lf the ECT gauge works, test the ECT sending
unrt.
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 ol the coolant.
Run the engine and measure the change in resistance
with the engine at operating temperature (the radi-
ator fan comes on).
5. It the obtained readings are substantially different
from the sDecifications above, replace the ECT send-
Ing unrt.
POSITIVE TERMINAL
Temperature133oF (56oC)1850F (85.C)-
212.F (100'C)
Resistance {O)13746-30
23-134

Replacement
1. Remove the console. then disconnect the 14P con-
nector from the switch.
2. Remove the two console switch mounting nuts.
3.
1.
Position the switch slider to "Neutral" as shown
above.
Move the shitt lever to "Neutral", then slip the
switch into position.
Attach the switch with the two nuts.
Test the switch in the @ and I position of the shift
lever. The engine should start when the shift lever
is in position E anywhere in the range of free play.
Connect the l4P connector, clamp the harness and
install the console.
5.
)
-
A/T Gear Position SwitchA/T Gear Position Switch
Adjustment
1. Shitt to the @ position, and loosen the nuts.
2. Slide the switch in the direction of @ position
lwithin 2.0 mm (O.079 in.)l so that there is continuity
between the "A" and "L" terminals in the range oI
free play oI the shift lever.
3. Recheck for continuity between each of the ter-
manals.
NOTE:
a ll adjustment is not possible, check for damage
to the shift lever detent and/or the bracket. lf
there is no damage, replace the console switch.
a The engine should start when the shift lever is in
position S in the range of free play.
E position
)
LOCK PIN
'/ia
NUTS
23-145

Integrated Control Unit
Circuit Diagram
Description
An integrated control unit, located in lhe left kick panel, integrates the lunctions of the key-in/seat belt r€minder , side
marker light llasher, wiper/washer, lights-on reminder, rear window delogger timer, brake system light bulb check, and
engine oil pressure indicator flasher circuits.
NOTE: Different wires with the same color have been given a nu mber suflix to distinguish them (for example,
GRN/RED I and GRN/RED' are not the same).
REAR WINDOWDEFOGGERRELAYREAF WINDOWDEFOGGENIND CATORL GHT
f-7
IIBLU/YEL
WHT/ BLK
WHT/ REO
+WHT
WNDSHIELDWIPERiWASHER SWITCH
INT OFF/INT
f7 f7
tltlYEUBLU 8LU/GRN
BLUMHT
J
wtN0sHr€10WIPERMOTOR
UNDER.DASH FUSARETAY BOX
F rmecnlleo counoL ultr
YEUBLU
rYEUBLU
YEUREO YEUREO
tl
IYEURED
LOWENGINEOIIPRESSUREINOICATOBLIGHT
; WINDSHIELD' WIPERMASHERI swlTcH
tf7IVtlYEL
J
FEARwtN00wOEFOGGERSWITCH
WHTIBLU
J
VOTTAGEREGULATOR(ln allernatol)
BLK
G441
ENGINEolLPRESSUREswrTcH
UNDER-NOOO FUSE/RELAY BOX
1.6
:6
t;t-L
i
"'i'- 'i*-
|
I Il
I vi: WINDSHIELO II WASHEB I
L__ "oto: _ __l(*)
n
s
s
,]
23-152
(*) :Wilh combined washer-wiper operalion

Integrated Control Unit
lnput Test (cont'd)
YEL/BLU
View from wire side
'With combined washer-wiper operation
Engine Oil Pressure Indicator Flasher System:
Wire/
No. TerminalTest condition
Key-in/Seat Belt Reminder System:
No. WileTest condition
Testi Desired result
Test: Desired result
Possible cause if result is not obtainsd
Possible cause if fesult is not obtained
*BLK/GRN
1Engine runningCheck for voltage to ground:
There should be battery voltage.
. Faulty charging system. An open in the wire
2YEL/RED
lgnition switch OFFCheck for continuity to ground:
There should be continuity.
. Faulty engine oil pressure switch. An open in the wire
lgnition switch ON (ll)Check indicator light. It the light
does not come on, attach the
YEL/RED terminal to groundl
The light should come on as the
ignition switch is turned ON.
. Blown bulb. An open in the wire
Start the engine.Check tor voltage to ground:
There should be battery voltage
lnsufticient oil
lmproper lubrication
Faulty engine oil pressure switch
1GRN/BLUDriver's door openCheck for continuity to ground:
There should be continuity.
. Faulty driver's door switch. An open in the wire
2
LT GRN/
RED
Front passenger's door
swrlcn open
NOTE: Before testing,
remove No. 43 {7.5 A)
fuse from the under-
hood fuse/relay box.
Check for continuity to ground:
There should be continuity.
. Faulty front passenger's door switch'An open in the wire
3LT 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 (G2O1, G401 l
An open in the wire
4RED/BLU
lgnition switch ON (lll
and driver's seat belt
unbuckled
Check for voltage to ground:
There should be 1 V or less.
Faulty seat belt switch
Poor ground (G551l
An open in the wire
NOTE: Refer to page 23-133 for the seat belt switch test.

)
Engine Oil Pressure
Indicator System
Description
NOTE: Refer to page 23-152 for the circuit diagram ofthe engine oil pressure indicator flasher. and to page 23
156 for the input test of the flasher circuit.
The low engine oil pressure indicator light works in twoways. lt will flash continuously following a momentaryloss ol oil pressure, or it will go on and stay on wath a
complete loss of oil pressure.
When the engine first starts, before oil pressure rises
above 29.4 kPa (O.3 kgf/cmr, 4.3 psi), current flows
through the low engine oil pressure indicator light andthe oil pressure switch to ground. This tests the circuit.
With the engine running, voltage is applied to the Ilash-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 the
oil pressure switch closes momentarily (more than O.5
seconds). but then opens again, terminal "YEL/RED" will
sense ground through the switch- The integrated con-trol unit will then provide and remove ground tor the low
engine oil pressure indicator light through terminal"YEL/RED". The light will flash on and off untilthe igni
tion switch is turned to "OFF".
lf engine oil pressure talls below 29.4 kPa (O.3 kgf/cmr,
4.3 psi) and does not increase, the oil pressure switchwill stay closed. The low engine oil pressure indicator light
will go on and stay on.
NOTE: Refer to page 23-130 for the engine oil pressure
switch test.
I
23-159

Cruise Control
- Control Unit InputTest(cont'dl
IBLKUnder all conditionsCheck for continuity to ground:
There should be continuity.
. Poor ground (G20l, G401). An open in the wire
2BLK/YEL
lgnition switch ON {ll}Check for voltage to ground:
There should be battery voltage.
. Blown No. l4 (7.5 Alfuse in the
under-dash fuse/relay box. An open in the wire
3LT GRNlgnition switch ON (ll)
and main switch ON
Check for voltage to ground:
There should be battery voltage.
. Faulty main swjtch. An open in the wire
GRY
lgnition switch ON (ll),
main switch ON and
brake pedal pushed,
then released
Check for voltage to ground:
There should be O V with the
pedal pushed and battery
voltage with the pedal released.
. Faulty brake switch. An open in the wire
5GRN/WHT
Brake pedal pushed,
then released
Check for voltage to ground:
There should be battery voltage
with the pedal pushed, and 0 V
with the pedal released.
Blown No. 52 (20 A)fuse in the
under-hood fuse/relay box
Faulty brake switch
An open in the wire
6RED/BLU
lgnition switch ON (ll)Connect to ground: lndicator
light in the gauge assembly
comes on.
Blown bulb
Blown No. 25 (7.5 A)fuse in the
under-dash fuse/relay box
Faulty dimming circuit in the gauge
assembly
An open in the wire
7LT GRN/
BLK
RESUME button
pushed
Check tor voltage to ground:
There should be battery voltage.
Faulty SET/RESUME switch
Faulty cable reel
An open in the wire8LT GRN/
RED
SET button pushed
IPNK
MT/: Clutch pedal
released
A/Tr Shift lever in [2l,
[Dl]. o, [o'l
-
Check for continuity to ground:
There should be continuity.
NOTE: There should be no con-
tinuity when the clutch pedal is
depressed or when the shift
lever is in other positions.
Faulty or misadjusted clutch switch(M/T)
Faulty A/T gear position switch(A/T)
Poor ground (G201,G401)
An open in the wire
't0BLUStart the engine.Check lor voltage to ground:
There should be voltage.
. Faulty ignition system or ECM. An open in the wire
't1ORN
lgnition switch ON (ll)
and main switch ON;
raase the front of the
car, rotate one wheel
slowly.
Check for voltage between the
ORN @ and BLK O terminals:
There should be 0- about
5 V-O- about 5 V repeatedly.
. Faulty vehicle speed sensor {VSS). An open in the wire
BRN/WHTConnect battery power
to the BRN/WHT
terminal and ground to
the BRN/BLK terminal.
Check the sound of the actuator
motor: You should hear the mo-
tor running smoothly.
. Faulty actuator. An open in the wire
BRNi BLK
Connect battery power
to the BRN/RED
Iermrnal.
Check the operation of the mag-
netic clutch: Clutch should click
and output link should be locked.
Faulty actuator
An open in the wire
Poor ground (G30'l)
No. Wire Test conditionTest: Desiled result Possible cause il lesult is not obtained
' 4 I BRN/RED
{
{
23-258
-L

Cruise Gontrol
1.
Actuatol Assembly Test
Disconnect the 4P connector from the actuator.
Check that the output linkage moves smoothly.
Connect battery power to the D terminal and ground
to the A terminal.
ACTUATOR
Check tor a clicking sound from the magnetic clutch.
and that the output linkage is locked. lf the outputlinkage is not locked, replace the actuator assembly.
Check the operation of the actuator moror In eacn
output linkage position according to the table (you
should be able to hear the motor).
FULLY CLOS€D
2.
3.
3.
23-264
Actuator Cable Adjustment
Check that the actuator cable operates smoothly
without binding or sticking.
Start the engine, and warm it up to normal operat-
ing temperature (radiator fans come on twice).
Measure how far the output linkage moves from thefully closed position. Free play should be 11 t 1,5mm (0.43 t 0.06 in).
FREE PLAY:1M.5 mm (0.43 1 0.06 in)
FULLY CLOSED POSITTON
4. lf the free play is not within specs, loosen the lock-
nut, and turn the adjusting nut as required.
NOTE: It necessary, check the throttle cable (see
section 1 1), then recheck the output linkage lreeplay.
5. Retighten the locknut, and recheck the free play.
^ffi"
c17i l,io
Battery
polaritiesOutput linkage
position
ooFULLY
CLOSED
MIDDLE
POSITION
FULLY
OPEN
c
Terminal
B
Terminal
The
moror
runs.
The
molor
runs.
The
motor
stops.
B
Terminal
c
Terminal
The
motor
stops.
The
motor
runs.
The
motor
runs.
{

)
Erasing the DTC Memory
To erase the DTC(S) from the SRS unit, use a Honda
PGM tester (see the Honda PGM Tester SRS vehicle
System Supplement) or the following procedure.
1. Make sure the ignition switch is OFF.
2. Connect the SCS service connector to the MES con-
nector (2P). Do not use a jumper wlre.
MEMORY EMSESIGNAL {MESI CONNESTOR I2P)
[GRN, GBNI or IWHT, BLKI
Turn the ignition switch ON (ll).
The SBS indicator light comes on for about six sec-
onds and goes off. Remove the SCS service connec-
tor from the MES connector (2P) within four seconds
after the SRS indicator light went off.
The SRS indicator light comes on again. Reconnect
the scs service connector to the MES connector
(2P) within the four seconds after the SRS indicator
light comes on.
The SRS indicator light goes off. Remove the SCS
service connector from the MES connector (2P)
within four seconds.
The SRS indicator light indicates that the memory is
erased by blinking two times.
Turn the ignition switch OFF. and wait for ten sec-
onos.
Troubleshootin g Intermittent
Failures
lf the.e was a malfunction, but it doesn't recur, it will be
stored in the memory as an intermittent failure, and the
SRS indicator light comes on,
Atter chocking ths DTC, troubleshoot as follows:
1. Read the DTC (see "Reading the DTC").
2. Erase the DTC memory (see "Erasing the DTC
Memory").
3. With the shift l€ver in neutral, turn the ignition switch
ON (ll), and let the engine idle.
4. The SRS indicator light comes on for about six sec-
onds and then goes off.
I o"* 1--
ONllI
Shake the wire harness and the connector, take a test
drive (quick acceleration, quick braking, cornering),
and turn the steering wheel fully left and righi, and
hold I there for fve to ten s€conds lo 6nd tt|e caus€
of the intermnem farlure
It lhe problem .!curs, lha SRS nd'calor r'ghl will
$aY on.
,l soc or less
Problem recurs, Iight stays on
lf vou can't duplicate the intermittent failure, the sys-
tem is OK at this time.SRS indic.lollight
MESconnaclottarrninlll
CONNECTED
DISCONNECTED
23-289