1998 ACURA INTEGRA brake light

ECM CONNECTOR D (16P}
Wire side of female terminals
ECM CONNECTOR D (16P1NOTE| Standard battery voltage is 12 V.
TerminalnumberWirecolorT6rminal nameDoscriptionSignal
1RED/BLKTPS (THROTTLE POSITIONSENSOR)Detects TP sensor s;gnal.With throttle fully open: about 4.5 VWith throttle fully closed: about 0.5 V
2REDAr'r'HTECT (ENGINE COOLANTTEMPERATUBE SENSOB}Detects ECT sensor signal.With ignition switch ON (ll)r about0.1 - 4.8 V (depending on engine coolanttemperalure)
3WHT//ELMAP {MANIFOLD AESOLUTEPBESSURE SENSOR)Detects MAP sensor signal.With ignition switch ON (ll)iabout 3 VAt idle: about 1.0 V {depending on enginespeeol
4YELA/VHTvccl{SENSOR VOLTAGE)Power source for MAP sensor,With ignition switch ON (ll): about 5 V
5GRNAVHTBKSW (BRAKE SWITCH)Detects brake switch signal.With brake pedal released: 0 VWith brake pedal depressed: batteryvoltage
6*!RED/BLUKS (KNOCK SENSOR}Detects KS signal.With engine running: pulses
lPHO2S (PRIMARY HEATEDOXYGEN GENSOR)Detects primary oxygen sensorsignal.With throttle fully opened, fully warmed upengine: above 0.6 VWith throttle quickly closed: below 0.4 V
8RED/VEL
IAT (INTAKE AIRTEMPERATURE SENSOR)Detects IAT sensor signal.With ignition switch ON {ll): about0.1 - 4.8 V (depending on intake airtemperature)
10YEL/BLUvcc2(SENSOB VOLTAGE)Provides sensor voltage,With ignition switch ON (ll): about 5 VWith ignition switch OFF: 0 V
1lGRN/8LUSG2 (SENSOR GROUND}Sensor ground.Less than 1.0 V at all times.
GFNA/VHT(SENSOR GROUND}Ground tor MAP sensor.Less than 1.0 V at all times.
OBN/BLUSHO2S GND (SECONDARY
HEATED OXYGEN SENSORGROUND)
Ground for secondary heatedoxygen sensor,Less than 1.0 V at alltimes.
148LU/REDSH02S (SECONDARY
HEATED OXYGEN SENSOR}Detects secondary oxygensensor srgnal.With throttle fully opened. fully warmed upengine: above 0,6 VWith throttle quickly closed: below 0.4 V
LT GRNPTANK (FUEL TANK PRESSURE SENSOR)Detects fueltank pressure sensor.With luel fill cap opened: about 2-5 V
GRN/RED
EL (ELOiDetects ELD signal.With parking lights turned on at idle: about2.5 -3.5 VWith low beam headlights turned on at idle:about 1.5 - 2.5 V*1:USA*2: 818C1 engine"3:A"/T*4: B18C'1, 818C5 engines
11-41

This signals the ECM when the brake pedal is depressed
Inspeclion ot Brake Switch Signal.
Are the brake lights on withoutdepressing the brake pedal?
lnspect the HoRN STOP (20 Aifuse in the under-hood fuse/ relaybox,Do the brake lights come on?
Repair shori in the wire b€-
tween the brake switch and
the HoRN STOP {20 Al fuse.Replace tha HORN STOP (20 AlIus€.
Repair open in the wire be-tween the brtke switch andtho HORN STOP {20 Al tuse.
Inspect the brake switch {seesection 23).Check tor an open in the wire
{BKSW line):1- Depress the brake pedal.
2. Measure voltage between ECMconnector terminals D5 and Agwith the brake pedal depressed.
Repair open io th6 wiae batweonthe EcM lDs) rnd the brakeswitch.
Brake switch signal is OK.
ldle ControlSystem
Brake SwitchSignal
L
L
A {32P}LGl{BRN/BLX}
D {16P)
Wrre side of female terminals
I

ldle Speed Setting
IDLEADJUSTINGSCREW
7.
6.Turn the ignition switch OFF.
Reconnect the 2P connectors to the IAC valve and
the EVAP purge control solenoid valve, then do the
ECM reset procedures.
Restart and idle the engine with no-load conditions
for one minute, then check the idle speed.
NOTE: (Canada) Pullthe parking brake lever up.
Start the engine, then check that the headlights are off.
ldle speed should be;
Bl88l €ngine:
Mfi750 i 50 rpm
A/T750150 rpm (in Park or neutral)
818C1 engine:750 i 50 rpm
818C5 engine: 800 i 50 rpm
NOTE: 81881, Bl8Cl engines - It the idle speed
increases to *1rpm, this means the EVAP system ispurging the canister. To stop the purging termporarily.
raise the engine speed above 1,000 rpm with the
accelerator pedal, then slowly release the pedal.
*1: 81881 engine
M/T: 820 i 50 rpm
Ay'T: 840 t 50 rpm
818Cl engine
850 I 50 rpm
(cont'd)
Inspection/Adiustmont
NOTE:
. When setting the idle speed, checkthe following items:- The MIL has not been reported on.- lgnition timing
Spark plugs- Air cleaner- PCV system
. (Canada) Pull the parking brake lever up. Start the
engine, then check that the headlights are off.
1. Start the engine. Hold the engine at 3,000 rpm with
no load (in Park or neutral) until the radiator fan
comes on, then let it idle,
Connect a tachometer.
Disconnect the 2P connectors from the ldle Air
Control (lAC) valve and the EVAP purge control
solenoid valve.
2.
5.
if the engine stalls, restan the engine with the accel
erator pedal slightly depressed. Stabilize the rpm at
1,000, then slowly release the pedal until the engine
idles.
Check idling in no-load conditions: headlights, blower
fan, rear defogger, radiator fan, and air conditioner
are not ope€tlng.
ldlo speed should be;
B188l engine:
Mlf480 :l 50 rpm
A/T480 i 50 rpm (in Park or neutral)
B18C1 engine: /t80 t 50 rpm
818C5 sngine:550 t 50 rpm
lf necessary, adjust the idle speed, by turning theidle adjusting screw.
After adjusting the idle speed, recheck the ignition
timing {see section 23). lf it is out of spec, go back
to steo 4.

t"iI
Emission Gontrol System
System Description
Three Way Catalytic Converter (TWCI
\
t
The emission control system includes a Three Way
Catalytic Converter (TWC), Positive Crankcase Ventilation
(PCV) system and Evaporative Emission (EVAP) Control
system. The emission control system is designed to meet
tederal and state emission standards.
InsDeciion
!@@ Do not smoke during this procedure. Keep
any open llame away from your work area.
1. Start the engine. Hold the engine at 3,000 rpm with
no load {in Park or neutral) until the radiator fan
comes on, then let it idle.
2. Connect a tachometer.
Check and adjust the idle speed, if necessary (see
page '11-11 ! ).
Warm up and calibrate the CO meter according to the
meter manufacturer's instructions.
Check idle CO with rhe headlights, heater blower,
rear window defogger, cooling fan, and air condition-
er off.
NOTE: {Canada) Pull the parking brake lever up.
Start the engine, then check that the headlights are
olf.
CO meter should indicste 0.17o maximum.
DescriDtion
The Three Way Catalytic Converter {TWC) is used to convert hydrocarbons (HC), carbon monoxide (CO), and oxides of
nitrogen (NOx) in the exhaust gas, to carbon dioxide (COr), dinitrogen {Nr) and water vapor.
Bl8Cl engine l818Bl, 818C5 engines is similar):
FRONT OFVEHICLE
PRIMAEYHEATEDOXYGEN SENSORIPRIMARY HO2S}
HOUSING
WAYCATALYSTS
SECONOARYHEATEDOXYGEN SENSOR{SECONDARYH02St
\

Transmission Assembly
Removal
r@i Make surs iacks and safety stands sro placod propor-
ly (3ee s€ction 1).
. Apply parking brake and block resr whaeb 30 vohicle
will not roll off stands and hll on You whil6 working
under it.
CAUTION: Use fender covers to svoid damaging
paintod surtacos.
1. Disconnect the negative (-) cable from the battery,
then the positive {+) cable.
2. Remove the intake 8ir duct and the air cleaner hous-
ing assembly,
AIR CLEANERHOUSINGASSEMBL
Disconnect the back-up light switch connector and
the transmission ground wire.
BACK.UP LIGHTSWITCH CONNECTOR
TRANSMISSIONTRANSMISSIO
GROUND WIRE HANGEB B
4. Remove tne lowei radiator hose"clamp from the
transmission hsnger B.
INTAKE AIR DUCT
13-4
\-
5. Remove the wire hsrness clamps.
VSS CONNECTOR
Disconnect the starter motor cables and the vehicle
speed sensor (VSS) connector.
Remove the clutch pipe bracket and the slave cylin-
der.
NOT€: Do not operate the clutch pedsl once the
slave cvlinder has been removed.
7.

TCM Terminal Voltage/Measuring Conditions
A l26Pl ConnectorB (22PlConnector
TCM Terminal Locations
256789'1011132351II10
11,/l/2024261214,/l/1120,/1,/
T6rminal NumberSignalDescriptionMeasuring Conditions/T€rminal Voltag€
A'INot used
A2
SHBShift control solenoid valve B
control
In 1st and 2nd gear in E anO E positions and
E position: Battery voltage
ln E position,3rd and 4th gear in E anO Epositions:0 V
SHAShift control solenoid valve A
control
In E, E positions,2nd and 3rd gear in E and
E positions: Batteryjloltage
In lst gear in !d and -qtl positons and 4th gear
in E oosition: 0V
A4Not used
A5NEEngine speed signal inputWhen engine is rotating: Pulsing signal
ATPlA,/T gear position switch
E position input
In L!-l position: 0 V
In other than I position: Battery voltage
A7ATP2Ay'T gear position switch
E position input
In 13 position:0 V
In other than E position: Battery voltage
A8ATP D3A,/T gear position switch
E position input
In E position:0V
In other than @ position: Battery voltage
A9ATP D4A,/T gear position switch
E position input
InEposition;0V
In other than El position: Battery voltage
410ATP PNA,/T gear position switch
E and E positions input
InEorEpositions:OV
In other than E or N position: Battery vottage
411ATP RA/T gear position switch
E position input
lnEposition: oV
ln other than E position: 8attery voltage
412tGlPower supply systemWith ignition switch ON (lll: Battery voltage
413LG1Ground
A14Not used
A15LCBLock-up control solenoid valve B
control
During hall and full lock-up and during deceler-
ation: Battery voltage
During no lock-up:0 V
A16LCALock-up control solenoid valve A
control
When lock-up is ON; Battery voltage
With no lock-up: 0 V
417D4 INDD4 Indicator light controlWhen ignition switch is first turned ON (ll):
Battery voltage for two seconds
In E position: Battery voltsge
A18Not used
A19Not used
420AT CHKUpshifvdownshift comparative
signal output
With ignition switch ON (ll): Pulsing signal
421Not used
422ILUInterlock controlWhen ignition switch is ON (ll), brake pedal
deoressed and accelerator oedal released:
Battery voltage
423VBUBack-up power systemAlways Battery voltage
I
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I
14-44
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14-55
Diagnostic
Trouble Code(DTC).
Ej
lndicator
Light
SymptomPossible CauseRefer to
Page
P1794
(131Blinks
. No specific symptom appears.. Short or open in LT GRN wire between
82 terminal and ECM. Faulty barometric pressure (BARO)
sensor
NOTE: BARO sensor is built into ECM.
't 4-7 4
P1786
(14)Blinks
. Transmission jerks hard when
shifting.
Short or open in FAS (YEL) wire
between 819 terminal and ECM
Faulty ECM
14-76
P0715
(15)Blinks
. Lock-up clutch does not engage,Disconnected mainshaft speed sensor
connector
Short or open in mainshaft speed sen-
sor wrre
Faulty mainshaft speed senso.
14-74
P0740
{ none,OFF. Lock-up clutch does not engage.Faulty lock-up control system14-80
P0730
I none,
. Fails to shift (between lst - 2nd,
2nd - 3rd, 1st - 4th. 3rd - 4th,
1st - 2nd - 3rd, 1st - 2nd - 4th,
1st - 3rd - 4th, or 2nd - 3rd - 4th
gears onry).. Fails to shift (stuck in 1st gears).
. Faulty shift control system
14-81
P0700
(none)
. Other automatic transmission problem (s)
Inspeclthe a utomatic transmission problem (s)accordingto the DTC (s)indicated with code m700.
(DTC)*: The DTCS in the parentheses are the codes the E indicator light indicates (blinks) when the service cnecK connec-tor is connected with the sDecialtool {SCS service connector).
NOTE: WhentheOBDll Scan Tool orHonda PGM Tester indicates the DTC(S) for the automatic transmission control sys-
tem, the scan tool or tester also indicates code P0700 simultaneously. Code P0700 means detection of some automatic
transmission problem on the PGM-Fl control system.
lf the self-diagnostic E indicator light does not blink. perform an inspection according to the table below.
NOTE:
. lf a custombr describes the symptom for code P1706 (6), P0725 (11) or P0715 (15), it will be necessary to recreate the
symptom by test-driving, then recheck the DTC,. Sometimes the E indicator light and the Malfunction Indicator Lamp (MlL) may come on simultaneously. lf so, check
the PGM-Fl system according to the DTC, then reset the memory by removing the BACK UP fuse in the under-dash
fuse/relay box for more than l0 seconds. Drive the vehicle for several minutes at a speed over 30 mph(50 km/h). then recheck the DTC.
. Disconnecting the BACK UP fuse also cancels the radio anti-theft code, preset stations and the clock setting. Get the
customer's code number, and make note of the radio presets before removing the fuse so you can reset them.
SymptomInspectionR€f. page
E indicator light does not come on for two seconds after ignition is
first turned on (ll).14-42
E indicator light is on constantly (not blinking) wheneverthe ignition is on {ll).14-84
Lock-up clutch does not have duty operation (ON - OFF).Check A,/C signal with Ay'C
on.14-85Lock-up clutch does not engage.
Shift lever cannot be moved from E position with the brake pedal
oeDresseo.Check brake switch signal.14-86

Electrica I Troubleshooti n g
Troubleshooting Flowchart - Brake Switch Signal
Symptom
Shift lovar clnnot bo moved Itom
E pGition with the brske pod.l
dsoressod.
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TCM CONNECTORS
WIRE SIDE OF FEMALE TERMINALS
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i
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Check Brako Light Oporation:Deoress the brake Dedal.
Repair taulty brako switch circuit{soo 3€qtion 231.Are the brake lights ON?
Mea.ur6 STOP sw voh.ge:1. Turn the ignition switch OFF.2. Disconnect the A (26P) and B(22P) connectors lrom theTCM.3. Moasure the voltage botweenthe 812 and A13 or 426 termi-nals with the brake podal
depressed.
R€plir opon in the wire Itstwoonth€ 8'l2 torminal and bi.ke svtidt.
. 8rak6 switch signal b OK.. check lor loose TcM connoc-to]s, lf nsce$ary, sub3tituts aknown-good TcM and rochock.. lnsooct tho brake swilch circuit(soo scction 231.
, 14-86
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