1998 ACURA INTEGRA Service Repair Manual

Terminal NumberSignalDescriptionMaasuring Conditlons/Tarminal Voliage
424ACCLAir conditioning (Ay'C) clutch relay
control
With A,/C comDressor ON: 0 V
With Ay'C compressor OFF: Battery voltage
A25tG1Power supply systemWith ignition switch ON (ll)r 12 V
426LG1Ground
B1Not used
82BAROS SBarometric pressure sensor signal
input
With ignition switch ON (ll) and depending on
barometric pressure: Approx. 3 V
B3ECTEngine coolant temperature sen-
sor signal input
With ignition switch ON (ll) and depending on
engine coolant tem perature: Approx. 0.1 - 4.8 V
B4TPSThrottle position sensor signal
input
With ignition switch ON (ll) 8nd throttle fully
open: 4.14 - 4.82 V
With ignition switch ON (ll) and throttle fully
closed: 0.44 - 0.56 V
B5VSSVehicle speed sensor signal inputWith ignition switch ON (ll) and front wheels
rotating; Pulsing signal
B6AFSBUpshifvdownshift comparative
signal output
With engine idling: 0 V
At uDshift or downshift: 5 V for an instant
B7AFSAUpshifvdownshift com parative
srgnal output
With engine idling: 0 V
At upshift or downshift: 5 V for an instant
B8NCSGCountershaft speed sensor signal
ground
Always: 0 V
B9NCCountershaft speed sensor signal
Input
Depending on vehicle speed: Pulsing signal
When vehicle is stopped:0 V
B10NMMainshaft speed sensor signal
input
Depending on vehicle speed: Pulsing signal
When vehicle is stoDoed: 0 V
811Not used
812STOP SWBrake switch signal inputWith ignition switch ON {ll) and b.ake pedal
depressed: Battery voltage
With ignition switch ON (lll and brake pedal
released:0 V
813Not used
814scsTiming adjustment
service check signal
With ignition switch ON (ll) and service check
connector oDen:5 V
With ignition switch ON (ll) and service check
connector connected with special tool: 0 V
815Not used
816Not used
817NMSGMainshaft speed sensor signalgroundAlways: 0 V
818Not used
819FASShift acknowledge inputWith engine idling: 5 V
At upshift or downshift: 0 V for an instant
820VBEF+5 V referenceWith ignition switch ON {lll: Approx. 5 V
82'lNot used
Not used
14-49

Troubleshooting Procedures
Checking the Diagnostic Trouble Code (DTC)
with an OBD ll Scan Tool or th€ Honda PGM Tester
When the TCM senses an abnormality in the input or output systems, the lD,] indicator light in the gauge assembly will
blink. When the 16p Data Link Connector (DLC) (located under the dash on the passenger side) is connected to the OBD ll
Scan Tool or Honda PGM Taster as shown, the scan tool or tester will indicate the Diagnostic Trouble Code (DTC) when
the ignition switch is turned ON {ll}.
When the !r indicator light has been reported on, connect the OBD ll Scan Tool confirming to SAE J1978 or Honda PGM
Tester to the DLC (16P) behind the ashtray. Turn the ignition switch ON (ll) and observe the DTC on the screen ofthe OBD
ll Scan Tool or Honda PGM Tester. After determining the DTC, refer to the electrical system Symptom-to-Component
Chart on pages 14-54 and 14-55.
NOTE: SeetheOBDll ScanTool orHonda PGM Tester user's manual for specific instructions.
OBD-IlSCAN TOOL orHONDA PGM TESTER
Some PGM-Fl problems will also make the lol indicator light come on. After repairing the PGM-Fl system. disconnect the
BACK Up fuse (7.5 A) in the under-hood fuse/relay box for more than 10 seconds to reset the TCM memory, then recheck.
NOTE: 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
uJ trr
ulu
ai
14-50L
DATA LINK CONNECTOR (16P)
I
il
lt
rJq

L./Checking th€ Diagnostic Trouble Codo (DTC)
with the Sowica Check Connector and Special Tool
When the TCM senses an abnormality in the input or output systems, the [D;l indicator light in the gauge assembly willblink.
When the Service Check Connector (located under the dash on the passenger side) is connected with the special tool asshown, the E1T indicator light will indicate (blink) the Diagnostic Troubte Code (DTC) when the ignition switch is turned ON{

}.
When the @ indicator light has been reported on, connect the Service Check Connector with the special toot.
GAUGE ASSEMEI.Y
Then turn ON (ll) the ignition switch and observe the E indicator light.Codes 1 through 9 are indicated by individual short blinks. Codes 1O and above are indicated by a series of long and shortblinks. One long blink equals 10 short blinks. Add the long and short blinks together to determine the code. After deter-mining the code, refer to the electrical system Symptom-to-Component Chart on pages 14-S4 and 55.
\-F;ii^r
) ,J
Se. OTCI
Soo DTC2
Long blinkShort blinb lfive timcsl
Soe DTCl5
Some PGM-FI problems will also make the E indicator light come on. After repairing the PGM-FI system, dasconnect theBACK UP fuse No. 47 (7.5 A) in the under-hood tuse/relay box for more than 1O seconds to reset the TCM memory, thenrecnecK.
NOTE; Disconnecting the BACK UP fuse also cancels the radio anti-theft code, preset stations and the clock setting(cont,d)
Short blink loncsl
\-/ \i,
14-51

Troubleshooting Procedures
(
{
(cont'd)
l.Removethetwoc|ipssecuringthekickpane|,thenremovethe|eftsidekickpane|onthedriver,sside.
2. Remove the TCM, and turn it over.
3. Inspect the circuit on the TCM according to the troubleshooting flowchan with the special tool and a digital multime-
ler as shown.
How to uss the Blckprobr Sat
Connect the backprobe adapters to the st8cking patch cords, and connect the cord to a multimeter. Using the wire
insulation as a guide for the contoured tip of the backprobe adapter, g€ntly slide the tip into the connector from the
wire until it comes in contact with the terminal end oJ the wire.
)
BACKPROBE SET
07sAz - 001000A(two required)
DIGITAL MULTIMETER
lcomm.rci.lly .v!ilablolKS-AHM-32-003,or oquivalont
ADAPTER
, 14-52

TCM Reset Procodure
1. Turn the ignition switch OFF.
2. Remove the No. 47 BACK UP fuse {7.8 A) from the under-hood fuse/relay box for lO seconds to reset the TCM.
NOTE:
. Disconnecting the No, 47 BACK UP fuse also cancels the radio anti-theft code, preset stations and clock setting, Get thecustomer's code number, and make note of the rsdio presets before removing the fuse so you can reset them.o The TCM memory cannot be cleared by using the OBD ll Scan Tool or Honda pGM Tester; be sure to remove the BACKUP fuse to reset the TCM.
BACK UP (7.5 A) FUSE
J
UNDER.HOOD
FUSE/RELAY BOX
. Final Procodurs
NOTE: This procedure must be done after any trou bleshooting.
1. Turn the ignition switch OFF.
2. Reset the TCM.
3. Disconnect the OBD ll Scan Tool or Honda PGM Tester from the Data Link Connector, or remove the sDecial tool fromthe Service Check Connector.
4. Turn the ignition switch ON (ll), and set the radio presets and clock setting.
14-53

Diagnostic
Trouble Code(Drc)*
,94
lndicator
Light
SymptomPossible CauseRefer to
Page
P1153(1)Blin ks
Lock-up clutch does not engage,
Lock-up clutch does not disen-
gage.
Disconnected lock-up control solenoid
valve A connector
Short or open in lock-uP control
solenoid valve A wire
Faulty lock-up control solenoid valve A
14-56
P1758
t2lBlinks
. Lock-up clutch does not engage.Disconnected lock-up control solenoid
valve B connector
Short or open in lock-uP control
solenoid valve B wire
Faulty lock-up control solenoid valve B
14-58
P1790(3)Blinks
. Lock-up clutch does not engage.Disconnected throttle position (TP)
sensor connector
Short or open in TP seflsor wire
Faulty TP sensor
14-60
P1191(4)Blinks
. Lock-up clutch does not engage.Disconnected vehicle speed sensor
{VSS} connector
Shon or open in VSS wire
Faulty VSS
14-61
P1705
(5)Blinks
. Fails to shift other than 2nd - 4th
gears.
. Lock-up clutch does not engage.
. Shod in AvT gear position switch wire
. Faulty A,/T gear position switch14-62
P1706(6)OFF
' Fails to shift other than 2nd -
3rd - 4th gears.
. Lock-up clutch does not engage.
Disconnected A/T gear position switch
connector
Open in A/f gear position switch wire
Faulty A/f gear position switch
14-64
P0753
(71Blinks
. Fails to shift (between 1st - 4th
or 2nd - 3rd gear only).. Fails to shift (stuck in 4th gear).
Disconnected shift control solenoid
valve A connector
Short or open in shift control solenoid
valve A wire
Faulty shift control solenoid valve A
14-66
P0758(8)Blinks
. Fails to shift (stuck in 1st or 4th
gears).
Disconnected shift control solenoid
valve B connector
Short or open in shift control solenoid
valve B wire
Faulty shift control solenoid valve B
14-68
P0120(9)Blin ks
Lock-up clutch does not engage.Disconnected countershaft speed sen-
sor connector
Short or open in countershaft speed
sensor wrre
Faulty countershaft speed sensor
1+10
P1192
00)Blinks
. Lock-up clutch does not engage,Disconnected engine coolant tempera-
ture (ECT) sensor connector
Short or open in ECT sensor wire
Faulty ECT sensor
14-72
P0725
{1 1)OFF
Lock-up clutch does not engage.Disconnected ignition coil connector
Short or open in ignition coil wire
Faulty ignition coil
14-73
Symptom-to-ComPonent Chart
Electrical System
(DTC)*: The DTCS in the parentheses are the codes the E indicator light indicates {blinks) when the service check connec-
tor is connected to the special tool (SCS service connector)
4-54

u.drrf,,
J
J
J
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

Electrical Troubleshooting
Troubleshooting Flowchart - Lock-up Control Solenoid Valve A
Po+tible Cauta
' Diaconnac'tad lock-up control
lolanoid valva A connac'toa. Shon or opan in lod(-up co|ltrol
3olonoid valva A wire. Faulty lock-up cont?ol lolanoid
TCM CONNECTORS
WIRE SIOE OF FEMAI."E TERMINALS
WIRE SIDE OF FEMA.E TEBMINAIS
L/
. OBD ll Scrn Tool indic|t.3 Cod.
P17!i:t.. Self-Dirgnoii! E indic.torlight blinkr onco.
M.Nur. VREF Voh.go:'t. Disconnect the A (26P) and B(22 P) conn€ctors lrom th€
TCM.2. Turn tho ignition switch ON (ll).
3. Nleasure tho voltage betwson
the 820 and A13 or A26 tormi-nals.
Raplir opan or 3hort in tha wi.a
b.twa.n th. B20 t.lmin!l .nd
th€ EcM.lsthere approx. 5 V?
Check tor a Short to Powa.i
Measure tho voltag€ botwoen the
A16 and A13 or A26 terminals.
Rap!fu ahorl to Pow.t in tha wlra
b!tw..n th. A16 t rmln.l rnd tho
lock-up c!filtol lolaooid valvo A.
Moaaurc Lock-uP Contlol Sole-
noid Vrlvo A Be3bianco:1. Ttrrn the ignition switch OFF.
2. Measure the rssistancebetween the A16 and A13 or
A26 terminals.
Chack tor loolc TCM conncctora.lf naca!3!ry, rub3tftuta a known'good rolcnold v.lva a$amblY ol
TCM .nd r.ch.ck.
ls the rosistanco 12 - 25 O?
To page 14-57
\
14-56