1998 HONDA INTEGRA light

Lock-uD Control
From sensor input signals, the TCM determines whether to turn the lock-up ON or OFF and activates lock-up control
solenoid valve A and/or B accordingiy. The combination oI driving signals to lock up control solenoid valves A and B
is shown in the table below.
ShiIt Contlol
The TCM instantaneously determines which gear should be selected by various signals sent from sensors, and actuates
the shift control solenoid valves A and B control shifting. Also, a Grade Logic Control System has been adopted to control
shifting in @ position while the vehicle is ascending or descending a slope, or reducing speed.
w"'u"
Lock-up condition
-\B
Lock'up OFFOFFOFF
Lock-up, slightONOFF
Lock-up, halfONON
Lock up, fullONON
LOCK-Upduring decelerationONDuty operationOFF-ON
Shift control solenoid valve
t"dil"" d;------\
B
tc!t' tcll
{1st)OFFON
(2nd )ONON
(3rd)ONOFF
{4th)OFFOFF
e {2nd)ONON
tr (1st)ONOFF
tr (Reverse)ONOFF
I'
(cont'd)
14-19

In E position in 2nd, 3rd and 4th, and E position in 3rd, pressurized fluid is drained from rhe back of the torque con-
verter through a fluid passage, causing the lock-up piston to be held against the torque converter cover. As this takes
place, the mainshaft rotates at the same speed as the engine crankshatt. Together with hydraulic control, the TCM op-
timized the timing of the lock-up system. Under certain conditions, the lock-up clutch is applied during deceleration in
3rd and 4th gear.
The lock-up system controls the range of lock-up according to lock-up control solenoid valves A and B, and the throttle
valve B. When lock-up control solenoid valves A and B activate, modulator pressure changes. Lock-up control solenoid
valves A and B are mounted on the torque converter housing. and are controlled by the TCM.
LOCK,UP CONTROL
LOCT.UP SHIfT VALVE
AlF COOIER
tocK uP coNTno! valvE
Solenoid valve
L*r""r "o.Jtio" \B
Lock'up OFFOFFOFF
Lock-up, slightONOFF
Lock-up, halfONON
Lock-up, fullONON
LOCK-Updu.ing decelerationONDuty operationOFF - ON
IOCK UP TIMING B VATVE
(cont'd)
14-39

IPartial Lock-up
Lock-uo Control Solenoid Valve A: ONLock-uD Control Solenoid Valve B: OFF
The TCM switches solenoid valve A ON to release modulator Dressure in the left cavity of the lock-up shift valve.
Modulator pressure in the right cavity of the lock-up shift valve overcomes the spring force, 8nd the lock-up shift valve is
moved to the left side,
Modulator pressure is separated into the two passages:
Torque Converter Inner Pressure: enters into right side to engage lock-up clutch,
Torque Converter Back Pressure: enters into left side to disengage lock-up clutch.
Back prassure {F2) is regulated by the lock-up control valve whereas the position of the lock-up timing B valve is deter-
mined by the throttle B pressure, tension of the valve spring, and pressure regulated by the modulator. Also the position
of the lock-up control valve is determined by the back prossure of the lock-up control valve and torque converter pressure
regulated by the check valve. With lock-up control solenoid valve B kept OFF. modulator pressure is maintained in the left
end of the lock-up control valve; in other words, the lock-up control valve is moved slightly to the left side. This slight
movement of the lock-up control valve causes the back pressure to be lowered slightly, resulting in partial lock-up.
NOTE: When used, "|eft" or "right" indicates direction on the hydraulic circuit.
LOCK.UP GO TNOLSOLENOIO VAIVE A
TOCK-UP SHIFT VAIVELOCI( UP COI{TROL VAIVE
T
LOC(,UP IM TG g VALV€
MODULATOB PNESSUFE
14-41

Description
LOCX UP CONTFOLSOLENOIO VAI.VE A
Lock-up System (cont'd)
Deceleration Lock-up
Lock-up Control Solenoid Valve A: ON Lock-up Control Solenoid Valve B: Duty Operation (ON e) OFF)
The TCM switches solenoid valve B ON and OFF rapidly under certain conditions. The slight lock-up and half lock-up
regions are maintained so as to lock the torque converter properly.
NOTE: When used, "|eft" or "right" indicates direction on the hydraulic circuit.
tocK-uP col{TFoLSOTENOID VALV€ B
IOCK-UPCOITTROL VALVE
locK.uP trMrr{G B vAlv€
I 14-44I
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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
lI
I
14-44
\/

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

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