1998 HONDA CIVIC countershaft

Description
Power Flow (cont'dl
3rd Gear (bl or bd positionl
1. Hydraulic pressure is applied to the 3rd clutch. Power from the mainshaft 3rd gear is transmitted to the countershaft3rd gear.
2. Power is transmitted to the final drive gear, which drives the tinal driven gear.
NOTE: Hydraulic pressure is also applied to the 1st clutch, but since the rotation speed of 3rd gear exceeds that of 1stgear, power from lst gear is cut off at the one-way clutch.
TOROUE CONVERTER
MAINSHAFT 3RD GEAR
MAINSHAFT
COUNTERSHAFT
3RD GEAB
3RD CLUTCH
14-10
DRIVEN GEAR

4th cear lE position)
1. Hydraulic pressure is applied to the 4th clutch, which rotates together with the mainshaft, causing the mainshaft 4th
gear to rotate.
2. Power is transmitted to the countershaft 4th gear' which drives the countershaft'
3. Power is transmitted to the final drive gear, which drives the final driven gear'
NOTE: Hvdraulic pressure is also applied to the lst clutch, but since the rotation speed of 4th gear exceeds that of 1st
gear, power from 1st gear is cut off at the one-way clutch
TOROUE
MAINSHAFT 4TH GEAR
COUNTERSHAFT
FINAL ORIVEN GEAR
14-11

Description
Power Flow (cont'd)
El Po3ition
1, Hydraulic pressure is switched by the manual valve to the servo valve, which moves the reverse shift fork to thereverse position. The reverse shift fork engages with the reverse selector, reverse selector hub, and the countershaftreverse gear.
Hydraulic pressure is also applied to the 4th clutch. Power is transmitt€d from the mainshaft reverse gear via thereverse idler gear to the countershaft reverse gear.
The rotation direction of the countershaft reverse gear is changed via the reverse idler gear,
Power is transmitted to the final drive gear, which drives the final driven gear.
TOROUE
MAINSHAFT
COU TERSHAFT
REVERSE SELECTORHUBREVERSE SETICTOR
REVERSE SHIFTFORK
REVERSE IDLER
14-12
FINAL ON|VEN GEAR

I
PCM CONNECTOR B {25P1 {cont'dl
Terminal NumberSignalDescriptionMeasuring Conditions/Terminal Vohage
811SHBShift control solenoid valve B
control
In 1st gear and 2nd gear in -q1, q11 position,
and in E] position: Battery voltage
In 3rd gear and 4th gear in lD.J, [Dr- position: 0 V
B't2SLUInterlock controlWhen ignition switch is ON (ll), brake pedal
deoressed and accelerator Dedal released: 0 V
813D4 INDD4 Indicator light controlWhen ignition switch is first turned ON (ll):
Battery voltage for two seconds
In E position: Baftery voltage
B't 4NMSGMainshaft speed sensor groundAlways: 0 V
E tcNMMainshaft speed sensor signal
input
Depending on engine speed: Pulsing signal
When engine is stopped: 0 V
816ATP RAy'T gear position switch Eposition signal input
InE position: 0V
In other than E position: Battery voltage
817ATP 2A/T gear position switch E posi-
tion signal input
InE position: 0V
In orher than E position: Battery voltage
818 to 821Not used
s22NCSGCountershatt speed sensor groundAlwaysr 0 V
B23NCCountershaft speed sensor signal
input
Depending on vehicle speed: Pulsing signal
When vehicle is stopped: 0 V
B24ATP D4Ay'T gear position switch lor posi-
tion signal input
InEposition:0V
In other than 6 position: 5 V
ATP NPA,/T gear position switch E and
N position signals input
InE and E positions: 0V
In otherthan E and N] positions: Battery voltage
PCM CONNECTOR C {31P)
Terminal NumberSignalDescriptionMeasuring Conditions/Terminal Voltage
Cl to C6- see section 11 -
c1Service check signalWith ignition switch ON (ll) and service check
connector oDen; 5 V
With ignition switch ON (ll) and service check
connector connected with sDecial tool: 0 V
C8 to Cg- see section 11 -
c10VBUBack-up power systemAlways battery voltage
C11 to C31- see section '11 -
PCM CONNECTOR D (16P}
Terminal NumberSignalDescriptionMeasuring Conditions/Terminal Voltage
Dl to D4- see section 11 -
D5STOP SWBrake switch signal inputBrake pedal depressed: Battery voltage
Brake pedal released: 0 V
D6 to D16- see section 1 l -
14-43

FCM CONNECTOR D {16P)
\o
14-47
Terminal NumberSignalDo3criptionMeasuring Conditions/Torminal Vohage
D1LCALock-up control solenoid valve A
control
When lock-up is ON: Battery voltage
With no lock-up: 0 V
SHBShift control solenoid valve B
control
In E position, in 1st and 2nd gear in E, E
position: Battery voltage
ln 3rd gear in E, E, in 4th gear in E posi-
tion;0 V
D3LCBLock-up control solenoid valve B
control
When full lock-up: Battery voltage
With half lock-up: Pulsing signal
D4Not used
D5VB SOLLock-up control solenoids, shift
control solenoids and linear
solenoid power supply electrode
with ignition switch oN (ll): Battery voltage
With ignition switch OFF: 0 V
D6ATP RAy'T gear position switch
E position input
tnEposition:0V
In other than E position: Approx. 10 V
SHAShift control solenoid valve A
control
In E] position, in 2nd and 3rd gear in p!, [Q]
position: Battery voltage
In 1st gear in E, @ position, in 4th gear in El
Dosition: 0 V
D8ATP D3A/T gear position switch
E position input
In E position:0V
In otherthan @ position: Approx. 10 V
D9ATP D4Ay'T gear position switch
E position switch
In El position: 0 V
In other than E position: Approx. 5 V
D10NCCountershaft speed sensor signal
input
Depending on vehicle speed: Pulsing signal
When vehicle is stooped: 0 V
D11NMMainshaft speed sensor signal
Inpur
Depending on engine speed: Pulsing signal
When engine is stopped: 0 V
D't2NMSGMainshaft speed sensor ground
D13ATP NPAy'T gear position switch E and
E position input
InE and E positions: 0V
In other than E and E positions: Approx. 10 V
D14AfP 2Ay'T gear position switch
E position input
tnEposition;0V
In other than E position: Approx. 10 V
D16NCSGCountershaft speed sensor
ground

Symptom-to-Component Ghart
Electrical System -'gG - 98 Models
*1: The DTC in the parentheses is the code E indicator light indicates when the Data Link connector is connected to theHonda PGM Tester.*2: Whenever the Honda PGM Tester or Scan Tool detects an automatic transmission control system DTC, p07OO will beset in the PGM-FI control svstem.
DTCIIE Indicaior
LightMILDotection ltemPage
P1753
fl)BlinksONLock-up control solenoid valve A14-56
P1758
\21BlinksONLock-up control solenoid valve B14-58
P1705
(51BlinksONAy'T gear position switch (short to groundl14-60
P1706
(6)OFFONA,/T gear position switch (open)14-62
P0753
l7lBlinksONShift control solenoid valve A14-64
P0758
{8)ElinksONShift control solenoid valve B14-66
POl20
(9)BlinksONCountershaft speed sensor14-68
P0715
{15)
'96 - 97
models:
OFF'98 model:
Blinks
ON
Mainshaft speed sensor
14-70
P1768
{16)BlinksONLinear solenoid't 4-72
P0740
(40)OFFONLock-up control system14-7 4
P0730
(41)OFFONShift control system14-75
P0700*,
(none)Automatic transmission control svstem in the pGM-Fl
control svstem
14-52

Symptom-to-Component Chart
Electrical System -'99 - 00 Models
*1: The DTc in the parentheses is the code E indicator tight indicates when the Data Link connector is connected to theHonda PGM Tester.*2: Whenever the Honda PGM Tester or scan Tool detects an automatic transmission control system DTc, p07oo will beset in the PGM-FI control svstem
DTC*IE Indicator
LightMILDotostion ltemPage
P1753
fi)BlinksONLock-up control solenoid valve A'14-80
P1758
t2lBlinksONLock-up control solenoid valve B14-82
P1705
{5}BlinksONAy'T gear position switch {short to ground)14-84
P1706
(6)OFFONy'VT gear position switch {open)14-81
P0753
\71BlinksONShift control solenoid valve A14-89
P0758
(8)BlinksONShift control solenoid valve B14-9r
P0720
(9)BlinksONCountershaft speed sensorr4-93
P0715
(15)B linksONMainshaft speed sensor14-95
P1768
(16)BlinksONLinear solenoid't 4-97
PO7 40(40)OFFONLock-up control system14-99
P0730
(41)OFFONShift control svstem14- 100
P0700*,
(none)OFFAutomatic transmission control system in the pGM_Fl
controt svstem
14-54

Electrical Troubleshooting ('gO - 98 Modelsl
Troubleshooting Flowchart - Countershaft Speed Sensor
Po$iblo Causa
' Loosg or laulty conncctionbotwocn tho PCM and c.i hrr-n1't!' Disconnoctad countorahottlpo€{ san3or oonnoctot. Short or opon in countorshaftspeed lonsor wire. F ulty counte.lhalt spe6d s6n-sol
COUNTERSHAFT SPEED SENSORCONNECTOR
lFI,]1-F=r
9l
L_l
Terminal side ol male terminals
PCM CONNECTOR B I25P}
1
l'
NOTE; Record allfreeze data before you troubleshoot.
. OBO ll Scln Tool indicat6 Codem7z).. S6lt-dirgnosis E indic.tollight blink! nin. tim6,
ls the countershaft spoed sensorinstalled properly?
Moa3ure CountoEhaft Sp€ed S6n-sor Reaktanc€ at tho Son3or Con-noctor1. Disconnect the 2P connectortrom the countershaft spgedsensor connector,2. Measure the resistance of thecountershaft sDeed sensor,
ls the resistance 400 - 600 0?
Chock Countersh.ft Spood Scr|3olfor a Shoft Circuit:1. Disconnect the B {25P) connector from the PCM.2. Check for continuity betweenthe body ground and the 823terminal and 822 terminalindividually.
Repai. .hort in th. wiroa b.t$re€ntho 823 lnd 822 torminals .ndlho counteBhaft lpocd aenro..
To page 14-69
4-68
Wire side of temale terminals