2000 HONDA CIVIC Vehicle Speed Sensor

Troubleshooting Flowchart - Vehicle Speed Sensor (VSS)
NOTE: Record all freeze data before you troubleshoot'
Po$rible Ctuse
. Disconnected vehicle speed
sensor (VSS) connectol. Short or open in VSS wire' Faulty VSS
@. Make sure lifts, iacks, and sal€tY stands are placed properly lsoe section 1)'
. Set the parking brake securelv, and block the rear wheels'
. iacr upile rront or the vehicle, and support it with safety st'nds'
TCM CONNECTORS
Wire side of female terminals
. OBD ll Scan Tool indicates Code
P1791.. Setf-diagno3is E indicato. light
blinks tour times.
Refer to seclion 23 for vehicle
soeed sensor IVSSI test
Check the VSS Voltage:
1. Raise the vehicle2. Shift the transmission to lEposrtlon.3. Disconnect the A (26P) and B(22P) connectors from the
TCM.4. Turn the ignition switch ON {ll).
5. Rotate the front wheel and
check for the voltage between
the 85 and 413 or A26 termi-
nals. Block the other wheel so
at does not turn
Check for oP€n in the wire
between the 85 terminal and the
vehicle speed sensor {VSS}. lf
wire is OK, check the vSS (see
soction 23).
Does0Vandapprox 5 V or more
appear alternatelY?
Check for loos€ TCM connedors
lI nec€ssary, substitute a known'
good TCM and recheck.
14-243

Road Test
NOTE: Warm up the engine to normal operating temperature (the radiator fan com6s on).
1. Apply the parking brake and block the wheels. Start the engine, then shift to the E position while depressing the
brake pedal. Depress the accelerator pedal and release it suddenly. The engine should not stall.
2. Test in E position
Park the vehicle in a slope (approx. 16'). apply the parking brake, and shift into E position. Release the brake; the
vehicle should not move.
3. Test-drive the vehicle on a flat road in the position shown in the table. Check that the engine speeds meet the approx-imate vehicle speeds shown in the table.
NOTE: Throttle position sensor voltage represents the throttle opening. To monitor the throttle position sensor volt-age, use one of the following methods:
A. Connect the Honda PGM Tester, and go to the PGM-FI Data List.
A1For road testing on '96 - 98 models, remove the drive/s side kick panel to expose the TCM; on '99 - OO models,remove the passenger's side kick panel to expose the PCM (see page l,[-236),
Set the digital multimeter to check throttle position sensor voltage between terminals:. '96 - 98 modols: TCM 84 {+} and Aa (-) or A17 (-1.. '99 - 0O models: FCM C27 {+l and 820 (-l ot 822 l-1.
DIGITAL MULTIMETER(Commerci.lly rvrilabl.lKS-AHM-32-003or oquivalant
BACKPROBE ADAPTER
BRN/BLK
A {26P1
TPS {BED/BLK}
'96 - 98 Models:
BRN/BLK
14-296
OBD ll SCAN TOOL orHONOA PGM TESTER
D{16Pt
Ware side ot female terminals
Wire side of female terminals

o @ position: Engino Speed rPm
Throttle Opening
Vehiclo Speed
-25 mph l/() km/h) | 37 mph {60 km/h) | 62 mph {100 km/h}
Throttle position sensor voltage: 0.75 V1,250 - 1,650
Throttle position sensor voltage: 2'25 V2,500 - 3,1002,650 - 3,2502,700 - 3,300
Throttle position sensor voltage; 4 5 V
Full throttle position3,950 - 4,5504,650 - 5,2505,200 - 5,800
o $l position: Engine Speed rPm
Throttle Oponing
Vehicle Spoed
2s mph (40 km/hl | 37 mph (60 km/hl | 62 mph {r00 km/h}
Throttle position sensor voltage: 0.75 V1,800 - 2,2002,200 - 2,8003,550 - 4,150
Throttle Dosition sensor voltage: 2.25 V2,950 - 3.5503,250 - 3,8504,050 - 4,650
Throftle position sensor voltage: 4.5 v
Full throftle position4,100 - 4,7005,100 - 5,7005,900 - 6,500
o E position: Engin€ Sp6ed rPm
Throttle Oponing
Vehiclo Spoed
25 mph (40 km/hl | 37mPh{60km/h) J 62 mph 1100 km/h}
Throttle Dosition sensor voltage: 0.75 V3,100 - 3,7003,650 - 4,2504,450 - 5,050
Throttle position sensor voltage; 2.25 V3,500 - 4,1004,050 - 4,6504,800 - 5,400
Throttle position sensor voltage: 4.5 V
Fullthrottle position4,100 - 4,7005,100 - 5.7005,900 - 6,500
14-297

Transmission
Removal
@. Mako suro lifts. iacks, and satety stands are placod
properly, and hoi3t bracket are attached to lhe cor-
rect position on the engine {see soction 1}.
. Apply parking brake and block r€ar wheels so tha
vehicle will not roll off stands and fall on you while
working undor it.
CAUTION: Use tender covers to avoid damaging painted
surfaces.
Disconnect the battery negative (-) terminal from
the battery, then remove the positive (+)terminal.
Remove the intake air duct and air cleaner housing
1.
assembly.
3. Remove the starter cables and cable holder from
the starter motor.
STARTER CABLE
STARTER MOTOR
14-304
4, Disconnect the solenoid harness connector, the drivepulley speed sensor connector, and the ground cable
terminals.
DRIVE PULI.-EYSPEED SENSORCONNECTOR
SOLENOIO HARNESSCONNECTOR
Remove the clip, then separate the shift cable from
the control lever,
CAUTION: Take care not to bend the shift cable.
WASHER
WASHER
GROUND CABLE
GROUND CAELE
CONTROL LEVER
S}IIFT CABLE

I
6. Disconnect the vehicle speed sensor (VSS) connec-
tor, the driven pulley speed sensor connector, and
the secondary gear shaft speed sensor connector.
SECONDARY GEARSHAFT SPEEDORIVEN PULLEY
SPEED SENSORCONNECTORSENSOR
7. Remove the transmission housing mounting bolts.
14-305
8. Remove the drain plug, and drain th€ CVT fluid
Reinstall the drain plug with a new sealing washer.
CAUTION: While installing the drain plug' bo 3ur.
nol io allow du3l 8nd other toreign particles to
enter into th€ trsnsmi$ion.
DRAIN PLUG18 x 1.5 rnm(, N.m (5.0 kgfm, 36 lbf'ft|
9. Remove the splash shield.
SEALING WASHERReplaco.

C O-RING Replace.
e) OIL SEAL RePlace.' FLYWHEEL HOUSING
O flVWneel }|OUSttttG GASKET Replace
6 DIFFERENTTALASSEMELY
@ lrr plsslce uruE ASSEMBLY
O O-RING Replace
@ DOWEL PIN
€) ATF PUMP ASSEMBLY(O DowEL PlN, 18 x 10 mm
O O-RING Replace.o DowEL PlN, 22 x 10 mm
lrr puup oRve cxltttt
iA SNAP RING
f3 fxaUst St|t|l, zz t 28 mm Selective part
Gt lrr punp ontve spaocxer
O PITOT FLANGE
ito nTF purrap ontve SPRoGKET HUB
(O THRUST WASHERS
@ PITOT PIPE BRACKET
O PITOT LUBRICATION PIPE
@ PITOT PIPEt3 OIL SEAL Replace.
Oa SEt AtitC, SO mm Selective Part
o3 lrr passlce ltnE HoLOER ASSEMBLY
6) o-RING Replace.
€) START CLUTCH ATF FEED PIPE
CO O-RING Replace.
€I FEEO PIPE FLANGE
@ SNAP RING
O' CONNECTOR BRACKET
@ BALL BEARING
6} SNAP RING64 COTTER RETAINER6D CoTTERS,25.5 mm selective Part6t stlnt cLutcH asseMsLv
@ secoruomv ontvE GEAR ASSEMBLY
@ o-RINGS Replace
6) DIFFERENTIAL COVER
rO ttaUSr SntU, zs t 35 mm Selective part
@ SECONDARY GEAR SHAFT
@ PARK PAWL SHAFT
@ PARK PAWL SPRING.1i PARK PAWL
@ TONGUED WASHER REPIACE,
@ PARK ROO HOLDER
@ BALL BEARING
@ o-RING Replace.
@ VEHICLE SPEED SENSOR
@ OIL SEAL Replace.
ft,
)
TOROUE SPECIFICATIONS
6x1.0mm
8 x 1.25 mm
8 x 1.25 mm
8 x 1.25 mm
12 N.m (1.2 kgnm,8.7 lbf'ft)
22 N.m (2.2 kgf'm. 16lbf'ft)
26 N.m (2.7 kgf'm, 20 lbf'ft)
29 N.m {3.0 kgf'm, 22 lbift)
14-311

Transmission
17.
Installation (cont'd)
Install I new set ring on the end of each driveshaft.
Install the right and left driveshafts (see section 16).
CAUTION: While instatling the drive3hafts in thedifferential, be sure not to allow dust and olher for-aign particles to enter into tho transmission.
NOTE:
. Clean the areas where the driveshafts contact thetransmission {differential} thoroughly with sol-vent or carburetor cleaner, and drv with com-
Dressed air.
. Turn the right and left steering knuckle fully out-wa.d, and slide each driveshaft into the differen-tial until you feel its set ring clip engage the sidegear.
Install the damper fork, then install the right and leftball joints to each lower arm with the castle outsand new cotter pins.
19.
10 x 1.25 mm43 N.m{4.4 kgf.m, 32 lbf.ftl
SELF-LOCKING NUTReplace.12 x 1.25 mm6l N.m
CASTI.I'12 x 1.25 mm
{6.s ksr.m. 47 tbr.ftr l! _ ll ffiteo
- s.o tet'.,
14-350
20. Install the splash shietd.
aa
I6I6*
"a,a s
21.
SECONOARY GEARSHAFT SPEEDSENSOB CONNECTOR
6 x 1.0 mm9.8 t{.m 11.0 kgt.m,7.2 tbf.trl
Connect the vehicle speed senso. connector. thedriven pulley speed sensor connector and the sec-ondary gear shaft speed sensor connector,
6x1,0mm12 N.m {1.2 kg{.m, 8.7 tbf,ft)
DRIVEN PULLEYSPEED SENSORCONNECTOR
E.
6 x 1.0 m.rl'12 N.m {1.2 kg{.m,8.7 tbf.fo

t-Operation
t
ABS Control Unit
Main Control
The ABS control unit detects the wheel speed based on the wheel sensor signal it received, then it calculates the vehicle
speed based on the detected wheel speed. The control unit detects the vehicle speed during deceleration based on the
rate of deceleration.
The ABS control unit calculates the slip rate of each wheel. and it transmits the control signal to the modulator unit
solenoid valve when the slip rate is high.
The pressure reduction control is a three-mode system, that is pressure reduction, pressure retaining and pressure intensi-
fying modes.
Self -diagnosis Funqtion
The ABS control unit is equipped with a main CPU and a sub CPU, and the CPUS check each other'
The CPUs check the circuit of the svstem.
When the CPUS detect failure, they shift to the "system down mode" or the "control inhibition mode"
The self-diagnosis can be classifield into these four categories:
O: Initial diagnosis
@: Except ABS control
@: During ABS control
@: During warning
On-board Diagnosis Funstion
The ABS control unit is connected to the data link connector {16P).
The ABS system can be diagnosed with the Honda PGM Tester.
(cont'd)
MODEABS INDICATOR LIGHTMAIN
RELAY
SOLENOID
VALVECPURestart conditionDTC
SYSTE IV
DOWNONNo
operation
Drive
inhibitionOperation*rlgnition
switchOFF + ONMemory
CONTROL
INHIBITIONONNo
operalron
Drive
inhibitionOperationAutomaticMemory
*1: Except CPU failure
/
19-47