1996 HONDA CIVIC o2 sensor

Symptom-to-Com ponent Chart
Electrical System -'99 - 00 Models
r: The DTc in parentheses is the code E indicator light indicates when the Data Link connector is connected to the HondaPGM Tester.
DTCTE Indicatot
LighrMILDetostion ltemPage
P1705
(5)ElinksONA,/T gear position switch (short to grouno,14-265
P1706
(6)OFFONA"/T gear position switch (open)14-26€
P1870
(30)BlinksONShift control linear solenoid14-271
P1873
(31)BlinksONPH-PL control linear solenoid14-213
P1879
t32lBlinksONStan clutch control linear solenoid
Inhibitor solenoid
14-215
P1882(33)BlinksON't 4-277
P1885
(34)BlinksONDrive pulley speed sensol't 4-279
P1886
(35)BlinksONDriven pulley speed sensor14-281
P1888
(36)BlinksONSecondary gear shaft speed sensor
Shift control system
14-283
P1890
\421BlinksON14-245
P1891
(43)BlinksONStart clutch control system14-286
14-240

Electrical Troubleshooting ('96 - 98 Modelsl
Troubleshooting Flowchart - Throttle position (Tpl Sensor
Possible Cause
. Disconnected throftle position(TPl 3ensor connoctol. Short or open in TP sensor wire. Fauhy TP sensol
TCM CONNECTORS
Wire s;de of female terminals
. OBO ll Scan Tool indic.tes CodeP1790.. Self-diagnosis E indicator lightblinks three times.
Check lor Anothar Code or MILBlinking:1. Turn the ignition switch ON 1 ).2. Check whether the OBD ll scantool indicates another code orthe Malfunction Indicator Lamp(MlL) blinks (see secrion 11).
Does the OBD ll scan tool indicateanothercode oristhe MIL blink-ing?
Repair the PGM-FI systom (3eesection 111.
Measure VREF Voltage:1. Turn the ignition switch OFF.2. Disconnect the A (26P) and B{22P} connectors lrom theTCM.3. Turn the ignition switch ON{fl).4. Measure the voltage bet\iveenthe 820 and A13 or 426 termi-nals,
Repair open or short in thc wireb,stween the Bao tcrminal rnd theECM.
ls lhere approx. 5 V?
Measure TPS Voltago:Measure the voltage between theB4 and A13 or 426 terminals.
Repail open in the wire tr€tweonthe Erl t6.minal ind the TP sen3o..ls there 0.4 - 0.6 V?
Check for loose TCM connectors.lf necessary, substitute a known-good TCM and r6check.
NOTE: Record all freeze data before you troubleshoot.
BLK
WHT/RED
A {26P1

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

Troubleshooting Flowchart - Manifold
NOTE: Record all freeze data before you troubleshoot
Absolute Pressure {MAPI Sensor
TCM CONNECTORS
Wire side of female terminals
PG.iblo Cau3€
. Dkconnoctod manilold .bsoluto
ore33urc IMAP) sensor connoc'
lor. Short or opcn in MAP s.nsor
MAP sen3or
. OBD ll Scan Tool indicates Code
P1793,. self-diagno3b E indicato. light
indicat€s Code 12.
Chock tor Another Cod€ or MIL
Blinking:1. Turn the ignition switch ON (ll).
2. Check whether the OBD ll scan
tool indicates another code or
the Mal{unction Indicator LamP(MlL) blinks (sse section 11).
Does the OBD llscan tool indicate
another code or isthe lVlL blink-
in9?
Measure VREF voltage:
1. Turn the ignition switch OFF.
2. Disconnect the A (26P) and B
(22P) connectors trom the
TCM.3. Turn the ignition switch ON (ll).
4, Measure the voltage between
the B2O and A13 or A26 termr
nals.
R€pair opon or 3hort in the wire
botwoan the 820 t€.minal and
the EcM.lsthere aPprox.5 V?
Msasure MAP IPB) volt.ge:
Measure the voltage betlveen the
82 and A13 or 426 terminals.
Repair opon ot shorl in the wiro
betwesn the 82 torminal end th€
MAP sensol.ls there approx. 3 V?
Check for loo3e TCM conn€stors.
lf nec*sarY, sub3titute a known'
good TCM and rechock.
WHT/RED
14-249

Electrical Troubleshooting {'96 - 9g Models)
Troubleshooting Flowchart - Drive pulley Speed Sensor
' OBD ll Scan Tool indicates CodeP1885.. Self-diagnosis E indicator tightindicates Code 34.
NOTE: Record all freeze data before you troubleshoot,
Check the drive pulley speed sen,sor installation.
ls the drive pulley speed sen-sor installed properly?
M6a3ure Drive Pulley Sp€ed S€n-sor Resistance ai the Seosor Con-nectot:1. Disconnect the 2P connectorfrom the drive pulley speedsensor connector.2. Measure the resistance of thedrive pulley speed sensor.
ls the resistance 350 - 600 O?
Check Orive Pulley Speed Sen-sor tor a Short Circuit:1. Disconnect the B (22P)connec-tortrom the TCM.2. Check for continuity betveenbody ground and the 810 ter-minal and 817 terminal individually.
Rspair shon in the wi.es botwoenthe Bl0 and 817 te.minals andthe driva pulloy 3peod 3eniol.
Measure Drive Pulley Sp€€d Sen-sor Re3istance:1. Connect the drive pulley speedsensor 2P connector.2, Meas u re the resistancebetween the 810 and 817 ter-mtnals.
Repair loos6 t.rmin.l or open inth. wiros botweon tho Bl0 and817 torminals and thg driva pul-ley sp€gd sensor.
ls the resistance 350 - 600 O?
Check tor looso TCM connoctor.ll necessary, substituto a known-good TCM and recheck.
Po$ible Cause
. Oisconn€cted drive pulley speedsensor connector. Shon or op€n in drive pulleyspged sonsor wire. Faulty drive pulley spoed s.n-sot
ORIVE PULLEY SPEEDSENSOR 2P CONNECTOR
lT_ T---_l

1 | 2 tlt|]--+i-rr
l9tl
L_t
side oI male terminals
TCM CONNECTOR 8 I22PI
REO/BLU
Terminal
Wire side of female terminals
REO/8LU
J(l
24568910v1213t41516171820
GRN
o
1215iliI;W1M
1213111516tdil)lil/l
GRN
14-254
b

Troubleshooting Flowchart - Driven Pulley Speed Sensor
NOTE: Record all freeze data before you troubleshoot'
Po3sible Cause
. Disconnected dtiven PulleYso6ed sensor connector. Short or open in driven PulleYapeed sen3or wire. Faulty driven PulloY sPeod 3en-
DRIVEN PULLEY SPEEOSENSOR 2P CONNECTOR
l-_r-|1 2l
:-
t9tt
L_.1
Terminal side of male
TCM CONNECTOR I l22p)
WHT
termrnals
. OBD ll Scan Tool indicates Code
P1886.. Sell-diagnosis E indicator light
indicates Code 35.
ls the driven Pulley speed sen-
sor installed proPerlY?
M€asure Driven Pulley SP€ed Sen_
sor Resbt nce at the Sensor Con-
neclof:1. Disconnect the 2P connector
from the driven PUlley speed
sensor connectol.2. Measure the resistance ot the
driven pulley speed sensor.
ls the resistance 350 600 0?
Check Driven Pulley Speed Sen-
sor {or a Short Circuit:1. Disconnect the B (22P) connec_
tor from the TCM.2. Check for continuity between
body ground and the BB ter
minal and 89 terminal individ'
Repair sho.t in the wiles between
lhe 88 and Bg lerminals tnd the
driven pulleY 3Peed 3€nsor.
Measure Driven Pulley SPeed S€n-
sor Reistance:1. Connect the driven PulleYspeed sensor 2P connector'
2. M easu re the resistance
between the 88 and Bg terml_
nals.
Repair loos€ terminal or oPen in
the wires between the Bg and Bg
torminals and the dtiven Pulley3D6eO S6n50a,
ls the resistance 350 - 600 O?
Check lor loose TCM connector.
lf necessary, substitute a known_good TCM and rechack.
^\, REO/BLUo
12a68910
12131a15'16'171820
Wire side oI female terminals
RED/BLU]
o
WHT
1216810
12131a1516171820
14-255

Electrical Troubleshooting ('96 - 98 Modelsl
Troubleshooting Flowchart - Secondary Gear Shaft Speed Sensor
Po$ible Cause
. Disconnected secondary gealshaft speod sen3or connectol. Short ol open in s€condary gearshaft spe€d sen3or wiro. Faulty secondary gear shattspeed s€nsor
SECONDARY GEAR SHAFT SPEEDSENSOR 2P CONNECIOR
llll;ll
T_T
l@
tl
LJ
side of male terminalsTerminal
TCM CONNECTOR B {22P}
Wire side of female termanals
14-256
NOTE: Record all freeze data before you troubleshoot.
. OBD ll Scan Tool indicates CodeP1888.. Selt-diagnosis Iq indicator lightindicates Code 36.
Check the secondary gear shaftspeed sensor installation.
ls the secondary gear shaft speedsensor installed properly?
Measure Secondary Gear SheftSpeod Sensor R8istance at theSensor Connector:1. Disconnect the 2P connectorfrom the secondary gear shaftspeed sensor connector.2. Measure the resistance ol thesecondary gear shalt speed
ls the resistance 350 - 600 0?
Check Counterchaft Speed Son-sor for a Short Circuit:1. Disconnect the B 122P) connectorfrom the TCM.2. Check for continuity betweenbody ground and the 815 terminal and 816 terminal individually.
Repair short in the wir€6 bctuveenth. 815 and 816 torminrls.ndthe s€condary ge.r shaft speodls there continuity?
Measu.e Secondary Gear ShattSpeed Sensor Resistance:1. Connect the secondary gearshaft speed sensor 2P connec-
2. Meas u re the resistancebetween the 815 and 816 te.mrnals.
Reprir loose terminal or opcn inthe wires between the 815 and8'16 terminals and the secondaryg€ar shaft sp€ed s€nsor,
ls the resistance 350 600 O?
Check lor loose TCM connector.lf n€cessary, substitute a known-good TCM and recheck.
I2156910
12131a1516171820
WHT/RED T - ORN/BLU
D (o.
1a5678I10
1213141515171820
WHT/REI
A
I
ORN/BLU
L

Troubleshooting Flowchart - Drive Pulley Speed Sensor
NOTE: Record allfreeze data before you troubleshoot'
Possible Cau3€
. Disconnected diive PulleYsoeed s6n3or connectol. Short or open in drive Pull.Ysooed sonsor wire. FaultY drive PulleY spo€d sen'
301
DRIVE PULEY SPEED
SENSOR @NNEfiOR
Terminal side of male terminals
PCM CONNECTOR D (16PI
NDR SG IGRNI
Wire side o{ Iemale terminals
(cont'd)
14-279
.OBD ll Scan Tool indicates
Code Pl885.. Selt-diagnosb E indicator light
indicatos Code 34
check the drive pulleY sPeed sen-
sor installation, and check it for
damage.
ls the drive PulleY speed sen-
sor installed properly, and not
damaged?
Rein3tall or roplace and techeck
Measuro Drive PulleY Speed Sen_
sor Ro3istanco at the Sonsol
Connector:1. Disconnect the 2P conneclor
from the drive Pulley speed
sensor,2. Measure drive Pulley speed
sensor resislance at the sen-
sor connecror.
ls the resistance 350 - 600 O?
Check Drivo PulleY SP6€d Sen3o.
lor . Short Circuit:1. Disconnect the D {16P) connec-
torlrom the PCM.
2. Check lor continuity between
body ground and the D11 ter
minal and D'l2 terminal indi
vidually.
Repai. short in the wiles
between the Dll lnd D12 termi-
nals and iho drive Pull.Y speed
To page 14-280