1999 HONDA CIVIC Obd

Electrical Troubleshooting (,96 - 9g Models)
Troubleshooting Flowchart - A/T Gear position Switch (Openf
NOTE: Record all freeze data before you troubleshoot.
Pos.ribls Cause
. Disconnocted A/T gear positionswitch connector. Open in A/T gear position switch
. Faulty A/T gear position switch
TCM CONNECTOR A I26PI
Wire side of female terminals
. OBD ll Scan Toot indicat* CodeP1706,. Solf-diagnosis E indicator tightblinb six times.
Measule ATP R Volt.gei1. Turn the ignition switch ON l).2. Shifi to E position.3. Measure the voltage betweenthe A11 and 413 or ,426 termi-nals.
Repair open in tho wire betwoenlhe A11 terminal and the A/Tgoar po3ition switch.
Measure ATP NP Volt.gei1. Shifrto E orE position.2. Measure the voltage betlveenthe A10 and A13 or 426 terminals.
Repair open in the wiro betweenthe A10 terminal .nd tho A/Tgea. poshion swhch.
Measure ATP D Vohage:1. Shift to E position.2. Measure the voltage betweenthe Ag and A'13 or 426 termi-
Repair open in the wire lretweenthe A9 terminel and the A/T gearposition 3witch.
To page 14-Z4j
14-246

Electrical Troubleshooting ('96 - 9g Models)
Troubleshooting Flowchart - lgnition Coil
NOTE: Record all freeze data before you troubleshoot,
Po3rible Cause
. Dbconnected ignition coil con-nectol. Short o. op6n ignition coil wire' F.ulty ignition coil
Wire side ot female terminals
. OBD ll Scan Tool indicates CodePOl25.. Soll-diagnosis E indicarol lightindicates Code 11.
Measure NE Voltrge:1. Disconnect the A {26p) connector from the TCM.2. Start the engine.3. Measure the voltage betweenthe A5 and 413 or A26 termi-nals,
R6p.i. open or short in the wireb€lween the A5 te.minsl and thoignhion coil. It wir€ b OK, checkthe ignition coil test lsoc aoction23t.
ls there battery voltage?
Check for loose TCM connector.It nec$sery. substilute a known-good TCM and .echeck.

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 Modelsl
Troubleshooting Flowchart - Shift Control Linear Solenoid
Possible Cause
' Disconnected 3olenoid h.rn€isconnoctor. Short or open in 3hift controllinear solenoid wire. Faulty shift control linear sole-noidSOLENOID HARNESS8P CONNECTOR
Terminal stde of male terminals
Wire side of female terminals
8LU/YEL
NOTE: Record all freeze data before you troubleshoot.
. OBD ll Scan Toot indicates CodeP1870.. Selt-dirgnosis [d indic.tor tightindicatos Code 30.
Measure Shift Control Linoar Sole-noid Resistance at the SolenoidHarness Connector:1. Disconnect the 8p connectorfrom the solenoid harness connector.2, Measu re the resistancebetlveen the No. 3 and the No.7 terminals ofthe solenoid haFness connector.
ls the resistance 3.8 - 6.8 O?
Check Shift Controt Linear Sote-noid for a Short Circuit:1. Disconnect the A (26p) con,nector from the TCM.2. Check for continuity betweenbody ground and the A3 terminal and the A16 terminalindividually.
Repair shon in tho wire6 betweonthe A3 and A16 termin.ts lnd thobody ground.
Measure Shitt Control Line.rSolenoid Resistance:1. Connect the 8P connector tothe solenoid harness connec,tor.2, Meas u re the resistancebetween the 43 and A16 ter-
Repair loose terminal oa open inthe wires between the 43 andA16 terminal3 and the solenoidharness connector.
ls the resistance 3.8 6.8 O?
Chock for loose TCM connectorc.ll necessary, substitute a known-good TCM and recheck.
BLU/WHT
GRN/YEL
TCM CONNECTOR A I26PI
GRN/YEL
ll 12l:
IriGlx
1578910111213
172t)232526
14-250

Troub|eshootingF|owchart_PH-PLControJLinearSo|enoid
NOTE| Record all treeze data before you troubleshoot
Possible cause
' Disconnected solenoid harness
connectof. Short or oPen in PH_PL control
linear solenoid wire. Faulty PH-PL control linear sole_
noidSOLENOIO HARNESS8P CONNECTOR
GRN/WHT
Terminal side of male termlnals
Wire side ol female terminals
. OBD ll Scan Tool indicates Codo
P1873.. sef-diagnosis E indicalor light
indicat6 Code 31.
Measure PH-PL Control Linear
Solenoid Resistance at the Sole_
noid Hatness Connectot:1. Disconnect the 8P connector
from the solenoid harness con-
nector,2. Measure the resistance
between the No 2 and the No.
6 terminals ofthe solenoid har
ness connector'
ls the resistance 3.8 - 6.8 0?
Check PH-PL Control Lineer
Solenoid for a Short Circuit:
1. Disconnect the A 126P) con-
nector lrom the TCM
2. Check for continuity between
body ground and the A2 ter
minal and the A15 terminal
individually.
Repair short in th€ wires
between the A2 and A15 lermi_
nals and the body glound.
Measute PH-PL Control Linear
Solenoid Resi3tance:1. Connect the 8P connector to
the solenoid harness connec-
tor,2, Meas u re the reslslance
between the ,q2 and A15 ter_
Rep.il loose tetminal or oPen in
th6 wires betwccn the A2 and
A15 lerminals and the solenoid
harness conn€ctol.
lsthe resistance 3.8-6 8 O?
Check for loose TCM connactors
lf neceasery, Substitute a known-good TCM and rechock.
PNK/BLK
TCM CONNECTOR A (26P)
oPNK/BLK
I234578I10l11213
11't5161720/,,/232526
IGRN/wHr
o
*r}l
t'T,
E[
PNK/8LK
3a5I910111213
1620232526
GRN/WHT
14-251

Troubleshooting Flowchart - Inhibitor Solenoid
NOTE: Record all treeze data betore you troubleshoot
Po$ibls Cause
. Dbconnected solenoid hatness
connedor' Short or opon in inhibitor sole'
noid wire. Faultv inhibitor solenoid
SOLENOID HARNESS8P CONNECTOR
Terminal side of male terminals
. OBD ll Scan Tool indic.td Code
P1882.. Selt-di.gnGis E indicator lighl
indic.tos Code 33.
Mea3ure Inhibhor Solenoid Resid-
ance at the sol€noid Harness
Connector:1. Disconnect the 8P connector
from the solenoid harness
connector.2. Measure the reslstance
betlveen the No 5 terminal of
the solenoid harness connec-
tor and body ground.
ls the resistance 11.7 - 21 0 0?
Check Inhibitor Solenoid lor a
Short Circuii:1. Disconnect the B (22P) con-
nector from the TCM.
2. Check for continuity between
the B1 terminal and bodygro!no.
Repair rhort in the wire ltetwegn
the 81 dnd the bodY ground.
Mea$rr€ Inhibitor Solenoid ResBt'
anoe:1. Connect the 8P connector to
the solenoid harness connec_
IOr.2. Measure the resistance
between the Bl and bodyground.
Reoair loose terminal or open in
the wire betwean the 81 and the
solenoid hame3s connector'ls the resistance 11.7 - 21.0 O?
Ch6ck for loose TCM connectors.
ll necessary, substhule a known_good TCM and techeck.
Wire side of female terminals
14-253

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