2002 HONDA CIVIC brake

27. lnstallthe upper radiator hose {A) and heater hoses(B).
Push the engine control module (ECM) connectors
through the bulkhead, then installthe grommet (A).
29. Installthe harness clamps (B).
30. Connect the ECI\4 connectors (A) and main wire
harness connector (B).
Install the throttle cable (see page 11-164), then
adjustthe cable {see page 11-'163).
Installthe cruise control cable (see page 4-44), then
adjust the cable (see page 4-45),
Install the brake booster vacuum hose (A) and the
evaporative emission (EVAP) canister hose (B).
34. Installthe fuel line (see page 11-150).
31.
32.
33.
(cont'd)
5-13

Gylinder Head Removal
NOTE:. Use fender covers to avoid damaging painted
surfaces.
To avoid damage, unplug the wiring connectors
carefully whlle holding the connector portion.
To avoid damaging the cylinder head, wait until the
engine coolant temperature drops below 100'F (38"C)
betore loosening the cylinder head bolts.
Mark all wiring and hoses to avoid misconnection.
Also, be sure that they do not contact other wiring or
hoses, or interfere with other parts.
'1.
2.
3.
Drain the engine coolant (see page 10-6).
Remove the drive belt (see page 4-26).
Remove the intake manifold {see page 9-3).
Remove the air cleaner housing (see step 7 on page
5-2t.
5. Remove the water bypass hose (A).
Remove the exhaust manifold (see page 9-7
Remove the cam chain (see page 6-12).
6.
7.
).
8. Remove the engine wire harness connectors and
wire harness clamps from the cylinder head.
. Engine coolant temperature (ECT) sensor
conneclor. Camshaft position (Cl\4P) (top dead center (TDC))
sensor B connector. Camshaft posilion (CMP) sensor A connector
9. Remove the upper radiator hose (A) and heater
hose (B).
'10. Remove the harness holder (A)from the bracket,
then remove the connecting pipe mounting boh {B)
and brake booster vacuum line mounting bolts {C).
(cont'd)
1 1. Remove the water bvpass hose (D).
6-23

Cylinder Head
8.
Cylinder Head lnstallation (cont'd)
7.Apply engine oil to the bolt threads and under thebolt heads of all the cylinder head bolts.
Tighten the cylinder head bolts in sequence to 39N.m {4.0 kgf.m, 29 lbf.ft). Use a beam-type torquewrench. When using a preset-type torque wrench,be sure to tighten slowly and do not overtighten. lf
a bolt makes any noise while you are torquing it,
loosen the bolt and retighten it from the first step.
9.After torquing, tighten all cylinder head bolts in twosteps (90" per step). lf you are using a new cylinderhead bolt, tighten the bolt an extra 90..
FIRST STEP
SECOND STEP
6-40
v
{\
10. Installthe rocker arm assembly {see page 6-38).
1't .Install the water bypass hose (A).
---l.-.
B6x1.0mm'r2 N.m(1.2 kgl.m,8.7 lbf.ftl
12.
't3.
c6xl.0mm'12 N,m (1.2 kgt.m,8.7 lbf.ft)
Tighten the connecting pipe mounting bolt (B) andbrake booster vacuum line mounting bolts (C), theninstallthe harness holder (D) on the bracket.
Installthe upper radiator hose {A) and heater hose(B).

Removal:
'1. Remove the intake manifold cover.
2.Remove the evaporative emission (EVAP) canister
hose (A), brake booster vacuum hose (B), and
vacuum hoses {C).
3. Disconnectthe intake airtemperature (lAT) sensor
connector (A), and remove the breather hose (B),
then remove the air cleaner housing cover/intake
air duct assembly (C).
4.Fully open the throttle link and cruise control link
by hand, then remove the throttle cable (A) and
cruise control cable (B) from the links. Loosen the
locknuts {C). and remove the cables from the
bracket.
(cont'd)
(
9-3

lntake Manifold and Exhaust System
Intake Manifold Removal and Installation (cont'd)
9. lnstallthe air cleaner housing cover (A), and
connect the IAT sensor connector (B).
BC
Installthe breather hose (C).
lnstallthe EVAP canister hose (A), brake booster
vacuum hose (B), and vacuum hoses {C).
10.
11.
9-6
\
12. Installthe intake manifold cover.
6x1.0mm12 N.ml.1.2k91.m,8.7 tbf.ftl
Clean up any spilled engine coolant.
After installation, check that all tubes, hoses, and
connectors are installed correctly.
Inspect for fuel leaks. Turn the ignition switch ON
(ll) (do not operate the starter) so that the fuel pump
runs for about 2 seconds and pressurizes the fuel
line. Repeat this operation two or three times, then
check for fuel leakage at any point in the fuel line.
Refill the radiator with engine coolant, and bleed
air from the cooling system with the heater valve
open (see page 10-6).
to.
\-

Fuel and Emissions
Fuel and Emissions Systems
SpecialTools
General Troubleshooting
Information
DTC Troubleshooting lndex ....
Symptom Troubleshooting
1ndex...............
System Descriptions ................
Howto Set Readiness Codes ..
PGM-FlSystem
Component Location Index ....
DTC Troubleshooting ..............
MIL Circuit Troubleshooting ...
DLC Circuit Troubleshooting ..
Injector Replacement ...............
A,/F Sensor Replacement .........
Secondary HO2S
Replacement
ECT Sensor Reolacement .......
CMP Sensor B {TDC Sensor)
Replacement
IAT Sensor Replacement .........
Knock Sensor Replacement ....
CKP Sensor Reolacement .......
VTEC/VTC
Comoonent Location Index ....
DTC Troubleshooting ..............
VTC Oil Control Solenoid
Valve Removal/Test .............
CMP Sensor A Replacement ...
VTEC Solenoid Valve
Removal/lnsoection .............
ldle Control System
Component Location Index
DTC Troubleshooting ..............
A,/C Signal Circuit
TroubleshootinS ...................
Alternator FR Signal Circu it
TroubleshootinS ...................
EPS Signal Circuit
TroubleshootinS ...................
Brake Pedal Position Switch Signal
Circuit Troubleshooting .............
ldle Speed Inspection
ECM ldle learn Procedure .......
Fuel Supply System
Component Location Index
Fuel Pump Circuit Troubleshooting
1't-2
I I-J
11-7
1 1-10
11-12
11-46
11-49
11-52
11-97
11-109
11-111
11-113
11-113
11-114
11-114
11-115
11-115
11-116
11-117
1 1-1 18
11-127
11-128
11-128
11-129
1I-130
I t- t55
11-134
1 1- 135
1 1-137
1 1-138
1 1-139
1 1-140
11-141
11-144
Fuel PressureTest ................... 11-145
Fuel Lines Inspection ............... 11-146
Fuel Line/Ouick-Connect
Fittings Precautions ............. 1 1-148
Fuel Line/Ou ick-Con nect
Fittings Removal .................. 1 1-149
Fuel Line/Ou ick-Con nect
Fittings lnstallation ............... 11-150
Fuel Pressure Regu lator
Replacement ......................... 11-152
Fuel Fifter Replacement ........... 11-152
Fuel Pump/Fuel Gauge Sending
UnitReDlacement ................. 11-153
Fuel Pulsation Damoer
Rep1acement ......................... 11-154
Fuel Tank Reolacement ........... 11-155
Fuel GaugeSending UnitTest ....... 11-156
Low Fuel lndicatorTest ................. 1 1-158
Intake Air System
Comoonent Location Index .... 11-159
Throttle BodyTest ................... 11-160
Intake Air Bypass Control
Thermal Valve Test .............. 11-161
Air Cleaner Reolacement ........ 11-162
Air Cleaner Element
Reolacement ......................... 11-162
Throttle Cable Adjustment ...... 11-163
Th rottle Cable
Removal/lnstallation ............ 1 1-164
Th rottle Body Removal/
Installation .. 11-165
Th rottle Body Disassembly/
Reassemblv .......................... 11-166
Catalytic Converter System
DTC Troubleshooting .............. 1 1-167
PCV System
DTC Troubleshooting .............. 1 1-168
PCV Valve InsDection
and Test ...... 1 1- 169
PCV Valve Reolacement .......... 11-169
EVAP System
Component Location Index .... 11-170
DTCTroubleshooting .............. 11-171
EVAP Two Way Valve Test ...... 11-186
Fuel Tank Vaoor Control
Valve Test ... 11-187
EVAP Canister Replacement ... 11-189
Fuel Tank Vaoor Control
Valve Reolacement .............. 1 1-189Fuel Pressu re Relieving ...........

Fuel and Emissions Systems
Symptom Troubleshooting Index
When the vehicle has one of these symptoms, check the diagnostic trouble code (DTC) with the scan tool. lf there is no
DTC, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.
SvmotomDiaqnostic procedureAlso check lor
Engine will not sta rt
(MlL works OK, no DTCS set)
1. Test the battery {see page 22-50).
2. Test the starter (see page 4-8).
3. Troubleshoot the fuel pump circult (see page 11
141).
Low compressron
No ignition spark
lntake air leaks
Locked up engine
Broken timing chain
Contaminated fuel
Engine will not start (MlL
comes on and stays on, or
never comes on at all, no
DTCS set)
Troubleshoot the l\4lL circuit (see page 1 '1-97).
Engine will not start
(immobilizer indicator stays
on or flashs)
Troubleshoot the immobilizer system (see page 22-165).
Hard starting(MlL works OK, no DTCS set)
1. Testthe battery (see page 22-50).
2. Checkthe fuel pressure (see page 11-145).
Low compression
Intake air leaks
Contaminated fuel
Cold fast idle too low(MlL works OK. no DTCS set)
1. Do the ECM idle learn procedure (see page 11-139).
2. Checkthe idle sDeed (see paqe 11-138).
Cold fast idle too high
(MlL works OK, no DTCS set)
Do the ECI\4 idle learn procedure (see page 1 1- 139).
Checkthe idle speed {see page 11-138).
Inspect/adjust the throttle cable (see page 1 '1-'163).
Inspect and test the throttle body {see page 1 1-160}.
']
2.
3.
ldle speed fluctuates
(MlL works OK, no DTCS set)
1. Dothe ECM idle learn procedure (see page 11-'139).
2. Check the idle speed (see page 11-138).
3, Inspecvadjust th e throttle cable (see page 11''163).
4. Insoect and test the throttle bodv (see paqe 11- 160)
Intake air leaks
After warming up, idle speed
is below specifications with
no load
{MlL works OK, no DTCS set)
1. Do the ECIVI idle learn procedure (see page 1 1- 139).
2. Troubleshootthe alternator FR signal circuit (see
page 11-'134).
3. InsDect and test the throttle bodv {see paqe 1 1-160).
Vacuum hose clogged/
cracked/poor
connectron
After warming up, idle speed
is above specifications with
no toao(MlL works OK. no DTCS set)
1. Do the ECM idle learn procedure {see page 1'j-139).
2. Troubleshoot the alternator FR signal circuit(see
page 11-134).
Low power
(MlL works OK, no DTCS set)
1. Check the fuel pressure(seepagell-145).
2. Inspect and test the th roftle body (see page 11-160).
3. Inspecvadjust the throttle cable (see page 11-'163).
Low compressron
Camshaft timing
problem
Engine oil levelprootem
Engine stalls(MlL works OK. no DTCS set)
1. Do the ECM idle learn procedure (see page 1'l'139).
2. Check the fuel pressure{seepagell-145).
3. Check the idle speed (see page I 1-138).
4. Troubleshootthe brake pedal position switch signal
circuit (see paqe 11-137).
lntake air leaks
Faulty harness and
sensor connections
\
\-
11-10
\-

ECM Inputs and Outputs at Connector E (31P)
ltMoFPR
2$.c2s
i6SFIO2SHTC
1
IV RLY
IAFSHTCR
9tGl
14FTP15ELD
16EPSLD
t8202,4/BS21VSV
22BKSW23K LINE24SEFMJ26NEP
21lvoCD
29scs30WEN31MIL
Wire side of female terminals
NOTE: Standard battery voltage is 12 V.
TerminalWire colorTerminalnameDescriptionSignal
20BLU/RED2WBS (EVAPORATIVEEMISSION (EVAP)BYPASSSOLENOID VALVE)
Drives EVAP bypass With ignition switch ON (ll): baftery voltagesolenoid valve
21LT GRN/REDVSV (EVAPORATIVE
EI\4ISSION iEVAP)CANISTEB VENT SHUTVALVE)
Drives EVAP canister ventshut valveWith ignilion switch ON (ll): battery voltage
22WHT/BLKBKSW lBRAKE PEDALPOSITION SWITCH)Detects brake pedaloosition switch sionalWith brake pedal released: about 0 VWith hrake nedal nresse.l: batterv voltaoe23LT BLUK-LIN ESends and receives scanWith ignition switch ON (li)r pulses or battery
YELSEFMJCommunicates withmrltinleY eontrol unitWith ignition switch ON (ll): about 5 VWith enoine runnino under load: DUlses26BLUNEP (ENGINE SPEEDPULSE)Outputs engine speed pulseWith engine running: pulses
21RED/BLU \40CD fl\4MOBTLTZERCODE)Detects imrnobilizer signal
29BRNSCS (SERVICE CHECKSIGNAL)Oetects service check signalWith the service check signal shorted with the PGMTester: about 0 VWiih rhe service check sional ooened: about 5 V
30RED,A/VHTWEN (WRITE ENABLESIGNALiDetects write enable signal With ignition switch ON (ll): about 0 V
GRN/ORNMIL (MALFUNCTION
INDICATOR LAMP)Drives N4lLWith MIL turned ON: about 0 VWith MIL turned OFF: batterv voltaqe
(cont'd)
11-23