2002 HONDA CIVIC cooling

Fuel and Emissions Systems
System Descriptions (cont'd)
PGM-FI System
The Programmed Fuel Injection (PGM-Fl) system is a
sequential multiport fuel injection system.
Air Conditioning {A/C) Compressor Glutch Relay
When the ECfM receives a demand for cooling from the
Ay'C system, it delays the compressor from being
energized, and enriches the mixture to assure smooth
transition to the AVC mode.
Air Fuel Ratio lA/Fl Sensor
The Ay'F Sensor operates over a wide airlfuel range. The
Ay'F Sensor is installed upstream of the TWC, and sends
signals to the ECM which varies the duration of fuel
injection accordingly.
SENSORTERMINALS
HEATERTERMINALS
Barometric Pressure {BAROI Sensor
The BARO sensor is inside the ECM. lt convens
atmospheric pressure into a voltage signal that the ECM
uses to modify the basic duration of the fuel injection
discharge.
ztRcoNtaELEMENT
HEATER
11-26
\,
Camshaft Position (CMPI Sensor B (Top Dead Center(TDCI Sensor)
The CMP sensor B (TDC sensor) detects the position of
the No. 1 cylinder as a reference for sequential fuel
injection to each cylinder.
Crankshaft Position (CKPI Sensor
The CKP sensor detects crankshaft soeed and
determines ignition timing and timing for fuel injection
of each cylinder as well as detecting engine misfire.
Engine Coolant Temperature (ECT) Sensor
The ECT sensor is a temperature dependent resistor(thermistor). The resistance of the thermistor decreases
as the engine coolant temperature increases.
MAGNET
TERMINAL

DTC P0116: ECT Sensor Range/Performance
Problem
NOTE: lf DTC P0117 and/or P0118 are stored at the
same time as DTC P0116, troubleshoot those DTCS first,
then recheck for DTC P0116,
1. Stanthe engine. Hold the engine at 3,000 rpm with
no load {in neutral) until the radiator fan comes on,
then let it idle.
2. Check the ECT with the scan tool.
ls 176- 212'F (80 100"C)or0.5 0.8V
indicated?
YES Intermittent failure. system is OK at this time.
Check the thermostat and the cooling system.l
NO-Checkthe thermostat and the cooling system.
lf they are OK, replace the ECT sensor.l
11-57

PGM-FI System
aDTG Troubleshootang (cont'dl
DTC P0128: Cooling System Malfunction
NOTE; lf the DTCS listed below are stored at the same
time as DTC P0128. troubleshoot those DTCS first, thenrecheck for P0128.
P0107, P0108, P1128, P1129: N4anifold absolutepressure (MAP) sensor
P] I06, P1 107, P1 108: Barometric pressure (BARO)
sensor
P1259: VTEC system
P01 16, P01 17, P01 18: Engine coolant temperature (ECT)
sensor
P01 12, P01 13: Intake air temperature (lAT) sensor
P0500: Vehicle speed sensor {VSS)P0335, P0336: Crankshaft position (CKP) sensor
P0300: Random misfire
P0301, P0302, P0303, P0304: No. 1, No. 2, No.3 or No.4
cylinder misfire
P0505: ldle control system malfunction
P1519: ldle air control (lAC)valve
DTC P0128 can occasionally set when the hood is
opened while the engine is running.
1. Check the engine coolant level
Is the engine coolant level low?
VES Refill the engine coolant. lf necessary, repair
the coolant leakage.l
NO Go to step 2.
2. Turn the ignition switch ON (ll), and make sure the
A,/C is off.
11-64
\
3. Check the radiator fan.
Does the tadiator fan keep running?
YES Checkthe rad iato r fan circuit (see page 10-
14), the radiator fan switch circuit (Short) (see page
10-'16), and the radiator fan switch (see page 10-17).
Also, inspect the ECT and IAT circuits and terminal
connections. lf the circuits, the switch, and the
connections are OK, update the ECI\4 if it does not
have the latest software. or substitute a known-good ECM, then recheck (see page 1 1-6). lf the
symptom/indication goes away with a known-good
ECM, replace the original ECM.I
NO Replace the thermostat (see page 10-8).1

13. Installthe heater core and the evaporator core in
the reverse order of removal.
14. Installthe heater unit in the reverse order of
removal, and note these items:
. Do not interchange the inlet and outlet heater
hoses, and installthe hose clamps securely.. Refillthe cooling system with engine coolant (see
page 10-6).. Adjust the heater valve cable (see page 2'l-461.. Make sure that there is no coolant leakage.. Make sure that there is no air leakage.. Refer to evaporator core replacement {see step 6
on page 21-42).. Do the engine control module (ECl\4) idle learn
procedure (see page 11-139).. Enter the anti-theft code for the radio, then enter
the customer's radio station Dresets.
21-45

Service Manual Index
(cont'dl
Brake System Indicator CircuitCircuit DiagramConventional Brake Components..... 19-9TroubleshootingABS/TCS Components .... ....... ...... 19-55
Bulb, GeugeRep|acemenl................ .. ............2263
Bulb, HeadlightReplacement ......................................... 22-A1
Bumper, FrontRemoval/1nsra11ation ............................ 20 85
Bumper, RearRemoval/lnstallation... ... . .....20.86
Combination Light SwilchTesVReplacement ..............................22 80
Connecting Rod BearingsRep|acement...................... .......-....7-8
Connecting Rod Boltsf nspection ....................-.-.-.-.................... 7 -24
Connecting RodsInspection ........,,.,.,...,.,.,.,.,,,,.,,,.,.,.,.,.,.,.,.. 7 5
Connectors(See first page of this Index)
Conventional Brake Component3Component Location Index ................... 19'3Troub1eshootin9 ..................................... 19-4
Cylinder Head AssemblyComponent Location Index ..................... 6-3Inspection ................................................. 6 6Removal ..........&23Insta11alion .............................................. 6 39
Cylinder Head Cover8emova1 ..............-.-................................. 6-22Installation ..............................................6-41
Cylinder Head, BareInspecton..,.....,.
D
c
Cable ReelReplacement....................................... 23-1 19
CamshaftInspection .......................-...-................... 6-29
Cargo Area LightTesVRep1acement ................................ 22-97
CarpetReplacement.....-...-..... ... ......-.20-55
Ceiling Light-estrReplacement ................................ 22.96
Charging SystemComponent Location Index................... 4-20Circuit Diagram ...................................... 4-21
19-8
CoolantInspection .................. ..... .. 106Replacement................. ... . .. 10 6
Coolant Temperature Gat|geTroub1eshootin9................................... 22 64
Cooling SyslemComponent Location Index................... 10-2
Countershaft BearingsReplacement............... ..................... 13-42
Cowl CoverReplacement............... .. ..... ....20-95
CrankshaftRemoval .................................................. 7 -12
Repair ..................
Inspec(on,,,,,........1 14
Dampers. FrontReplacement................ ..................... 18 20
Oampers, RearRep1acement......................................... 18-34
Dash VentsBemoval/lnstallation .-.......................... 20-64
DashboardBemoval/1nsta11ation ............................ 20-66
Oashboard Center PanelRemoval/1nstaf 1ation ............................ 20 62
Dashboard Lower CoverRemoval/lnstallation ...................... 20-59, 63
Dashboard Under CoverRemoval/lnstallation ............................ 20 60
Diff erential Carrier Bearings, M/TRep1acement,,......,...,...,.,.,,,.,.,,,........,.,. 13-54
Ditferential Oil Seals, M/T8ep1acement......................................... 13-55
Differential Pinion Gears, M/TInspection .,....-,.,,,.,..,.-,.,.........,.,.,,, 13 53
OLC CircuitTroubleshooting ................................ 1 1-109
Door GlassRep1acement.,.,,,,,,,,,,,.,,,,,,,,,,.,.,.,.,.,,,,,,.,, 20-9Adjustment. .. .....................20-11
Door Glass WeathelstripsReplacement .............-.. . . . ..........-......20 10
Door LatchesReplacement ..........-.-.............................. 20-7
Door Lock ActuatorsTest ...................................................... 22-154
Door Lock Knob SwitchesTest -......... . . . - . . . . . . . . ......22-160
Door Lock SwitchesTest ........... ............................ ............. 22-160
Door Outer HandlesRep1acemen1 ........................................... 20-6
3
Child Seat Tether AnchorRemoval/lnstaf lat;on .. ........................ 23 11
CKP (Crankshaft Position) SonsorReplacement....................................... 1 1-116
ClutchComponentLocation 1ndex................... 12-3Rep1acemen1........................................... 12-9
Clutch InteYlock SwitchTest.....-........-...-............. ...---.-.......4-6
Clutch Master CylinderReplacement........................................... 12 5
clutch PedalAdjustment ............................................. 12 4
Clutch Pedal Position SwitchTest.,.,,,,,.,,,.,.,,,,,,.,.,,,,,,,,,.,,,,,.. ......445
lnstallation.................. . ..... .....1-24
Crankshalt Main BearingsReplacement........-.-.................................. 7-6
CrankshaftOil Seal,Transmission End1nstanation .............................................. 7 28
Crankshafl PulleyRemoval/lnstallation -..................-.......... 6-1 1
Cruise Control Actuator
Troubleshooting
Clutch Slave CylindorBeplacemeit...
...................... 4-43
.......4-22
Test
12-1
RepIacement........................................... 4-44
Cruise Control Actuator CableAdjustment ............................................. 4 45
Cruise Control Main SwitchTesVRep1acement .................................. 4 42
Cruise Control Set/Resume/Cancel SwitchTesVRep1acement .................................. 4 42
Cruise Control SystomComponent Localion Inde\................... 4-36Circuit Diagram ....-................................. 4 37
Cruise Control UnitInputTest.............................. .. ...4,40CMP {Camshaft Positionl Senso]Replacement....-...-.............................. 1 1-128
CMP (TDC) SensorsReplacement............-.......................... 1 1 1 14