11-187 HONDA CR-V 1999 RD1-RD3 / 1.G Workshop Manual

Fuel and Emissions
Special Tools ...................... 11-2
Component Locations
lndex ...................... ....,.... 11-3
Svstem Description
Vacuum Connections ...........,....,.,................. 1 1-9
Electrical Connections ................................... 1 1-15
System Connectors .,.,,.,............................,.,. 1 1-36
Troubleshooting
Troubleshooting Procedures,.,..................... 11-60
Engine Control Module/Powertrain ConttolModule Terminal Arrangement .............., 11-67
Diagnostic Trouble Code Chart .................... 1 t-75
How to Read Flowcharts .......,.....,.,............... I 1-79
PGM-Fl System
System Description .................,.,.,,,............... 1 1-80
Troubleshooting Flowcharts
Engine Control Module/PowertrainControl Module ........11-52
Manifold Absolute Pressure Sensor ............. 11-90
Intake Air Temperature Sensor .................... 1 1-95
Engine Coolant Temperature Sensor .,..,.,.... 1 1-99
Throttle Position Sensor ...........,.....,.,.,..,...... I 1'103
Primary Heated Orygen Sensor (Sensor 1) ... 11-110
Secondary Heated Oxygen Sensor{Sensor 2l .................. 1 1-117
Heated Oxygen Sensor Heater ..................... 11-121
Fuef Supply System ......11-124
Random Misfire ,....,.,..... 11-126
Mistire Detected in One Cylinder .....-........... 11-128
Knock Sensor ................ 11-130
CKP/TDC/CYP Sensor .................................... 1 1-131
Vehicle Speed Sensor ...............................,.... 1 1-135
Barometric Pressure Sensor .....,...,...,.,,........ 1 1-137
Electrical Load Detector ...,.,.......................... 1 1-138
CKF Sensor ................,.,, '11-112
ECM/PCM lnternaf Circuit ............................. 11'117
HO2S Replacement .,.,.,. 11-148
ldle Control System
System Description ............ 11-149
Troubleshooting Flowcharts
ldle Control System ...... 11-150
fdle Air Control Valve ......................,............. 11-152
Air Conditioning Signal ................................. I 1-155
Alternator FR Signal ...................................... 1 1-159
Starter Switch Si9na1 .................................... t l-161
Power Steering Pressure Switch Signal ...... 11-162
Brake Switch Si9na1 ...................................... 11-166
Fast ldle Thermo Valve .,.,.............................,.,.,. 11-168
ldle speed setting .............. 11-169
Fuel Supply System
Fuel Lines ............................ 11-171
Fuef Tube/Ouick-Conneci Fittings ..................... 11 -175
System Description ............ 11-178
Fuel Pressurg ...................... 11-178
Fuel Iniectors ................,..... 11-179
Fuel Pressure Re9u1ator .............................,.,...., f 1-181
Fuef Fifter ....,.,.,.,,,,.,............11-142
Fuel Pump ........................... 11-183
Fuel Gauge .......................... 11-184
Fuel Gauge Sending Unit ................................... I 1-185
Low Fuel Indicator System ...........,.,..,............... 1 1-185
PGM-FI Main Relay ............. 11-187
Fue|Tank................ ............. 11-191
Intake Air System
System Description ............ 11-193
Air Cleanel ,.,.,..................... 11-194
Throttle Cable ..................... 11-194
Throttle Body........ .............. 11-196
Emission Control System
System D$cription ...,....,.,. 11-199
Tailpipe Emission ............... 11-199
Three Way Catalytic Converter ..................,.,...,, 11-199
Positive Crankcase Ventilation System .,.,,,,.,.., 11-2O1
Evaporative Emission Controls .........,.,.,............ 11-203
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Ch€ck tor rn opon in tha wiioa(lGP lino.):1. Disconnectthe fuel inj€ctor andIAC valve connectors.2. Turn the ignition switch ON {ll}.3. Measure voltage betweenbody ground and ECM/PCMconn€ctor terminals B'l and89 individually.
- Repaii opon in th6 wirc{3lbetw.6n tho ECM/PCM (B1.
Bgl lnd tho PGM-FI mainroby.- Chock for poor connactionsor loo3€ wiJo3 at the PGM-FImain ralry.- T.st the PGM-FI mtin r.lay(soo p.ge 11-1871.
ls there battery voltage?
Chack for an opon in tho wire3
{PG, LG lino3l:1. Reconnect the luel iniectorand IAC valve connectors.2. Measure voltage betweenbody ground and ECM/PCMconnector terminals 82, 810,820 and 822 individually.
B.pair open in the wiroltlb.twocn tho ECM/PCM .ndG101 lloc.t6d rt th. thormoiathouingl that had mo.e than 1 .0 V.
lsthere lessthan 1.0 V?
Chock for a shon in the wira3
{VCCI, VCC2 lin..l:Measure voltage between bodyground and ECM/PCN4 connectorterminals C19 and C28 individuallv.Chock lor a short in r s€nsor:While measuring voltagebetwoen body ground and ECM/PCM connector terminals C19and C28 individually, disconneclthe 3P connector ol each sensorone at time:
. TP sensor. Fueltank pressure sensor
ls there approx.5 V?
Rooair ahort in tho wire b€twoentho MAP sen3or. TP sensor, Fuel
tank Dreaaure Sonsor and theECM/PCM tC19, C28).
ls there approx. 5 V?
Sub3lhuio . known-good ECM/PCM .nd rcch6ck. lf tymptom/indic.tion go.3 away, rapl.ceth. original ECM/PCM.Replece the ronsor thtt hadapprox. 5 V.
(From page 11-86)
lcont'd)
r
28
I1011't317
19202123
vXv) iiP2rELlBLK)
IGPl(YEL/BLK)
ECM/FCM CONNECTOR A {25PI
Wire side of lemale terminals
(YEL/RED)
Wire side oflemale terminals
ECM/PCM CONNECTOR C {3'IP}
| 2i37Es/'t61718 192021\22
26272elE30 31
vcc2(YEL/BLUIktvccl
11-47
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lFrom page 11 188)
Ch6ck lor an open in the wir€
{FLR line):1. Turn the ignition switch OFF.
2. Disconnect the PCM connec-
tor A (32P).
3. Check for continuity between
the PGM-FI main relay 7P con-
nector terminal No. 1 and PCM
connector terminal A16.
Repair open in the wire be{weonthe PCM lAl6l and the PGM-FImain relay.
Check for an open in the wir€s
{lGP1, lGP2lin€s):'1. Reconnect the PCM connectorA (32P).
2. Reconnect the PGM'Fl main
relay connector.3. Turn the ignition switch ON (lli.
4. Measure voltage between PCM
connector terminals A11 and
A10, and between A24 andA10.
- Repair open in the wir€ bet'
ween th€ PCM {A11, A2ia} end
the PGM-FI main relay.- Reolsce the PGM-FI main rolaY.
ls there battery voltage?
Check tor an open in the PCM:
1. Turn the ignition switch OFF.2, Measu re voltage betweenPCM connector terminals A16
and A10 when the ignition
switch is first turned ON {ll) for
Substitute a known-good PCM
and recheck. lf ptesctibed volttgeis now available, roplaco tho orig'in.lPCM.
ls there '1.0 V or less?
Check the PGM-Fl m.in.elaV(see page 11-187).
('97 model)
IGRN/YELI
-t
PGM.FI MAIN RELAY 7P CONNECTOR (C432I
FLR
Wire side of lemale terminals
IGP2(YEL/BLK)
(cont'd)
_l
1 1-1 89
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Fuel Supply System
PGM-FI Main Relay (cont'dl
('98 - 00 models)-l
(From page 11,188)
Check lor an open in the wire(FLR line):1. Turn the ignition switch OFF.2. Disconnect the ECM/PCM connector A (32P1.3. Check for continuity betweenthe PGM-FI main relay 7P con-nector terminal No. '1 and ECM/PCM connector terminal 416.
Repaia open in the wire betweenthe EcM/PcM lAl5l .nd thePGM-FI m.in relay.
Check for an open in the wiresllcPl,lGP2linos):1. Reconnect the ECM/PCN4 con-nector I (25P).2. Reconnect the PGM Fl mainretay connector.3. Turn the ignition switch ON l).4, Measure voltage betweenECM/PCM connector terminalsB1 and 82, and between 89and 82.
Ropai. open in tho wire b6t-we€n th. ECM/PCM lBt, Btl.nd the FGM-FI main rd.y.R€plac€ th6 FGM+| main retay,
Chock for an open in the ECM/PCM:1. Turn the ignition switch OFF.2, Measure voltage betweenECM/PCM connector terminals416 and 82 when the ignitionswitch is first turned ON (tl) for
Subrtitute e known-good ECM/PCM and recheck. lf prescribsdvoltage b now ovrihble, replacothe originel ECM/PCM.
ls there 1.0 V or less?
Check the PGM-FI main.elav(s6e page 11-1871.
PGM.FI MAIN RELAY 7P CONNECTOF (C€2)
Wire sid€ of female terminals
ECM/PCM CONNECTOR B I25PI
IGP2(YEL/BLKI
ECM/PCM CONNECTORS
a t32Pl
Wire side of female terminals
Wire side of f€male terminsls
1 1-190
Dde"Jt;;liL-F-T--
PGl(BLK}
38s l1011131719202122
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