Page 4 HONDA CR-V 1998 RD1-RD3 / 1.G Workshop Manual

Emission Control System
System Description
The emission control system includes, a Three Way
Catalytic Converter {TWC), Positive Crankcase Ventilation
(PCV) svstem and Evaporative Emission (€VAP) Control
system. The emission control system is designed to meet
federal and state emission standards.
Tailpipe Emission
Inspsction
!@ Do not smoke during this procsdura. Keep
any open tlame away from your work area.
1. Start the engine. Hold the engine at 3,000 rpm with
no load (in Park or neutral) until the radiator fan
comes on, then let it idle,
Connect a tachometer.
Check and, if necessary, adjust the idle speed, (see
page 11-169, 170).
Warm up and calibrate the CO meter according to the
meter manufacturer's instructions.
Check idle CO with the headlights, heater blower, rear
window defogger, cooling fan, and air conditioner off.
(Canada) Pull the parking brake lever up. Start the
engine, then check that the headlights are off.
CO meter should indicate 0.1% maximum.
4.
Three Way Catalytic Converter (TWCI
DsscriDtion
Three Way Catalytic Convertsr lTwcl:
The Three wav Catalvtic Converter (TWC) is used to
convert hydrocarbons (HC), carbon monoxide (CO), and
oxides of nitrogen (NOx) in the exhaust gas to carbon
dioxide (COr), dinitrogen (Nr) and water vapor,
{cont'd)
1 1-199
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'97 model:
The scan tool indicates Diagnostic Trouble Code (DTC) P0441: Evaporative Emission (EVAP) control system
insufficient purge flow.
Description
By monitoring the purge line vacuum with the MAP sensor, the PCM can detect insufficient EVAP control system purge
flow.
Possiblo Cause
. EVAP Purge Control Solenoid Valve
. EVAP Purge Control Solenoid Valve Circuit
. EVAP Control Canister
. Vacuum Lines
. PCM
Troubleshooting Flowchart
EVAP PURGE CONTROL
SO1TNOID VALVE 2P
CoNNECTOR (C108)
(v)
YL
Wire side of female
termrnals
(cont'd)
11-205
Th€ MIL has b€en reooited on.DTC P0441 is .tored.
Problem verificationl1. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neut.al) untilthe radiator fan comes on.2. Do the PCM Reset Procedure.3. Connect the SCS service con-nector,4. Test drive under following con'ditions on the road.- without any electrical load- Transmission in @ or @position- Engine speed between1 ,2OO - 2,4OO rpfi.- Decelerate from 50 mph (80
km/h)to 15 mph (24 km/h)Intermittent trilure, sydern is OKat this time. Check for Door con-nections or loose wir€3 at C108
IEVAP purge control solonoidvalvol .nd at the PCM.
ls DTC P0441 indicated?
Check tor an open in the wire (lcl
linel:1. Turn the ignition switch OFF.2. Disconnect the EVAP purge
control solenoid valve 2P con-nector.3. Turn the ignition switch ON (ll).
4. Measure voltage between bodyground and the EVAP purge
control solenoid valve 2P con-nector terminal No. '1,
R€pafu open in thc wir6 b€tw€enthG EVAP purge control solenoidvalve and the No. 15 ALTEBNA-TOR SP SENSOR (7.5 A)fuse.
ls there batlery voltage?
(To page 11'206)
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Emission Control System
Evaporative Emission (EVAP) Controls (cont'dl
(From page 11-205)PCM CONNECTOR A (32PI
JUMPER wlRE
PCS IRED/YELI
Wire side of female terminais
PG1 (BLKI
Chsck th6 EVAP purgo controlsolonoid valve:'L Reconnect the EVAP purgecontrol solenoid valve 2P con-nector.2. Connect PCM connector terminals 415 and A10 with a
Chscl to. an op6n or 3hort in th€wiro (PCS lin6):Measure voltage between PCMconnector terminal A15 and bodygrouno,
Does the solenoid valve clickwhen the jumper is connected?
Chock for . .hort in tho wiJe IPCSline):1. Turn the ignition switch OFF.2. Disconnect the PCM connec-tor A (32P).
3. Disconnect the EVAP purge
control solenoid valve 2P con-nector,4. Check for continuity betweenbody ground and PCM con-nector terminal A15.
ls there battery voltage?
Rooair short in tho wir6 bctweenthe EVAP purge control 3olenoidvalvo and tho PCM (A151.
Ropair open in the wir6 betwoonthe EVAP pu]go control .olonoidv.lve end the PCM (A15).
Check the vacuum lin6:Check the vacuum lines of EVAPsystem tor misrouting, leakage,brsakago and clogging.
Are the vacuum lines OK?
(To pago 11'207)
11-206
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Chack iho EVAP purge controlsolenoid valve:1. Disconnect the vacuum hosetrom the EVAP controlcanister.2, Connect the vacuum pump tothe hose and apply vacuum,
Does it hold vacuum?
Chgck thg EVAP control csnbter:1. Reconnect the vacuum hose tothe EVAP control canister.2. Connect a vac!um gauge tothe purge air hose.3. Connect PCM connector terminals A15 and 410 with ajumper wire.4. Stan the engine.5. Check the vacuum.
Check the EVAP two way valve(see page 11'224).
Does the EVAP two way valvework properly?Rapbce the EVAP two wey valve.
Substitute a known-good PCMand rechock. It symptom/indica-tion gocs away, roplacg tho origi-nrl rcM.
(From page 11-206)
JUMPEF WIRE
<\
EVAP CONTNOLCANISTER
VACUUMPUMPIGAUGE,0-30 in.Hg4973X -
0il1 -
xxxxx
VACUUM/PRESSUREGAUGE0-4 in.Hg07JA2 - ml(x)o8
wire side of female terminals
{cont'd)
-20711
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'98 - 00 mod€ls:
The scan tool indicates Diagnostic Trouble Code (DTC) P0452: A low voltage problem in the Fuel Tank Pressure
sensof.
The fuel tank Dressure sensor converts fuel tank absolute pressure into electrical signals and inputs the ECM/PCM.
OUTPUTVOLTAGEtvl{.5
0,5-? KPA(-50 mmHg,-2 in.Hgl
+7 kPr
l5O mmHg,2 in.Hgl
PRESSURE
ECM/PCM CONNECTOR A (32P)
Wire side ot female terminals
FUEL TANKPRESSURE SENSOR3P CONNECTOR tc6a6l
voc2(YEL/BLUI
Wire side ol fsmale terminals
(cont'd)
11-209
Th. MIL has been reoorted on.DTC m452 is stored.
Check the vacuum lin6:Check the vacuum lines of the fueltank pressure sensor for misrouting, leakage, breakage and clog-ging.
Are the vacuum lines OK?
Problem veriticstion:1. Do the ECM/PCM ResetProcedure-2. Remove the luelfillcap.3. Turn the ignition switch ONfl r).4. Monitor the FTP Sensor volt'age with the Honda PGMTester, or measure voltagebetween body ground andECM/PCM terminalA29.Intermittent failuro, system is OKat this lima. Chack lor Door con-nections or loose wi.es at C580llocrted rt access panell, C646lluel tank Daessure sensor) andat the ECM/PCM.
ls lhere approx. 2.5 V?
Check lor an open in wir€ lVeC2line):1. Turn the ignition switch OFF.2. Reinstallthe fuel fill cap.3. Disconnect the fuel tank pres-
sure sensor 3P connector,4. Turn the ignition switch ON (ll).
5- Measure voltage between thefLrel tank pressure sensor 3Pconnector No. 1 terminal andNo.2 terminal.
Replir opon in the wire b€tw€enth6 tuel tank pressure lensot andthe ECM/PCM {A29).ls there approx. 5 V?
YES
(To page 11-210)
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Emission Control System
Evaporative Emission (EVAP) Controls (cont'dl
FUEL TANKPRESSUNE SENSOR3P CONNECTOR tc646l
Wire side of female terminals
(From page l1'209)
Check lor a short in the wireIPTANK Iine}:Measure voltage betlveen the fueltank pressure sensor 3P connectorNo. 3terminal and No. 2terminal.
ls there approx.5 V?
Check for a short in the wire(PTANK line):1. Turn the ignition switch OFF.2. Disco n nect the ECM/PCMconnector A {32P).3. Check for continuity betweenthe fuel tank pressure sensor3P connector No. 3 terminalsand body ground.
Repair short in the wira betwgonthe fuel trnk prossure s6nsor andtho ECM/PCM lA29).
Sub.tituto a known-good ECM/PCM and r€check. lf 3ymptom/indication goer !way. replaceth6 original ECM/PCM.
11-210
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'98 - 00 modals:
The scan tool indicates Diagnostic Trouble Code (DTC) P0453: A high voltage problem in the Fuel Tank Pressure
sensor.
ECM/PCM CONNECTOR A {32PI
Wire sido ot fema16 t€rminals
FUEL TANXPf,ESSUBE SENSOR3p CONNECTOR {C6,a6l
vcc2IYEL/BLUI
sG2IGRN/BLKI
sG2(GRN/BLK}
Wire side ot female terminals
PTANKILT GRNI
(cont'd)
11-211
PTANK ILT GRN)
123
Thc MIL has b6on ropottcd on.DTC mia53 is dorcd.
Ch6ck tho vacuum linos:Check the vacuum lines of the
fuel tank pressure sensor lor mis-
routing, leakage, breakage and
cloggrng.
Are the vacuum lines OK?
Problorn verif ication:1. Do the ECM/PCM ResetProcedute.2. Remove the fuel fill cap.
3. Turn the ignition switch ON
{[).4. Monitor the FTP Sensor volt-age with the Honda PGM
Tester, or measure voltagebetween body ground and
ECM,PCM terminal429.Intarmittent tailuro, sv3iom b OKat this timo. Chock for poor con-nection3 or loo$ wire3 at C580(locstod .t .cc$r p.nell, C6a6(fucl tank pros3ure son3orl and.t the ECM/FCM.
ls there approx. 2.5 V?
Check lor an open in tho wiro
lSG2lin6l:1. Turn the ignition switch OFF.
2. R6installthe Iuel fill cap.3. Disconnect the Iu6l tank pres_
sure sensor 3P connector,4. Turn the ignition switch ON (ll).
5. M€asure voltago between thetuel tank pressure sensor 3P
connector terminals No. '! andNo.2.
Replir op€n in th. wi.c b€{weentha fuel tank Dio'sute sansot andtho EC|,/PCM {Cl8}.ls there approx. 5 V?
Ch€ck for an opon in tho wiro(PTANK linel:Measure voltage between thefuel tank pressure sensor 3P con-nector No. 3 terminal and No. 2terminal.
ls there approx. 5 V?
\To page 11-212)
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Emission Control System
Check fo. an open in the wire(PTANK linel:Measure voltage between ECM/PCM connector terminals A29 andc18.
Ropair open in the wire betweonthe ECM/PCM {A291 and tho fuoltank pressule 3ensor.
ls there approx.5 V?
Substitute a known-good ECM/PCM and recheck. lf symptom/indication goes away, r€placetho originrl ECM/PCM.
Evaporative Emission (EVAP) Controls (cont'dl
(From page 11,211)
ECM/PCM CONNECTORS
SG2 (GRN/BLK}
Wire side of temale terminals
11-212
-
PTANK {LT GRNI
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'98 - 00 models:
The scan tool indicates Diagnostic Trouble code (DTC) P1456: Evaporative Emission (EVAP) control system leak
detected {fuel tank system).
Troubleshooting Flowchart
- The MIL has been reported on.- DTC P1456 is stored.
Check the fuel fill cap:Check the fuel fill cap (the caP
must be a gray OEM cap and be
tightened at least three "clicks" toproperly seal the system)-
ls the proper fuel fill cap installed
and properly tightened?Replace or tighton the cap.
Check the lueltill cap seal:
Check the fuel fill cap seal.
Replace the luelfiller pipe.ls the tuel filler pipe damaged?
Fuel till caD is OK. Do the luel
tank pressure Sensor test (see
page 11-2111. (EVAP Purge con-
trol solenoid valve t€sl (see Page11-2151.1r':'99 - 00 models
(cont'd)
11-213
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EVAP purge control 3ol€noidvalve test.{Tho continu.tion of DTC Plil56
trouble3hootin9.)
Check the EVAP purge control
solenoid valve:1. Disconnect the vacuum hosetrom the EVAP control canis-
ter, and connect a vacuumpump to the hose.2. Turn the ignition switch ON (ll).
3. Apply vacuum to the hose.
EVAP purge contlol solenoidv.lvo is OK. Do the EVAP bypai3
solenoid valve test (see Page 11-
2161
Does the valve hold vacuum?
Check tho EVAP purge control
solenoid valve:'t. Turn the ignition switch OFF.2. Disconnect the EVAP Purgecontrol solenoid valve 2P con-nector,3. Check for continuity between
the EVAP pu rge controlsolenoid valve 2P connectorterminal No.2 and bodYground,
Check for s short in the wire
{PCS linel:1. D iscon nect the ECM/PCMconnector A {32P).2. Check for continuity betweenthe EVAP purge controlsolenoid valve 2P connectorterminal No. 2 and bodyground.
neprir short in tho wite bot$reon
the ECM/FCM lAGl and thc EVAPpurge control 3olenoid valve.ls there continuity?
Substitut€ a known-good ECM/
PCM and recheck. lf symptom/indication goe3 away. repl.ce
thc originsl ECM/PCM.
VACUUMPUMP/GAUGE,0 - 30 in.HgA973X - 041 -
xxxxx
EVAPCONTROLCANISTER
EVAP PURGE CONTROL SOLENOIDVALVE 2P CONNECTOR (Cl08}
Wire side offemaleterminals
(cont'd)
-21511
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