1998 HONDA CR-V Ac and heat

PGM-FI System
Secondary Heated Oxygen Sensor (Secondary HO2SI (Sensor 2l (cont'dl
The scan tool indicates Diagnostic Trouble Code (DTC) P0138: A high voltage problem in the Secondary Heated
Oxygen Sensor (Secondary HO2S) (Sensor 2) circuit.
SECONDABY HO2S (Sonror 2)1P CONNECTOR rC721 l
sHo2s{WHT/REDI
sH()2sGIGFN/WHTI
Wire side of female terminals
PCM COI{NECTOR D {16PI
sHo2sG(RED/YELI
JUMPER WIRE
Wirc side ol lemale terminals
{To page 11-119)
1 1-1 18
The MIL hra b€on Eported on,OTC m138 b stor.d.
PJoblcm v6dtic.tion:1. Do the ECM/PCM Resot Pro-cedure,Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) trntilthe radiator lan comes on.Check the Secondary HO2S(Sensor 2) outpl.rt voltage at3,000 rpm with the scan tool.
Int.rmitto tailurc, syst.m b OKrt ihi! timo. Chack fo. poo. oon-noctioni or looaa wiiaa at C127lloc.ted on EcM/PcM br.cket),C721 (Second!ry llO2S, Sonlol2).nd at th. ECM/PCM.
Does the voltage stay at 0.6 Vor more?
Chock for an opon in the SocondaryHO2S:1. Turn the ignition switch OFF.2. Disconnect the SecondaryHO2S (Sensor 2) 4P connector.3. Connect the Socondary HO2S(Sensor 2) 4P connector ter-minals No. 1 and No. 2 with a
4. Turn the ignition switch ON {ll}.5. Check the Secondary HO2S{Sensor 2) output voltage withthe scan tool.
ls there 0.6 V or more?
Ch6ck for an open in thg wiro3(SH()2S, SG2 line3l:1. Turn the ignition switch OFF.2. Connect rcM connector termi-nals 014 and D13 with a
J!mper wite.3. Turn the ignition switch ON (ll).
4. Check the S€condary HO2S(S€nsor 2) output voltagewith the scan tool.
Rapair op6n in tho wir. b€{woantho PcM lDla or Dl3l .nd thoS.condlry HO2S {Senlor 21.
lsthere 0.6 V or more?
('97 model)
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PGM-FI System
Secondary Heated Oxygen Sensor (secondary HO2SI (sensor 2l (cont,d)
lTol3al The scan tool indicates Diagnostic Trouble Code (DTC) P0139: A slow response probtem in the Secondary Heated- Uxygen Sensor (HO2S) (Sensor 2l circuit.
- The MIL has b€en reoorted on.- DTC P0139 is storad.
Probl€m ve.itication:1. Do the ECM/PCM Reset Procedure,Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on.Check the Secondary HO2S(Sonsor 2) output at 3,000 rpmwith the scan tool.
lntehittont failure, 3ystem is OKat this time. Chock for poor con-nections o. loose wi.es at C127(located on ECM/PCM brack€t),C721 {Secondary HO2S, Sensor 2land at the EcM/PcM.
Does the voltage stay within0.3 - 0.6 V for two minutes?
11-120
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Heated Oxygen Sensor (HO2S| Heater
The scan tool indicatos Diagnostic Trouble Code (DTC) P0135: A problem in the Primary Heated Oxygen Sensor
{Primarv HO2S) (Sensor 1) Heater circuit.
The scan tool indicates Diagnostic Trouble Code (DTC) P0141: A problem in the Secondary Heated Oxygen Sensor
(Secondary HO2S) (Sensor 2) Heater circuit.
Fol3sl
Fo11tl
PBIMARY HO2S ls.n.or ll 4PCONNECTOR (CI 1 1 I, SECONDARYHO2S ls.n.o.2l aP CONNECTORlc721l.
Terminal side of male t€rminals
PRIMARY HO2S lson.o. 1l aPCONNECTOR {Cl 1 1 }, SECONDARYHO2S ls.nror 21 4P CONNECTORtcr21l.
so2sHTctBLK/WHn.
PO2SHTC(BLK/
WHTItGlIBLKAAIHTI'
Wire sid€ of lemale terminals
('97 model: To page '11-122)
('98 - 00 models: To page 11-'123)
*: P0141
('97 model: To page'11-122)
1'98 - 00 modelsl To page 11-123)(cont'd)
11-121
- Th6 MIL h.. bocn roponod on.- DTC P0135, and/oi mlal arestored.
Probl.m verification:1. Do the ECM/PCM Resot Pro-cedure,2. Start the engine.Int.rrnittaii frilurc, awtom ir OKat thi3 time. Chock lor poor con-n.ctiona or loosa wiro3 !t C111
lPrim.ry HO2S, Sen3o. 11. C12?llocatcd on ECM/PCM br.ck.t),C721 lsocond.ry Ho2s, s.n3or2r and at tho ECM/PCM.
Ch.ck ior an opon or shoYt in theHO2S:1. Turn the ignition switch OFF.2. Disconnoct the Ho2s (Primary
or Secondary*) (Sensor 1 orSensor 2)4P conneclor.3. At the HO2S side, measureresistance between the HO2S4P connector terminals No. 3and No.4.
ls there 10 - 40 0?
Check for continuity betweenbody ground and the HO2S 4Pconnector terminals No. 3 andNo. 4 individually.
Check tor an op6n or 3hort in thewires IPO2SHTC, SO2SHTC'linel:1. Turn the ignition swhch ON {ll).2. Moasure voltage between theHO2S 4P connector terminalsNo.3 and No.4.
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PGM-FI System
Heated Oxygen Sensor IHO2S) Heater (cont'd)
{'97 model)
(From page l1-121)
PRIMARY HO2S (S.nsor 1) ap CONNECTOR{cl111
| 112 ||.i-l
13 .l
'ot X-tErK/ (9YELI -L
Wire side of female terminals
SECONDARY HO2SISENSOR 21 4P CONNECTORlcr21l,
IGl IBLK/WHTI
Wire side ol female terminals
Wire side of female terminals
So2HTCIALK/WHTI* PO2SHTCIBLK/WHTI
Chock for en open or lhort in thewire (lG1 line):Measure voltage between theHO2S 4P connector terminal No.3 (secondary: No. 4) and bodyground,
Reprir op6n or 3hort in thc wircbetwo.n th€ No. 15 ALTERNA-TOR SP SENSOR (7.5 Al fu!. rndtho HO2S (Primary. Socond.ry*).
Ch€ck for an open in the wire(PO2SHTC, SO2SHTC. lin€):1. Turn the ignition switch OFF.2. Reconnect the HO2S 4P con-
3. Disconnect the PCM connec-tor A (32P).4. Turn the ignition switch ON (ll).5. Measure voltage betweenPCM connector t€rminals 46and A10 (A5 and A10)*.
Bepair opon in the wiro botwoonthe PcM (A6. A5lr and tho Ho2s{Prim.ry, Socond!ryr}.
ls thero 0.1 V or less?
Substitute a lnown-good PCMand recheck. lt 3ymptom/indica-tion goes away, .oplaco the origi-nal PCM.
Check fo. a ahort in the wireIPO2SHTC, SO2SHTC. lins):1. Turn the ignirion switch OFF.2. Disconnect the PCM con-nector A {32P).3. Check lor continuily betweenthe PCM connector terminal46 (A5)* and body ground.
Bopair short in the wire lrotwsentho PC{r4 {A6, A5rl and the HO2SlPiimary, S€condary.l.
Substitute a known-good PCMand .echgck. lf 3ymptom/indica-tion go€s awry. repl.cethe origi-nal PCM.
11-122
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PGM-FI System
Fuel Supply System
[POliil The"""ntool indicates Diagnostic Troubte Code (DTC) p0'171:Thefuet system istoo lean.
[Fo17ZJ rh""""ntool indicates Diagnostic Troubte code {DTc) p0172:Thefuel svstem istoorich.
Description
By monitoring the Long Term Fuel rrim, long term malfunctions in the fuel system will be detected.lf a malfunction has been detected during two consecutive trips, the MIL will come on and DTc p0171 and/or pol72 will bestored.
NOTE: lf someof the DTCS listed below are stored atthesametimeas DTC P017'l and/or p0172, troubleshoot those DTcsfirst, then troubleshoot DTC P0171 and/or PO1i2.
P0107, P0108, P1128, P'1129: MAP Sensor
P0135: Primary HO2S (Sensor 1)Heater
P0137, P0138: Secondary HO2S {Sensor 2)P0141: Secondary H02S (Sensor 2) Heater
P0441*r: EVAP System lnsufficient Purge FtowP1456*,, P'l457 *?i EVAP System Insufficient purge Ftow
Possible Cause
DTC P0171
too lean
*1: '97 model*2: '98 - 00 models
Fuel Pump insufficient flow/pressure
Fuel Feed Line clogged. leaking
Fuel Pressure Regulator stuck openFuel Filter clogged
Fuel Injector clogged, air leakage
Gasoline doesn't meet Owner's Manual spec.Primary HO2S (Sensor 1) deteriorated
Valve Clearance
Exhaust leak
Fuel Pressure Regulator clogged, stuck closedFuel Return Pipe clogged
Fuel Injector leaking
Gasoline doesn't meet Owner's Manual spec.Primary H02S (Sensor 1) deteriorated
EVAP Purge Control Solenoid Valve leaking, stuck openedValve Clearance
DTC P0172
flch
11-124
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ldle Speed Setting
Inspoction/Adiustmont
37 modsl:
NOTE:
. Before setting the idle speed, check the following
items:- The MIL has not been reportsd on.- lgnition timing- Spark plugs
- Air cleaner- PCV system
. lcanada) Pull the parking brake lever up. Stan the
engine, then check that the headlights are off.
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 or a Honda PGM Tester.
Disconnect the 2P connector from the ldle Air Con-
trol (lAC) valve.
IAC VALVE
lf the engine stalls, restart the engine with the accel-
erator pedal slightly depr6ss6d, Stabilize the rpm at
1,000, then slowly release the pedal until the engine
idles.
Check idling in no-load conditions: hsadlights,
blower fan, rear d€fogger, radiator fan, and air con-
ditioner are not operating.
ldle spood should b.:
{80 t 50 rpm {in Park or noutr.ll
IDLE
7.
Adjust the idle sp6ed,
idle adjusting screw.
if necessary, by turning the
Turn the ignition switch OFF.
Reconnect the 2P connector to the IAC valve, then
remove the BACK UP (RAD|Ol (7.5 Al fuse in the
under-hood fuse/rslav box for 10 seconds to reset
the PCM.
Restart and let the engine idle with no-load condi-
tions for one minute, then check the idle speed.
NOTE: (Canadal Pullthe parking brake lever up. Stan
the engine, then check that the headlights are off.
ldlo Ep€ed rhould be:
75O t 50 rpm (in P.rk or noutr.ll
Let the engine idl6 for one minute with the head-
lights (Low) ON, and check th€ idl€ speed.
ldle lpcod 3hould bo:
750 t 50 ]pm (in Park or nautlal)
Turn the headlights off. Let th€ engine idle for one
minute with the headlights (Low) ON, heater fan
switch at Hl and air conditioner on. then check the idle
sDeeo.
ldl. specd should b6:
7d) 1 50 rpm {in Park or nautral}
lf the idle speed is not within specification, see the
symptom chart on page 11-64. (cont'd)
1 1-169
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ldle Control System
ldle Speed Setting (cont'd)
38 - 0O mod6l3:
NOTE: Before setting the idle speed, check the follow-
ing items:- The MIL has not been reported on.- lgnition timing- Spark plugs
- Air cleaner- PCV system
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.
Disconnect the IAC valve 2P connector and the EVAP
purge control solenoid valve 2P connector.
CONTROLSOLENOID VALVE
SOLENOID VALVE
lf the engine stalls, restart the engine with the accel-
erato. pedal slightly depressed. Stabilize the rpm at
1,000, then slowly release the pedal until the engine
idles.
Che€k the idle in no-load conditions: headlights, blow-
er fan, rear defogger, radiator fan, and air conditioner
are not operating,
ldle speed should bo:
480 t 50 rpm {in PErk or noutrall
11-170
lf necessary, adjust the idle speed, by turning the
idle adjusting screw.
After adjusting the idle speed, recheck the ignition
timing (see section 4). lf it is out of spec, go back to
steo 4.tDt.E
6. Turn the ignition switch OFF.
7. Reconnect the 2P connectors to the IAC valve and
the EVAP purge control solenoid valve, then do the
ECM/PCM reset procedure.
8. Restart and idle the engine with no-load conditions
for one minute, then check the idle speed.
ldle speod should be:,98 model:
750 t 50 rpm tin Park or neutral)'9!l - 00 modsls:
730 i 50 lpm lin Psrk or neutral)
NOTE: lf the idle speed increases to 780 t 50 rpm(770 1 50 rpml*, this means the EVAP system is
purging the canister. To stop the purging temporari-
ly, raise the engine speed above 1,000 rpm with the
accelerator pedal, then slowly release the pedal.*: '99 - 00 models
9. Let the engine idle for one minute with the head-
lights (Low) ON, and check the idle speed.
ldle speed should be:
38 mod6l:
750 f 50 rpm (in Palk or neutrall'99 - 00 modols:
730 t 50 rpm (in Palk or neutral)
10. Turn the headlights off. Let the engine idle for one
minute with the heater fan switch at Hl and air con-
ditioner on, then check the idle speed.
ldls spqed should be:'98 model:
780 t 50 rpm (in Park or neutrall'99 - 00 mod€ls:
7701 50 rpm lin Park or neutral)
lf the idle speed is not within specification. see the
Symptom Chart on page 11-64.
ADJUSTING
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Fuel Tube/Ouick-Gonnect Fittings
Procautions
@ Do not smoke whils working on the fuel
syst6m, Koop open flames away from your work ar9a.
The fuel tube/quick-connect fittings assembly connects
the in-tank fuel pump with the fuel feed pipe. For remov-
ing or installing the fuel pump and fuel tank, it is neces-
sary to disconnect or connect the quick-connect fittings.
Pay attention to following;
. The fuel tube/quick-connect fittings assembly is not
heat-resistant; be careful not to damage it during weld-
ing or other heat-generating procedures.
. The fuel tube/quick-connect fittings assembly is not
acid-proof; do not touch it with a shop towel which
was used for wiping battery electrolyte. R€place the
fuel tube/quick-connect fittings assembly if it came
into contact with electrolyte or somethino similar.
. When connecting or disconnecting the fuel tube/quick-
connect fittings assembly, be careful not to bend or
twist it excessively, Replace it if damaged,
A disconnected quick-connect fittings can be reconnected,
but the retainer on the mating pipe cannot be reused once
it has been removed from the pipe. Replace tha retainer
. replacing the fuel pump.
. replacing the fuelfeed pipe,
. it has been removed from the Dioe,
. it is damaged.
RCTAINERFUEL TUBE
CONNECTOR
CONNECTOR
RETAINER
11-175
Disconnection
!@ Do not smoke while working on the fuel
syst6m. Keep open flames away from your work area.
1. Disconnect the battery negative cable.
2. Remove the fuel fill cap to relieve fuel pressure in
the tank.
3. Relieve fuel pressure (see page 11-178).
4. Check the fuel quick-connect fittings for dirt, and
clean if necessary.
5. Hold the connector with one hand and press down
the retainer tabs with the other hand. then pull the
connector off.
NOTE:
. Be careful not to damage the pipe or other parts.
Do not use tools,
. lf the connector does not move, keep the retainer
tabs pressed down, and alternately pull and push
the connector until it comes off easily.
. Do not remove the retainer from the pipe; once
removed, the retainer must be replaced with a
new one.
LOCKII{G PAWL
RETANEN TAB
@NNCCTOR
Press down.
6. Check the contact area of the pipe for dirt and dam-
age.
. lf the surface is dirW, clean it
. lf the surface is rusty or damaged, replace the fuel
pump or fuel feed pipe,
CONTACT ANEA
{cont'd}
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