1999 HONDA CR-V twc

The scan tool indicates Diagnostic Trouble Code (DTC) P0123: A high voltage problem in the Throttle Position
(TP) sensor circuit.
TP SENSOR 3P @]{NECTOR IC13O}
sG2(GnN/Br.XlvocrtYEt /8LU)
{GBIT/BLKI
(cont'd)
11-107
Wiro side of fom.le terminals
PCM CON'{ECTOF D I16PI
Wire side ot female terhinals
The MIL hlr br€n r.9ort.d on.DTC P0123 ir stored.
Pioblom vorificltion:1. Start the ongin6. Hold th€ongine at 3,000 rpm with noload {in Park or neutral) untilth6 radiator fan comes on.then turn the ignition switchOFF,2. Turn the ignition switch ON (ll).
3. Check the throttle position
with the scan tool.
Intarmittant tailuro, ryrtern b OKat this timo. Chock lor poor con-nections or loo3o wir€3 at C130
ITP 3orcorl .nd at tho ECM/FCM.
ls there spprox. 1oyo when thothrottle is Iully closed andapprox.90% when the throttleis tully open€d?
Choct toJ an opcn in th6 TP s6n-3t']:1. Turn the ignition switch OFF.2. Disconnect the TP sensor 3Pconnectol,3. Turn the ignition switch ON (ll).
4. At the wir6 harnoss side, mea-suro voltage betweon thg TPsensor 3P connector t€rminalsNo. 1 and No.3.
ls there approx.5 V?
Chack for an oDan in tha wira(SG2 linel:M6asu16 voltage b6tween PCMconn€ctor terminals Dl0 and D'! 1.
R.pai. opcn in tha wira botwcontho PcM {o111 rnd the TP 3en-3('t,
ls there approx. 5 V?
('97 model)
(To page 11-108)
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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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Emission Control System
Three Way Catalytic Converter {TWCI (cont'd}
1P0420 Thescantool indicates Diagnostic Trouble Code (DTC) P0420: Catalyst system efficiency belowthreshold.
DescriDtion
This system evaluates the catalyst's capacity by means of the HO2S (Primary and Secondary) output during stable driving
conditions. lf deterioration has been detected during three consecutive driving cycles, the MIL comes on and DTC P0420 will
be stored.
NOTE: lf some of the DTCS listed below are stored at the same time as DTC P0420, troubleshoot those DTCS first. then
troubleshoot DTC P0420.
P0137, P0138: Secondary HO2S (Sensor 2)
P0141: Secondary HO2S (Sensor 2) Heater
Possible Cause
. IWC Deterioration
. Exhaust system leakage
Troubleshooting Flowchart
- The MIL has been reDoried on.- DTC P0420 is stored.
Problem verification:1. Do the ECM/PCM Reset Procedure,2. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutrali untilthe radiator fan comes on.3. Connect the SCS service connector.4. Test-drive 40 - 55 mph (64 - 88km/h) for approx. lwo minutes.Then decelerate for at least 3seconds with the throftle completely closed. Then reducethe vehicle speed to 35 mph
156 km/h), and try to hold ituntil the readiness code
Intermittent tailure. system is OKat this time.ls DTC P0420 indicated?
Check the TWC (see section 9).lI nocessary, replace the TwC.
11-200
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Electrical Troubleshooting ('97 Model)
Troubleshooting Flowchart - Interlock System - Shift Lock System (cont'd)
INTERLOCK CONTROL UNITCONNECTOR {8P)
NOTE: Shift lever must be in E.
ATP P IBLK/BLU'
Wire side ot female terminals
SHIFT LOCKIYEL/BLK}
12
5678
o
LOCK SOLENOID
1
SHIFT LOCK !CONNECTORYEL/BLK
NOTE: Do not connect the No. 2 terminal tothe battery positive terminal or you willdamage the diode inside the shift lock sole-noid.
Wire side of female terminals
SHIFT L@K SOI.ENOIDCONNECTOBldir.sily on .olrnoidl
Terminalsido of male terminals
From page 14.89
Measu.e ATP P Voltage:Measure the voltage between theNo. 6 terminal of the interlockcontrol unit and body ground.
Repai. open in the wir6 betwoentho No.6 termin.l olthe intorlockcontrol unit and the A/T gealpo.ition rwitch.
Chock Shitt Lock Solenoid lor .nOpon Circuit:1. Turn the ignition switch OFF.2. Disconnect the shift lock solenoto connoctor.3. Check for continuity betweenthe No. 3 terminal of the inter-lock contrcl unit and the No. 2terminal ot the shift lock sole-noid connector.
Rapair opon in the wiro bstwcentho No. 3 torminal and tho shiftlock solenoid.
Check Shift Lock Solenoid Oper-ation:'1. Connect the No. 1 terminal ofthe shift lock solenoid connec-tor to the battery positive terminal. and connect the No. 2terminal to the battery nega-tive terminal.2. Chock the shift lock solenoidoperation.
Does the shift lock solenoidop€rate properly?Replsc€ tho .hift lock solonoid.
Check tor looso terminal frt in th6interlock cont.ol unit connectoB.ll ngcara,lary, sutEtitut€ a known-good interlock control unit androcheck.
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Power Steering Gearbox
Removal
Note these items during removal:
. Using solvent and a brush, wash any oil and dirt off
the valve body unit its lines, and the end if the gear-
box. Blow dry with compressed air.
. Be sure to remove the steering wheel before discon-
necting the steering joint. Damage to the cable reel
can occur.
. With 4WD. tilt the engine with a jack to expand the
clearance between the transfer assembly and rear
beam when removing the steering gearbox from the
rear oeam.
Do not remove the steering gearbox by removing the
transfer assembly from the transmission.
1. Drain the power steering fluid as described on page'17-15.
Raise the vehicle, and suppon it on safety stands in
the proper locations (see section 1).
Remove the front wheels,
Remove the drive/s airbag assembly {see section 24).
Remove the steering wheel {see page 17-18).
Remove the steering joint bolts, then disconnect the
steering joint by moving the joint toward the column.
UPPER JOINT BOLT
LOWER JOINT BOLT
13.
7. Remove the cotter pin from the nut, and remove the
castle nut {'97 - 98 models) or hex nut ('99 - 00
models).
COTTER PINReplace.
Install the 10 mm hex nut on the ball joint. Be sure
that the 10 mm hex nut is flush with the ball joint
pin end, or the threaded section of the ball joint pin
might be damaged by the special tool. Refer to sec-
tion 18 for ball joint remover usage instruction, Be
careful not to damaging the ball joint boot.
Separate the tie-rod ball joint and knuckle using the
special tool.
Remove the right and left tie-rod ends, then extend
the rack all the way to the right.
Remove the TWC (see section 9).
Disconnect the shift linkage from the transmission
(M/T: see section 13, A/T: see section 14).
With 4WD. separate the propeller shaft and transfer
assembly (see section 161.
10.
11.
(cont'd)
17-31
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't 4.
15.
Center the steering rack within its stroke.
Install the steering joint, and reconnect the steering
shaft and pinion shaft.
NOTE: Make sure the steering joint is connected as
follows.
a. Insen the upper end of the steering joint onto the
steering shaft (line up the bolt hole with the flat
on the shaft).
UPPER JOINT BOLT22 N.m12.2 kgf.m, 16lbl.ft,
STEERING JOINT
COLUMNSHAFTLOWER JOINT BOLT22 N.m12.2 kgf.m, 16lbtftl
UPPER JOINT BOLTBolt must line upwith tlat on shatt.
LOWER JOINT BOLTBolt must line up withgroove around on shaft.
PINIONSHAFT
b, Slip the lower end of the steering ioint onto the
pinion shaft.
c. Install the lower joint bolt (line up the bolt hole
with ths groove around the shaft). Be sure that
the lower joint bolt is securely in the groove in
the pinion shaft.
d. Pull on the steering joint to make sure that the
steering joint is fully seated.
e, Install the upper joint bolt,
Reinstall the steering wheel {see page'17-19).16.
17-53
17. Wipe off any grease contamination trom the ball
joint tapered section and threads then reconnect the
tie-rod ends to the steering knuckles. For'97 - 98
models; torque the castle nut to the lower torque
specification, then tighten it only far enough to
align the slot with the pin hole. Do not align the nut
by loosening. Install new cotter pins.
CAST1T NUT(9t - 98modol!)
HEX NUTl'g!t - 00 modeb)il:l N.m14.4 ksl.m,32 tbf.f0
39 - iU N'm
lil.o - 4.8 kgl.m,
29 - 35 tbf.ftl
18.
19.
20.
21.
22.
23.
'99 - lD modeb:
COTTER PINRePlace.on reassembly, bendthe cotter Pin as shown.
With 4WD, connect the propeller shaft and transfer
assembly (see section 16).
Connect the shift linkage to the transmission (M/T:
see section 13, A,/T; see section 14).
Installthe Twc (see section 91.
lnstall the front wheels,
Fill the system with power steering fluid, and bleed
air from the system (see page 17-15).
After installation. perform the following checks.
. Start the engine, allow it to idle, and turn the
steering wheel from lock-to-lock several times to
warm up the fluid. Check the gearbox for leaks
(see page 17-23).
. Adjust the front toe (s€e section 18).
. Check the steering wheel spoke angl€. Adjust by
turning the right and left tie-rods equally, if nec-
essary.
TIE.ROO END
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Troubleshooting
A/G System {cont'd)
From page 22-37
A/C PRESSURE SWITCHCheck th€ A/C pressure switch:1. Turn the ignition switch OFF.2. Check lor continuity bgtweenthe No. 1 and No.2 terminalsofthe A,/C pressure switch.
Check for proper Ay'C system pressure.
Roplece tha A/C pr€ssure switch.
Chock lor an opgn in thg wire:1. Feconnect the A/C pressure
switch 2P connector,2. Remove the heater controlpanel (see page 22-46).3. Turn the ignition switch ON llli.4. Measure the voltage betweenthe No. 10 terminal of theheater control panel 20P con-nector and body ground.
Repair open in the wir. botwcenthe A/C pres3ur€ switch and theheater control oanel.ls there approx. 5 volts?
Check lor loos6 wiras or pool
connections at the heater controlDanel 20P connoctor and at theA/C pr.ssule switch 2P connsc-tor. lf the connections ere good,
substitute a known-good heatarco trol pangl, end recheck. lf thesymptom/indication goes away,replace the original heater conlrolpanel.
HEATER CONTROL PANEL 2OP CONNECTOR
Wire side ol female terminals
22-38'
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Both heater and A/C do not work.
Check the No. 17 (7.5 A)fuse in theunder-dash fuse/relay box, and theNo. 47 (7.5 A) fuse in the under-hood luse/relay box.
nophcc ih. fur.l.l, .nd r.check.
Check tor rn open in the wiro:1. Remove the heater controlpanellsee page 22 46).2. Turn the ignition switch ON (ll).3. Measure the voltage betweenthe No. 1 terminal of theheater control panel 8P con-nector and body ground.
R.pair opan in lha wlra batw.cnthe No. 1? fuaa and tha h.ltcrcontrol panal.ls thero battery voltage?
Chgck for an opan in th€ wirg:1. Turn the ignition switch OFF.2. Measure the voltage betweenthe No. l l terminal of thoheater control panel 20P con-noctor and body ground.
Repsil opon in tha wi.a batwcanth. No. 47 tur. and tho hoitorcontlol panol.
ls there battery voltags?
Check for an opon in the wire:Ch6ck lor continuity betwoen theNo. 7 terminal of the heater con-trol panel 8P connector and bodyground.
Check for an opon in tho wirab6{woon tho hoatar control p.noland body ground. It the wir. i3OK, chsck for poor ground rtGlOl lnd Glo2.
Check for loose wire3 or oooaconnection3 at the haater controlprnol 8P and 20P connoctors. Itthc conncction3 are good, substi-tuta a known-good h€ater con-trol prnol, and rechecft. lf thesymptom/indic.lion go.3 ewry,repl.cg the original ha.ter con-tlol oancl.
HEATER CONTROL PANEL 8P CONNECTOR
Wire side ot female terminals
HEATER CONTROL PANEL 2OP CONNECTOR
I2A,/1,/58910
1t12131a151517181920
WHT/BLU
Wire side of female terminals
23
{578
BLK
0
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