TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS~
EVAP Canister PurgeControl Solenoid Valve
(Cont'd)
MIl
models exceptforEurope andIsrael
EC-PGC/V-01
IGNITION SWITCH
ON or START
10A
1251
FUSE
BLOCK
(JIB)
~
Refer
toEL-POWER.
_. Detectable line
for DTC
-: Non-detectable
line forDTC
BR
IlIDl
',=@
BR
I
BR
OCIEVAP CANISTER
PURGE CONTROL
SOLENOID VALVE
'4=JlCW
P
I
~cm
a:IID
G
fmjl
I
I~
CEID
45678 WP
~
PURGE ECM
(ECCS
CONTROL
MODULE)
. (ill
Refertolast page
(Foldout page).
HEC041
EC-180
•
INSPECTION
START
m
CHECK VACUUM SOURCETOEVAP OK
CHECK COMPONENT
CANISTER.
L---.
(EVAPcanister).
1. Jack updrive wheels. (See
page EC-29.)
2. Start engine andwarm itup suffi- If
NG, replace EVAPcan-
ciently. ister.
3. Perform diagnostic testmode II(Self-
diagnostic results).Makesurethat
9iagnostic troublecodeNo.55isdis-
played.
4. Disconnect vacuumhosetoEVAP
canister.
5. Set shift lever to1st position.
6. Make surethatvacuum existsunder
the following conditions.
At Idle:
Vacuum shouldnotexist.
Racing enginefromIdleto3,000 rpm:
Vacuum shouldexist.
NG
Ii)
[!J
CHECK CONTROL FUNCTION. OK
Check vacuum hosefor
1. Check voltage between ECMterminal
--..
clogging, cracksor
@
andground withCONSULTor improperconnection.
tester underthefollowing conditions.
Voltage: At idle
Approximately OV
Engine speedisabout 2,000rpm
Battery voltage
NG
I!l
CHECK POWER SUPPLY. NG
Check thefollowing.
1. Stop engine.
I-----.
•Harness connectors
2. Disconnect EVAPcanister purgecon-
QD,@
trol solenoid valveharness connector. •10A fuse
3. Turn ignition switch"ON". •
Harness foropen or
4. Check voltage between terminal
@
short
between EVAP
and ground withCONSULTor tester. canister
purgecontrol
Voltage: Batteryvoltage
solenoid
valveandfuse
r
K If
NG, repair harness or
connectors.
SEF816F
SEF488Q
MEC325B
MEC296BB
Clogging TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
[ill
EVAP Canister PurgeControl Solenoid Valve
(Cont'd)
DIAGNOSTIC PROCEDURE
~i5
ECM
B
CONNECTOR
II
'f
~VV1
~ Crack
~i5
~
=:5---
~ Improperconnection
@
EC-181
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
EGR Valve andEVAP Canister PurgeControl
Solenoid Valve
For Europe, IsraelandAustralia, andGA15DE MIT
models
SYSTEM DESCRIPTION
Camshaft positionsensor
Engine coolant temperature sensor
Mass airflow sensor
Throttle position sensor
Ignition switch
Vehicle speedsensor Engine
speed
Engine coolant temperature
Amount ofintake air
Throttle position
Start signal
Vehicle speed ECM
(ECCS
control module) EGR
valve
&
EVAP canister
purge control
solenoid valve
•
This system cutsandcontrols theport vacuum
applied tothe EGR valve andEVAP canister
purge control solenoid valvetosuit engine oper-
ating conditions.
This cut-and-control operationisaccomplished
through theECM. When theECM detects anyof
the following conditions, currentflowsthrough
the solenoid valveinthe EGR valve andEVAP
canister purgecontrol solenoid valvecontrol vac-
uum line. This
causes theport vacuum tobe discharged
into theatmosphere sothat theEGR valve and
EVAP canister purgelineremains closed.
• Engine starting
• Closed throttle position
• Low andhigh engine coolant temperature
• During deceleration
• Engine stopped
• Vehicle speed:below10km/h (6MPH)
• Mass airflow sensor malfunction
SEF783K
l#
Intake
manifold
vacuum signal
SEF240PF COMPONENT
DESCRIPTION
Exhaust gasrecirculation (EGR)valve
The EGR valve controls theamount ofexhaust gasrouted tothe
intake manifold. Vacuumisapplied tothe EGR valve in
response tothrottle valveopening. Thevacuum controls the
movement ofataper valve connected tothe vacuum diaphragm
in the EGR valve.
EGR valve andEVAP canister purgecontrol solenoid
valve
The EGR valve andEVAP canister purgecontrol solenoid valve
responds tosignals fromtheECM. When theECM sends anON
(ground) signal,thecoil inthe solenoid valveisenergized. A
plunger willthen move tocut the vacuum signal(fromthethrot-
tle body tothe EGR valve andEVAP canister purgevalve).
When theECM sends anOFF signal, thevacuum signalpasses
through thesolenoid valve.Thesignal thenreaches theEGR
valve andEVAP canister.
EC-183
INSPECTIONSTART
m
CHECK OVERALL FUNCTION.
~INSPECTION
END
1) Jack updrive wheels.
2) Start engine andwarm itup suffi-
ciently.
3) Perform diagnostic testmode II(Self-
diagnostic results).
Make surethatdiagnostic trouble
code No.55isdisplayed.
4) Set theshift lever to1st position.
5) Make surethatEGR valve spring
moves upand down (Useyourfin-
ger) under thefollowing conditions.
At idle:
SprIng doesnotmove.
RacIng engIne fromidleto3,000
rpm:
Spring moves upand down.
NG
l!1
CHECK VACUUM SOURCES TOEGR OK
CHECK COMPONENTS
VALVE ANDEVAP CANISTER.
-----...
(EGRvalve, EGRC-BPT
1) Disconnect vacuumhosestoEGR valveandactivated EVAP
valve andEVAP canister. canister).
2) Make surethatvacuum existsunder Refer
to"COMPONENT
the following conditions. INSPECTION".(Seepage
At idle:
EC-188.)
Vacuum shouldnotexist.
lNG
Racing engine fromidleto3,000
rpm: Vacuum shouldexist.
Replace
malfunctioning
component(s).
NG
[!J
I!l
CHECK CONTROL FUNCTION. OK
CHECK VACUUM HOSE.
1) Check voltage between ECMterminal
----..
1)Check vacuum hose
@
or
GID
andground underthe forclogging, cracksor
following conditions. improper
connection.
Voltage: At Idle
Approximately OV
Engine speedis2,500 rpm
Battery voltage
~NG
SEF179R
~=.
Crack
Clogging MEF51BE
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
[]K]
EGR Valve andEVAP Canister PurgeControl
Solenoid Valve(Cont'd)
DIAGNOSTIC PROCEDURE
~I)
~ID
ECM
-gcoNNEcTORII ~
103 105
~.1
@ :
For Australia
@ :
Except forAustralia
II
Cf~H
~
~ Improperconnection
SEFB16F
EC-186
2:
1
:>
Q)
Ol
~
0
>
::;
c.
::;
0
,,"--
0
-
Rich- Idealratio _
Lean
Mixlure ratio
SEF288D
•
Zirconia
tube SEF406H
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Heated Oxygen Sensor(H02S)(Cont'd)
The heated oxygen sensorisplaced intotheexhaust manifold.
It detects theamount ofoxygen inthe exhaust gascompared
to the outside air.The heated oxygen sensorhasaclosed-end
tube made ofceramic zirconia. Thezirconia generates voltage
from approximately 1Vinricher conditions to
av
inleaner con-
ditions. Theheated oxygen sensorsignalissent tothe ECM.
The ECM adjusts theinjection pulseduration toachieve the
ideal air-fuel ratio.Theideal air-fuel ratiooccurs neartherad-
ical change from1Vto
av.
L
Healerpad
Isolalion
bearing
m
•MIXTURE RATIOTEST.
ACCELERATE TO2000
RPM AND HOLD THEN
TOUCH START
I£J
1800
20002200
~J
NEXT
II
START
SEF815L
m
*
MONITOR
*
NO FAIL
D
CMPS.RPM (REF)2000rpm
MIR FICMNT RICH
DIAGNOSTIC
PROCEDURE
RECORD
\ I/
........ e",/
- CHECK-
",/
........
/ I\
I
SEF522Q
INSPECTION
START
CHECK OXYGEN SENSORCIRCUIT.
1) Start engine andwarm itup suffi-
ciently.
(F.i\
2)Perform "MIXTURE RATIO
~ TEST"in"FUNCTION TEST"
mode withCONSULT.
OR
(F.i\
2)Make surethat"M/R
FIC
~ MNT"in"DATA MONITOR"
mode indicates "RICH"and
"LEAN" periodically more
than 5times during 10 sec-
onds at2,000 rpm.
OR
fti>\
2)Stop engine andsetECM
~ Diagnostic TestMode
/I
(Heated oxygensensormoni-
tor).
3) Restart engineandrunitat
about 2,000rpmforabout 2
minutes underno-load.
4) Keep engine speedat2,000
rpm andmake surethatthe
malfunction indicatorlampon
the instrument panelgoeson
and offmore than5times dur-
ing 10seconds.
NG
@
OK
INSPECTION END
Malfunction indicator
lamp SEF051PA
EC-191
I;)
1
CHECK INPUTSIGNAL CIRCUIT. NG
Repair harness orcon-
1. Stop engine.
--.
nectors.
2. Disconnect ECMharness connector
and heated oxygen sensorharness
connector.
3. Check harness continuity between
ECM terminal
@
or
@
and terminal
@.
Continuity shouldexist.
If OK, check harness forshort.
1
0K
CHECK HEATED OXYGEN SENSOR OK
Goto"CHECK
HEATER CIRCUIT.
--.
COMPONENT".
1. Reconnect harnessconnectors.
2. Start engine.
3. Check voltage between ECMterminal
@
(ForEurope andIsrael) or
@
(For Australia AfTmodels) and
ground withCONSULTor tester
under thefollowing conditions.
Voltage:
Engine speedisbelow 3,200rpm
Approximately OV
Engine speedisabove 3,200rpm
Battery voltage
NG
[!J
CHECK POWER SUPPLY. NG
Check thefollowing.
1. Stop engine.
~
•Harness connectors
2. Disconnect heatedoxygen sensor
aD,@
harness connector. •10A fuse
3. Turn ignition switch"ON".
•Harness foropen or
4. Check voltage between terminal
@
shortbetween heated
and ground. oxygensensorand
Voltage: Batteryvoltage fuse
If NG, repair harness or
OK connectors.
CHECK OUTPUT SIGNALCIRCUIT. NG
Repair harness orcon-
1. Turn ignition switch"OFF".
-----...
nectors.
2. Disconnect ECMharness connector.
3, Check harness continuity between
terminal
G)
and ECM terminal
@
(For Europe andIsrael) orGill (For
Australia
AfT
models) .
Continuity shouldexist.
If OK, check harness forshort.
t
OK
SEF180R
SEF646P
SEF181R
~i5
cilltD
@:
ForAustralia NTmodels
@:
ForEurope andIsrael
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Heated Oxygen Sensor(H02S) (Cont'd)
@
~
~
I;) ~i5
Il
ECM
'QcoNNECTORII
46 19
For Europe andIsrael, andGA15DE.L.J
engine models
Engineground
@,
@
----- \
~ ~
'1
\
.~
,~\ C/
Power steering",
fluid reservoir __\ ~
W~
:'C"",,
EC-192
TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Oxygen Sensor(02S)(Cont'd)
The 028 isplaced intotheexhaust manifold. Itdetects the
amount ofoxygen inthe exhaust gascompared tothe outside
air. The sensor hasaclosed-end tubemade ofceramic zirco-
nia. The zirconia generates voltagefromapproximately 1Vin
richer conditions toOV inleaner conditions. Thesensor signal
is sent tothe ECM. TheECM adjusts theinjection pulsedura-
tion toachieve theideal air-fuel ratio.Theideal air-fuel ratio
occurs neartheradical change from1VtoOV.
r
Connector
Isolation bushing
Contact plate
Oxygen
sensor
Louver
Zirconia tube
Holder AEC854
,'--
~
:>
Q)
OJ
.!!1
~ '5
0-
'5
o
o
Rich --- Idealratio
Mixture ratio_
Lean
SEF288D
m
•MIXTURE RATIOTEST.
ACCELERATE TO2CXXJ
RPM AND HOLD THEN
TOUCH START
~
1800 2CXXJ2200
~J
NEXT
II
START
SEF815L
m
1;{MONITOR 1;{NO FAIL
D
CMPS.RPM (REF)
2000rpm
MIR FICMNT RICH
RECORD \ I/
'~/'
- CHECK-
/
"-
I
I\
I
SEF522Q DIAGNOSTIC
PROCEDURE
INSPECTION START
CHECK OXYGEN SENSORCIRCUIT.
1. Start engine andwarm itup suffi-
ciently.
(F.i\
2.Perform "MIXTURE RATIO
~ TEST"in"FUNCTION TEST"
mode withCONSULT.
OR
(F.i\
2.Make surethat"M/R FIC
\..!!J
MNT"in"DATA MONITOR"
mode indicates "RICH"and
"LEAN" periodically more
than 5times during 10sec-
onds at2,000 rpm.
OR
~ 2.Stop engine and'set ECM
~ Diagnostic TestMode II(Oxy-
gen sensor monitor).
3. Restart engineandrunitat
about 2,000rpmforabout 2
minutes underno-load.
4. Keep engine speedat2,000
rpm andmake surethatthe
malfunction indicatorlampon
the instrument panelgoeson
and offmore than5times dur-
ing 10seconds.
NG
@
OK
INSPECTION END
Malfunction indicator
lamp SEF051PA
EC-196
•
Repair
harness orcon-
nectors.
NG
OK
Loosen andretighten engineground
screws. CHECK
INPUTSIGNAL CIRCUIT.
1. Stop engine.
2. Disconnect ECMharness connector
and oxygen sensorharness connec-
tor.
3. Check harness continuity between
ECM terminal
@
or
@
and terminal
CD.
Continuity shouldexist.
If OK, check harness forshort.
~iV
@
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Oxygen Sensor(02S)(Conl'd)
@
~Io
ECM
19'
CONNECTOR
II
46 19
II
OK
Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
@:
ForAustralia M/Tmodels
@:
Except forEurope andIsrael
SEF182R
Trouble
isnot fixed.
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector. Reconnect ECMharness con-
nector andretest.
Troubleisnot fixed.
Replace oxygensensor.
CAUTION:
• Discard anyoxygen sensorwhichhasbeen dropped from
a height ofmore than0.5m(19.7 in)onto ahard surface
such asaconcrete floor;useanew one.
EC-197