2005 TOYOTA AVENSIS Service Repair Manual

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Page 201 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual ± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±73
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0300 RANDOM/MULTIPLE CYLINDER MISFIRE
DETECTED
DTC P0301 CYLINDER 1 MISFIRE DETECTED
DTC P0302 CYLINDER 2 MISFI

Page 202 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A12490
Injector Signal Waveform
20 V/
Division
GND GND(Magnification)
20 V/
Division
50 m sec. / Division (Idling) 1 m sec. / Division (Idling)
Infection duration
A79071
From
Terminal 3
of IG2 Relay

Page 203 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual ±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±75
AVENSIS REPAIR MANUAL (RM1018E)
CONFIRMATION DRIVING PATTERN
(a)Connect the hand±held tester to the DLC3.
(b)Record the DTC and freeze frame data.

±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±75
AVENSIS REPAIR MANUAL (RM1018E)
CONFIRMATION DRIVING PATTERN
(a)Connect the hand±held tester to the DLC3.
(b)Record the DTC and freeze frame data.
(c)Use the hand±held tester to set to the check mode (See page 05±5).
(d) Read the value on the misfire counter for each cylinder when idling. If \
the value is displayed on the
misfire counter, skip the following procedure of confirmation driving.
(e) Drive the vehicle several times with the engine speed, load and its surr\
ounding range shown with EN- GINE SPD, CALC LOAD in the freeze frame data or MISFIRE RPM, MISFIRE LOAD in\
the data list.
If you do not have the hand±held tester, turn the ignition switch OFF after the symptom is simulated
once. Then repeat the simulation process again.
HINT:
In order to memorize the DTC of the misfire, it is necessary to drive arou\
nd MISFIRE RPM, MISFIRE LOAD
in the following data list. Be sure not to turn the ignition switch OFF, because the diagnosis system is changed
from the check mode to the nomal mode and will result in all of the DTCs and\
the freeze frame data being
erased.
Engine SpeedTime
Idling5 minutes and 45 seconds or more
1,000 rpm4 minutes or more
2,000 rpm2 minutes and 30 seconds or more
3,000 rpm1 minute and 30 seconds or more
(f) Check if there is misfire by monitoring the DTC and the freeze frame data, an\
d then record them.
(g) Turn the ignition switch OFF and wait for at least 5 seconds.
INSPECTION PROCEDURE
HINT:
If the other DTCs besides misfire are memorized simultaneously, perform the troubleshooting for them
first.
Read freeze frame data using \f \b \f\f
Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, it is useful for d\
etermining whether the vehicle
was running or stopped, the engine was warmed up or not, the air±fuel ra\
tio was lean or rich, etc. at
the time of the malfunction.
If the misfire is not occured when the vehicle is brought to the workshop,\
it can be confirmed by repro-
ducing the condition of the freeze frame data. After finishing the repai\
r, confirm that there is no misfire
(See the confirmation driving pattern).
When either of SHORT FT #1 or LONG FT #1 the freeze frame data is over the range of 20%, there
is a possibility that the air±fuel ratio is inclining either to ºR\
ICHº (±20% or less) or ºLEANº (+20% or
more).
When COOLANT TEMP in the freeze frame data is less than 80
C (176
F), there is a possibility of
misfire only during warming up.
In case that the misfire cannot be reproduced, this may be because of th\
e driving with the shortage
of fuel, the use of improper fuel, a stain of ignition plug and etc.

Page 204 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 05±76
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
1CHECK OTHER DTC OUTPUT(BESIDES MISFIRE DTCS)
(a)Read the DTC using the hand±held tester. Result:
Display (DTC outp

Page 205 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A18294
#40#30#20#10E01
ECM Connector
E13
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±77
AVENSIS REPAIR MANUAL (RM1018E)
5CHANGE NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER
(See page

Page 206 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A65743
E13ECM Connector
#40#30#20#10
A79064
Engine Room R/B No.4
IG2 Relay
12
A61031
Wire Harness SideI5
I6I7I8
Injector Connector
05±78
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAI

Page 207 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual ±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±79
AVENSIS REPAIR MANUAL (RM1018E)
12CHECK VALVE CLEARANCE OF MISFIRING CYLINDER (See page 14±6)
NGADJUST VALVE CLEARANCE
OK
13SWITCH STEP BY NUMBER O

Page 208 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 05±80
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
NGREPLACE MASS AIR FLOW METER
OK
17INSPECT ENGINE COOLANT TEMPERATURE SENSOR(RESISTANCE) (See page 10±3)
NGREPLACE

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