2005 TOYOTA AVENSIS Service Repair Manual

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Page 4401 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A90876
D22
Front View
Wire Harness Side:
Differential pressure
Sensor Connector
VP
VC
GND
A8 1088
E 13
ECM Connector
E
12
PEX
VC
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
05 −46

Page 4402 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 05−444
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
AVENSIS Supplement (RM 1045E)
DTC P 1386 INJECTOR FOR EXHAUST FUEL ADDITION
HINT:
S For more information on the exhaust fuel add

Page 4403 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A85355
Exhaust Fuel
Addition Injector
Injector Spray Supply PumpExhaust Gas
Temperature
Sensor (on up stream)
ECM Exhaust
Gas
Exhaust Gas Temperature
Sensor (on down stream)
Exhaust Fuel Addition Inje

Page 4404 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 05−446
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E) DTC No.
DTC Detection ConditionMain Trouble AreaRelated Trouble Area
SExcess or low fuel addition volu

Page 4405 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual − DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−447
AVENSIS Supplement (RM1045E)
MONITOR DESCRIPTION
HINT:
”Learning value” used in here represents a correction learning value of

− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−447
AVENSIS Supplement (RM1045E)
MONITOR DESCRIPTION
HINT:
”Learning value” used in here represents a correction learning value of the fuel addition volume to raise the
DPNR (*4) catalyst temperature to a target range.
*4: Diesel Particulate−NOx Reduction system.
In order to detect malfunction in the exhaust fuel addition injector, the ECM monitors: the air−fuel ratio, DPNR
catalytic temperature and learning value.
SWhen the exhaust fuel addition injector adds fuel during NOx reduction, the ECM monitors the air−fuel
ratio when the exhaust fuel addition injector adds fuel. If the air−fuel ratio is too RICH or too LEAN
against the ECM predetermined air−fuel ratio, the ECM judges the fuel addition volume small or large,
and illuminates the CHK ENG. In this malfunction, there is no fail−safe operation.
SThe ECM always monitors the DPNR catalytic converter temperature and the air−fuel ratio. When the
temperature reaches higher than its usual level or the air−fuel ratio becomes extremely RICH, the ECM
judges that the injector has stuck open and illuminates the CHK ENG. If this malfunction occurs, the
ECM enters the fail−safe mode to limits its acceptable vehicle speed to approximately10 km/h (6 mph)
at maximum by restraining the engine power.
SUnder DPNR catalyst regeneration, the ECM monitors the learning value. Normally, the learning value
for the DPNR catalyst regeneration is in the vicinity of1.0. Thus the learning value is at1.4 or more
for a certain period of time, the ECM judges the fuel addition volume from the injector insufficient and
illuminates the CHK ENG. If this malfunction occurs, the ECM enters the fail−safe mode to limit its ac-
ceptable vehicle speed to approximately 80 km/h (50 mph) at maximum by restraining the engine pow-
er.
Malfunction Condition by Fail−Safe Operation:
Fail−Safe OperationMalfunction ConditionMalfunction Detection ConditionDrive Pattern
No fail−safe operation
Low or excess fuel
addition volume from
the exhaust fuel addi-
tion injectorWhen the exhaust fuel addition injector adds fuel during NOx
reduction, if actual air−fuel ratio deviates from a value esti-
mated by the ECM when the exhaust fuel addition injector
adds fuel
After engine warm−up, per-
form DPNR REJU (PM) in
the ACTIVE TEST menu us-
ing the hand−held tester,
and drive at constant vehicle
speed within 50 to100 km/h
(31to 62 mph) for more than
15 minutes
Limits engine power by
permitting driving at ve-
hicle speed of approxi-
mately10 km/h (6 mph)
at maximum
Exhaust fuel addition
injector has stuck
openDPNR catalytic converter temperature reaches higher than
800_C(1,472_F) or air−fuel ratio is less than approximately
12 for a couple of secondsIdling engine for more than 5
minutes (*5)
Limits engine power by
permitting driving at ve-
hicle speed of approxi-
mately 80 km/h (50 mph)
at maximum
(HINT: DPNR catalyst re-
generation is prohibited)
Low fuel addition vol-
ume from the exhaust
fuel addition injectorUnder DPNR catalyst regeneration, when learning value of
1.4 or more continues for a certain period of time (*6)
After engine warm−up, per-
form DPNR REJU (PM) in
the ACTIVE TEST menu us-
ing the hand−held tester,
and drive at constant vehicle
speed within 50 to100 km/h
(31to 62 mph) for more than
30 minutes
*5: The DPNR catalytic converter temperature will not reach 800_C(1,472_F) or higher during idling even
if the exhaust fuel addition injector has stuck open.
*6: While the DPNR catalyst regeneration is exercised, the ECM raises the DPNR catalytic converter temper-
ature to more than approximately 600_C(1,112_F) by adding fuel using the exhaust fuel addition injector.
If the temperature does not reach that temperature regardless of the attempt, the correction learning value
of the fuel addition volume increments to raise the DPNR catalytic converter temperature to a target range.

Page 4406 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A91206
Malfunction Detection:
Abnormal
(Low Volume)ON
OFF
Time
DPNR
Catalyst
Regeneration
(Activation of Fuel Addition)
Normal
A/F Ratio
Learning ValueLean
Rich
Abnormal
(Excess Volume)
Abnormal
(Low

Page 4407 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual −
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
05 −449
AVENSIS Supplement (RM 1045E)
1 CHECK OTHER DTC OUTPUT(IN ADDITION TO P 1386)
(a) Connect the hand −held tester to the DLC3.

Page 4408 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 05−450
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
AVENSIS Supplement (RM 1045E)
B GO TO DTC P0544, P0545, P0546, P203 1, P2032
AND P2033 (RELATED TO EXHAUST GAS TEM-
PERATURE SEN

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