2005 TOYOTA AVENSIS Service Repair Manual

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Page 4417 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A81500
P1271Malfunction:
ECMCommand Signal (PRD)
EDU
Confirmation Signal (IJF)
Pressure Discharge Valve
Command Signal
Pressure Discharge Valve
Confirmation SignalPRD
IJFON
OFF
Normal
Abnormal
− DIA

A81500
P1271Malfunction:
ECMCommand Signal (PRD)
EDU
Confirmation Signal (IJF)
Pressure Discharge Valve
Command Signal
Pressure Discharge Valve
Confirmation SignalPRD
IJFON
OFF
Normal
Abnormal
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−437
AVENSIS Supplement (RM1045E)
MONITOR DESCRIPTION
P1271(Open or short in pressure discharge valve circuit):
This DTC will be set if there is no valve opening confirmation (IJF) signal from the EDU to the ECM, despite
the ECM commanding the pressure discharge valve to open with the EDU. This DTC refers to an open or
short malfunction of the pressure discharge valve circuit, therefore the malfunction that the valve is stuck
open or closed can be excluded.
The EDU monitors the current supplied to the pressure discharge valve and indicates that the current flows
into the valve. If the current exceeds the specified level, the EDU interprets this as the IJF signal is low.
If this DTC is present, the ECM enters the fail−safe mode and limits the engine power. The fail−safe mode
continues until the ignition switch is turned to OFF.
P1272 (Closed malfunction of the pressure discharge valve):
The pressure discharge valve will open and discharge the internal fuel pressure from the common rail to the
fuel tank when the ignition switch is turned to OFF. In this event, the ECM compares the actual dropping rate
of the internal fuel pressure and the simulated dropping rate. If the ECM judges the actual dropping rate is
smaller than the simulation, the ECM then judges that the valve has stuck closed and sets this DTC. This
DTC detection will be activated if the internal fuel pressure does not drop below the specified level after the
ignition switch has been turned to OFF.
If this DTC is present, the ECM enters the fail−safe mode and limits the engine power. The fail−safe mode
continues until the ignition switch is turned to OFF.
MONITOR STRATEGY
P1271:
Required sensorsEDU
Frequency of operationContinuous
Duration3 seconds
CHK ENG operation1 driving cycle

Page 4418 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 05−438
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
P1272:
Required sensorsFuel pressure sensor
Frequency of operationOnce per driving cycle
Duration1 sec

Page 4419 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A80999
EDU
1 R−L
PRDECM
E1332
1
EA1 PRDR−L
E54
W
PRVE58
B
COM3
E472 P3
Pressure Discharge Valve
W
B 2
EA1
(Shielded) (Shielded)
BR
BR
BR
EIJ12D
J12E
J13D J13E J/C
A81507
ECMEDU
PRD
Pressure
Discha

Page 4420 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A81513
5V/
Division
20 msec./Division PRDSignal Waveform
A84835
5V/
Division
20 msec./Division INJFSignal Waveform
05−440
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Suppleme

Page 4421 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A82883
Pressure Discharge Valve
Component Side:
P3
A81461
E4
Wire Harness Side: EDU Connector
COM3
Front View
A81462
E5
Wire Harness Side:
EDU Connector
PRV
Front View
A81694
P3
Wire Harness Side:Pres

Page 4422 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A81462
E5
Wire Harness Side:
EDU Connector
PRD
Front View
A81089ECM Connector E13
PRD
A56874
E4
Wire Harness Side:
EDU Connector
+B (+)
Front View
A80994
E5
Wire Harness Side:
EDU Connector
GND (−)

Page 4423 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A66060
E13
ECM Connector
PRD
E1
E12
A81513
5V/
Division
20 msec./Division
PRD
Signal Waveform
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
05 −443
AVENSIS Supplement (RM1045E)
6 INS

Page 4424 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A81504
Injector Cross Section Diagram:Piston
Solenoid Valve
Nozzle Needle
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
05 −43 1
AVENSIS Supplement (RM1045E)
DTC P 1238 INJECTOR MALF

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