2005 TOYOTA AVENSIS sensor

05−328
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
AVENSIS Supplement (RM 1045E)
DTC P0093 FUEL SYSTEM LEAK DETECTED − LARGE
LEAK
HINT:
S If DTC P 1229 is detected, P0093 (fuel leaks in high −pressurized area) may be detected simultaneous-
ly. Because of the extremely high internal fuel pressure in the common rail opens the pressure limiter,
and the ECM may interpret this as a fault and set P0093.
S For more information on the common rail system, see page 05 −255.
S If P0093 is present, refer to the diagnostic trouble codes (DTCs) table for the fuel system on page
05 −255.
CIRCUIT DESCRIPTION
Refer to the description on page 05 −255.
DTC No.DTC Detection ConditionTrouble Area
P0093Fuel leaks in high −pressurized area
( 1 trip detection logic)
SFuel line between supply pump and common rail
S Fuel line between common rail and injector
S Supply pump
S Common rail
S Injector (P 1238 is set simultaneously)
S Pressure discharge valve
S Open or short in EDU circuit (P0200 is set simultaneously)
S Open or short in injector circuit (P0200 and P 1238 are set
simultaneously)
S EDU (P0200 is set simultaneously)
S ECM
HINT:
After confirming DTC P0093, check the internal fuel pressure of the common rail in the ”DIAGNOSIS / OBD/
MOBD / DATA LIST / ALL / COMN RAIL” using the hand −held tester.
Reference:
Engine SpeedFuel Pressure (MPa)
IdlingApproximately 30 to 40
2,500 rpm (No engine load)Approximately 50 to 100
MONITOR DESCRIPTION
P0093 (Fuel leaks in high −pressurized area):
This DTC stands for fuel leaks that are existing in high −pressurized area in the common rail system. The
ECM constantly monitors the internal fuel pressure of the common rail after the engine is started, and the
ECM then will set this DTC if the drop of the internal fuel pressure is large when injecting the fuel.
In the common rail system, high −pressurized fuel, approximately 30 to 180 MPa (306 to 1,835 kgf/cm
2, 4,35 1
to 26, 106 psi), is always applied to the high −pressurized area including the supply pump, common rail, injec-
tor and piping. The ECM adjusts the suction control valve control current (by applying duty ratio signal) to
obtain the target internal fuel pressure.
If this DTC is present, the ECM enters the fail −safe mode. The fail −safe mode suspends both fuel injection
and supply pump operation, and then stops the engine. Before stopping the engine, the ECM permits driving
the vehicle for 1minute. The fail −safe mode continues until the ignition switch is turned to OFF.
MONITOR STRATEGY
Required sensorsFuel pressure sensor
Frequency of operationContinuous
Duration1 second
CHK ENG operation1driving cycle
05CPF −05

−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
05 −329
AVENSIS Supplement (RM 1045E)
TYPICAL ENABLING CONDITIONS
ItemSpecificationItemMinimumMaximum
Engine speed600 rpm−
The monitor will not run if the fuel pressure sensor, suction control valve circuit, or pressure discharge valve is malfunctioning
TYPICAL MALFUNCTION THRESHOLDS
Threshold
Drop of the internal fuel pressure is large when injecting fuel
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand−held tester. Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, if the air −fuel ratio was lean or rich, and other data
from the time the malfunction occurred.
1 CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P0093)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand −held tester ON.
(c) Select the item ”DIAGNOSIS / OBD/MOBD / DTC INFO / CURRENT CODES”.
(d) Read DTCs. Result:
Display (DTC output )Proceed to
P0093A
P0093 and P 1238B
P0093 and P0200 and/or P 127 1C
HINT:
If any other codes besides P0093 are output, perform troubleshooting for those DTCs first.
B Go to step 3
C GO TO RELEVANT DTC CHART(See page 05 −299)
A
2 CHECK FUEL LEAKAGE(IN HIGH −PRESSURIZED FUEL PARTS AND AREA)
(a) Visually check the supply pump, injector and fuel line located between the supply pump and common
rail for fuel leaks or fuel pressure leaks. Also, perform the same on the fuel line between the common
rail and the injector (see page 11− 67, 11− 46).
HINT:
There is possibility that fuel leaks inside the components (supply pump, etc) have been occurred.
NG REPAIR OR REPLACE
OK

05−322
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
MONITOR STRATEGY
P0088:
Required sensorsFuel pressure sensor
Frequency of operationContinuous
Duration1second
CHK ENG operation1driving cycle
P1229:
Required sensorsFuel pressure sensor
Frequency of operationContinuous
Duration1minute
CHK ENG operation1driving cycle
TYPICAL ENABLING CONDITIONS
P0088:
Specification
The monitor will not run if the fuel pressure sensor, or suction control valve circuit, or pressure discharge valve is malfunctioning
P1229:
ItemSpecification
Target fuel pressure variationSmall
The monitor will not run if the fuel pressure sensor, or suction control valve circuit, or pressure discharge valve is malfunctioning
TYPICAL MALFUNCTION THRESHOLDS
P0088:
Detection CriteriaThreshold
Fuel pressure sensor200 MPa (2,039 kgf/cm2, 29,007 psi) or more
P1229:
ItemThreshold
The internal fuel pressure of the common rail with the suction control valve
closedStays at higher than targeted fuel pressure
Behavior of the pressure discharge valveFrequently operates

05−314
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
AVENSIS Supplement (RM 1045E)
DTC P0087 FUEL RAIL/SYSTEM PRESSURE − TO O
LOW
DTC P0 190 FUEL RAIL PRESSURE SENSOR CIRCUIT
DTC P0 192 FUEL RAIL PRESSURE SENSOR CIRCUIT
LOW INPUT
DTC P0 193 FUEL RAIL PRESSURE SENSOR CIRCUIT
HIGH INPUT
HINT:
S For more information on the fuel pressure sensor and the common rail system, see page 05 −255.
SIf P0087, P0 190, P0 192 and/or P0 193 is present, refer to the diagnostic trouble codes (DTCs) table
for fuel system on page 05 −255.
05CPD −05

A91222
Fuel Pressure (MPa)
Output Voltage (V)
0.55
0
190 3.894.44
PR2 (Sub) PR (Main)
E2SPR2 VC
PR
E2
VCS Main
Sub
4.90
Detect P0193
Detect P0192
0.85 1.40 Property of Output Voltage:Internal Structure of the Pressure Sensor
(Duplicates System):
5.00
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−315
AVENSIS Supplement (RM1045E)
CIRCUIT DESCRIPTION
The ECM monitors internal fuel pressure of the common rail using the fuel pressure sensor and controls the
suction control valve to regulate the internal fuel pressure to the target pressure, approximately 30 to180
MPa (306 to1,835 kgf/cm
2, 4,351to 26,106 psi).
The pressure sensor is a semiconductor pressure sensor that varies electric resistance when applying pres-
sure to its silicon. This sensor output voltage changes in proportion to the internal fuel pressure. The sensor
has been designed as a duplicate circuit, and its main (PR) circuit is used under normal condition. Even if
either of the sensor circuit is failed, the other normal circuit will be used to monitor the internal fuel pressure.
DTC No.DTC Detection ConditionTrouble Area
P0087Fuel pressure sensor output voltage stays at fixed value
(1trip detection logic)
P0190
Fuel pressure sensor output voltage is 0.55 V or less, or 4.9 V
or more for 0.5 second
(1trip detection logic)
SOpen or short infuelpressure sensor circuit
P0192
Fuel pressure sensor output voltage is 0.55 V or less for 0.5
second
(1trip detection logic)
SOpenorshortinfuelpressuresensorcircuit
SFuel pressure sensor
SECM
P0193
Fuel pressure sensor output voltage is 4.9 V or more for 0.5
second
(1trip detection logic)

A82882
Fuel Pressure
Engine Speed
Normal
Abnormal P0087 Malfunction Detection: 05−316
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
HINT:
After confirming DTC P0087, P0190, P0192 and P0193, check the internal fuel pressure of the common rail
in ”DIAGNOSIS / OBD/MOBD / DATA LIST / ALL / COMN RAIL” using the hand−held tester.
Reference:
Engine SpeedFuel Pressure (MPa)
IdlingApproximately 30 to 40
Running the engine at 2,500 rpm (No engine load)Approximately 50 to100
MONITOR DESCRIPTION
P0087 (Fuel pressure sensor output stays at fixed value):
Under normal condition, an internal fuel pressure of the common rail usually fluctuates1to 2 MPa (10to
20 kgf/cm
2,145 to 290 psi) even if the driving condition is constant. The internal fuel pressure is approximate-
ly 30 to 40 MPa (306 to 408 kgf/cm
2, 4,351to 5,801psi) at idling, and it increases to approximately 50 to
100 MPa (510to1,020 kgf/cm
2, 7,251to14,503 psi) when running the engine at 2,500 rpm. This DTC is
set if there is no fluctuation in the internal fuel pressure.
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.
P0190, P0192 and P0193 (Open or short in fuel pressure sensor circuit):
These DTCs are set if the fuel pressure sensor output voltage is out of the standard range. The DTCs stand
for open or short malfunction of the sensor circuit.
If these DTCs are 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.

− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−317
AVENSIS Supplement (RM1045E)
MONITOR STRATEGY
P0087:
Required sensorsFuel pressure sensor
Frequency of operationContinuous
Duration1second
CHK ENG operation1driving cycle
P0190:
Required sensorsFuel pressure sensor
Frequency of operationContinuous
Duration0.5 second
CHK ENG operation1driving cycle
P0192:
Required sensorsFuel pressure sensor
Frequency of operationContinuous
Duration0.5 second
CHK ENG operation1driving cycle
P0193:
Required sensorsFuel pressure sensor
Frequency of operationContinuous
Duration0.5 second
CHK ENG operation1driving cycle
TYPICAL ENABLING CONDITIONS
P0087:
ItemSpecificationItemMinimumMaximum
Engine speed500 rpm−
Battery voltage8V−
Fuel volume5mm3−
The monitor will not run if the fuel pressure sensor circuit (P0190, P0192 and P0193) is malfunctioning
TYPICAL MALFUNCTION THRESHOLDS
P0087:
Detection CriteriaThreshold
Changing value of fuel pressureVirtually no fluctuation
P0190:
Detection CriteriaThreshold
Fuel pressure sensor output voltageLess than 0.55 V or more than 4.9 V
P0192:
Detection CriteriaThreshold
Fuel pressure sensor output voltageLess than 0.55 V
P0193:
Detection CriteriaThreshold
Fuel pressure sensor output voltageMore than 4.9 V

A80998
F16
Fuel Pressure Sensor
5
P
PCR1 ECM
E13 26 5
EB1
2
P−B
PCR2
E13 33 2
EB1
1
R−W
VCS
E12 2 1
EB1
6
R−W
VC
E13 18 6
EB1
3
BR
E2S
E12 1 3
EB1
4
BR
E2
E13 28 4
EB1 PR
PR2P
P−B
R−W
R−W
BR
BR VC
E2S VCS
E2
05−318
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
SAfter completing repairs, check that P0087 is not present again.
SIf different DTCs related to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may have an open circuit.
SRead freeze frame data using the hand−held tester. Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the
vehicle was running or stopped, if the engine was warmed up or not, if the air−fuel ratio was lean or
rich, and other data from the time the malfunction occurred.
1READ VALUE OF HAND−HELD TESTER(FUEL PRESSURE)
(a) Connect the hand−held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand−held tester ON.
(c) Start the engine.
(d) Select the item ”DIAGNOSIS / OBD/MOBD / DATA LIST / ALL / COMN RAIL”.
(e) Check that internal fuel pressure of the common rail is within the specification below.
Reference:
Engine SpeedFuel Pressure (MPa)
IdlingApproximately 30 to 40
2,500 rpm (No engine load)Approximately 50 to100
NG Go to step 3
OK