2005 TOYOTA AVENSIS fuel pressure

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DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −1 01
AVENSIS Supplement (RM 1045E)
DTC P0 134 OXYGEN SENSOR CIRCUIT NO ACTIVITY
DETECTED (BANK 1 SENSOR 1)
DTC P0 154 OXYGEN SENSOR CIRCUIT NO ACTIVITY
DETECTED (BANK 2 SENSOR 1)
CIRCUIT DESCRIPTION
Refer to DTC P0 130 on page 05 −82.
DTC No.DTC Detection ConditionTrouble Area
P0 134
P0 154
After engine is warmed up, heated oxygen sensor (sensor 1)
output does not indicate RICH (greater than 0.45 V) even once
when conditions (a), (b), (c), (d) and (e) continue for at least 65
seconds ( 1 trip detection logic):
(a) Engine speed: 1,400 rpm or more
(b) Vehicle speed: 130 km/h (8 1 mph)
(c) Throttle valve is not fully closed
(d) 180 seconds or more after starting engine
(e) Engine coolant temperature is more than 40 _ C( 104 _ F)
S Open or short in heated oxygen sensor circuit
S Heated oxygen sensor (Bank 1, 2 Sensor 1)
S Heated oxygen sensor heater (Bank 1, 2 Sensor 1)
S EFI relay
S Air induction system
S Fuel pressure
S PCV hose connection
S PCV valve and hose
S Injector
S Gas leakage in exhaust system
S ECM
HINT:
S After confirming DTCs P0134 and P0154, confirm the output voltage of the heated oxygen sensor (bank
1, 2 sensor 1) in the DIAGNOSIS / OBD/MOBD / DATA LIST / ALL using the hand−held tester If the
output voltage of the heated oxygen sensor is less than 0.1 V, the heated oxygen sensor circuit may
be open or short.
S Bank 1 refers to the No. 1 and No. 4 cylinders.
SBank 2 refers to the No. 2 and No. 3 cylinders.
SSensor 1refers to the sensor closest to the engine assembly.
WIRING DIAGRAM
Refer to DTC P0 130 on page 05 −82.
05CKB −02

+25 %
−12.5 %
More than 0.5 V
Less than 0.4V
Case1
Case 2
Case 3
Case 4
Output voltage of heated oxygen
sensor (sensor1: front sensor)
Injection volume
Output voltage
Output voltage of heated oxygen
sensor (sensor 2: rear sensor)Main suspect
trouble area
OK
+25 %
−12.5 %
More than 0.5 V
Less than 0.4V
Injection volume
Output voltage
+25 %
−12.5 %
More than 0.5 V
Less than 0.4V
Injection volume
Output voltage
Sensor1: front sensor
(sensor1, heater, sensor1
circuit)+25 %
−12.5 %
More than 0.5 V
Less than 0.4V
Injection volume
Output voltage
+25 %
−12.5 %
Injection volume
Output voltage
NG
+25 %
−12.5 %
Injection volume
Output voltage
NG
+25 %
−12.5 %
Injection volume
Output voltage
NG
+25 %
−12.5 %
Injection volume
Output voltage
NGExtremely rich or lean actual
air−fuel ratio
(Injector, fuel pressure, gas
leakage in exhaust system,
etc.) OK
OK
OK
Almost no reaction


Sensor 2: rear sensor
(sensor 2, heater, sensor 2
circuit)
Almost no reaction Almost no reactionAlmost no reaction
05−102
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
INSPECTION PROCEDURE
HINT:
Hand−held tester only:
It is possible the malfunctioning area can be found using the ACTIVE TEST A/F CONTROL operation. The
A/F CONTROL operation can determine if the A/F sensor, heated oxygen sensor or other potential trouble
areas are malfunctioning or not.
(a) Perform the ACTIVE TEST A/F CONTROL operation.
HINT:
The A/F CONTROL operation lowers the injection volume12.5% or increases the injection volume 25%.
(1) Connect the hand−held tester to the DLC3 on the vehicle.
(2) Turn the ignition switch to ON.
(3) Warm up the engine by running the engine at 2,500 rpm for approximately 3 minutes.
(4) Select the item: DIAGNOSIS / OBD/MOBD / ACTIVE TEST / A/F CONTROL.
(5) Perform the A/F CONTROL operation with the engine in an idle condition (press the right or left
button).
Result:
Heated oxygen sensor reacts in accordance with increase and decrease of injection volume:
+25 %
rich output: More than 0.5 V
−12.5 %
lean output: Less than 0.4 V
NOTICE:
There is a delay of few seconds in the sensor1(front sensor) output, and there is about 20 seconds
delay at maximum in the sensor 2 (rear sensor).

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DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −1 07
AVENSIS Supplement (RM 1045E)
10 CHECK WHETHER MISFIRE IS OCCURRED OR NOT BY MONITORING DTC AND
DATA LIST
NG PERFORM TROUBLESHOOTING FOR MISFIRE
(See page 05 −1 46)
OK
11 CHECK AIR INDUCTION SYSTEM
(a) Check for vacuum leaks in the air induction system.
NG REPAIR OR REPLACE AIR INDUCTION SYSTEM
OK
1 2 CHECK FUEL PRESSURE(LOW PRESSURE) (See page 11− 4)
NG CHECK AND REPLACE FUEL PUMP,
PRESSURE REGULATOR, FUEL PIPE LINE AND
FILTER
OK
1 3 CHECK FUEL PRESSURE(HIGH PRESSURE) (See page 11− 4)
NG CHECK AND REPLACE FUEL PUMP, FUEL
PRESSURE SENSOR, WIRING AND FUEL
LEAKAGE
OK
1 4 CHECK FOR EXHAUST GAS LEAKS
NG REPAIR OR REPLACE EXHAUST GAS
LEAKAGE POINT (See Page 15− 2)
OK
1 5 CONFIRM IF ANY MISFIRING DTCS WERE PRESENT AT STEP 1
(a) Misfiring DTC P0301, P0302, P0303 and/or P0304 was present at step 1.
NO REPLACE HEATED OXYGEN SENSOR
YES

A81481
EDU Wiring Diagram:COM3
COM1 COM2
Pressure
Discharge
Valve
Injector
INJ#1
INJ#4INJ#2INJ#3
PRV
GND
EDU Connector
Control
Circuit
DC/DC
Converter
From Battery
IJT#1
IJT#4
IJT#2 IJT#3 PRD
INF
ECM
Maximum 150 V
Confirmation
Pulse Command
Pulse
Warning: Terminal J, I, H, K, L, M, N and S are high voltage
E4
E5
Maximum 150 V
EDU
05
−368
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DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
DTC P0200 INJECTOR CIRCUIT / OPEN
HINT:
S For more information on the EDU, see page 05 −255.
S If P0200 is present, refer to the diagnostic trouble codes (DTCs) table for the fuel system on page
05 −255.
CIRCUIT DESCRIPTION
The EDU has been adopted to drive the injector at high speeds. The EDU has realized the high −speed driv-
ing under high −pressurized fuel conditions using the DC/DC converter that provides a high −voltage, and the
quick −charging system.
Soon after the EDU receives an injection command (IJT) signal from the ECM, the EDU responds to the com-
mand with injector injection confirmation (IJF) signal when the current is applied to the injector.
05DVZ −02

A81511
5V/
Division
20 msec./Division INJFSignal Waveform
05−372
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
(b) Reference: Inspection using the oscilloscope.
During idling, the correct waveform is as shown in the dia-
gram on the left.
Inspection PointsSpecified Condition
C and DCorrect waveform is as shown
INSPECTION PROCEDURE
HINT:
SIf P0200 and P1271 are present simultaneously, there is open in the INJF wire harness between the
EDU and ECM, or there is open in the wire harness for both injector and pressure discharge valve.
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.
1CHECK OTHER DTC OUTPUT(IN ADDTION TO DTC P0200)
(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
P0200 and P1238A
P0200B
B Go to step 3
A
2 READ VALUE OF HAND−HELD TESTER(COMPENSATION OF INJECTION
VOLUME BETWEEN CYLINDERS)
(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 / INJ VOLUME FB” and read its value
displayed on the hand−held tester.
Result:
ResultCompensatory Injection Volume (mm3)
Standard−3to3
Maximum−4.9 to 4.9
(e) Inspect and repair the cylinder that has an improper compensation value according to the following
steps.
GO

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DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
05 −367
AVENSIS Supplement (RM 1045E)
DTC P0 191 FUEL RAIL PRESSURE SENSOR CIRCUIT
RANGE/PERFORMANCE
CIRCUIT DESCRIPTION
Refer to DTC P0087 on page 05 −314.
INSPECTION PROCEDURE
HINT:
S If DTCs P0087, P0 190, P0 192, and P0 193 are output simultaneously, the manifold absolute pressure
sensor circuit may be open or short. Perform troubleshooting for those DTCs first.
S 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.
DTC No.DTC Detection ConditionTrouble Area
P0 191
Voltage output of the fuel pressure sensor for the common rail
is out of the standard range
(1 trip detection logic)
S Fuel pressure sensor
1 CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P0 191)
(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
P0191A
P0 191 and other DTCsB
HINT:
If any other codes besides P0 191 are output, perform troubleshoot for those DTCs first.
B GO TO RELEVANT DTC CHART(See page 05 −299)
A
REPLACE COMMON RAIL ASSY (FUEL PRESSURE SENSOR) (See page 11− 67)
05CPQ −03

05−346
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DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
AVENSIS Supplement (RM 1045E)
DTC P0 106 MANIFOLD ABSOLUTE PRESSURE/
BAROMETRIC PRESSURE CIRCUIT RANGE/
PERFORMANCE PROBLEM
CIRCUIT DESCRIPTION
Refer to DTC P0 105 on page 05 −342.
DTC No.DTC Detection ConditionTrouble Area
P0 106
Voltage output of the manifold absolute pressure sensor is out
of the standard range
(2 trip detection logic)
S Manifold absolute pressure sensor
INSPECTION PROCEDURE
HINT:
S If DTCs P0 105, P0 107, and P0 108 are output simultaneously, the manifold absolute pressure sensor
circuit may be open or short. Perform troubleshooting for those DTCs first.
S 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 P0 106)
(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
P0106A
P0 106 and other DTCsB
HINT:
If any other codes besides P0 106 are output, perform troubleshooting for those DTCs first.
B GO TO RELEVANT DTC CHART(See page 05 −299)
A
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR
05CPK −05

05−328
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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