change time TOYOTA AVENSIS 2005 Service Owner's Manual

A59674
F16
VCC (+)
GND (±)
Fuel Pressure Sensor Connector Wire Harness Side
VOUT
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±407
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
HINT:

If different DTCs related to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may be open.

Read freeze frame data using the hand±held tester. Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle
was running or stopped, the engine was warmed up or not, the air±fuel ratio was lean or rich, etc. at
the time of the malfunction.
1 READ VALUE OF HAND±HELD TESTER(FUEL PRESSURE)
(a) Connect the hand±held tester to the DLC3.
(b) Start the engine.
(c) Push the hand±held tester main switch ON.
(d) Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / FUEL PRESSº and read its value dis-
played on the hand±held tester.
Pressure: 8 to 13 MPa (81.6 to 132.6 kgf/cm
2, 1,160 to 1,885 psi)
Result:
Fuel Pressure (MPa)Proceed to
19.6 or moreA
0.0B
OK (8 to 13 MPa (81.6 to 132.6 kgf/cm2, 1,160 to 1,885 psi)) (*1)C
*1: The value must be changed when the engine is run or stopped.
B Go to step 3
C CHECK FOR INTERMITTENT PROBLEMS
A
2 INSPECT FUEL PRESSURE SENSOR(VCC VOLTAGE)
(a) Turn the ignition switch ON.
(b) Measure the voltage between the specified terminals of
the F16 fuel pressure sensor connector.
Standard:
Symbols (Terminal No.)Specified condition
VCC (F16±1) ± GND (F16±3)4.5 to 5.5 V
NG Go to step 4
OK

05±394
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0171 SYSTEM TOO LEAN (BANK 1)
DTC P0172 SYSTEM TOO RICH (BANK 1)
DTC P0174 SYSTEM TOO LEAN (BANK 2)
DTC P0175 SYSTEM TOO RICH (BANK 2)
CIRCUIT DESCRIPTION
The fuel trim is related to the feedback compensation value, not to the basic injection time. The fuel trim in-
cludes the short±term fuel trim and the long±term fuel trim.
The short±term fuel trim is the short±term fuel compensation used to maintain the air±fuel ratio at stoichio-
metric air±fuel ratio. The signal from the heated oxygen sensor indicates whether the air±fuel ratio is RICH
or LEAN compared to the stoichiometric air±fuel ratio. This variance triggers a reduction in the fuel volume
if the air±fuel ratio is RICH, and an increase in the fuel volume if it is LEAN.
The long±term fuel trim is the overall fuel compensation carried out in long±term to compensate for a continu-
al deviation of the short±term fuel trim from the central value, due to individual engine differences, wear over-
time and changes in the operating environment.
If both the short±term fuel trim and the long±term fuel trim are LEAN or RICH beyond a certain value, it is
detected as a malfunction and the CHK ENG is illuminated.
DTC No.DTC Detection ConditionTrouble Area
P0171
P0174When air±fuel ratio feedback is stable after warming up engine,
fuel trim is considerably in error on LEAN side
(2 trip detection logic)

Air induction system

Injector blockage

Mass air flow meter

Manifold absolute pressure sensor

Engine coolant temperature sensor

Fuel pressure

Gas leakage in exhaust system

Open or short in heated oxygen sensor (bank 1, 2 sensor 1)
circuit

Heated oxygen sensor (bank 1, 2 sensor 1)

Heated oxygen sensor heater (bank 1, 2 sensor 1)

EFI relay

PCV valve and hose

PCV hose connection

ECM
P0172
P0175When air±fuel ratio feedback is stable after warming up engine,
fuel trim is considerably in error on RICH side
(2 trip detection logic)

Injector leakage blockage

Mass air flow meter

Manifold absolute pressure sensor

Engine coolant temperature sensor

Ignition system

Fuel pressure

Gas leakage in exhaust system

Open or short in heated oxygen sensor (bank 1, 2 sensor 1)
circuit

Heated oxygen sensor (bank 1, 2 sensor 1)

ECM
HINT:

When DTC ºP0171 or P0174º is recorded, the actual air±fuel ratio is on the LEAN side. When DTC
ºP0172 or P0175º is recorded, the actual air±fuel ratio is on the RICH side.

If the vehicle runs out of fuel, the air±fuel ratio is LEAN and DTC ºP0171 or P0174º is recorded. The
CHK ENG then comes on.
05CKD±01

A00798
Atmosphere
Housing
Platinum Electrode
Solid Electrolyte
(Zirconia Element)
Platinum Electrode
Heater
Coating (Ceramic)
Exhaust Gas CoverIdeal Air±Fuel Mixture
Output Voltage
Richer ± Air Fuel Ratio ± Leaner
05±364
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
CIRCUIT DESCRIPTION
To obtain a high purification rate for the CO, HC and NOx components of the exhaust gas, a three±way cata-
lytic converter is used. For the most efficient use of the three±way catalytic converter, the air±fuel ratio must
be precisely controlled so that it is always close to the stoichiometric air±fuel ratio.
The heated oxygen sensor has the characteristic whereby its output voltage changes suddenly in the vicinity
of the stoichiometric air±fuel ratio. This is used to detect the oxygen concentration in the exhaust gas and
provide the ECM with feedback control the air±fuel ratio.
When the air±fuel ratio becomes LEAN, the oxygen concentration in the exhaust gas increases. And the
heated oxygen sensor informs the ECM of the LEAN condition (low voltage, i.e. less than 0.45 V).
When the air±fuel ratio is RICHER than the stoichiometric air±fuel ratio, the oxygen will be vanished from
the exhaust gas. And the heated oxygen sensor informs the ECM of the RICH condition (high voltage, i.e.
more than 0.45 V). The ECM judges by the voltage output from the heated oxygen sensor whether the air±
fuel ratio is RICH or LEAN and controls the injection time accordingly. If the malfunction of the heated oxygen
sensor causes an output of abnormal voltage, the ECM becomes unable to perform accurate air±fuel ratio
control.
The heated oxygen sensors include a heater which heats the zirconia element. The heater is controlled by
the ECM. When the intake air volume is low (the temperature of the exhaust gas is low), current flows to the
heater in order to heat the sensor for the accurate oxygen concentration detection.
DTC No.DTC Detection ConditionTrouble Area
P0130
P0150Output voltage of heated oxygen sensor (sensor 1) remains at
0.4 V or more, or 0.55 V or less, during idling after engine is
warmed up (2 trip detection logic)
Open or short in heated oxygen sensor (bank 1, 2 sensor 1)
circuit

Heated oxygen sensor (bank 1, 2 sensor 1)
P2195
P2197Output voltage of heated oxygen sensor (sensor 1) remains at
0.55 V or less, during idling after engine is warmed up (2 trip
detection logic)
Heated oxygen sensor (bank 1, 2 sensor 1)

Heated oxygen sensor heater (bank 1, 2 sensor 1)

EFI relay

Air induction system
P2196
P2198Output voltage of heated oxygen sensor (sensor 1) remains at
0.4 V or more, during idling after engine is warmed up (2 trip
detection logic)
y

Fuel pressure

Injector

ECM
HINT:

Bank 1 refers to the No. 1 and No. 4 cylinders.

Bank 2 refers to the No. 2 and No. 3 cylinders.

Sensor 1 refers to the sensor closest to the engine assembly.

The output voltage of the heated oxygen sensor and the short±term fuel trim value can be read using
the hand±held tester.

±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
05±597
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0116ENGINE COOLANT TEMPERATURE CIRCUIT
RANGE/PERFORMANCE PROBLEM
CIRCUIT DESCRIPTION
Refer to DTC P0115 on page 05±593.
DTC No.DTC Detection ConditionTrouble Area
P0116
When THW greater than ±40 \fC (±40 \fF) and less than 60 \fC
(140 \fF), and THA greater than ±6.7 \fC (20 \fF), and when start-
ing engine, conditions (a) and (b) continue (2 trip detection
logic):
(a)Vehicle speed is changing (Not stable)
(b)THW change is lower than 3 \fC (5.4 \fF) after engine was
started.

Cooling system

Engine coolant temperature sensor

Thermostat
In case that reading value of engine coolant temp. sensor will
not change more than 1 \fC (1.8 \fF) even after repeating 6 trips
(detection logic) of adjusting speed pattern with THW more
than 90 \fC (194 \fF) after engine was started.
INSPECTION PROCEDURE
HINT:

If DTCs ºP0115, P0116, P0117and P0118º are output simultaneously, engine coolant temperature
sensor circuit may be open or short. Perform the troubleshooting of DTC ºP0\
115, P0117 or P0118º first.

Read freeze frame data using \b
 . 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.
1CHECK OTHER DTC OUTPUT(BESIDES DTC P0116)
(a)Read the DTC using the hand±held tester. Result:
Display (DTC output)Proceed to
Only P0116 are outputA
P0116 and other DTCs are outputB
HINT:
If any other codes besides ºP0116º are output, perform the troubleshooting for those DTCs first.
BGO TO RELEVANT DTC CHART(See page 05±544)
A
2INSPECT THERMOSTAT (See page 16±39)
NGREPLACE THERMOSTAT (See page 16±50)
OK
REPLACE ENGINE COOLANT TEMPERATURE SENSOR
05CPN±01

A76970
L±Y
3
4
A6
Mass Air Flow Meter
ECM
5 G
+B VG
E2G
From
EFI MAIN Relay B±W
VG
E12
EVG
24
32
E12
05±578
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using \b
 . Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, it is useful for determi\
ning whether the vehicle was running
or stopped, the engine was warmed up or not, etc. at the time of the malfu\
nction.
1READ VALUE OF HAND±HELD TESTER(MASS AIR FLOW RATE)
(a)Connect the hand±held tester to the DLC3.
(b)Start the engine.
(c)Push the hand±held tester main switch ON.
(d)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / MAFº and read its value displayed on the hand±held tester.
Result:
Air flow rate (gm/s)Proceed to
0.0A
174.0 or moreB
1  Mass Air Flow Rate 173.0 or more (*1)C
*1: The value must be changed when the throttle valve is opened or closed.
BGo to step 6
CCHECK FOR INTERMITTENT PROBLEMS (See page 05±528)
A

A81006
ECM
E3
EGR Valve Assy
G
EG+A 6
E12
Y±G
R±L
G±BE12
E12
E125
4
3EG±A
EG+B
EG±B 6
4
3
1From EFI MAIN Relay
5
2B±W
B±W
B±W
± DIAGNOSTICSECD SYSTEM (1CD±FTV)
05±629
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0400 EXHAUST GAS RECIRCULATION FLOW
DTC P0403 EXHAUST GAS RECIRCULATION CONTROL
CIRCUIT
CIRCUIT DESCRIPTION
DTC No.DTC Detection ConditionTrouble Area
P0400Mass air flow rate is not changed when turning on EGR valve
EGR valve assy

Open or short in EGR circuit
P0403EGR valve assy motor malfunction

Oen or short in EGR circuit

EGR passage

ECM
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using    
 Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running
or stopped, the engine was warmed up or not, etc. at the time of the malfunction.
05CPU±01

± DIAGNOSTICSECD SYSTEM (1CD±FTV)
05±623
AVENSIS REPAIR MANUAL (RM1018E)DTC No.
DTC Detection ConditionTrouble Area
P0380
When the glow plug is turned from ON to OFF, or vice±versa,
conditions (a) and (b) are satisfied:
(a) Battery voltage dos not change
(b) Duty signal from terminal M of the generator does not
change
Open or short in glow plug circuit

Glow fuse

Glow relay

Glow plug

ECM
MONITOR DESCRIPTION
When starting a cold engine, the ECM supplies the current to the glow plug for a certain period of time. As
the supplying current to the glow plug is terminated, the large current is suddenly cut off, therefore the battery
voltage then varies and also terminal M output (duty ratio) of the generator varies. If these variations are not
occurred when the glow plug is turned from ON to OFF, or vice±versa, the ECM realizes that the current has
not been supplied to the glow plug, and interprets this as open malfunction of the glow plug or glow plug
circuit.
MONITOR STRATEGY
Required sensorsGlow plug circuit
Frequency of operationTwice per driving cycle
Duration3 min.
CHK ENG operation2 driving cycles
TYPICAL ENABLING CONDITIONS
ItemSpecificationItemMinimumMaximum
Battery voltage11 V±
Engine speed700 rpm2,000 rpm
Engine coolant temperature±40C (104F)
Engine speed is stable±
Time after engine start8 sec.±
Any switches that vary electrical load
have not been being operated±
The monitor will not run if the generator circuit is malfunctioning
TYPICAL MALFUNCTION THRESHOLDS
Threshold
When the battery voltage, or terminal M output (duty ratio) of the generator does not change, despite turning the glow plug from ON to OFF, or
vice±versa

A81512
G and NE Signal Waveforms5 V/
Division
G 20 msec./Division (Idling)
NE
A64984
Camshaft Position Sensor
05±620
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0340CAMSHAFT POSITION SENSOR ºAº CIRCUIT (BANK 1 OR SINGLE SENSOR)
CIRCUIT DESCRIPTION
Camshaft position sensor (G signal) consists of a magnet, iron core and pickup\
coil.
The G signal plate has one tooth on its outer circumference and is installe\
d on the camshaft timing pulley.
When the camshafts rotate, the protrusion on the signal plate and the air ga\
p on the pickup coil change,
causing fluctuations in the magnetic field and generating an electromoti\
ve force in the pickup coil.
The NE signal plate has 34 teeth and is mounted on the crankshaft timing pu\
lley. The NE signal sensor gen-
erates 34 signals at every engine revolution. The ECM detects the standard crankshaft angl\
e based on the
G signal and the actual crankshaft angle and the engine speed by the NE s\
ignal.
DTC No.DTC Detection ConditionTrouble Area
P0340

No camshaft position sensor signal to ECM during cranking
(2 trip detection logic)
Open or short in camshaft position sensor circuit

Camshaft position sensor
P0340(g)

No camshaft position sensor signal to ECM with engine
speed 650 rpm or more (1 trip detection logic)
Camshaft timing pulley

ECM
Reference: Inspection using the oscilloscope.
The correct waveform is as shown in the diagram on the left.
Symbols (Terminal No.)Specified condition
G1 (E12±23) ± G± (E12±31)Correct waveform is as shown
WIRING DIAGRAM
Refer to DTC P0335 on page 05±616.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using \b
 . Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, it is useful for determi\
ning whether the vehicle was running
or stopped, the engine was warmed up or not, etc. at the time of the malfu\
nction.
1INSPECT CAMSHAFT POSITION SENSOR
(a)Measure the resistance between terminals 1 and 2. Resistance:
1,630 to 2,740
at cold
2,065 to 3,225
at hot
NOTICE:
ºColdº and ºHotº shown above mean the temperature of
the coils themselves. ºColdº is from ±10 C (14 F) to 50 C
(122 F) and ºHotº is from 50 C (122 F) to 100 C (212 F).
NGREPLACE CAMSHAFT POSITION SENSOR (See page 10±63)
OK
05B5J±03

±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
05±613
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using \b
 . Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, it is useful for determi\
ning whether the vehicle was running
or stopped, the engine was warmed up or not, etc. at the time of the malfu\
nction.
1CHECK OTHER DTC OUTPUT(BESIDES DTC P0234, P0299 AND/OR P1251)
(a)Read the DTC using the hand±held tester. Result:
Display (DTC output)Proceed to
ºP0234, P0299 and/or P1251º are outputA
ºP0234, P0299 and/or P1251 and other DTCs are outputB
BGO TO RELEVANT DTC CHART (See page 05±544)
A
2 CHECK CONNECTION OF VACUUM HOSE
NG REPAIR OR REPLACE VACUUM HOSE
OK
3 CHECK VACUUM HOSE(CHECK VACUUM BETWEEN TURBOCHARGER ± VRV FOR INTAKE PRESURE CHANGE AT 900 RPM)
(a) Using a 3±way connector, connect a vacuum gauge to the hose between the E±VRV and turbocharger.
(b) Warm up the engine to above 80 \fC (176 \fF).
(c) Check the vacuum at 900 rpm.
Result:
Proceed toVacuum
A0 kPa (0 mmHg, 0 in.Hg) to 50 kPa (375 mmHg, 14.8 in.Hg)
BAbove 50 kPa (375 mmHg, 14.8 in.Hg)
B Go to step 8
A

05±758
± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
2. DATA LIST
HINT:
According to the DATA LIST displayed on the Hand±held tester, you can read the value and status of the
switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as a first step of trouble-
shooting is one of the methods to shorten the labor time.
(a) Connect the Hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) From the display on the tester, read the ºDATA LISTº.
ItemMeasurement Item /
Range (Display)Normal ConditionDiagnostic Note
ABS MOT RELAYABS motor relay / ON or
OFFON : Motor relay ON±
SOL RELAYSolenoid relay / ON or
OFFON : Solenoid relay ON±
VSC / TRC OFF SWVSC / TRC OFF switch /
ON or OFFON : Switch ON
OFF : Switch OFF±
STOP LIGHT SWStop light switch / ON or
OFF
ON : Brake pedal de-
pressed
OFF : Brake pedal re-
leased
±
PKB SWParking brake switch / ON
or OFFON : Parking brake applied
OFF : Parking brake re-
leased
±
WHEEL SPD FR
Wheel speed sensor (FR)
reading / min.: 0 km/h (0
MPH, max.: 326 km/h (202
MPH)
Actual wheel speedSpeed indicated on
speedometer
WHEEL SPD FL
Wheel speed sensor (FL)
reading / min.: 0 km/h (0
MPH, max.: 326 km/h (202
MPH)
Actual wheel speedSpeed indicated on
speedometer
WHEEL SPD RR
Wheel speed sensor (RR)
reading / min.: 0 km/h (0
MPH, max.: 326 km/h (202
MPH)
Actual wheel speedSpeed indicated on
speedometer
WHEEL SPD RL
Wheel speed sensor (RL)
reading / min.: 0 km/h (0
MPH, max.: 326 km/h (202
MPH)
Actual wheel speedSpeed indicated on
speedometer
DECELERAT SENS1
Lateral acceleration sensor
1 reading / min.: ±1.869 G,
max.: 1.869 GApproximately 0
0.1G at
still conditionReading changes when ve-
hicle is bounced
IG VOLTAGEECU power supply voltage
/ NORMAL or TOO LOWNORMAL : 9.8 V or over
TOO LOW : Below 9.8 V±
SFRRABS solenoid SFRR / ON
or OFFON : Operate±
SFRHABS solenoid SFRH / ON
or OFFON : Operate±
SFLRABS solenoid SFLR / ON
or OFFON : Operate±
SFLHABS solenoid SFLH / ON
or OFFON : Operate±
SRRR (SRR)ABS solenoid SRRR
(SRR) / ON or OFFON : Operate±
SRRH (SRH)ABS solenoid SRRH
(SRH) / ON or OFFON : Operate±