2005 TOYOTA AVENSIS fuel

± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±13
AVENSIS REPAIR MANUAL (RM1018E)
*1: If no conditions are specifically stated for ºldlingº, it means the shift lever is in the N or P position, the A/C
switch is OFF and all accessory switches are OFF.
*2: A/T only
7. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand±held tester allows the relay, VSV, actuator and so on to oper-
ate without parts removal. Performing the ACTIVE TEST as a first step of troubleshooting is one of the meth-
od to shorten labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c) Connect the hand±held tester to the DLC3.
(d) Turn the ignition switch ON.
(e) Push the ºONº button of the hand±held tester.
(f) Select the item ºDIAGNOSIS / OBD/MOBD / ACTIVE TESTº.
(g) According to the display on tester, perform the ºACTIVE TESTº.
Hand±held Tester DisplayTest DetailsDiagnostic Note
INJ VOL
[Test Details]
Control the injection volume
Min.: ±12.5 %, Max.: 25 %
[Vehicle Condition]
Engine speed: 3,000 rpm or less
All injectors are tested at once.

Injection volume is gradually
changed between ±12.5 and
25%.
A/F CONTROL
[Test Details]
Control the injection volume
±12.5 or 25 % (Change the injection volume ±12.5 % or 25 %.)
[Vehicle Condition]
Engine speed: 3,000 rpm or less
The following procedure of A/F
CONTROL enables the technician
to check and graph voltage out-
puts of the heated oxygen sensor.
To display the graph indication, se-
lect O2S B1 S1 and press button
ºF4º after selecting ºACTIVE
TEST/A/F CONTROL/USER
DATAº.
ISC DUTY RATIO
[Test Details]
Control the ISC duty ratio
0 to 90 %
[Vehicle Condition]

Engine speed: 3,000 rpm or less

Vehicle speed: 0 km/h (0 mph)

Battery voltage: 8.5 V or more


EVAP VSV (ALONE)
[Test Details]
Activate the VSV for EVAP control
ON or OFF


FUEL PUMP / SPD
[Test Details]
Control the fuel pump
ON or OFF


TC/TE1
[Test Details]
Connect the TC and TE1
ON or OFF


FC IDL PROHBT
[Test Details]
Control the idle fuel cut prohibit
ON or OFF

±
DIAGNOSTICS SFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±15
AVENSIS REPAIR MANUAL (RM1018E)
6CHECK FUEL PRESSURE (See page 11±5)
NGPROCEED TO PAGE 11±1 AND CONTINUE TO
TROUBLESHOOT
OK
7CHECK FOR SPARK (See page 18±1)
NGPROCEED TO PAGE 18±1 AND CONTINUE TO TROUBLESHOOT
OK
PROCEED TO PROBLEM SYMPTOMS TABLE ON PAGE 05±22

05±44
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0121THROTTLE/PEDAL POSITION SENSOR/SWITCH ºAº CIRCUIT
RANGE/PERFORMANCE PROBLEM
CIRCUIT DESCRIPTION
Refer to DTC P0120 on page 05±39
HINT:
This is the troubleshooting procedure of the throttle position sensor.
DTC No.DTC Detecting ConditionTrouble Area
P0121
After the vehicle speed has exceeded 30 km/h (19 mph) once,
and an output value of the throttle position sensor is out of the
applicable range, althought the vehicle speed is more than 0
km/h (0 mph). (2 trip detection logic)

Throttle position sensor
INSPECTION PROCEDURE
HINT:

Read freeze frame data using \f  \b \f\f
 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.

If different DTCs that are related to a different system are output simultaneously while terminal E2 is
used as a ground terminal, terminal E2 may be open.
1 ARE THERE ANY DTC BEING OUTPUT(BESIDES P0121)
(a) Read the DTC using the hand±held tester.
Result:
Display (DTC output)Proceed to
Only ºP0121º is outputA
ºP0121º and other DTCs are outputB
HINT:
If any other codes besides ºP0121º are output, perform the troublesh\
ooting for those DTCs first.
B GO TO RELEVANT DTC CHART
A
REPLACE THROTTLE POSITION SENSOR
05B3T±02

05±174
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0011/59CAMSHAFT POSITION ºAº ±TIMING OVER± ADVANCED OR SYSTEM PERFORMANCE
(BANK 1)
DTCP0012/59CAMSHAFT POSITION ºAº ±TIMING OVER± RETARDED (BANK 1)
CIRCUIT DESCRIPTION
Refer to DTC P0010/39 on page 05±169.
DTC No.DTC Detection ConditionTrouble Area
P0011/59
Condition (a) or (b) continues after engine is warmed up and
engine speed at 400 to 4,000 rpm (Problem of the advanced oil
control valve.):
(a)Valve timing does not change from current valve timing
(b)Current valve timing is fixed

Valve timing

Oil control valve
P0012/59
Condition (a) or (b) continues after engine is warmed up and
engine speed at 400 to 4,000 rpm (Problem of the retarded oil
control valve.):
(a)Valve timing does not change from current valve timing
(b)Current valve timing is fixed
Oil control valve

Camshaft timing gear assy

ECM
WIRING DIAGRAM
Refer to DTC P0010/39 on page 05±169.
INSPECTION PROCEDURE
HINT:
Advanced timing over
(Valve timing is out of specified range)P0011/59
Retarded timing over
(Valve timing is out of specified range)P0012/59

If DTC ºP0011/59 or P0012/59º is displayed, check VVT system circuit.

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 deter\
mining 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.
When using hand±held tester:
1CHECK VALVE TIMING (See page 14±139)
NGADJUST VALVE TIMING (See page 14±139)
OK
05C6S±01

FI0534
05±150
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)

* 2 trip detection logic
When a logic malfunction is first detected, the pend-
ing fault code is stored in the ECM memory (1st trip).
If the same malfunction is detected again during the
second drive test, this second detection causes the
CHK ENG to illuminate (2nd trip) (However, the igni-
tion switch must be turned OFF between the 1st trip
and 2nd trip).

Freeze frame data:
Freeze frame data records the engine condition
when a misfire (DTCs P0300 ± P0304) or fuel trim
malfunction (DTCs P0171) or other malfunction
(first malfunction only), is detected.
Because freeze frame data records the engine
conditions (fuel system, calculated load, engine
coolant temperature, fuel trim, engine speed, ve-
hicle speed, etc.) when the malfunction is detected,
when troubleshooting it is useful for determining
whether the vehicle was running or stopped, the en-
gine warmed up or not, the air±fuel ratio lean or rich,
etc. at the time of the malfunction.

Priorities for troubleshooting:
If troubleshooting priorities for multiple DTCs are
given in the applicable DTC chart, these should be
followed.
(b)Description for M±OBD (Except European spec.)

When troubleshoot Multiplex OBD (M±OBD) ve-
hicles, the only difference from the usual trouble-
shooting procedure is that you connect the hand±
held tester to the vehicle, and read the various data
output from the vehicle's ECM.

The vehicle's on±board computer illuminates the
check engine warning light (CHK ENG) on the
instrument panel when the computer detects a mal-
function in the computer itself or in drive system
components. In addition to an illumination of the
CHK ENG when a malfunction is detected, the ap-
plicable Diagnostic Trouble Codes (DTCs) are re-
corded in the ECM memory (See page 05±161).
When the malfunction does not reoccur, the CHK
ENG is indicated until the ignition switch is turned
off, and then the CHK ENG is not indicated when
the ignition switch is turned on but the DTCs remain
recorded in the ECM memory.

A76859
Hand±Held Tester
3 2 1 45678
9 1 0 111 21 31 41 51 6
DLC3
A04550
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
05±151
AVENSIS REPAIR MANUAL (RM1018E)

To check the DTCs, connect the hand±held tester
to the Data Link Connector 3 (DLC3) on the vehicle
or read the DTC which is indicated on the multi in-
formation display when TC and CG terminals on the
DLC3 are connected. The hand±held tester also
enables you to erase the DTCs and check the
freeze frame data and various forms of engine data.
(for operating instructions, see the instruction
book.)

The diagnosis system operates in the normal mode
during normal vehicle use. It also has a check (test)
mode for technicians to simulate malfunction symp-
toms and troubleshoot. Most DTCs use 2 trip detec-
tion logic* to prevent erroneous detection, and to
ensure a thorough malfunction detection. By
switching the ECM to the check (test) mode using
hand±held tester when troubleshooting, a techni-
cian can cause the CHK ENG to illuminate for a mal-
function that is only detected once or momentarily
(Hand±held tester only) (See step 3).

* 2 trip detection logic
When a logic malfunction is first detected, the pend-
ing fault code is stored in the ECM memory (1st trip).
If the same malfunction is detected again during the
second drive test, this second detection causes the
CHK ENG to illuminate (2nd trip) (However, the igni-
tion switch must be turned OFF between the 1st trip
and 2nd trip).

Freeze frame data:
Freeze frame data records the engine conditions
(fuel system, calculator load, water temperature,
fuel trim, engine speed, vehicle speed, etc.) 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.
(c) Check the DLC3.
The vehicle's ECM uses the ISO 14230(M±OBD) commu-
nication protocol. The terminal arrangement of DLC3
complies with ISO 15031±03 and matches the ISO 14230
format.

±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±155
AVENSIS REPAIR MANUAL (RM1018E)
(b)Clearing the DTCs using the hand±held tester
(1)Connect the hand±held tester to DLC3.
(2)Turn the ignition switch ON.
(3)When operating hand±held tester to erase thecodes, the DTCs and freeze frame data will be
erased. (See the hand±held tester's instruction
book for operating instructions.)
(c)Clearing the DTCs not using the hand±held tester: (1)Disconnecting the battery terminal or remove theEFI fuse for more than 60 seconds.
4.FAIL±SAFE CHART
If any of the following codes are recorded, the engine ECM enters the fa\
il±safe mode.
DTC No.Fail±Safe OperationFail±Safe Deactivation Conditions
P0031/21
P0032/21
P0051/28
P0052/28
The heater circuit in which the abnormality is detected is
turned offIgnition switch OFF
P0100/31
P0102/31
P0103/31Ignition timing is calculated from engine speed and a throttle
angleIf the ECM detects ºPassº condition, the ECM will return to
ºNomal modeº.
P0110/24
P0112/24
P0113/24
Intake air temp. is fixed at 20 C (68 F)If the ECM detects ºPassº condition, the ECM will return to
ºNomal modeº.
P0115/22
P0117/22
P0118/22
Engine coolant temp. is fixed at 80  \bIf the ECM detects ºPassº condition, the ECM will return to
ºNomal modeº.
P0120/41
P0122/41
P0123/41
Fuel cut intermittently while idlingReturned to normal condition and ignition switch OFF
P0325/52
P0327/52
P0328/52
Max. timing retardationIgnition switch OFF
P0351/14
P0352/15
P0353/14
P0354/15
Fuel cutIf the ECM detects ºPassº condition, the ECM will return to
ºNomal modeº.
5.CHECK FOR INTERMITTENT PROBLEMS
Hand±held tester only:
By putting the vehicle's engine ECM in check (test) mode, 1 trip detection logic is possible instead of 2 trip
detection logic, and sensitivity to detect faults is increased. This makes it eas\
ier to detect intermittent prob-
lems.
(a)Clear the DTC. (See step 3.)
(b)Set the check (test) mode. (See step 3.)
(c)Perform a simulation test. (See page 01±22)
(d)Check the connector and terminal. (See page 01±32)
(e)Wiggle the harness and the connector. (See page 01±32)

± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
05±157
AVENSIS REPAIR MANUAL (RM1018E)SHORT FT #1
Short term fuel trim of bank 1/
Min.: ±100 %, Max.: 100%0 20 %

LONG FT #1Long term fuel trim of bank 1/
Min.: ±100 %, Max.: 100 %0 20 %

TOTAL FT #1Total fuel trim of bank 1/
Min.: 0.5, Max.: 1.496Idling: 0.5 to 1.4

TOTAL FT #2Total fuel trim of bank 2/
Min.: 0.5, Max.: 1.496Idling: 0.5 to 1.4

AF FT B1 S1
Short term fuel trim associated
with the bank 1, sensor 1/
Min.: 0, Max.: 1.999
Lean: 0 < 1

Stoichiometric Air±Fuel Ratio = 1

Rich: 1 < 1.999


FUEL SYS #1
Fuel system status (Bank1) /
OL or CL or OLDRIVE or
OLFAULT or CLFAULT
Idling after warming up: CL

OL: Open Loop±has not yet sa-
tisfied conditions to go closed
loop.

CL: Closed Loop±using oxygen
sensor(s) as feed back for fuel
control.

OL DRIVE: Open loop due to
driving conditions. (power enrich-
ment, deceleration enleanment)

OL FAULT: Open loop due to de-
tected system fault.

CL FAULT: Closed loop, but fault
with at least one oxygen sensor
may be using single oxygen sen-
sor for fuel control.
FC IDLIdle fuel cut /
ON or OFFFuel cut operation: ON

CHK ENGCHK ENG status /
ON or OFFCHK ENG ON: ON

STARTER SIGStarter signal /
ON or OFFCranking: ON

A/C SIGA/C signal /
ON or OFFA/C ON: ON

PNP SW [NSW]Neutral position switch signal /
ON or OFFP or N position: ON

ELECT LOAD SIGElectrical load signal /
ON or OFFDefogger switch ON: ON

STOP LIGHT SWStop light switch /
ON or OFF
Brake pedal depressed: ON

Brake pedal released: OFF

PS OIL PRESS SWPower steering signal /
ON or OFFSteering position is;
center: OFF
Except center:ON


PS SIGNALPower steering signal/
ON or OFF
After engine start: OFF

After steer the steering: ON

FUEL PUMP / SPDFuel pump / speed status /
ON/H or OFF/M,LIdling: ON

EVAP VSVVSV status for EVAP control /
ON or OFFVSV operating: ON

VVT CTRL B1VVT control status / ON or OFFVVT system operation: ON

IGNITIONIgnition counter/
Min.: 0, Max.: 4000 to 400

CYL #1, #2, #3, #4Misfire ratio of the cylinder 1/
Min.: 0 %, Max.: 50 %0 %