2005 TOYOTA AVENSIS code

FI0534
05±6
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
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.
If no instructions are given, troubleshoot according to the fol-
lowing priorities.
(1) DTCs other than fuel trim malfunction (DTCs
P0171) and misfire (DTCs P0300 ± P0304).
(2) Fuel trim malfunction (DTCs P0171).
(3) Misfire (DTCs P0300 ± P0304).
(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.

A76859
Hand±Held Tester
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±7
AVENSIS REPAIR MANUAL (RM1018E)

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±16).
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.

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).

A76859
Hand±Held Tester
±
DIAGNOSTICS SFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±9
AVENSIS REPAIR MANUAL (RM1018E)
2. DTC CHECK (Nomal Mode) :
NOTICE:
Hand±held tester only:
When the diagnosis system is switched from the normal
mode to the check (test) mode, it erases all DTCs and freeze
frame data recorded in the normal mode. So before switch-
ing modes, always check the DTCs and freeze frame data,
and then write them down.
(a) Checking DTCs using the hand±held tester.
(1) Connect the hand±held tester to the DLC3.
(2) Turn the ignition switch ON and switch the hand±
held tester main switch ON.
(3) Use the hand±held tester to check the DTCs and freeze frame data and then write them down. The
hand±held tester's instruction book.
(4)See page 05±16 to confirm the details of the DTCs.
(b) Clearing the DTCs using the hand±held tester: (1) Connect the hand±held tester to the DLC3.
(2) Turn the ignition switch ON.
(3) When operating hand±held tester to erase the
codes, 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) Disconnect the battery terminal or remove the EFIfuse for more than 60 seconds.
3. DTC CHECK (Check Mode):
HINT:
Hand±held tester only:
Compared to the normal mode, the check mode has more sens-
ing ability to detect malfunctions.
Furthermore, the same diagnostic items which are detected in
the normal mode can also be detected in the check (test) mode.
(a) Proceduce for check mode using hand±held tester.
(1) Check the initial conditions

Battery positive voltage 11V or more.

Throttle valve fully closed.

Transmission in the ºPº or ºNº position.

Air conditioning switched OFF.
(2) Turn the ignition switch OFF.

A76859
Hand±Held Tester
FI3605
ON
OFFBlinking
0.13 Second
05±10
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
(3) Connect the hand±held tester to the DLC3.
(4) Turn the ignition switch and the hand±held tester
main switch ON.
(5) Switch the hand±held tester from the normal mode
to the check (test) mode. The CHK ENG blinks in
0.13 sec interval as shown in the illustration.
NOTICE:
If the hand±held tester switches the ECM from the normal
mode to the check mode or vice±versa, or if the ignition
switch is turned from ON to ACC or OFF during the check
mode, the DTC and freeze frame data will be erased.
(6) Start the engine. (The CHK ENG lamp goes out af-
ter the engine start.)
(7) Simulate the conditions of the malfunction de-
scribed by the customer.
NOTICE:
Leave the ignition switch ON until you have checked the
DTC, etc.
(8) After simulating the malfunction conditions, use the
hand±held tester diagnosis selector to check the
DTCs and freeze frame data, etc.
HINT:
Be sure not to turn the ignition switch OFF, because the diagno-
sis system is changed from the check mode to the nomal mode
and will result in all of the DTCs and freeze frame data being
erased.
(9) After checking the DTCs, inspect the applicable cir-
cuit.
(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 the
codes, 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) Disconnect the battery terminal or remove the EFI
fuse for more than 60 seconds.

±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±11
AVENSIS REPAIR MANUAL (RM1018E)
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
P0100Ignition timing is fixed at 
\b\f
If the ECM detects ºPassº condition, the ECM will return to
ºNomal modeº.
P0110Intake air temperature is fixed at 20
C (68
F)If the ECM detects ºPassº condition, the ECM will return to
ºNomal modeº.
P0115Water temperature is fixed at 80

If the ECM detects ºPassº condition, the ECM will return to
ºNomal modeº.
P0120VTA is fixed at 0
The following condition must be repeated at least 2 times
consecutively when closed throttle position switch is OFF:
VTA greater than 0.1 V and less than 0.95 V
P0135
P0141The heater circuit in which an abnormality is detected is
turned offIgnition switch OFF
P0325Max. timing retardationIgnition switch OFF
P1300
P1305
P1310
P1315
Fuel cutIf the ECM detects ºPassº condition, the ECM will return to
ºNomal modeº.
P1656It cut electrically the circuit in which an abnormality is de-
tectedIf 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±32)
(d)Check the connector and terminal. (See page 01±32)
(e)Wiggle the harness and the connector. (See page 01±32)
6. DATA LIST
HINT:
Using the DATA LIST displayed by the hand±held tester, you can read the value of the switches, sensors,
actuators and so on without parts removal. Reading the DATA LIST as a first step of troubleshooting is one
of the method to shorten diagnostic time.
NOTICE:
The values given below for ºNormal Conditionº are representative valu\
es. A vehicle may still be nor-
mal even if the measured values are a little different from those listed here. Do\
not decide whether
a part is faulty or not solely according to the ºNormal Conditionº\
here.
(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 / DATA LIST / ALLº.
(g) According to the display on tester, read the ºDATA LISTº.

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

± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
05±175
AVENSIS REPAIR MANUAL (RM1018E)
2 PERFORM ACTIVE TEST BY HAND±HELD TESTER(OPERATION OF OCV)
(a) Connect the hand±held tester to the DLC3.
(b) Start the engine and warm it up.
(c) Turn the ignition switch ON and push the hand±held tester main switch ON.
(d) Select the item ºDIAGNOSIS / OBD/MOBD / ACTIVE TEST / VVT CTRL B1º.
(e) Check the engine speed when operating the OCV by the hand±held tester.
Standard:
Tester operationSpecified condition
OCV is OFFNormal engine speed
OCV is ONRough idle or engine stall
OK Go to step 4
NG
3 READ OUTPUT DTC(CHECK IF DTC OUTPUT RECURS)
(a) Clear the DTC.
(1) Operating the hand±held tester to erase the codes, or disconnecting the battery terminal or the
EFI and ECTS fuses for more than 60 sec.
(b) Start and warm up the engine.
(c) Drive the vehicle around for 10 minutes or more.
(d) Read output DTC using the hand±held tester.
Standard: No DTC output.
HINT:
*: DTCs P0011/59 or P0012/59 is output when a foreign object in engine oil is caught in some part of the
system. These codes will stay registered even if the system returns to normal after a short time. These for-
eign objects are then captured by the oil filter, thus eliminating the source of the problem.
OK VVT SYSTEM OK*
NG

±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±177
AVENSIS REPAIR MANUAL (RM1018E)
9REPLACE CAMSHAFT TIMING GEAR ASSY
GO
10CHECK FOR BLOCKAGE(OCV, OIL CHECK VALVE AND OIL HOLE)
NGREPAIR OR REPLACE
OK
11READ OUTPUT DTC(CHECK IF DTC OUTPUT RECURS)
(a)Clear the DTC. (1)Operating the hand±held tester to erase the codes, or disconnecting the batter\
y terminal or the
EFI and ECTS fuses for more than 60 sec.
(b)Start and warm up the engine.
(c)Drive the vehicle around for 10 minutes or more.
(d)Read output DTC using the hand±held tester.
Standard: No DTC output.
HINT:
*: DTCs P0011/59 or P0012/59 is output when a foreign object in engine oil is caught\
in some part of the
system. These codes will stay registered even if the system returns to normal a\
fter a short time. These for-
eign objects are then captured by the oil filter, thus eliminating the source of the problem.
OKVVT SYSTEM OK*
NG
CHECK AND REPLACE ECM (See page 01±32)
When not using hand±held tester:
1CHECK VALVE TIMING (See page 14±139)
NGADJUST VALVE TIMING (See page 14±139)
OK