2005 TOYOTA AVENSIS diagnostic

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).

3 2 1 45678
9 1 0 111 21 31 41 51 6
DLC3
A04550
FI0534
05±8
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)

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 9141±2 (Euro±OBD)/
ISO 14230(M±OBD) communication protocol. The termi-
nal arrangement of DLC3 complies with ISO 15031±03
and matches the ISO 9141±2/ ISO 14230 format.
Terminal No.Connection / Voltage or ResidenceCondition
7Bus + Line / Pulse generation+During transmission
4Chassis Ground ± Body Ground / 1
or lessAlways
16Battery Positive ± Body Ground / 9 to 14 VAlways
HINT:
If the display shows ºUNABLE TO CONNECT TO VEHICLEº
when you have connected the cable of the hand±held tester to
the DLC3, turned the ignition switch ON and operated the
hand±held tester, there is a problem on the vehicle side or tool
side.

If communication is normal when the tool is connected to
another vehicle, inspect the DLC3 on the original vehicle.

If communication is still not possible is when the tool is
connected to another vehicle, the problem is probably in
the tool itself, so consult the Service Deparment listed in
the tool's instruction manual.
(d) Inspect the battery voltage.
Battery voltage: 11 to 14 V
If voltage is below 11V, recharge the battery before proceeding.
(e) Check the CHK ENG.
(1) The CHK ENG lamp comes on when the ignition
switch is turned ON and the engine is not running.
HINT:
If the CHK ENG lamp is not illuminated, troubleshoot the com-
bination meter.
(2) When the engine is started, the CHK ENG should
go off. If the lamp remains on, it means that the diag-
nosis system has detected a malfunction or ab-
normality in the system.

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±12
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)Hand±held tester display
Measurement Item/Range
(Display)Normal Condition*1Diagnostic Note
FUEL SYS #1
Fuel System Bank 1
OPEN: Air±fuel ratio feedback
stopped
CLOSED: Air±fuel ratio feedback
operating
Idling after warming up: CLOSED
CALC LOAD
Calculator Load:
Current intake air volume as a pro-
portion of max. intake air volumeIdling: 3.3 to 26.7 %
Runnig without load (2,500rpm):
12.0 to 14.7 %

COOLANT TEMPCoolant temperature/
Min.: ±40
C, Max.: 140
CAfter warming up: 80 to 95C (176
to 203
If the value is º±40
Cº or
º
140
Cºsensor circuit is open or
INTAKE AIRIntake air temperature/
Min.: ±40
C, Max.: 140
CEquivalent to Ambient Temp.
º140
Cº, sensor circuit is open or
shorted.
SHORT FT #1Short±term Fuel Trim Bank 10  20%
LONG FT #1Long±term Fuel Trim Bank 10  20%
MAF/AFMAir flow rate from mass air flow
Meter
Idling: M/T 0.54 to 4.33 gm/sec.
A/T 0.58 to 4.67 gm/sec.
Running without load (2,500 rpm):
3.33 to 9.17 gm/sec.

ENGINE SPDEngine SpeedIdling: 600 to 700 rpm
VEHICLE SPDVehicle SpeedActual vehicle speedSpeed indicated on speedmeter.
IGN ADVANCEIgnition Advance:
Ignition Timing of Cylinder No. 1Idling: BTDC 5 to 15
THROTTLE POS
Voltage Output of Throttle Position
Sensor
Calculated as a percentage:
0 V 0%, 5 V 100%
Throttle Fully Closed: 6 to 16 %
Throttle Fully Open: 64 to 98 %Read the value with ignition switch
ON (Do not start engine)
O2S B1, S1Voltage Output of Heated Oxygen
Sensor Bank 1, Sensor 1Idling: 0.05 to 0.95 V
O2FT B1, S1
Heated Oxygen Sensor Fuel Trim
Bank 1, Sensor 1
(Same as SHORT FT #1)
0  20 %
INJECTORFuel injection time for cylinder
No.1Idling: 1.0 to 3.0 ms
ISC DUTY RATIO
Intake Air Control Valve duty ratio
Opening ratio rotary solenoid type
ISC valve
Idling: 20 to 40 %
STARTER SIGStarter SignalCranking: ON
CTP SWClosed Throttle Position Switch
SignalCranking: ON
A/C SIGA/C Switch SignalA/C ON: ON
STOP LIGHT SW *2Stop Light Switch SignalStop light switch ON: ON
FC IDL
Fuel Cut Idle: Fuel cut when
throttle valve fully closed, during
deceleration
Fuel cut operating: ON
PNP SW/NSW *2Neutral start switch signalP or N position: ON
FC TAUFuel Cut TAU: Fuel cut during very
light loadFuel cut operating: ON
CYL#1, CYL#2, CYL#3, CYL#4Abnormal revolution variation for
each cylinder0 %
FUEL PUMPFuel Pump SignalIdling: ON
EVAP (PURGE) VSVEVAP VSV SignalVSV operation: Above 30 %

± 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

05±14
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
BASIC INSPECTION
When the malfunction is not confirmed in the DTC check, troubleshooting \
should be carried out in all the
possible circuits considered as causes of the problem. In many cases, by carrying out the basic engine check
shown in the following flow chart, the location causing the problem can be found quickly and efficiently.
Therefore, using this check is essential in the engine troubleshooting.
1CHECK BATTERY VOLTAGE
NOTICE:
Carry out this check with the engine stopped and ignition switch off. Reference:
OKNG
Voltage11 V or moreLess than 11 V
NGCHARGE OR REPLACE BATTERY
OK
2CHECK IF ENGINE WILL CRANK
NGPROCEED TO PROBLEM SYMPTOMS TABLE ON PAGE 05±22
OK
3CHECK IF ENGINE STARTS
NGGO TO STEP 6
OK
4CHECK AIR FILTER
(a)Visually check that the air filter is not excessively dirty or oily.
HINT:
If necessary, clean the filter with compressed air. First blow from the inside thoroughly, then blow from the
outside of filter. NGREPAIR OR REPLACE
OK
5CHECK IDLE SPEED (See page 14±1)
NGPROCEED TO PROBLEM SYMPTOMS TABLE ON PAGE 05±22
OK