TOYOTA AVENSIS 2005 Service Repair Manual

05±156
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
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 values. 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.
Hand±held Tester DisplayMeasurement Item/Range
(Display)Normal ConditionDiagnostic Note
INJECTORInjection period/
Min.: 0 ms, Max.: 32.64 msIdling: 1.92 to 3.37 ms

IGN ADVANCEIgnition timing advance/
Min.: ±64 deg., Max.: 63.5 deg.Idling: BTDC 5 to 15 deg.

CALC LOADCalculated load by engine ECM/
Min.: 0 %, Max.: 100 %

Idling: 3.3 to 26.7 %

Running without load (2,500
rpm):
12.0 to 14.7 %


MAFAir flow rate from MAF sensor/
Min.: 0 gm/s, Max.: 655 gm/s

Idling:
M/T 0.54 to 4.33 gm/sec.
A/T 0.58 to 4.67 gm/sec.

Runnning without load (2,500
rpm):
3.33 to 9.17 gm/sec.


ENGINE SPDEngine Speed/
Min.: 0 rpm, Max.: 16,383 rpmIdling:
M/T 650 to  rpm
A/T 550 to  rpm


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 º140
Cº i it i
INTAKE AIRIntake air temperature/
Min.: ±40 C, Max.: 140 CEquivalent to ambient temp.
Cº, sensor circuit is open or
shorted.
THROTTLE POSAbsolute throttle position sensor/
Min.: 0 %, Max.: 100 %
Throttle fully closed: 6 to 16 %

Throttle fully open: 64 to 98 %Read the value with ignition switch
ON (Do not start engine)
CTP SWClosed throttle position switch/
ON or OFF
Throttle fully closed: ON

Throttle open: OFF

VEHICLE SPDVehicle speed/
Min.: 0 km/h, Max.: 255 km/hVehicle stopped: 0 km/h (0 mph)

O2S B1 S2
Oxygen sensor output voltage of
the bank 1 sensor 2/
Min.: 0 V, Max.: 1.275 V
Idling: 0.1 to 0.9 V

AFS B1 S1
A/F sensor output voltage of the
bank 1 sensor 1/
Min.: 0 V, Max.: 7.999 V
Idling: 2.8 to 3.8 V

± 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 %

05±158
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)THROTTLE POS
Throttle position sensor output
voltage/
Min.: 0 V, Max.: 5 V
Throttle fully closed: 0.3 to 0.8 V

Throttle fully open: 3.2 to 4.9 VRead the value with ignition switch
ON (Do not start engine)
THROTTLE TARGTTarget position of throttle valve/
Min.: 0 V, Max.: 5 VIdling: 0.4 to 1.0 VRead the value with ignition switch
ON (Do not start engine)
If no conditions are specifically stated for ºldlingº, it means the shift lever is at N or P position, the A/C switch
is OFF and all accessory switches are OFF.
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 diagnostic 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: 3000 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 %  25 % (Change the injection volume ±12.5 % or 25 %.)
[Vehicle Condition]
Engine speed: 3000 rpm or less.
The following procedure of A/F
CONTROL enables the technician
to check and graph the voltage
outputs of both the A/F sensor and
heated oxygen sensor.
To display the graph indication, se-
lect O2S B1 S1 or A/F B1S1 and
press button º4º after selecting
ºACTIVE TEST/A/F CONTROL/
USER DATAº.
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


VVT CTRL B1
[Test Details]
Activate the VVT system.
ON or OFF
ON: Rough idle or engine stall.

OFF: Normal engine speed.
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(1AZ±FE)
05±159
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±168
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±101)
NGPROCEED TO PROBLEM SYMPTOMS TABLE ON PAGE 05±168
OK

05±160
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
6CHECK FUEL PRESSURE (See page 11±19)
NGPROCEED TO PAGE 11±15 AND CONTINUE TO TROUBLESHOOT
OK
7CHECK FOR SPARK (See page 18±7)
NGPROCEED TO PAGE 18±7 AND CONTINUE TO TROUBLESHOOT
OK
PROCEED TO PROBLEM SYMPTOMS TABLE ON PAGE

05±122
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP1656OCV CIRCUIT MALFUNCTION (BANK 1)
CIRCUIT DESCRIPTION
Refer to DTC P1349 on page 05±112.
DTC No.DTC Detecting ConditionTrouble Area
P1656Open or short in oil control valve (OCV) circuit

Open or short in OCV circuit

OCV

ECM
WIRING DIAGRAM
Refer to DTC P1349 on page 05±112.
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 determi\
ning whether the vehicle was running
or stopped, the engine was warmed up or not, the air±fuel ratio was lea\
n or rich, etc. at the time of the mal-
function.
1PERFORM ACTIVE TEST BY HAND±HELD TESTER(OCV OPERATION)
(a)Start the engine and warm it up.
(b)Connect the hand±held tester and select the VVT on the ACTIVE TEST me\
nu.
(c)Check the engine speed while operating the OCV by using the hand±held\
tester. Result:
VVT system is OFF (OCV is OFF): Normal engine speed
VVT system is ON (OCV is ON): Rough idle or engine stalled
OKCHECK FOR INTERMITTENT PROBLEMS(See page 05±5)
NG
2INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY (See page 10±3)
NG REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSY
OK
3INSPECT ECM(CHECK VOLTAGE) (See page 05±20)
NG CHECK AND REPLACE ECM (See page 01±32)
OK
05B4A±02

A65743OCV+OCV±
E13
ECM Connector
Camshaft Timing Oil Control Valve
Connector
A53155
Wire Harness Side
C2
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±123
AVENSIS REPAIR MANUAL (RM1018E)
4CHECK HARNESS AND CONNECTOR(ECM ± OCV)
(a)Disconnect the camshaft timing oil control valve connec-
tor.
(b)Disconnect the E13 ECM connector.
(c)Check for continuity between the wire harness side con- nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
Oil control valve (C2±1) ± OCV+ (E13±14)ContinuityOil control valve (C2±2) ± OCV± (E13±15)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
Oil control valve (C2±1)or OCV+ (E13±14) ± Body groundNocontinuityOil control valve (C2±2)or OCV± (E13±15) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK FOR INTERMITTENT PROBLEMS (See page 05±5)

A63955
GND
CH1
(G2+)
CH2
(NE+) GND
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±229
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0340/12CAMSHAFT POSITION SENSOR ºAº
CIRCUIT (BANK 1 OR SINGLE SENSOR)
DTCP0341/12CAMSHAFT POSITION SENSOR ºAº CIRCUIT RANGE/PERFORMANCE (BANK 1
OR SINGLE SENSOR)
CIRCUIT DESCRIPTION
The camshaft position sensor (G signal) consists of a magnet, iron core a\
nd pickup coil.
The G signal rotor has 3 teeth on its outer circumference and is install\
ed on the intake camshaft.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil changes,
causing fluctuations in the magnetic field and generating an electromoti\
ve force in the pickup coil.
The NE signal plate (crankshaft position sensor plate) has 34 teeth an\
d is installed to the crankshaft. The
NE signal sensor generates 34 signals at every engine revolution. The EC\
M detects the crankshaft angle
and the engine revolution based on the NE signals, and the cylinder and the\
angle of the VVT based on the
combination of the G and NE signals.
DTC No.DTC Detection ConditionTrouble Area
P0340/12

No camshaft position sensor signal to ECM during cranking
(1 trip detection logic)
Open or short in camshaft position sensor circuit
ChftitiP0340/12(1 tri detection logic)

No camshaft position sensor signal to ECM with engine
speed 600 rpm or more (1 trip detection logic)
Camshaft position sensor

Camshaft timing pulley

Timingchainhasjumpedatooth
P0341/12While crankshaft rotates twice, camshaft position sensor signal
is input to ECM 12 times or more (1 trip detection logic)
Timing chain has jumped a tooth

ECM
Reference: Inspection using the oscilloscope.
HINT:
The correct waveform is as shown on the left.
ItemContents
TerminalCH1: G2+ ± NE±
CH2: NE+ ± NE±
Equipment Set5V/DIV, 20ms/DIV
ConditionDuring cranking or idling
WIRING DIAGRAM
Refer to DTC P0335/12, 13 and P0339/13 on page 05±226.
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 determi\
ning whether the vehicle was running
or stopped, the engine was warmed up or not, the air±fuel ratio was lea\
n or rich, etc. at the time of the mal-
function.
05C71±01

A73303
G±G+
Camshaft Position Sensor C1


A66132
G+G±
Camshaft Position Sensor Connector Wire Harness Side
C1
A65743NE± G2
E13
ECM Connector
05±230
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
1 INSPECT CAMSHAFT POSITION SENSOR
(a) Measure the resistance between the terminals of cam-
shaft posision sensor connector.
Resistance:
835 to 1,400  (Cold)
1,060 to 1,645 (Hot)
NOTICE:
ºColdº and ºHotº mean the temperature of the coils them-
selves. 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).
NG REPLACE CAMSHAFT POSITION SENSOR
OK
2 CHECK HARNESS AND CONNECTOR(ECM ± CAMSHAFT POSITION SENSOR)
(a) Disconnect the camshaft position sensor connector.
(b) Disconnect the E13 ECM connector.
(c) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
G+ (C1±1) ± G2 (E13±26)ContinuityG± (C1±2) ± NE± (E13±34)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
G+ (C1±1) or G2+ (E13±26) ± Body groundNo continuityG± (C1±2) or NE± (E13±34) ± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
3 CHECK SENSOR INSTALLATION(CAMSHAFT POSITION SENSOR)
(a) Check the camshaft position sensor installation.
NG TIGHTEN SENSOR
OK

±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±231
AVENSIS REPAIR MANUAL (RM1018E)
4INSPECT CAMSHAFT
(a)Check the teeth of the signal plate.
NGREPLACE CAMSHAFT
OK
CHECK AND REPLACE ECM (See page 01±32)