2005 TOYOTA AVENSIS engine coolant

±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±167
AVENSIS REPAIR MANUAL (RM1018E)
SPD (E10 ± 17) ± E1 (E12 ± 7)
V±W ±BRIG switch ON, rotate driving wheel slowlyPulse generation
(See page 05±240)
TACH (E9 ± 5) ± E1 (E12 ± 7)GR±R ±BRIdlingPulse generation
VC (E13 ± 18) ± E2 (E13 ± 28)R±W ±BRIG switch ON4.5 to 5.5
PRG (E13 ± 12) ± E01 (E13 ± 7)W±G ±W±BIG switch ON8 to 14
VG (E12 ± 24) ± EVG (E12 ± 32)G ±L±YIdling, A/C switch OFF1.1 to 1.5
THW (E13 ± 19) ± E2 (E13 ± 28)B±W ±BRIdling, Engine coolant temp. at 80
C (176
F)0.2 to 1.0
G2+ (E13 ± 26)
± NE± (E13 ± 34)W ±RIdlingPulse generation
(See page 05±229)
NE+ (E13 ± 27) ± NE± (E13 ± 34)G ±RIdlingPulse generation
(See page 05±226)
THA (E13 ± 20) ± E2 (E13 ± 28)G±R ±BRIdling, intake air temp. at 20
C (68
F)0.5 to 3.4
VTA1 (E13 ± 21) LWBRIG switch ON, throttle valve fully closed0.3 to 1.0VTA1 (E13 21)
± E2 (E13 ± 28)L±W ±BRIG switch ON, throttle valve fully open3.2 to 4.9
#1 (E13 ± 1) ± E01 (E13 ± 7)B±R ±W±B#1 (E13 1) E01 (E13 7)
#2 (E13 ± 2) ± E01 (E13 ± 7)
BR WB
Y ±W±BIGswitchON8to14()()
#3 (E13 ± 3) ± E01 (E13 ± 7)W ±W±BIG switch ON8 to 14()()
#4 (E13 ± 4) ± E01 (E13 ± 7)B ±W±B
IGT1 (E13 ± 8) ± E1 (E12 ± 7)R±W ±BRIGT1 (E13 8) E1 (E12 7)
IGT2 (E13 ± 9) ± E1 (E12 ± 7)
RW BR
P ±BRIdlingPulse generation()()
IGT3 (E13 ± 10) ± E1 (E12 ± 7)LG±B ±BRIdlingPulse generation
(See page 05±232)()()
IGT4 (E13 ± 11) ± E1 (E12 ± 7)L±Y ± BR
(g )
IG switch ON4.5 to 5.5
IGF (E13 ± 13) ± E1 (E12 ± 7)W±R ± BRIdlingPulse generation
(See page 05±232)
RSD (E12 ± 10) ± E1 (E12 ± 7)G±R ± W±BIG switch ON9 to 14
OC1+ (E13 ± 15) ± OC1± (E13 ± 14) *1W±G ± Y±BIG switch ONPulse generation
(See page 05±169)
KNK1 (E12 ± 1) ± EKNK (E12 ± 2)B ± WIdlingPulse generation
(See page 05±222)
ELS2 (E9 13) E1 (E12 7)GBRDefoger switch ON9 to 14ELS2 (E9 ± 13) ± E1 (E12 ± 7)G ± BRIG switch ONBelow 3.0
MREL (E9 ± 8) ± E1 (E12 ± 7)GR ± BRIG switch ON9 to 14
IGSW (E9 ± 9) ± E1 (E12 ± 7)B±W ± BRIG switch ON9 to 14
TC (E9 ± 20) ± E1 (E12 ± 7)W±L ± BRIG switch ON9 to 14
SIL (E9 ± 18) ± E1 (E12 ± 7)W±G ± BRConnect hand±held tester to DLC3Pulse generation
ELS (E9 12) E1 (E12 7)GBRTaillight ON9 to 14ELS (E9 ± 12) ± E1 (E12 ± 7)G ± BRIG switch ONBelow 3.0
VAF (E13 ± 32) ± E2 (E13 ± 28) *2P ± BRIG switch ON2.0 to 3.5
*1: For European spec. only
*2: Leaded only

05C6N±01
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±161
AVENSIS REPAIR MANUAL (RM1018E)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your readings due to\
the type of instrument
or other factors.

If a malfunction code is displayed during the DTC check in the check mode, check the circuit f\
or the codes
listed in the table below. For details of each code, refer to the ''See page '' under the respective ''DTC No.''
in the DTC chart.



\f \b
 *1
CHK ENG 
P0010/39 *4 (05±169)Camshaft Position ºAº Actuator
Circuit (Bank 1)
Open or short in oil control valve (OCV) circuit

Oil control valve

ECM

P0011/59 *4
(05±174)Camshaft Position ºAº ±Timing
Over±Advanced or System Per-
formance (Bank 1)
Valve timing

Oil control valve (OCV)

Camshaft timing gear assy


P0012/59 *4
(05±174)Camshaft Position ºAº ±Timing
Over± Retarded (Bank 1)
Camshaft timing gear assy

ECM


P0016/18 *4
(05±181)Crankshaft Position ± Camshaft
Position Correlation (Bank 1
Sensor A)
Mechanical system (Timing chain has jumped a tooth, chain
stretched)

ECM


P0031/21
*2, *4
(05±182)Oxygen (A/F) Sensor Heater
Control Circuit Low (Bank 1 Sen-
sor 1)


P0032/21
*2, *4
(05±182)Oxygen (A/F) Sensor Heater
Control Circuit High (Bank 1
Sensor 1)

Open or short in heater circuit of A/F sensor

A/F sensor heater

P0051/28
*2, *4
(05±182)Oxygen (A/F) Sensor Heater
Control Circuit Low (Bank 2 Sen-
sor 1)
A/F sensor heater

A/F relay

ECM


P0052/28
*2, *4
(05±182)Oxygen (A/F) Sensor Heater
Control Circuit High (Bank 2
Sensor 1)


P0100/31
(05±186)Mass Air Flow Circuit
Ohti ifltiit

P0102/31(05±186)Mass or volume Air Flow Circuit
Low Input
Open or short in mass air flow meter circuit

Mass air flow meter

ECM

P0103/31
(05±186)Mass or volume Air Flow Circuit
High Input
ECM

P0110/24(05±194)Intake Air Temperature Circuit
O h ti itk it i it


P0112/24(05±194)Intake Air Temperature Circuit
Low Input
Open or short in intake air temp. sensor circuit

Intake air temp. sensor (built in mass air flow meter)

ECM


P0113/24
(05±194)Intake Air Temperature Circuit
High Input
ECM


P0115/22(05±199)Engine Coolant Temperature Cir-
cuit
Open or short in engine coolant temperature sensor circuit

P0117/22(05±199)Engine Coolant Temperature Cir-
cuit Low Input
Open or short in engine coolant temperature sensor circuit

Engine coolant temperature sensor

ECM

P0118/22
(05±199)Engine Coolant Temperature Cir-
cuit High Input
ECM

P0120/41 (05±204)Throttle/Pedal Position Sensor/
Switch ºAº Circuit
Throttle position sensor (built in throttle body)

ECM

P0122/41
(05±204)Throttle/Pedal Position Sensor/
Switch ºAº Circuit Low Input

Throttle position sensor (built in throttle body)

Short in VTA1 circuit

Open in VC circuit

ECM



A72925
ECM
THW
E2 19
E13
28
E13 BR B±W
1 25V
R E2
Engine Coolant Temperature Sensor
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
05±199
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0115/22 ENGINE COOLANT TEMPERATURE CIRCUIT
DTC P0117/22 ENGINE COOLANT TEMPERATURE CIRCUIT
LOW INPUT
DTC P0118/22 ENGINE COOLANT TEMPERATURE CIRCUIT
HIGH INPUT
CIRCUIT DESCRIPTION
A thermistor is built in the engine coolant temperature sensor and changes the resistance value according
to the engine coolant temperature.
The structure of the sensor and connection to the ECM is the same as those of the intake air temperature
sensor.
HINT:
If the ECM detects the DTC ºP0115/22, P0117/22 or P0118/22º it enters the fail±safe mode in which the en-
gine coolant temperature is assumed to be 80 C (176 F).
DTC No.Proceed toDTC Detection ConditionTrouble Area
P0115/22Step 1
Open or short in engine cool-
ant temp. sensor circuit for
0.5 sec.

Open or short in engine coolant temperature sensor circuit
P0117/22Step 4Short in engine coolant temp.
sensor circuit for 0.5 sec.

Open or short in engine coolant temperature sensor circuit

Engine coolant temperature sensor

ECM
P0118/22Step 2Open in engine coolant temp.
sensor circuit for 0.5 sec.
HINT:
After confirming DTC ºP0115/22, P0117/22 or P0118/22º, use the hand±held tester to confirm the engine
coolant temperature in the ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALLº.
Temperature DisplayedMalfunction
±40 C (±40 F)Open circuit
140  (284   Short circuit
WIRING DIAGRAM
05C6V±01

05±200
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
HINT:

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.

Read freeze frame data using
\b\b
\b 
\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.
When using hand±held tester:
1READ VALUE OF HAND±HELD TESTER(ENGINE COOLANT TEMPERATURE)
(a)Connect the hand±held tester to the DLC3.
(b)Turn the ignition switch ON and push the hand±held tester main switch \
ON.
(c)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / COOLANT TEMPº and read its value displayed on the hand±held tester.
Temperature: Same value as the actual intake air temperature.
Result:
Temperature DisplayedProceed to
±40C (±40 )A
140 C (284 ) or moreB
OK (Same as present temperature)C
HINT:

If there is an open circuit, the hand±held tester indicates ±40 C (±40 F).

If there is a short circuit, the hand±held tester indicates 140 C (284 F) or more.
BGo to step 4
CCHECK FOR INTERMITTENT PROBLEMS (See page 05±149)
A

A75743
ECM
Engine Coolant
Temperature Sensor
A76786
Wire Harness Side
E2
Engine Coolant Temperature
Sensor Connector
A75742
ECM
Engine Coolant
Temperature Sensor
A18294
THWE2
ECM Connector
E13
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±201
AVENSIS REPAIR MANUAL (RM1018E)
2READ VALUE OF HAND±HELD TESTER(CHECK FOR OPEN IN WIRE HARNESS)
(a)Disconnect the engine coolant temperature sensor con-
nector.
(b)Connect terminals 1 and 2 of the engine coolant tempera- ture sensor connector.
(c)Turn the ignition switch ON.
(d)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / COOLANT TEMPº and read its value displayed on
the hand±held tester.
Temperature value: 140
C (284
F) or more
OKCONFIRM GOOD CONNECTION AT SENSOR. IF OK, REPLACE WATER TEMP. SENSOR
NG
3READ VALUE OF HAND±HELD TESTER(CHECK FOR OPEN IN ECM)
(a)Disconnect the engine coolant temperature sensor con- nector.
(b)Connect terminals THW and E2 of the E13 ECM connec- tor.
HINT:
Before checking, do a visual and contact pressure check for the
ECM connector.
(c)Turn the ignition switch ON.
(d)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST
/ ALL / COOLANT TEMPº and read its value displayed on
the hand±held tester.
Temperature value: 140
C (284
F) or more
OKREPAIR OR REPLACE HARNESS OR CONNECTOR
NG
CONFIRM GOOD CONNECTION AT ECM. IF OK, CHECK AND REPLACE ECM (See page 01±32)

A75766
ECM
Engine Coolant
Temperature Sensor
A75744
ECM
Engine Coolant
Temperature Sensor
A65743ECM Connector
E13
05±202
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
4READ VALUE OF HAND±HELD TESTER(CHECK FOR SHORT IN WIRE HARNESS)
(a)Disconnect the engine coolant temperature sensor con- nector.
(b)Turn the ignition switch ON.
(c)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / COOLANT TEMPº and read its value displayed on
the hand±held tester.
Temperature value: ±40
C (±40
F)
OKREPLACE ENGINE COOLANT TEMPERATURE SENSOR
NG
5READ VALUE OF HAND±HELD TESTER(CHECK FOR SHORT IN ECM)
(a)Disconnect the E13 ECM connector.
(b)Disconnect the engine coolant temperature sensor con- nector.
(c)Turn the ignition switch ON.
(d)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / COOLANT TEMPº and read its value displayed on
the hand±held tester.
Temperature: ±40
C (±40
F)
OKREPAIR OR REPLACE HARNESS OR CONNECTOR
NG
CHECK AND REPLACE ECM (See page 01±32)

A18294
THWE2
ECM Connector
E13
A65743
THWE2
ECM Connector
E13
A76786
Wire Harness Side
E2Engine Coolant Temperature
Sensor Connector
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±203
AVENSIS REPAIR MANUAL (RM1018E)
When not using hand±held tester:
1INSPECT ECM(THW VOLTAGE)
(a)Turn the ignition switch ON.
(b)Measure the voltage between terminals THW and E2 of
the ECM connector.
Voltage:
Intake air temp.Voltage
20
C (68
F)0.5 to 3.4 V
60
C (140
F)0.2 to 1.0 V
OKCHECK FOR INTERMITTENT PROBLEMS
(See page 05±149)
NG
2INSPECT ENGINE COOLANT TEMPERATURE SENSOR (See page 10±20)
NGREPLACE ENGINE COOLANT TEMPERATURE SENSOR
OK
3CHECK HARNESS AND CONNECTOR(ECM ± EFI WATER TEMP. SENSOR)
(a)Disconnect the E13 ECM connector.
(b)Disconnect the engine coolant temperature sensor con- nector.
(c)Check for continuity between the wire harness side con- nector.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
THW (E13±19) ± Engine coolant temperature sensor (E2±2)ContinuityE2 (E13±28) ± Engine coolant temperature sensor (E2±1)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
THW (E13±19) or Engine coolant temperature sensor (E2±2)
± Body groundContinuity
MGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

A71007
MassAir Flow Meter Crankshaft Position Sensor
Actual Valve TimingCorrection Target Valve Timing
Feedback
Duty Control ECM
Camshaft Timing
Oil Control
Valve (OCV)
Vehicle Speed Signal Engine Coolant Temp. SensorThrottle Position Sensor
Camshaft Position Sensor
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
05±169
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0010/39 CAMSHAFT POSITION ºAº ACTUATOR
CIRCUIT (BANK 1)
CIRCUIT DESCRIPTION
The VVT system controls the intake camshaft to provide the optimal valve timing for every driving condition. This control
is performed based on the signals, such conditions as intake air volume, throttle position and engine coolant tempera-
ture.
The ECM controls the oil control valve (OCV), based on the signals output from the sensors. The VVT controller regu-
lates the intake camshaft angle using oil pressure through the oil control valve (OCV). As result, the relative position
between the camshaft and the crankshaft becomes optimal, and the engine torque improves, fuel economy improves,
exhaust emissions decrease under overall driving conditions. Also, the ECM detects the actual valve timing using the
signals from the camshaft position sensor and the crankshaft position sensor, and performs feedback control. This is
how target valve timing is achieved by the ECM.
DTC No.DTC Detection ConditionTrouble Area
P0010/39Open or short in oil control valve (OCV) circuit

Open or short in oil control valve circuit

Oil control valve

ECM
05C6R±01