2005 TOYOTA AVENSIS Circuit

A81703
From
Speed SensorSkid
Control
ECU4−Pulse
Combination
MeterECM 4−Pulse
A76866
Combination MeterECM
C11V−W
SPD 17
V−W
E10 J/C
18 H
J10
(LHD)J20H
(RHD)H
J10
(LHD)J20H
(RHD)
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−183
AVENSIS Supplement (RM1045E)
DTC P0500 VEHICLE SPEED SENSOR ”A”
DTC P0503 VEHICLE SPEED SENSOR ”A”
INTERMITTENT/ERRATIC/HIGH
CIRCUIT DESCRIPTION
The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The
skid control ECU converts these wheel speed signals into a 4−pulse signal and outputs it to the ECM via
the combination meter. The ECM determines the vehicle speed based on the frequency of these pulse sig-
nals.
DTC No.DTC Detection ConditionTrouble Area
P0500
P0503No vehicle speed sensor signal to ECM under the following
condition (1 trip detection logic):
(a) Vehicle is being driven
SCombination meter
SOpen or short in vehicle speed sensor circuit
SVehicle speed sensor
SECM
SSkid control ECU
SClutch or brake slips or gear is broken
WIRING DIAGRAM
05CJ6−02

A59661
E1 (−)
SPD (+)
ECM ConnectorE11
E10
A81704
4.5 to
5.5V
0V
Turn Wheel
05−184
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
INSPECTION PROCEDURE
HINT:
Read freeze frame data usingthe hand−held tester. Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, if the air−fuel ratio was lean or rich, and other data
from the time the malfunction occurred.
1CHECK OPERATION OF SPEEDOMETER
(a) Drive the vehicle and check if the operation of the speedometer in the combination meter is normal.
HINT:
The vehicle speed sensor is operating normally if the speedometer display is normal.
NG CHECK SPEEDOMETER CIRCUIT (See page
05−1510 of Pub. No. RM1018E AVENSIS)
OK
2 INSPECT ECM(SPD VOLTAGE)
(a) Shift the lever to the neutral position.
(b) Jack up the vehicle.
(c) Turn the ignition switch to ON.
(d) Check the voltage between the specified terminals of the
E10 and E11 ECM connectors as the wheel is turned
slowly.
Standard:
Tester ConnectionSpecified Condition
SPD (E10−17)−E1 (E11−1)Generated intermittently
HINT:
The output voltage should fluctuate up and down similarly to the
diagram on the left as the wheel is turned slowly.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ECM (See page10−65 of Pub. No. RM1018E AVENSIS)

A76875
ECM
EVP1 34
E13 EFI Relay
1 1 23
Engine Room
J/B No. 4B−W
1MREL 8
E9
Battery FL MAIN B−G2 5
GR
V5
VSV (EVAP)
2
W−G EFI No. 2 1
B−G
W−B
ECW−B
4A
14B 11AEFI
1B−Y
1
2 4
4
44
4
4
B−W Engine Room
R/B No. 1Engine Room R/B No. 4
GR
B−W
EA113IE1 2 Engine Room
J/B No. 1
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−179
AVENSIS Supplement (RM1045E)
DTC P0443 EVAPORATIVE EMISSION CONTROL
SYSTEM PURGE CONTROL VALVE CIRCUIT
CIRCUIT DESCRIPTION
To reduce HC emissions, evaporated fuel from the fuel tank is routed through the charcoal canister to the
intake manifold for combustion in the cylinders.
The ECM changes the duty signal to the VSV for EVAP so that the intake amount of HC emissions is ap-
propriate for the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is
warmed up.
DTC No.DTC Detection ConditionTrouble Area
P0443Proper response to ECM command does not occur
SOpen of short in VSV for EVAP circuit
SVSV for EVAP
SECM
WIRING DIAGRAM
05HIM−01

A90210
Engine Room R/B No. 4:EFI No.2 fuse
A66053
Engine Room R/B No. 4:
EFI Relay
A51984A52933
Wire Harness Side:
VSV for EVAP Connector
V5
Front View
05−1 82
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
5 CHECK HARNESS AND CONNECTOR(EFI RELAY − VSV FOR EVAP)
(a) Inspect the EFI No. 2 fuse.
(1) Remove the EFI No. 2 fuse from the engine room R/B No. 4.
(2) Check for continuity in the EFI No. 2 fuse.
Standard: Continuity
(3) Reinstall the EFI No. 2 fuse.
(b) Remove the EFI relay from the engine room R/B No. 4.
(c) Disconnect the V5 VSV for EVAP connector.
(d) Check the resistance between the wire harness side con- nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Engine room R/B No.4 (EFI relay terminal 3) −
VSV for EVAP (V5 −1)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Engine room R/B No.4 (EFI relay terminal 3) or
VSV for EVAP (V5−1) − Body ground10 k
or higher
(e) Reinstall the EFI relay.
(f) Reconnect the VSV for EVAP connector.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK FOR ECM POWER SOURCE CIRCUIT (See page 05 −236)

− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−167
AVENSIS Supplement (RM1045E)
DTC P0351IGNITION COIL ”A” PRIMARY/SECONDARY
CIRCUIT
DTC P0352 IGNITION COIL ”B” PRIMARY/SECONDARY
CIRCUIT
DTC P0353 IGNITION COIL ”C” PRIMARY/SECONDARY
CIRCUIT
DTC P0354 IGNITION COIL ”D” PRIMARY/SECONDARY
CIRCUIT
HINT:
SThese DTCs indicate a malfunction related to the primary circuit.
SIf DTC P0351is displayed, check No.1ignition coil with igniter circuit.
SIf DTC P0352 is displayed, check No. 2 ignition coil with igniter circuit.
SIf DTC P0353 is displayed, check No. 3 ignition coil with igniter circuit.
SIf DTC P0354 is displayed, check No. 4 ignition coil with igniter circuit.
CIRCUIT DESCRIPTION
A Direct Ignition System (DIS) is used on this vehicle. The DIS improves the ignition timing accuracy, reduces
high−voltage loss, and enhances the overall reliability of the ignition system by eliminating the distributor.
The DIS is a1−cylinder ignition system which ignites one cylinder with one ignition coil. In the1−cylinder
ignition system, the one spark plug is connected to the end of the secondary winding. High voltage generated
in the secondary winding is applied directly to the spark plug. The spark of the spark plug passes from the
center electrode to the ground electrode.
The ECM determines the ignition timing and outputs the ignition signals (IGT) for each cylinder. Using the
ignition (IGT) signal, the ECM turns on and off the power transistor inside the igniter and this switches on
and off the current to the primary coil. When the current flow to the primary coil is cut off, high−voltage is
generated in the secondary coil and this voltage is applied to the spark plugs to spark inside the cylinders.
As the ECM cuts the current to the primary coil, the igniter sends back the ignition confirmation (IGF) signal
for each cylinder ignition to the ECM.
05HIL−01

A83838
Crankshaft
Position
Sensor
Camshaft
Position
SensorIGT1
IGF
IGT2
IGT3
IGT4 ECM
No.1Spark Plug
No. 2 Spark Plug
No. 3 Spark Plug
No. 4 Spark Plug IgniterFrom Battery
Ignition Coil
TACH
To Tachometer Other Sensors
(Engine Coolant Sensor,
Air Flow Sensor, Throttle
Position Sensor, etc.)No.2 Ignition
Coil with igniter
No.3 Ignition
Coil with igniter
No.4 Ignition
Coil with igniterNo.1Ignition
Coil with igniter
GND
GND CH1
CH2
A35500
Normal Signal Waveforms 05−168
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E) DTC No.
DTC Detection ConditionTrouble Area
P0351
P0352
P0353
P0354
No IGF signal to ECM while engine is running
SIgnition system
SOpen or short in IGF and IGT circuit between ignition coil with
igniter and ECM (ignition coil circuit1through 4)
SIgnition coil with igniter (ignition coil1through 4)
SIG2 relay
SECM
Reference: Inspection using the oscilloscope.
HINT:
The correct waveforms are as shown on the left.
ItemDetails
TerminalCH1: IGT1, IGT2, IGT3, IGT4−E1
CH2: IGF1−E1
Equipment Setting2 V/Division, 20 ms/Division
ConditionWhile the engine is cranking or idling

B16200
A54393
Wire Harness Side:
Ignition Coil Connector
+B
I1I2
I3I4
Front View
A66053A79064IG2 Relay
Engine Room R/B No. 4:
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −1 73
AVENSIS Supplement (RM 1045E)
7 INSPECT IG2 RELAY
(a) Remove the IG2 relay from the engine room R/B No. 4.
(b) Check for continuity in the IG2 relay.
Standard:
Tester ConnectionSpecified Condition
1−2Continuity
3− 5No Continuity
3− 5Continuity
(Apply battery voltage to terminals 1 and 2)
(c) Reinstall the IG2 relay.
NG REPLACE IG2 RELAY
OK
8 CHECK HARNESS AND CONNECTOR(IG2 RELAY − IGNITION COIL)
(a) Disconnect the I 1, I2, I3 or I4 ignition coil connector.
(b) Remove the IG2 relay from the engine room R/B No. 4.
(c) Check the resistance between the wire harness side con-
nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
+B (I1−1 )− Engine room R/B No. 4 (IG2 relay terminal 3)Below 1

+B (I2 −1 )− Engine room R/B No. 4 (IG2 relay terminal 3)Below 1

+B (I3 −1 )− Engine room R/B No. 4 (IG2 relay terminal 3)Below 1

+B (I4 −1 )− Engine room R/B No. 4 (IG2 relay terminal 3)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
+B (I 1−1 ) or Engine room R/B No. 4 (IG2 relay terminal 3) −
Body ground1 0k
or higher
+B (I2 −1 ) or Engine room R/B No. 4 (IG2 relay terminal 3) −
Body ground1 0k
or higher
+B (I3 −1 ) or Engine room R/B No. 4 (IG2 relay terminal 3) −
Body ground1 0k
or higher
+B (I4 −1 ) or Engine room R/B No. 4 (IG2 relay terminal 3) −
Body ground1 0k
or higher
(d) Reconnect the ignition coil connector.
(e) Reinstall the IG2 relay.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK FOR FUEL PUMP CONTROL CIRCUIT (See page 05 −24 1)

05−164
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
DTC P0340 CAMSHAFT POSITION SENSOR ”A”
CIRCUIT (BANK1OR SINGLE SENSOR)
DTC P0341CAMSHAFT POSITION SENSOR ”A”
CIRCUIT RANGE/PERFORMANCE (BANK1
OR SINGLE SENSOR)
CIRCUIT DESCRIPTION
The Camshaft Position sensor (G2 signal), like the Crankshaft Position sensor, consists of a magnet and
an iron core wrapped in copper wire. The camshaft has 3 teeth and the Camshaft Position sensor is installed
so that it can detect these teeth passing by. When the camshaft rotates and the teeth pass by the Camshaft
Position sensor, the magnet on the Camshaft Position sensor creates a magnetic field and voltage is gener-
ated in the copper wire. When the crankshaft makes two rotation, voltage will be generated in the Camshaft
Position sensor 3 times.
The NE signal plate (crankshaft timing pulley) has 34 teeth and is installed to the crankshaft. The NE signal
sensor generates 34 signals at every engine revolution. Using the NE signal, the ECM detects both crank-
shaft angle and engine speed. In order to locate the top dead center position of the No.1cylinder, the ECM
uses the G2 and NE signals.
DTC No.DTC Detection ConditionTrouble Area
P0340
SNo camshaft position sensor (G2) signal to ECM during
cranking for 4 seconds or more (2 trip detection logic)
SNo camshaft position sensor (G2) signal to ECM at engine
speed of 600 rpm or more for 5 seconds or more
(1trip detection logic)SOpen or short in camshaft position sensor circuit
SCamshaft position sensor
SCamshaft timing gear
SJumped tooth of timing chain
SECM
P0341
While crankshaft rotates twice, camshaft position sensor (G2)
signal will be input to ECM12 times or more
(1trip detection logic)
SOpen or short in camshaft position sensor circuit
SCamshaft position sensor
SCamshaft timing gear
SJumped tooth of timing chain
SECM
HINT:
SDTC P0340 indicates a malfunction related to the camshaft position sensor (+) circuit.
(Wire harness [ECM−camshaft position sensor] and camshaft position sensor.)
SDTC P0341indicates a malfunction related to the camshaft position sensor (−) circuit.
(Wire harness [ECM−camshaft position sensor] and camshaft position sensor.)
05HIK−01