2005 TOYOTA AVENSIS diagnostic

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

A59781
A73303
Camshaft Position Sensor
C 1
Component Side:
Front View
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −1 65
AVENSIS Supplement (RM 1045E)
Reference: Inspection using the oscilloscope.
HINT:
The correct waveforms are as shown on the left.
ItemDetails
TerminalCH 1: G2+ − NE −
CH2: NE+ − NE −
Equipment Setting5 V/Division, 20 ms/Division
ConditionDuring Cranking or idling
WIRING DIAGRAM
Refer to DTC P0335 on page 05 −1 60.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the 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.
1 INSPECT CAMSHAFT POSITION SENSOR(RESISTANCE)
(a) Disconnect the C 1camshaft position sensor connector.
(b) Measure the resistance between the terminals of the camshaft position sensor.
Standard:
Tester ConnectionSpecified Condition
1−2835 to 1,400
at cold
1− 21,060 to 1,645
at hot
NOTICE:
The terms ”cold” and ”hot” refer to the temperature of the
coils. ”Cold” means approximately −10_Cto50 _C( 14 _Fto
1 22 _F). ”Hot” means approximately 50 _Cto 100 _C( 122 _F
to 2 12_F).
(c) Reconnect the camshaft position sensor connector.
NG REPLACE CAMSHAFT POSITION SENSOR
OK

1 2
A66 132
G+G −
Camshaft Position Sensor Connector
Wire Harness Side:
C 1
Front View
A8 1698
G2+ NE
−
ECM Connector E
11
05 −1 66
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM 1045E)
2 CHECK HARNESS AND CONNECTOR(ECM − CAMSHAFT POSITION SENSOR)
(a) Disconnect the C 1 camshaft position sensor connector.
(b) Disconnect the E 11 ECM connector.
(c) Check the resistance between the wire harness side con-
nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Camshaft position sensor (C 1−1 )− G2+ (E 11− 27)Below 1

Camshaft position sensor (C 1− 2)− NE − (E 11− 24)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Camshaft position sensor (C 1−1 ) or G2+ (E 11− 27)
− Body ground10k
or higher
Camshaft position sensor (C 1− 2) or NE − (E 11− 24)
− Body ground10k
or higher
(d) Reconnect the camshaft position sensor connector.
(e) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
3 CHECK SENSOR INSTALLATION(CAMSHAFT POSITION SENSOR)
(a) Inspect the camshaft position sensor installation. NG TIGHTEN SENSOR
OK
4 INSPECT CAMSHAFT
(a) Remove the camshafts (see page 14− 64).
(b) Check the camshaft lobes.
NG REPLACE CAMSHAFT (See Page14− 64)
OK
REPLACE ECM (See page 10− 65 of Pub. No. RM 1018E AVENSIS)

A59781
05−160
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
DTC P0335 CRANKSHAFT POSITION SENSOR ”A”
CIRCUIT
DTC P0339 CRANKSHAFT POSITION SENSOR ”A”
CIRCUIT INTERMITTENT
CIRCUIT DESCRIPTION
The crankshaft position sensor system consists of a crankshaft position sensor plate and a pick−up coil.
The sensor plate has 34 teeth and is installed on the crankshaft. The pick−up coil is made of an iron core
and magnet. The sensor plate rotates and as each tooth passes through the pick−up coil, a pulse signal is
created. The pick−up coil generates 34 signals for each engine revolution. Based on these signals, the ECM
calculates the crankshaft position and engine RPM. Using these calculations, the fuel injection time and igni-
tion timing are controlled.
DTC No.DTC Detection ConditionTrouble Area
P0335
(1) No crankshaft position sensor (NE) signal to ECM during
cranking for 3 seconds or more (2 trip detection logic)
(2) No crankshaft position sensor (NE) signal to ECM at engine
speed of 600 rpm or more (2 trip detection logic)SOpen or short in crankshaft position sensor circuit
SCrankshaft position sensor
SSignal plate (crankshaft position sensor plate No. 1)
SECM
P0339
No crankshaft position sensor signal to ECM for 0.05 second
or more, and conditions (a), (b) and (c) are met
(1 trip detection logic):
(a) Engine speed is 1,000 rpm or more
(b) STA signal is OFF
(c) 3 seconds or more has been lapsed after STA signal is
switched from ON to OFF
SOpen or short in crankshaft position sensor circuit
SCrankshaft position sensor
SSignal plate (crankshaft position sensor plate No. 1)
SECM
Reference: Inspection using the oscilloscope.
HINT:
The correct waveforms are as shown on the left.
ItemDetails
TerminalCH1: G2+−NE−
CH2: NE+−NE−
Equipment Setting5 V/Division, 20 ms/Division
ConditionDuring Cranking or idling
05HIJ−01

A83876
C1
Camshaft Position Sensor
C6
Crankshaft Position SensorR W
2 1
EE BR
G J12
J/CE1127ECM
G2+
NE+
NE− (Shielded)
R
BRE11
E1125
24
2 1
(Shielded)E E
E
R R
Crankshaft
Position
Sensor
Plate No. 1 Camshaft LH
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−161
AVENSIS Supplement (RM1045E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
SIf no trouble is found in troubleshooting of DTC P0335 troubleshoot the engine mechanical system.
SRead 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.
SRead value of hand−held tester
(a) Connect the hand−held tester to the DLC3.
(b) Start the engine and turn the hand−held tester ON.
(c) Select the item: DIAGNOSIS / OBD/MOBD / DATA LIST / ALL / ENGINE SPD.
The engine speed can be observed in DATA LIST using the hand−held tester. If there is no NE signals from
the crankshaft position sensor despite the engine revolving, the engine speed will be indicated as zero. If
voltage output from the crankshaft position sensor is insufficient, the engine speed will be indicated as lower
PRM (than the actual RPM).

A73303
Component Side:
Front View Crankshaft Position Sensor
C6
12
A66132
Wire Harness Side:
Front View Crankshaft Position Sensor Connector
C6
NE+
NE−
A81698
NE+NE−
ECM ConnectorE11
05−162
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
1INSPECT CRANKSHAFT POSITION SENSOR(RESISTANCE)
(a) Disconnect the C6 crankshaft position sensor connector.
(b) Measure the resistance between the terminals of the
crankshaft position sensor.
Standard:
Tester ConnectionSpecified Condition
1−2985 to 1,600
at cold
1−21,265 to 1,890
at hot
NOTICE:
The terms ”cold” and ”hot” refer to the temperature of the
coils. ”Cold” means approximately−10_Cto50_C(14_Fto
122_F). ”Hot” means approximately 50_Cto100_C(122_F
to 212_F).
(c) Reconnect the crankshaft position sensor connector.
NG REPLACE CRANKSHAFT POSITION SENSOR
OK
2 CHECK HARNESS AND CONNECTOR(ECM−CRANKSHAFT POSITION SENSOR)
(a) Disconnect the C6 crankshaft position sensor connector.
(b) Disconnect the E11 ECM connector.
(c) Check the resistance between the wire harness side con-
nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Crankshaft position sensor (C6−1)−NE+ (E11−25)Below 1

Crankshaft position sensor (C6−2)−NE−(E11−24)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Crankshaft position sensor (C6−1) or NE+ (E11−25)
−Body ground10 k
or higher
Crankshaft position sensor (C6−2) or NE−(E11−24)
−Body ground10 k
or higher
(d) Reconnect the crankshaft position sensor connector.
(e) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK

− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−163
AVENSIS Supplement (RM1045E)
3 CHECK SENSOR INSTALLATION(CRANKSHAFT POSITION SENSOR)
(a) Check the crankshaft position sensor installation.
NG TIGHTEN SENSOR
OK
4 INSPECT CRANKSHAFT POSITION SENSOR PLATE NO.1(TOOTH OF SIGNAL
PLATE)
(a) Remove the crankshaft position sensor plate No. 1.
(b) Check the teeth of the signal plate.
NG REPLACE CRANKSHAFT POSITION SENSOR
PLATE NO.1
OK
REPLACE ECM (See page10−65 of Pub. No. RM1018E AVENSIS)

A83343
KNK Signal Waveform 05−156
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
DTC P0325 KNOCK SENSOR1CIRCUIT (BANK1OR
SINGLE SENSOR)
DTC P0327 KNOCK SENSOR1CIRCUIT LOW INPUT
(BANK1OR SINGLE SENSOR)
DTC P0328 KNOCK SENSOR1CIRCUIT HIGH INPUT
(BANK1OR SINGLE SENSOR)
CIRCUIT DESCRIPTION
The flat type engine knock sensor (non−resonant type) has a structure that can detect vibration in a wide
frequency range, from about 6 kHz to15 kHz.
The sensor, located on the cylinder block, detects spark knock. When ”spark knock” occurs, the knock sen-
sor picks−up vibrates in a specific frequency range. When the ECM detects signal voltage in this frequency
range, it retards the ignition timing to suppress knocking. The ECM also senses background engine noise
with the knock sensor and uses this noise to check for faults in the sensor.
DTC No.DTC Detection ConditionTrouble Area
P0325Output voltage of the knock sensor decreases below a thresh-
old value (Threshold varies according to engine speeds)SKnock sensor
SKnock sensor (under−torqued or loose)
SECM
P0327Output voltage of the knock sensor is 0.5 V or less
SShort in knock sensor circuit
SKnock sensor
SECM
P0328Output voltage of the knock sensor is 4.5 V or more
SOpen in knock sensor circuit
SKnock sensor
SECM
HINT:
If the ECM detects any one of above conditions, it operates the fail−safe function in which the corrective
retard angle value is set to the maximum value.
Reference: Inspection using the oscilloscope.
HINT:
The correct waveform is as shown on the left.
ItemDetails
TerminalKNK1−EKNK
Equipment Settings0.01to10 V/ Division,
0.01to10 msec./ Division
ConditionAfter warming up the engine,
keep the engine speed at 4,000 rpm.
05CKI−02