2001 TOYOTA AVALON check oil

- DIAGNOSTICSENGINE
DI-69
225 Author
: Date
:
2001 AVALON (RM808U)
DTC P0340 Camshaft Position Sensor Circuit Malfunc-
tion
CIRCUIT DESCRIPTION
Camshaft position sensor (G (VV) signal) consists of a magnet, iron core and pickup coil.
The G (VV) signal plate has 3 teeth, on its outer circumference and is installed the camshaft timing gear.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil change,
causing fluctuations in the magnetic field and generating an electromotive force in the pickup coil.
The NE signal plate has 34 teeth and is installed the crankshaft timing pulley. The NE signal sensor gener-
ates 34 signals at every engine revolution. The ECM detects the standard crankshaft angle based on the
G (VV) signal and the actual crankshaft angle and the engine speed by the NE signal.
DTC No.DTC Detecting ConditionTrouble Area
P0340
No camshaft position sensor signal to ECM during cranking (2
trip detection logic)
Open or short in camshaft position sensor circuit

Camshaft position sensor
P0340No camshaft position sensor signal to ECM with engine speed
600 rpm or more

Camshaft osition sensor

Camshaft timing gear

ECM
WIRING DIAGRAM
Refer to DTC P0335 on page DI-67.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the 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.
1 Check resistance of camshaft position sensor (See page IG-1).
Reference: INSPECTION USING OSCILLOSCOPE
Refer to DTC P0335 on page DI-67.
NG Replace camshaft position sensor.
OK
2 Check for open and short in harness and connector between ECM and camshaft
position sensor (See page IN-30).
NG Repair or replace harness or connector.
DI07V-09

A11669
14
3 2
B-R
L LG-B
L-Y
LG 1
4
2
43
21
43
21
43
21
43
2
Ignition Coil
with Igniter
No.2
No.3
No.4
No.5
No.6
Noise
Filter B-Y W-BB-W
GR
13 No.1B-W
B-W B-W B-W
B-WB-Y
B-Y B-Y B-Y B-Y B-Y
W-B
W-B
W-B
W-B W-B
1
B-W
B-WW-B
B-W
B-W
B-WW-B W-B W-B
B-W
W-BIGT1
IGF IGT2
IGT3
IGT4
IGT5
IGT6 11
12
13
14
15
16
25 E4
E4
E4
E4
E4
E4
E4ECM
Battery
EC ED
115
2B
B-O
2F 1C28
3
IG Switch72
14 IG2 Reray
2G
2C 2CIG2
AM2 72
1J B-O
7
6W-R
W-R4
IF1Engine Room J/B
Driver Side J/BB
Fusible
Link
Block
FL
Main 1F6 F7
B-W
1 B-Y
B-Y B-Y B-Y
W-B
DI-1 18
- DIAGNOSTICSENGINE
274 Author
: Date
:
2001 AVALON (RM808U)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:

If DTC P1300 is displayed, check No.1 ignition coil with igniter circuit.

If DTC P1305 is displayed, check No.2 ignition coil with igniter circuit.

If DTC P1310 is displayed, check No.3 ignition coil with igniter circuit.

If DTC P1315 is displayed, check No.4 ignition coil with igniter circuit.

If DTC P1320 is displayed, check No.5 ignition coil with igniter circuit.

If DTC P1325 is displayed, check No.6 ignition coil with igniter circuit.

If DTCs P1300, P1315 and P1325, are output simultaneously, IGF1 circuit may be open or short.

If DTCs P1305, P1310 and P1320, are output simultaneously, IGF2 circuit may be open or short.

Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the 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.
1 Check spark plug and spark (See page DI-58).

A02033
ON
IGF
(+) (-)
- DIAGNOSTICSENGINE
DI-1 19
275 Author
: Date
:
2001 AVALON (RM808U)
NG Go to step 4.
OK
2 Check for open and short in harness and connector in IGF and IGT signal cir-
cuits between ECM and ignition coil with igniter (See page IN-30).
NG Repair or replace harness or connector.
OK
3 Disconnect ignition coil with igniter connector, and check voltage between ter-
minals IGF of ECM connector and body ground.
PREPARATION:
(a) Remove the glove compartment (See page SF-83).
(b) Disconnect the ignition coil with the igniter connector.
(c) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals IGF of the ECM con-
nector and body ground.
OK:
Voltage: 4.5 - 5.5 V
OK Replace ignition coil with igniter.
NG
Check and replace ECM (See page IN-30).
4 Check for open and short in harness and connector in IGT signal circuit between
ECM and ignition coil with igniter (See page IN-30).
NG Repair or replace harness or connector.

A07629
ON
IGT1
IGT6IGT5IGT4
IGT2 IGT3
(+) (-)
A06097
IGT Signal Waveform5 V/
Division
IGT
GND
IGFGND
20 msec./ Division
A07629
ON
IGT1
IGT6IGT5IGT4
IGT2 IGT3
(+) (-)
DI-120
- DIAGNOSTICSENGINE
276 Author
: Date
:
2001 AVALON (RM808U)
OK
5 Check voltage between terminals IGT1 - IGT6 of ECM connector and body
ground.
PREPARATION:
(a) Remove the glove compartment (See page SF-83).
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals IGT1 - IGT6 of the
ECM connector and body ground when the engine is cranked.
OK:
Voltage: More than 0.1 V and less than 4.5 V
Reference: INSPECTION USING OSCILLOSCOPE
During cranking or idling, check the waveform between termi-
nals IGT1 - IGT6 and E1 of the ECM connector.
HINT:
Correct waveform appears as shown, with rectangle waves.
NG Check and replace ECM (See page IN-30).
OK
6 Disconnect ignition coil with igniter connector, and check voltage between ter-
minals IGT1 - IGT6 of ECM connector and body ground.
PREPARATION:
(a) Remove the glove compartment (See page SF-83).
(b) Disconnect the ignition coil with the igniter connector.
(c) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals IGT1 - IGT6 of the
ECM connector and body ground when the engine is cranked.
OK:
Voltage: More than 0.1 V and less than 4.5 V
NG Check and replace ECM (See page IN-30).
OK

BE6653A01761A01861
ON
START1
(+)
(-)
A11423
Engine Room J/B
IG2
Fuse
- DIAGNOSTICSENGINE
DI-121
277 Author
: Date
:
2001 AVALON (RM808U)
7 Check ignition coil with igniter power source circuit.
PREPARATION:
Disconnect the ignition coil with the igniter connector.
CHECK:
Measure the voltage between terminal 1 of the ignition coil with
the igniter connector and body ground when the ignition switch
is turned to ON and START position.
OK:
Voltage: 9 - 14 V
NG Repair ignition coil with igniter power source
circuit.
OK
8 Check for open and short in harness and connector between ignition switch and
ignition coil with igniter (See page IN-30).
NG Repair or replace harness or connector.
OK
9 Check IG2 fuse.
PREPARATION:
Remove the IG2 fuse from the engine room J/B.
CHECK:
Check the continuity of the IG2 fuse.
OK:
Continuity
NG Check for short in all harness and components
connected to IG2 fuse.
OK

A11423
Engine Room J/B
AM2
Fuse
DI-122
- DIAGNOSTICSENGINE
278 Author
: Date
:
2001 AVALON (RM808U)
10 Check AM2 fuse.
PREPARATION:
Remove the AM2 fuse from the engine room J/B.
CHECK:
Check the continuity of the AM2 fuse.
OK:
Continuity
NG Check for short in all harness and components
connected to AM2 fuse.
OK
11 Check ignition relay (Marking: IG2) (See page IG-10).
NG Replace ignition relay.
OK
Replace ignition coil with igniter.

A11663
VV1, VV2 and NE Signal Waveforms2 V
/Division
20 msec./Division (Idling)
VV1
NE VV2GND
GND
GND
DI-124
- DIAGNOSTICSENGINE
280 Author
: Date
:
2001 AVALON (RM808U)
DTC P1345 VVT Sensor/Camshaft Position Sensor Cir-
cuit Malfunction (Bank 1)
DTC P1350 VVT Sensor/Camshaft Position Sensor Cir-
cuit Malfunction (Bank 2)
CIRCUIT DESCRIPTION
VVT sensor (VV signal) consists of a magnet, iron core and pickup coil.
The VV signal plate has 3 teeth on its outer circumference and is installed the camshaft timing gear.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil change,
causing fluctuations in the magnetic field and generating an electromotive force in the pickup coil.
The actual camshaft angle is detected by the VVT sensor and it provides feedback to the ECM to control
the intake valve timing in response to during condition.
DTC No.DTC Detecting ConditionTrouble Area
No VVT sensor (Camshaft position sensor) signal to ECM
during cranking at 4 sec. or more

Open or short in VVT sensor (camshaft position sensor) cir-
P1345
P1350No VVT sensor (Camshaft position sensor) signal to ECM with
5 sec. or more engine speed 600 rpm or morecuit

VVT sensor (camshaft position sensor)

Camshaft timing gearP1350
While crankshaft rotates twice, VVT sensor (Camshaft position
sensor) signal will be input to ECM 5 times.
Camshaft timing gear

ECM
WIRING DIAGRAM
Refer to DTC P0335 on page DI-67.
INSPECTION PROCEDURE
HINT:

If DTC P1345 is displayed, check left bank VVT sensor (camshaft position sensor).

If DTC P1350 is displayed, check right bank VVT sensor (camshaft position sensor).

Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the 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.
1 Check resistance of VVT sensor (See page IG-7).
Reference: INSPECTION USING OSCILLOSCOPE
During idling, check the waveforms between terminals VV1 and
NE+, and VV2 and NE- of the ECM connector.
HINT:

The correct waveforms are as shown.

The waveform frequency is shortened as the engine
speed becomes higher.
NG Replace VVT sensor.
DI6T9-01

A07621A09776
Right Bank OCV
1
2R-B
RECM
OC1+
OC1-
OC2+
OC2- 29
18 Left Bank OCV
R-WR-L 1
2E46
5
E4
E4
E4
- DIAGNOSTICSENGINE
DI-127
283 Author
: Date
:
2001 AVALON (RM808U)
DTC P1349 VVT System Malfunction (Bank 1)
DTC P1354 VVT System Malfunction (Bank 2)
CIRCUIT DESCRIPTION
VVT system controls the intake valve timing to proper timing in response to driving condition.
ECM controls Oil Control Valve (OCV) to make the intake valve timing properly, and, oil pressure controlled
with OCV is supplied to the VVT controller, and then, VVT controller changes relative position between the
camshaft and the crankshaft.
DTC No.DTC Detecting ConditionTrouble Area
P1349
P1354
Condition (a) or (b) continues for after the engine is warmed up
and engine speed at 400 - 4,000 rpm:
(a) Valve timing does not change from of current valve timing
(b) Current valve timing is fixed
Valve timing

OCV

VVT controller assembly

ECM
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:

If DTC P1349 is displayed, check left bank VVT system circuit.

If DTC P1354 is displayed, check right bank VVT system circuit.

Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the 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.
DI6TB-01