sensor TOYOTA AVALON 2001 Service Manual PDF

DI6NX-03
BR3583
BR3582F00010
RotorSpeed Sensor
Magnet
To ECU
+V
-VHigh Speed
Low Speed
CoilNS
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-267
423 Author
: Date
:
2001 AVALON (RM808U)
CIRCUIT INSPECTION
DTC
C0200 / 31 - C1331 / 36Speed Sensor Circuit
DTC
C1332 / 38, C1333 / 39Speed Sensor Circuit
CIRCUIT DESCRIPTION
The speed sensor detects a wheel speed and sends the ap-
propriate signals to the ECU. These signals are used to control
of the ABS and VSC system. Each of the front and rear rotors
has 48 serrations.
When the rotors rotate, a magnetic field emitted by a permanent
magnet in the speed sensor generates an AC voltage. Since
the frequency of this AC voltage changes in direct proportion to
the speed of the rotor, the frequency is used by the ECU to de-
tect the speed of each wheel.

DTC No.DTC Detecting ConditionTrouble Area
C0200 / 31
C0205 / 32
C0210 / 33
C0215 / 34
When any of the following 1. to 3. is detected :
1. Vehicle speed is more than 40 km/h (25 mph), pulses
are not input for 0.01 sec.
2. After the initial start or restart and when the vehicle
speed has reached 12 km/h (7 mph), the wheel speed of
0 km/h (0 mph) is detected.
3. After the initial start or restart and when the vehicle
speed has reached 18 km/h (11 mph), the front wheel
speed of 0 km/h (0 mph) is detected.

Right front, left front, right rear, left rear speed sensor

Each speed sensor circuit

Sensor installation
C1330 / 35
C1331 / 36
C1332 / 38
C1333 / 39
Detecting abnormality in the resistance value of each speed
sensor.
Right front, left front, right rear, left rear speed sensor

Each speed sensor circuit
HINT:

DTC No. C0200 / 31 and C1330 / 35 are for the right front speed sensor.

DTC No. C0205 / 32 and C1331 / 36 are for the left front speed sensor.

DTC No. C0210 / 33 and C1332 / 38 are for the right rear speed sensor.

DTC No. C0215 / 34 and C1333 / 39 are for the left rear speed sensor.

F09825
(Shielded)
FR-
2
IE1A2016
BR B-W
J4
J/C (Shielded) 1
A9
Right Front
Speed Sensor
19
IE1 18
IE120
BR-W
A
AA
A
BR
(Shielded)ABS & BA & TRAC
& VSC ECU
FR+ A2017
FL-
A2010
FL+ A208 L
B-R
BR (Shielded)
B-R
BR
2 1
A8
Left Front
Speed Sensor
A
(Shielded)RR-
A2012
RR+ A2011
RL-
A2014
RL+ A2013 V
LG
(Shielded) V
LG
(Shielded)Y
GIK110
IK1 11
IK112Y
G
ID111
ID1 21
ID122 2
1 A30
Right
Rear
Speed
Sensor
2
1 A29
Left
Rear
Speed
Sensor
IGBR
BR-W DI-268
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
424 Author
: Date
:
2001 AVALON (RM808U)
WIRING DIAGRAM

R14205
1
2
R14213
1
2
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-269
425 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check speed sensor.
Front:
PREPARATION:
(a) Remove the front fender liner.
(b) Disconnect the speed sensor connector.
CHECK:
Measure the resistance between terminals 1 and 2 of speed
sensor connector.
OK:
Resistance: 0.6 - 2.5 kW (1.6 ± 0.2 kW at 20 °C)
CHECK:
Measure the resistance between terminals 1 and 2 of speed
sensor connector and body ground.
OK:
Resistance: 1 MW or higher
Rear:
PREPARATION:
(a) Remove the seat cushion and seatback.
(b) Disconnect the speed sensor connector.
CHECK:
Measure the resistance between terminals 1 and 2 of speed
sensor connector.
OK:
Resistance: 1.2 - 2.3 kW (1.6 ± 0.1 kW at 20 °C)
CHECK:
Measure the resistance between terminals 1 and 2 of speed
sensor connector and body ground.
OK:
Resistance: 1 MW or higher
NG Replace speed sensor.
NOTICE:
Check the speed sensor signal last (See page DI-252).
OK

BR3795
OK NG OK NG
OK NGOK NG
DI-270
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
426 Author
: Date
:
2001 AVALON (RM808U)
2 Check for open and short circuit in harness and connector between each speed
sensor and ABS & BA & TRAC & VSC ECU (See page IN-30).
NG Repair or replace harness or connector.
OK
3 Check speed sensor installation.
CHECK:
Check the speed sensor installation.
OK:
The installation bolt shall be tightened properly and
no clearance is allowed between the sensor and front
steering knuckle or rear axle carrier.
NG Replace speed sensor.
NOTICE:
Check the speed sensor signal last (See page DI-252).
OK

W04200
Normal Signal Waveform
2 m/s / DivisionGND
1 V / Division
R00948
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-271
427 Author
: Date
:
2001 AVALON (RM808U)
4 Check speed sensor and sensor rotor serrations.
REFERENCE: INSPECTION USING OSCILLOSCOPE
PREPARATION:
(a) Disconnect the connector from the ABS & BA & TRAC &
VSC ECU.
(b) Connect the oscilloscope to the terminals FR+, FL+, RR+
or RL+ and GND of the ECU harness side connector.
CHECK:
Drive the vehicle at about 30 km/h (19 mph), and check the sig-
nal waveform.
OK Check and replace ABS & BA & TRAC & VSC
ECU.
NG
5 Check sensor rotor and sensor tip.
Front:
PREPARATION:
Remove the front drive shaft (See page SA-16).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches, missing teeth or foreign objects.
PREPARATION:
Remove the front speed sensor (See page BR-60).
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.

R00947
DI-272
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
428 Author
: Date
:
2001 AVALON (RM808U)
Rear:
PREPARATION:
Remove the axle hub (See page SA-45).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches, missing teeth or foreign objects.
PREPARATION:
Remove the rear speed sensor (See page BR-63).
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.
NG Replace sensor rotor or speed sensor.
NOTICE:
Check the speed sensor signal last (See page DI-252).
OK
Check and replace ABS & BA & TRAC & VSC
ECU.

F09813
Deceleration Sensor
IGA
GNDA
GL1(Shielded)
34
18YGNA
GL1 YIGA
A2078 13
AR
A20
A20ABS & BA & TRAC
& VSC ECU
(Shielded)
W
G ID1
14
ID1
16
ID1
15
ID1 BRBR-W
BR
BR3
Y1
6
Y1
5
Y1
IG
J4
J/CAR
W
G
BR-W
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-285
441 Author
: Date
:
2001 AVALON (RM808U)
DTC C0365 / 43 Deceleration Sensor Circuit
CIRCUIT DESCRIPTION
Deceleration sensor is combined with yaw rate sensor.
DTC No.DTC Detecting ConditionTrouble Area
C0365 / 43
Detection of any of conditions from 1. through 4.:
1. The sensor signal is out of range, less than 0.25 V or
more than 4.75 V.
2. Deceleration difference between sensor signal and refer-
ence value is large.
3. Offset value of sensor signal is higher than the standard
value.
4. sensor signal change rapidly higher than the value at the
normal condition.

Deceleration sensor

Deceleration sensor circuit
WIRING DIAGRAM
DI6O1-03

DI-286
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
442 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the TOYOTA hand-held tester and start from step 2 in case
of not using the TOYOTA hand-held tester.
1 Check output value of the deceleration sensor.
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON.
(c) Select the DATALIST mode on the TOYOTA hand-held tester.
CHECK:
Check that the deceleration value of the deceleration sensor displayed on the TOYOTA hand-held tester
is changing when tilting the vehicle.
OK:
Deceleration value must be changing.
OK Check and replace ABS & BA & TRAC & VSC
ECU.
NG
2 Check deceleration sensor (See page DI-252).
NG Replace deceleration sensor.
OK
3 Check for open or short circuit in harness and connector between deceleration
sensor and ABS & BA & TRAC & VSC ECU (See page IN-30).
NG Repair or replace harness and connector.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.

F09813
Yaw Rate Sensor
YD
GYW2
YAW 2(Shielded)
75
77GYAW
YAWYD
A2076 1
ABR
A20
A20ABS & BA & TRAC
& VSC ECU
(Shielded)
Y
L BR
Y
LID1
2
ID1
12
ID1
15
ID1 BR
BR-W
BR
BR2
Y1
1
Y1
4
Y1
IGJ4
J/C
ABR-W
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-287
443 Author
: Date
:
2001 AVALON (RM808U)
DTC C0371 / 55 Yaw Rate Sensor Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C0371 / 55
Detection of any of conditions from 1. through 4.:
1. The voltage of sensor signal is out of range.
2. The offset value of sensor signal is outside the plausible
range.
3. Sensor signal change rapidly under normal driving.
4. Sensor is more or worse sensitivity than reference yaw
rate during cornering.

Yaw rate sensor

Yaw rate sensor circuit
WIRING DIAGRAM
DI6O2-03

F07893
DI-288
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
444 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the TOYOTA hand-held tester and start from step 2 in case
of not using the TOYOTA hand-held tester.
1 Check output value of the yaw rate sensor.
PREPARATION:
(a) Remove the 2 bolts and yaw rate sensor with connector
still connected.
(b) Connect the TOYOTA hand-held tester to the DLC3.
(c) Turn the ignition switch ON and push the TOYOTA hand-
held tester main switch ON.
(d) Select the DATALIST mode on the TOYOTA hand-held
tester.
CHECK:
Check that the yaw rate value of the yaw rate sensor displayed
on the TOYOTA hand-held tester is changing: Place the yaw
rate sensor vertically to the ground and turn the sensor pivoted
on its center.
OK:
Yaw rate value must be changing.
OK Go to step 3.
NG
2 Check whether continuity exists between terminal YD of yaw rate sensor and ter-
minal YD of ABS & BA & TRAC & VSC ECU.
NG Repair or replace harness or connector.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.