sensor TOYOTA AVALON 2001 Service Manual PDF

F09478
1
3
4
1
2
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-289
445 Author
: Date
:
2001 AVALON (RM808U)
3 Check yaw rate sensor.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals IGA (3) and
GYW2 (1), YAW2 (4) and GYW2 (1) of the yaw rate sensor
with connector still connected.
OK:
Terminals 3 and 1
(IGA - GYW2)Approx. 12 V
Terminals 4 and 1
(YAW2 - GYW2)Approx. 2.5 V
NG Replace yaw rate sensor.
OK
4 Check for open and short circuit in harness and connector between yaw rate
sensor and ABS & BA & TRAC & VSC ECU (See page IN-30).
NG Repair or replace harness or connector.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.

F09819
Translate ECU
SS2 SS1 RSS VSC- VSC+ T5
T5
T5
T5
T54
5
18 17
6W
O
BR
L
B-W
(Shielded)5
48
7 C11
Steering
Sensor
W-B R-B19 6
77
3B 3A 3A
3A(Shielded)
59
61
60
2 ABS & BA &
TRAC & VSC ECU
SS1
SS2
FSS
R+ A20
BR
GR-R
W-B
A
AJ5
J/C
W-B
IG J/B No. 3A20
A20
A20 DI-292
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
448 Author
: Date
:
DTC C1208 / 54 Steering Angle Sensor Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1208 / 54
Detection of any of conditions 1. through 7:
1. When the condition that ECU terminal IG1 voltage is 9.8
v or more, and does not receive data from steering angle
sensor continues for 0.1 sec. or more.
2. Sensor internal failure.
3. The offset value is out of range.
4. Sensor signal change higher.
5. Steering angle value difference between measured and
reference is out of range.
6. Steering sensor is not centered.
7. Steering sensor signal is out of range.

Steering angle sensor

Steering angle sensor circuit
WIRING DIAGRAM
DI6O4-01

- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-294
449 Author
: Date
:
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 steering angle 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 steering wheel turning angle value of the steering angle sensor displayed on the TOYOTA
hand-held tester is appropriate when turning the steering wheel.
OK:
Steering wheel turning angle value must be appropriate.
OK Go to step 4.
NG
2 Check the installation condition of steering angle sensor and adapter.
NG Repair or replace steering angle sensor (See
page SR-12).
OK
3 Check for open and short circuit in harness and connector between steering
angle sensor, translate ECU and ABS & BA & TRAC & VSC ECU (See page
IN-30).
NG Repair or replace harness or connector.
OK

DI-294
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
450 Author
: Date
:
4 Calibrate the steering angle sensor (See page DI-252).
NG Replace steering angle sensor.
OK
5 Is DTC still output?
Check DTC on page DI-252.
NO No problem.
YES
6 Replace steering angle sensor. Is DTC still output?
NOTICE:
When replacing the steering angle sensor, perform the zero point calibration (See page DI-252).
NO No problem.
YES
Replace skid control ECU.
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI-252).

- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-295
451 Author
: Date
:
2001 AVALON (RM808U)
DTCC1237 / 37 Wrong Number of Teeth at 1 of 4 Wheels
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1237 / 37
Detection of any of conditions from 1. through 4.:
1. When the ignition switch is ON, the speed difference
between the rear right and rear left wheels is 5 km/h
(3mph) or more (vehicle speed: 100 km/h (62 mph) or
less).
2. When the ignition switch is ON, the slip difference be-
tween the reference wheel and any other wheels is 6 %
or more (vehicle speed: 100 km/h (62 mph) or more).
3. Continuous ABS control for 60 sec. or more.
4. Interference on 1 or more wheels for 20 sec. with the
brake pedal depressed, or for 5 sec. when the brake
pedal is not depressed.

Tire size

Speed sensor rotor
INSPECTION PROCEDURE
1 Check tire size.
NG Replace tires so that all 4 tires are the same in
size.
OK
2 Check sensor rotor (See page DI-267).
NG Replace speed sensor rotor.
OK
3 Check speed sensor (See page DI-267).
NG Replace speed sensor.
OK
DI6O5-01

DI-296
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
452 Author
: Date
:
2001 AVALON (RM808U)
4 Check for open and short circuit in harness and connector between front speed
sensor, rear speed 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.

F09812
M2 Master Cylinder
Pressure SensorABS & BA &
TRAC & VSC ECU
VCM
E2 PMC
123
VCM
PMC
E2IF3
A20 A20A2065
66
67 IF3 IF3
29 8
P-L
R-L
BR-YP-L
R-L
BR-Y DI-300
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
456 Author
: Date
:
2001 AVALON (RM808U)
DTCC1246 / 53Master Cylinder Pressure Sensor Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1246 / 53
When any of the following 1. through 3. is detected:
1. The voltage of sensor signal is out of range (less than
0.25 V, more than 4.75 V).
2. The sensor supply voltage is out of range (above 5.6 V,
below 4.4 V).
3. The sensor signal offset value is out of range.

Master cylinder pressure sensor

Master cylinder pressure sensor circuit
WIRING DIAGRAM
DI6O7-02

F07902
PMCE2
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-301
457 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 master cylinder pressure 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 brake fluid pressure value of the master cylinder pressure sensor displayed on the TOYOTA
hand-held tester is changing when depressing the brake pedal.
OK:
Brake fluid pressure value must be changing.
OK Go to step 4.
NG
2 Check master cylinder pressure sensor.
PREPARATION:
Install LSPV gauge to the front caliper bleeder plug portion, and
bleed the air from LSPV gauge.
SST 09709-29018
CHECK:
Start the engine and depress the brake pedal, then check the
relation between the fluid pressure and voltage of PMC and E2
terminals of the master cylinder pressure sensor with connector
still connected.
OK:
Front brake caliper fluid pressureVoltage
0 kPa (0 Kgf/cm2, 0 psi)0.44 - 0.76 V
5,883 kPa (60 kgf/cm2, 853 psi)1.34 - 1.66 V
11,768 kPa (120 kgf/cm2, 1,706 psi)2.24 - 2.56 V
HINT:
Voltage between terminals VCM and E2: 4.7 - 5.3 V
NG Replace master cylinder pressure sensor.
OK

DI-302
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
458 Author
: Date
:
2001 AVALON (RM808U)
3 Check for open and short circuit in harness and connector between master cyl-
inder pressure sensor and ABS & BA & TRAC & VSC ECU (See page IN-30).
NG Repair or replace harness or connector.
OK
4 Check whether or not the ECU terminal STP input voltage is changed when the
stop light switch is turned on and off.
NO Check the stop light switch circuit (See page
BE-36).
YES
Check and replace ABS & BA & TRAC & VSC
ECU.

F09817
ABS & BA & TRAC
& VSC ECU
48
A20
STP
ALTJ/B No. 3
FL Block
FL MAIN
Battery Driver Side J/B
S4
Stop Light SwitchG-W
STOP
L5
Light Failure SensorR8
Rear Combination
Light RH
G-R
J12
J/C J/B No. 4
16
4D 16
4F 3
3F 3
3C 5
1B 3
1D
4 1E
5IK1
7 12R
Driver Side J/B
11
1D 1
1G W
1
F101
F6B2
G-R W-B BB
B3
6
C Stop R7
Rear Combination
Light LH
3
6 Stop
1 R-W
W-B H11
High Mounted
Stop Light
21
C
C
W-B
BM G-R W-B G-W G-W
G-W
G-W
G-W
J12
J/C
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-303
459 Author
: Date
:
2001 AVALON (RM808U)
DTC C1249 / 58 Stop Light Switch Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1249 / 58
After the ignition switch is turned ON, the condition that the
STP terminal voltage of ECU is 55 % to 75 % of supplied
voltage, continues for 1 sec. or more.
Stop light switch

Stop light switch circuit
WIRING DIAGRAM
DI6O8-03