Toyota RM787U, Руководство по обслуживанию и ремонту

Страница: 206 / 1976

DI6NX-02
BR3583
BR3582
F00010
Rotor
Speed Sensor
Magnet
To ECU
+V
-V
High Speed
Low Speed
Coil
N
S
- DIAGNOSTICS ABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-275
429
Author: Date:
2001 SIENNA (RM787U)
CIRCUIT INSPECTION
DTC
C0200 / 31 - C1331 / 36
Speed Sensor Circuit
DTC
C1332 / 38, C1333 / 39
Speed 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 Condition Trouble 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
Speed sensor rotor
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.