DESCRIPTION
The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to control the ABS control system. The front and rear rotors have 48 serrations each.
When the rotors rotate, the magnetic field emitted by the permanent magnet in the speed sensor generates 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 detect the speed of each wheel.
HINT:
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE ON INTELLIGENT TESTER (FRONT SPEED SENSOR)
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine.
(c) Select the DATA LIST mode on the intelligent tester.
ABS / VSC:
(d) Check that there is no difference between the speed value output from the speed sensor displayed on the intelligent tester and the speed value displayed on the speedometer when driving the vehicle.
OK: There is almost no difference from the displayed speed value.
HINT: There is tolerance of +- 10 % in the speedometer indication.
2 CHECK SPEED SENSOR AND SENSOR ROTOR SERRATIONS
(a) INSPECTION USING OSCILLOSCOPE
(1) Connect the oscilloscope to terminal FR+ and FRor FL+ and FL- of the skid control ECU.
(2) Drive the vehicle at about 19 mph (30 km/h), and check the signal waveform.
OK: A waveform as shown in a figure should be output.
HINT:
NOTICE: When replacing the brake actuator assembly, perform zero point calibration (See page BC-70).
REPLACE BRAKE ACTUATOR ASSEMBLY
3 INSPECT FRONT SPEED SENSOR
(a) Make sure that there is no looseness at the connectors' locking part and connecting part of connector.
(b) Disconnect the speed sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
LH
RH
(d) Measure the resistance according to the value(s) in the table below
Standard resistance:
LH
RH
NOTICE: Check the speed sensor signal after replacement (See page BC-72).
4 CHECK HARNESS AND CONNECTOR (FRONT SPEED SENSOR - SKID CONTROL ECU)
(a) Disconnect the skid control ECU connector and the front speed sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
LH
RH
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
LH
RH
5 CHECK SPEED SENSOR AND SENSOR ROTOR SERRATIONS
(a) INSPECTION USING OSCILLOSCOPE
(1) Connect the oscilloscope to terminal FR+ and FRor FL+ and FL- of the skid control ECU.
(2) Drive the vehicle at about 19 mph (30 km/h), and check the signal waveform.
OK: A waveform as shown in a figure should be output.
HINT:
NOTICE: When replacing the brake actuator assembly, perform zero point calibration (See page BC-70).
REPLACE BRAKE ACTUATOR ASSEMBLY
6 CHECK FRONT SPEED SENSOR INSTALLATION
(a) Check the speed sensor installation.
OK: The installation bolt is tightened properly. There is no clearance between the sensor and the front steering knuckle.
Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf)
NOTICE: Check the speed sensor signal after the replacement (See page BC-72).
7 CHECK FRONT SPEED SENSOR TIP
(a) Remove the front speed sensor (See page BC-187).
(b) Check the sensor tip.
OK: No scratches or foreign matter on the sensor tip.
NOTICE: Check the speed sensor signal after the replacement (See page BC-72).
8 CHECK SPEED SENSOR ROTOR
(a) Remove the front drive shaft (See page DS-5).
(b) Check the sensor rotor serrations.
OK: No scratches, missing teeth or foreign matter on the rotors.
HINT: If there is foreign matter in the rotor, remove it and check the output waveform after reassembly.
REPLACE BRAKE ACTUATOR ASSEMBLY
Console box
Press the tab.
Type A
Type B
Sliding the console box (type B)
From front
Press the tab and slide the console box.
From rear
Pull up the lever and slide the console
box.
Console box light
The console box light turns on when the headlight switch is on.
...
Initialization
1. RESET
Reset the power slide door system:
The power slide door ECU records the fully open
position of the power slide door in its memory and
the power slide door fully opens and closes based
on this memory. The power slide door cannot
operate without this memory. In the case wh ...
Reassembly
1. INSTALL CENTER SUPPORT BEARING ASSEMBLY NO.1
(a) Set the center support bearing assembly No. 1
(front) to the intermediate shaft, as shown in the
illustration.
(b) Install a new washer to the intermediate shaft.
NOTICE:
Be sure to install the bearing in the correct
direction.
(c ...