Vehicle Stability Control System

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C0210/33: Right Rear Wheel Speed Sensor Signal

DTC C0210/33 - Right Rear Wheel Speed Sensor Signal

DTC C0215/34 - Rear Speed Sensor LH Circuit

DTC C1238/38 - Foreign Object is Attached on Tip of Rear Speed Sensor RH

DTC C1239/39 - Foreign Object is Attached on Tip of Rear Speed Sensor LH

DESCRIPTION

Refer to DTCs C0200/31, C0205/32, C1235/35 and C1236/36 C0200.

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:
- DTC C0210/33 and C1238/38 are for the right rear speed sensor.
- DTC C0215/34 and C1239/39 are for the left rear speed sensor.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE ON TECHSTREAM (REAR SPEED SENSOR)
(a) Connect Techstream to the DLC3.
(b) Start the engine.
(c) Select the Data List mode on Techstream.

ABS / VSC / TRAC:

(d) Check that there is no difference between the speed value output from the speed sensor displayed by Techstream and the speed value displayed on the speedometer when driving the vehicle.
OK:
There is almost no difference in the displayed speed value.
HINT: There is tolerance of +- 10 % in the speedometer indication.

NG -- INSPECT REAR SPEED SENSOR
OK -- Continue to next step.
2. CHECK SPEED SENSOR AND SENSOR ROTOR SERRATIONS
(a) INSPECTION USING OSCILLOSCOPE:
(1) Connect the oscilloscope to terminals RR+ - RR- or RL+ - RL- of the skid control ECU.

(2) Drive the vehicle at approximately 19 mph (30 km/h), and check the signal waveform.
OK:
A waveform as shown in a figure should be output.
- As vehicle speed (wheel revolution speed) in creases, a cycle of the waveform narrows and the fluctuation in the output voltage becomes greater.
- hen noise is identified in the waveform on the oscilloscope, error signals are generated due to the speed sensor rotor's scratches, looseness or foreign matter attached to it.
NOTE: When replacing the brake actuator assembly, perform zero point calibration.

NG -- CHECK REAR SPEED SENSOR INSTALLATION
OK -- REPLACE BRAKE ACTUATOR ASSEMBLY
3. INSPECT REAR SPEED SENSOR
(a) 2WD
(1) Disconnect the skid control sensor connector.

(2) Measure the resistance according to the value(s) in the table below.
Standard resistance:
LH

(3) Measure the resistance according to the value(s) in the table below.
Standard resistance:
LH

NOTE: Check the speed sensor signal after replacement.
(b) 4WD
(1) Remove the seat cushion seatback.
(2) Disconnect the speed sensor connector.

(3) Measure the resistance according to the value(s) in the table below.
Standard resistance:
LH

(4) Measure the resistance according to the value(s) in the table below
Standard resistance:
LH

NOTE: Check the speed sensor signal after the replacement.

NG -- REPLACE REAR SPEED SENSOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (REAR SPEED SENSOR - SKID CONTROL ECU)
(a) Disconnect the skid control ECU connector and the skid control sensor connector.

(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
LH

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK SPEED SENSOR AND SENSOR ROTOR SERRATIONS
(a) INSPECTION USING OSCILLOSCOPE:
(1) Connect the oscilloscope to terminals RR+ - RR- or RL+ - RL- of the skid control ECU.

(2) Drive the vehicle at approximately 19 mph (30 km/h), and check the signal waveform.
OK:
A waveform as shown in a figure should be output.
- As the vehicle speed (wheel revolution speed) increases, a cycle of the waveform narrows and the fluctuation in the output voltage becomes greater.
- When noise is identified in the waveform on the oscilloscope, error signals are generated due to the speed sensor rotor's scratches, looseness or foreign matter attached to it.
NOTE: When replacing the brake actuator assembly, perform zero point calibration.

NG -- CHECK REAR SPEED SENSOR INSTALLATION
OK -- REPLACE BRAKE ACTUATOR ASSEMBLY
6. CHECK REAR SPEED SENSOR INSTALLATION
(a) 2WD

(1) Check the sensor installation.
OK:
There is no clearance between the sensor and rear axle carrier.
(b) 4WD

(1) Check the sensor installation.
OK:
There is no clearance between the sensor and rear axle carrier.
The installation bolt is tightened properly.
Torque: 8.0 Nm (82 kgf-cm, 71 in-lbf)
NOTE: Check the speed sensor signal after the replacement.

NG -- INSTALL REAR SPEED SENSOR CORRECTLY
OK -- Continue to next step.
7. CHECK SPEED SENSOR ROTOR
(a) Remove the rear axle hub and bearing, or rear drive shaft for 2WD, or Removal for 4WD).

(b) Check the sensor rotor serrations.
OK:
No scratches, missing teeth or foreign objects.
Result:

NOTE: Check the speed sensor signal after the replacement.

C -- REPLACE REAR DRIVE SHAFT ASSEMBLY (SPEED SENSOR ROTOR)
B -- REPLACE REAR AXLE HUB AND BEARING ASSEMBLY (SPEED SENSOR ROTOR)
A -- Continue to next step.
8. CHECK REAR SPEED SENSOR TIP
(a) Remove the rear speed sensor for 2WD or for 4WD).
(b) Check the sensor tip.
OK:
No scratches or foreign matter on the sensor tip.
NOTICE:
- Check the speed sensor signal after the replacement.
- When replacing the brake actuator assembly, perform zero point calibration.

NG -- CLEAN OR REPLACE REAR SPEED SENSOR
OK -- REPLACE BRAKE ACTUATOR ASSEMBLY