The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for the ABS control system. This speed sensor contains a sensor IC, which consists of 2 MREs (Magnetic Resistance Element). The speed sensor rotor, which consists of 48 sets of N and S poles that are arranged in a circle, is integrated with the inner race of the hub bearing.

To detect the rotation direction, the output waves are used to determine the relationship of the pulses that are generated by 2 MREs. Upon receiving this signal, the sensor IC outputs a forward or backward wave to the ECU.

DTCs C1273/73 and C1274/74 can be deleted when the speed sensor sends a vehicle speed signal or the Test Mode ends. DTCs C1273/73 and C1274/74 are output only in the Test Mode.

Dtc C0210/33 Rear Speed Sensor Rh Circuit. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

DTC No.	DTC Detection Condition	Trouble Area
C0210/33 C0215/34	When any of the following is detected: At a vehicle speed of 6 mph (10 km/h) or more, an open or short in the sensor signal circuit continues for 1 second or more. Momentary interruption of the sensor signal from the abnormal wheel occurs 255 times or more. An open in the speed sensor signal circuit continues for 0.5 seconds or more. When the vehicle is driven in reverse at the speed of 1.8 mph (3 km/h) or more and 3 of the wheel sensors detect the reverse signal, the other sensor detects a high frequency pulse 75 times while the engine switch is on (IG). At a vehicle speed of 6 mph (10 km/h) or more, the vehicle speed sensor output drops by 50 % for 5 seconds. At a vehicle speed of 6 mph (10 km/h) or more, the direction of wheel rotation changes 7 times in 0.006 seconds while the engine switch is on (IG). At a vehicle speed of 18 mph (30 km/h) or more, one wheel direction is different from the other 3 wheels' for 1 second. At a vehicle speed of 60 mph (100 km/h), a reverse signal is output for 1 second or more. At a vehicle speed of 18 mph (30 km/h) or more, the rotation direction of one of the wheels is not detected normally and the rotation direction of the other 3 wheels is not the same for 1 second. With the IG1 terminal voltage 9.5 V or more, the sensor power supply voltage decreases for 0.5 seconds or more. At a vehicle speed of 6 mph (10 km/h) or more, a condition where the speed of one wheel continues to be 1/7 or less of the other wheels for 15 seconds or more.	Rear speed sensor RH/LH Speed sensor circuit Speed sensor rotor Sensor installation Brake actuator assembly (Skid control ECU)

HINT:

DTC C0210/33 is for the rear speed sensor RH.

DTC C0205/32 is for the rear speed sensor LH.

WIRING DIAGRAM

Dtc C0210/33 Rear Speed Sensor Rh Circuit. BRAKE CONTROL. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

NOTICE:

When replacing the brake actuator assembly, perform zero point calibration .

1.CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

Using the intelligent tester, check for any momentary interruption in the wire harness and connector corresponding to a DTC .

ABS / VSC:
Item (Display)	Measurement Item / Range (Display)	Normal Condition
RR Speed Open	RR speed sensor open detection / ERROR or NORMAL	ERROR: Momentary interruption NORMAL: Normal
RL Speed Open	RL speed sensor open detection / ERROR or NORMAL	ERROR: Momentary interruption NORMAL: Normal

Result:
Condition Proceed to
There are no momentary interruptions A
There are momentary interruptions B
There is a constant open circuit C

HINT:

Perform the above inspection before removing the sensor and connector.

Go to step 13

Go to step 5

A

2.READ VALUE OF INTELLIGENT TESTER (REAR SPEED SENSOR)

Connect the intelligent tester to the DLC3.

Start the engine.

Select the Data List mode on the intelligent tester.

ABS / VSC:
Item (Display)	Measurement Item / Range (Display)	Normal Condition
RL Wheel Speed	RL wheel speed sensor reading / min.: 0 mph (0 km/h), max.: 202 mph (326 km/h)	Actual wheel speed
RR Wheel Speed	RR wheel speed sensor reading / min.: 0 mph (0 km/h), max.: 202 mph (326 km/h)	Actual wheel speed

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:
The speed value output from the speed sensor displayed on the intelligent tester is the same as the actual vehicle speed.

ABS / VSC:
Item (Display)	Measurement Item / Range (Display)	Normal Condition
RR Wheel Direction	RR wheel direction / FORWARD or BACK	FORWARD: Forward BACK: Back
RL Wheel Direction	RL wheel direction / FORWARD or BACK	FORWARD: Forward BACK: Back

Check that the sensor signal conforms to the wheel direction.

OK:
The wheel direction is displayed.

Go to step 5

OK

3.PERFORM TEST MODE (SIGNAL CHECK)

Perform sensor signal check in Test Mode Procedure .

OK:
All Test Mode DTCs are erased.

Go to step 5

OK

4.RECONFIRM DTC

Clear the DTC .

Start the engine.

Drive the vehicle at the speed of 20 mph (32 km/h) or more for at least 60 seconds.

Check if the same DTC is recorded .

Result:
Condition Proceed to
DTCs (C0210/33 and/or C0215/34) are not output A
DTCs (C0210/33 and/or C0215/34) are output B

HINT:

If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step .

Go to step 11

USE SIMULATION METHOD TO CHECK

5.CHECK REAR SPEED SENSOR INSTALLATION

Turn the engine switch off.

Check the speed sensor installation.

OK:
There is no clearance between the sensor and rear axle carrier.
The installation bolt is tightened properly.
Torque:
8.5 N*m (87 kgf*cm, 75 in.*lbf)

NOTICE:

Check the speed sensor signal after replacement .

Go to step 2

END

LEXUS IS250, IS220d / GSE20 ALE20

BRAKE CONTROL

Lexus IS250 IS220d GSE20 ALE20

VEHICLE STABILITY CONTROL SYSTEM w/o VDIM

Condition	Proceed to
There are no momentary interruptions	A
There are momentary interruptions	B
There is a constant open circuit	C