C0200

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C0200/31: Front Speed Sensor RH Circuit

DTC C0200/31 - Front Speed Sensor RH Circuit

DTC C0205/32 - Front Speed Sensor LH Circuit

DTC C1235/35 - Foreign Object is Attached on Tip of Front Speed Sensor RH

DTC C1236/36 - Foreign Object is Attached on Tip of Front Speed Sensor LH

DESCRIPTION

The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to control the ABS, BA, TRAC, A-TRAC, VSC, downhill assist control and hill-start assist control control systems. 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 skid control ECU.

HINT:
- DTC C0200/31 and C1235/35 are for the front speed sensor RH.
- DTC C0205/32 and C1236/36 are for the front speed sensor LH.

WIRING DIAGRAM

INSPECTION PROCEDURE
NOTE:
When replacing the master cylinder solenoid, perform zero point calibration Calibration.

PROCEDURE

1. READ VALUE USING TECHSTREAM (MOMENTARY INTERRUPTION OF FRONT SPEED SENSOR)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position and push Techstream main switch ON.
(c) Select "Data List" mode on Techstream.

ABS/VSC/TRAC

(d) Check for any momentary interruption in the wire harness and connector corresponding to a DTC Check for Intermittent Problems.
OK:
There are no momentary interruptions.
HINT: Perform the above inspection before removing the sensor and connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT SPEED SENSOR CIRCUIT)
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR)

ABS/VSC/TRAC

(a) Check that there is no difference between the speed value output from the speed sensor displayed on Techstream and the speed value displayed on the speedometer when driving the vehicle.
OK:
The speed value output from the speed sensor displayed on Techstream is the same as the actual vehicle speed.
NG -- INSPECT FRONT SPEED SENSOR INSTALLATION
OK -- Continue to next step.
3. PERFORM TEST MODE (SIGNAL CHECK)
(a) Check if test mode (signal check) DTCs are detected.
Result:

B -- RECONFIRM DTC
A -- Continue to next step.
4. INSPECT 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: 8.3 Nm (85 kgf-cm, 73 in-lbf)
NOTE:
Check the speed sensor signal after replacement Test Mode Procedure.

NG -- INSTALL FRONT SPEED SENSOR CORRECTLY
OK -- Continue to next step.
5. INSPECT SPEED SENSOR TIP
(a) Remove the front speed sensor Removal.
(b) Check the sensor tip.
OK:
No scratches or foreign matter on the sensor tip.
NOTE:
Check the speed sensor signal after cleaning/replacement Test Mode Procedure.

NG -- CLEAN OR REPLACE FRONT SPEED SENSOR
OK -- Continue to next step.
6. INSPECT FRONT SPEED SENSOR

(a) Install the front speed sensor.
(b) Turn the ignition switch off.
(c) Disconnect the front speed sensor connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:
RH

NG -- REPLACE FRONT SPEED SENSOR
OK -- Continue to next step.
7. INSPECT SKID CONTROL SENSOR WIRE

(a) Disconnect the skid control sensor wire.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
RH

NOTE:
Check the speed sensor signal after replacement Test Mode Procedure.

NG -- REPLACE SKID CONTROL SENSOR WIRE
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR)

(a) Disconnect the skid control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
RH

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. INSPECT MASTER CYLINDER SOLENOID (SKID CONTROL ECU OUTPUT VOLTAGE)

(a) Reconnect the skid control ECU connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
RH

NG -- REPLACE MASTER CYLINDER SOLENOID
OK -- Continue to next step.
10. RECONFIRM DTC
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Drive the vehicle at a speed of approximately 32 km/h (20 mph) or more for 60 seconds or more.
(c) Check if the same pending DTCs are detected Reading and Clearing Diagnostic Trouble Codes.
HINT: Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

Result:

C -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
B -- END
A -- Continue to next step.
11. REPLACE FRONT SPEED SENSOR
(a) Replace the front speed sensor Removal.
NOTE:
Check the speed sensor signal after replacement Test Mode Procedure.

NEXT -- Continue to next step.
12. RECONFIRM DTC
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Drive the vehicle at a speed of approximately 32 km/h (20 mph) or more for 60 seconds or more.
(c) Check if the same pending DTCs are detected Reading and Clearing Diagnostic Trouble Codes.
HINT: Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

Result:

B -- END
A -- Continue to next step.
13. INSPECT SPEED SENSOR ROTOR
(a) Remove the front axle with ABS rotor bearing assembly Removal.
(b) Check the sensor rotor.
OK:
No scratches, oil, or foreign matter on the rotors.
NOTE:
Check the speed sensor signal after cleaning/replacement Test Mode Procedure.

NG -- CLEAN OR REPLACE FRONT AXLE WITH ABS ROTOR BEARING ASSEMBLY (SPEED SENSOR ROTOR)
OK -- REPLACE MASTER CYLINDER SOLENOID