Front Speed Sensor RH Circuit - Vehicle Stability Control System
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, AUTO LSD, downhill assist and hill-start assist 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 the 2 MREs. Upon receiving this signal, the sensor IC outputs a signal indicating forward or reverse rotation to the 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 Programming and Relearning.
PROCEDURE
1. READ VALUE USING TECHSTREAM (MOMENTARY INTERRUPTION OF FRONT SPEED SENSOR)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream main switch ON.
(c) Select "Data List" mode on the 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 (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 displayed on the Techstream and the speed value displayed on the speedometer when driving the vehicle.
OK:
The speed value displayed on the 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:
for RH
for LH
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:
for RH
for LH
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:
for RH
for LH
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. INSPECT MASTER CYLINDER SOLENOID
(a) Reconnect the skid control ECU connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
for RH
for LH
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:
B -- CHECK FOR INTERMITTENT PROBLEMS
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 for 2WD, or Removal for 4WD).
(b) Check the sensor rotor.
OK:
No scratches, oil, or foreign matter on the rotor.
NOTE: Check the speed sensor signal after cleaning/replacement Test Mode Procedure.
NG -- CLEAN OR REPLACE FRONT AXLE ABS ROTOR BEARING ASSEMBLY (SPEED SENSOR ROTOR)
OK -- REPLACE MASTER CYLINDER SOLENOID