Front Speed Sensor RH Circuit

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 C1271/71 - Low Output Signal of Front Speed Sensor RH (Test Mode DTC)

DTC C1272/72 - Low Output Signal of Front Speed Sensor LH (Test Mode DTC)

DESCRIPTION

The speed sensor detects the 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 Elements). The speed sensor rotor, which consists of 48 sets of N and S poles arranged in a circle, is integrated with the inner race of the hub bearing.
To detect the 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 forward or backward waveform to the ECU.
DTCs C1271/71 and C1272/72 will be deleted when the speed sensor sends a vehicle speed signal or when Test Mode ends. DTCs C1271/71 and C1272/72 are output only in Test Mode.

HINT:
- DTCs C0200/31 and C1271/71 are for the front speed sensor RH.
- DTCs C0205/32 and C1272/72 are for the front speed sensor LH.

WIRING DIAGRAM

INSPECTION PROCEDURE
NOTE:
When replacing the skid control ECU, perform zero point calibration and store system information Vehicle Stability Control System.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
(a) Using the Techstream, check for any momentary interruptions in the wire harness and connector corresponding to a DTC Check for Intermittent Problems.

ABS / VSC / TRAC

Result:

HINT: Perform the above inspection before removing the sensor and connector.

D -- CHECK FRONT SPEED SENSOR INSTALLATION
C -- CHECK FRONT SPEED SENSOR INSTALLATION
B -- READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR)
A -- Continue to next step.

2. REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR)
(a) Turn the engine switch off.
(b) Repair or replace the harness or connector.
(c) Check for any momentary interruption between the skid control ECU and the front speed sensor Check for Intermittent Problems.
(d) Check that there is no momentary interruption.
NEXT -- Continue to next step.

3. RECONFIRM DTC
(a) Turn the engine switch off.
(b) Clear the DTCs Vehicle Stability Control System.
(c) Start the engine.
(d) Drive the vehicle at the speed of 32 km/h (20 mph) or more for at least 60 seconds.
(e) Check if the same DTC is recorded Vehicle Stability Control System.
Result:

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

B -- END
A -- Continue to next step.

4. READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR)
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Start the engine.
(d) Select the Data List mode on the Techstream Data List / Active Test.

ABS / VSC / TRAC

(e) Check that there is no difference between the speed value output from the speed sensor displayed on the Techstream and the speed value displayed on the speedometer when driving the vehicle.
HINT: Factors that affect the indicated vehicle speed include tire size, tire inflation, and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using a speedometer tester (calibrated chassis dynamometer). For details about testing and the margin of error, see the reference chart Component Tests and General Diagnostics.

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

ABS / VSC / TRAC

(f) Check that the sensor signal conforms to the wheel rotation direction.
OK:
The correct wheel rotation direction is displayed.
Result:

C -- CHECK FRONT SPEED SENSOR INSTALLATION
B -- CHECK FRONT SPEED SENSOR INSTALLATION
A -- Continue to next step.

5. PERFORM TEST MODE (SIGNAL CHECK)
(a) Turn the engine switch off.
(b) Perform sensor check in Test Mode Procedure Test Mode Procedure.
OK:
All Test Mode DTCs are cleared.
Result:

C -- CHECK FRONT SPEED SENSOR INSTALLATION
B -- CHECK FRONT SPEED SENSOR INSTALLATION
A -- Continue to next step.

6. RECONFIRM DTC
(a) Turn the engine switch off.
(b) Clear the DTCs Vehicle Stability Control System.
(c) Start the engine.
(d) Drive the vehicle at the speed of 32 km/h (20 mph) or more for at least 60 seconds.
(e) Check if the same DTC is recorded Vehicle Stability Control System.
Result:

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

C -- REPLACE FRONT SPEED SENSOR
B -- REPLACE FRONT SPEED SENSOR AND FRONT SPEED SENSOR ROTOR
A -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)
7. CHECK FRONT SPEED SENSOR INSTALLATION

(a) Turn the engine switch off.
(b) Check the speed sensor installation.
OK:
There is no clearance between the sensor and the front steering knuckle.
NOTE:
Check the speed sensor signal after the installation Test Mode Procedure.

NG -- INSTALL FRONT SPEED SENSOR CORRECTLY
OK -- Continue to next step.

8. CHECK HARNESS AND CONNECTOR (SKID CONTROL SENSOR WIRE)
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

(b) Disconnect the skid control sensor wire.
(c) 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.

9. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR)

(a) Reconnect the skid control sensor wire.
(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(c) Disconnect the skid control ECU connector and 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 -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

10. INSPECT SKID CONTROL ECU (SENSOR INPUT)
(a) Reconnect the skid control ECU connector.

(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
for RH

for LH

NG -- REPLACE SKID CONTROL ECU
OK -- Continue to next step.

11. RECONFIRM DTC
(a) Turn the engine switch off.
(b) Reconnect the front speed sensor connector.
(c) Clear the DTCs Vehicle Stability Control System.
(d) Start the engine.
(e) Drive the vehicle at the speed of 32 km/h (20 mph) or more for at least 60 seconds.
(f) Check if the same DTC is recorded Vehicle Stability Control System.
Result:

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

B -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)
A -- Continue to next step.

12. REPLACE FRONT SPEED SENSOR AND FRONT SPEED SENSOR ROTOR
(a) Turn the engine switch off.
(b) Replace the front speed sensor Removal.
(c) Replace the front axle hub sub-assembly (front speed sensor rotor) Removal.
HINT: The front speed sensor rotor is incorporated into the front axle hub sub-assembly.
If the front speed sensor rotor needs to be replaced, replace it together with the front axle hub sub-assembly with front speed sensor.
NOTE:
Check the speed sensor signal after replacement Test Mode Procedure.

NEXT -- Continue to next step.

13. RECONFIRM DTC
(a) Clear the DTCs Vehicle Stability Control System.
(b) Start the engine.
(c) Drive the vehicle at the speed of 32 km/h (20 mph) or more for at least 60 seconds.
(d) Check if the same DTC is recorded Vehicle Stability Control System.
Result:

(a) Turn the engine switch off.
(b) Check the speed sensor installation.
OK:
There is no clearance between the sensor and the front steering knuckle.
The installation nut is tightened properly.
Torque
8.5 N*m (87 kgf*cm, 75 in.*lbf)
NOTE:
Check the speed sensor signal after the installation Test Mode Procedure.

NG -- INSTALL FRONT SPEED SENSOR CORRECTLY
OK -- Continue to next step.

15. CHECK FRONT SPEED SENSOR TIP
(a) Remove the front speed sensor Removal.
(b) Check the speed sensor tip.
OK:
No scratches, oil, or foreign matter on the sensor tip.
NOTE:
Check the speed sensor signal after cleaning or replacement Test Mode Procedure.

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

16. CHECK HARNESS AND CONNECTOR (SKID CONTROL SENSOR WIRE)
(a) Install the front speed sensor.

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(c) Disconnect the skid control sensor wire.
(d) 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.

17. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR)
(a) Reconnect the skid control sensor wire.

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(c) Disconnect the skid control ECU connector and 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 -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

18. INSPECT SKID CONTROL ECU (SENSOR INPUT)
(a) Reconnect the skid control ECU connector.

(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
for RH

for LH

NG -- REPLACE SKID CONTROL ECU
OK -- Continue to next step.

19. RECONFIRM DTC
(a) Turn the engine switch off.
(b) Reconnect the front speed sensor connector.
(c) Clear the DTCs Vehicle Stability Control System.
(d) Start the engine.
(e) Drive the vehicle at the speed of 32 km/h (20 mph) or more for at least 60 seconds.
(f) Check if the same DTC is recorded Vehicle Stability Control System.
Result:

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

B -- END
A -- Continue to next step.

22. REPLACE FRONT SPEED SENSOR ROTOR
(a) Turn the engine switch off.
(b) Replace the front axle hub sub-assembly (front speed sensor rotor) Removal.
HINT: The front speed sensor rotor is incorporated into the front axle hub sub-assembly.
If the front speed sensor rotor needs to be replaced, replace it together with the front axle hub sub-assembly.
NOTE:
Check the speed sensor signal after replacement Test Mode Procedure.

NEXT -- Continue to next step.

23. RECONFIRM DTC
(a) Clear the DTCs Vehicle Stability Control System.
(b) Start the engine.
(c) Drive the vehicle at the speed of 32 km/h (20 mph) or more for at least 60 seconds.
(d) Check if the same DTC is recorded Vehicle Stability Control System.
Result: