C1276
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
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)
DTC C1275/75 - Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC)
DTC C1276/76 - Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC)
DESCRIPTION
The speed sensors detect the wheel speeds and send appropriate signals to the skid control ECU. Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change as the rotors turn.
The speed sensors detect those magnetic changes and send pulse signals to the skid control ECU. The ECU monitors the wheel speeds through these pulse signals to control the ABS system.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
- When replacing the master cylinder solenoid, perform zero point calibration Programming and Relearning.
- Check the speed sensor signal in test mode after clearing or replacement Test Mode Procedure.
PROCEDURE
1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester on.
(d) Using the Techstream, check for any momentary interruption in the wire harness and connector of the speed sensor.
Select the following menu items: Chassis / ABS/VSC/TRAC/ Data List
DATA LIST: ABS/VSC/TRAC
OK:
There are no momentary interruptions.
HINT: Perform the above inspection before removing the sensor and connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. READ VALUE USING DATA LIST (FRONT SPEED SENSOR)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester on.
(d) Select the following menu items: Chassis / ABS/VSC/TRAC/ Data List
DATA LIST: ABS/VSC/TRAC
(e) Check that there is no significant difference between the speed value displayed on the Techstream and the speed value displayed on the speedometer when driving the vehicle.
OK:
There is almost no difference in the displayed speed values.
HINT: There is a tolerance of +- 10% in the speedometer indication.
NG -- CHECK FRONT SPEED SENSOR INSTALLATION
OK -- Continue to next step.
3. PERFORM TEST MODE INSPECTION (SIGNAL CHECK)
(a) Perform a TEST MODE inspection and check for DTCs Test Mode Procedure.
OK:
No DTC output.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. RECONFIRM DTC
(a) Clear the DTC(s) Reading and Clearing Diagnostic Trouble Codes.
(b) Start the engine.
(c) Drive the vehicle at a speed of 12 mph (20 km/h) or more for at least 60 seconds.
(d) Check if the same DTC(s) is output Reading and Clearing Diagnostic Trouble Codes.
Result:
B -- REPLACE FRONT SPEED SENSOR
A -- END
5. CHECK FRONT SPEED SENSOR INSTALLATION
(a) Check that the speed sensor installation bolt is tightened properly.
OK:
The installation bolt is tightened properly.
Torque: 8.0 Nm (82 kgf-cm, 72 in-lbf)
NG -- TIGHTEN BOLT PROPERLY
OK -- Continue to next step.
6. CHECK FRONT SPEED SENSOR
(a) Visually check the speed sensor for deformation and damage.
OK:
No scratches or foreign matter on the speed sensor tip.
No deformation or damage.
There is no gap between the sensor and steering knuckle.
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.
Standard resistance (LH):
Standard resistance (RH):
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 and the front speed sensor connector.
(b) Measure the resistance.
Standard resistance (LH):
Standard resistance (RH):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. INSPECT FRONT SPEED SENSOR (INPUT VOLTAGE)
(a) Disconnect the speed sensor connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage.
Standard voltage (LH):
Standard voltage (RH):
NG -- REPLACE MASTER CYLINDER SOLENOID
OK -- Continue to next step.
10. RECONFIRM DTC
(a) Clear the DTC(s) Reading and Clearing Diagnostic Trouble Codes.
(b) Start the engine.
(c) Drive the vehicle at a speed of 12 mph (20 km/h) or more for at least 60 seconds.
(d) Check if the same DTC(s) is output Reading and Clearing Diagnostic Trouble Codes.
Result:
B -- END
A -- Continue to next step.
11. REPLACE FRONT SPEED SENSOR
(a) Replace the front speed sensor Removal.
NEXT -- Continue to next step.
12. RECONFIRM DTC
(a) Clear the DTC(s) Reading and Clearing Diagnostic Trouble Codes.
(b) Start the engine.
(c) Drive the vehicle at a speed of 12 mph (20 km/h) or more for at least 60 seconds.
(d) Check if the same DTC(s) is output Reading and Clearing Diagnostic Trouble Codes.
Result:
B -- END
A -- REPLACE MASTER CYLINDER SOLENOID