Dtc C1275 Abnormal Change In Output Signal Of Front Speed Sensor Rh (Test Mode Dtc)

Brake. Yaris. Ncp93, 131
Brake Control Dynamic Control Systems. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR)

PERFORM TEST MODE (SIGNAL CHECK)

RECONFIRM DTC

CHECK FRONT SPEED SENSOR INSTALLATION

INSPECT FRONT SPEED SENSOR TIP

INSPECT FRONT SPEED SENSOR ROTOR

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

INSPECT BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (SENSOR INPUT)

RECONFIRM DTC

REPLACE FRONT SPEED SENSOR

RECONFIRM DTC

DTC C1275 Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC)

DTC C1276 Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC)

DTC C1413 Front Speed Sensor RH Output Malfunction

DTC C1414 Front Speed Sensor LH Output Malfunction


DESCRIPTION

Refer to DTCs C1401 and C1402 (YARIS_NCP93 RM000000XI90KBX.html).

DTC No.
DTC Detection Condition
Trouble Area
C1413
C1414
Any of the following is detected:
  1. An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more.
  2. At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds.
  3. At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.
  1. Front speed sensor RH/LH
  2. Speed sensor circuit
  3. Speed sensor rotor
  4. Skid control ECU (Brake actuator assembly)
C1275
C1276
Detected only during Test Mode.
  1. Front speed sensor RH/LH
  2. Speed sensor rotor
HINT:
  1. DTC C1413 and C1275 are for the front speed sensor RH.
  2. DTC C1414 and C1276 are for the front speed sensor LH.

WIRING DIAGRAM

Refer to DTCs C1401 and C1402 (YARIS_NCP93 RM000000XI90KBX_02.html).

INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

  1. Using the Techstream, check for any momentary interruption in the wire harness and connector corresponding to the DTC (YARIS_NCP93 RM000000XHS0AMX.html).

    ABS/VSC/TRAC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    FR Speed Open
    		FR speed sensor open detection / Normal or Error
    		Normal: Normal
    Error: Momentary interruption
    		-
    FL Speed Open
    		FL speed sensor open detection / Normal or Error
    		Normal: Normal
    Error: Momentary interruption
    		-
    OK:
    There are no momentary interruptions.
    HINT:
    Perform the above inspection before removing the sensor and connector.


NG
Go to step 8
OK


2.READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR)

  1. Connect the Techstream to the DLC3.

  1. Start the engine.

  1. Turn the Techstream on.

  1. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.

    ABS/VSC/TRAC (Skid Control ECU)
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    FR Wheel Speed
    		FR wheel speed sensor reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph)
    		Vehicle stopped: 0 km/h
    		When driving at constant speed: No large fluctuations
    FL Wheel Speed
    		FL wheel speed sensor reading /min.: 0 km/h (0 mph), max.: 326 km/h (202 mph)
    		Vehicle stopped: 0 km/h
    		When driving at constant speed: No large fluctuations

  1. 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 (YARIS_NCP93 RM0000014WB073X.html).
    OK:
    The speed value output from the speed sensor displayed on the Techstream is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).
    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (YARIS_NCP93 RM000000XHN0BQX.html).
Result
Result
Proceed to
NG
A
OK
B


NG
Go to step 5
OK


3.PERFORM TEST MODE (SIGNAL CHECK)

  1. Turn the ignition switch off.

  1. Perform the sensor check in the Test Mode procedure (YARIS_NCP93 RM000000XHT097X.html).

    OK:
    All Test Mode DTCs are cleared.


NG
Go to step 5
OK


4.RECONFIRM DTC

  1. Clear the DTCs (YARIS_NCP93 RM000000XHV0CPX.html).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

  1. Check if the same DTC is recorded (YARIS_NCP93 RM000000XHV0CPX.html).

Result
Result
Proceed to
DTCs C1413 and C1414 are not output
A
DTCs C1413 and/or C1414 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 (YARIS_NCP93 RM000000XHN0BQX.html).


B
Go to step 11
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (YARIS_NCP93 RM000000XHS0AMX.html)

5.CHECK FRONT SPEED SENSOR INSTALLATION

  1. Turn the ignition switch off.



    Yaris. Ncp93, 131.Brake Control Dynamic Control Systems.Anti-Lock Brake System (For Sedan). Dtc C1275 Abnormal Change In Output Signal Of Front Speed Sensor Rh (Test Mode Dtc)

  1. Check the speed sensor installation.

    OK:
    There is no clearance between the sensor and the front steering knuckle.
    The installation bolt is tightened properly.
    Torque:
    8.5 N*m (87 kgf*cm, 75 in.*lbf)
Text in Illustration
*a
Normal
*b
Abnormal
*c
Clearance


NG
INSTALL FRONT SPEED SENSOR CORRECTLY (YARIS_NCP93 RM000001BXU01LX.html)
OK


6.INSPECT FRONT SPEED SENSOR TIP

  1. Remove the front speed sensor (YARIS_NCP93 RM000001BXX01FX.html).

  1. Check the speed sensor tip.

    OK:
    No scratches, oil, or foreign matter on the sensor tip.
    NOTICE:
    1. If there is iron powder sticking to the rotor, this will result in a malfunction, so confirm that the rotor is not contaminated with foreign material before replacing the sensor.
    2. Check the speed sensor signal after cleaning or replacement (YARIS_NCP93 RM000000XHT097X.html).

  1. Reinstall the front speed sensor (YARIS_NCP93 RM000001BXU01LX.html)



NG
CLEAN OR REPLACE FRONT SPEED SENSOR
OK


7.INSPECT FRONT SPEED SENSOR ROTOR

  1. Remove the front speed sensor and the front axle hub sub-assembly (YARIS_NCP93 RM000001IWN01EX.html).

  1. Check the speed sensor rotor.

    OK:
    No scratches, oil, or foreign matter on the rotors.
    NOTICE:
    Check the speed sensor signal after cleaning or replacement (YARIS_NCP93 RM000000XHT097X.html).
    HINT:
    If the front axle hub sub-assembly needs to be replaced, replace it together with the front drive outboard joint shaft assembly.

  1. Reinstall the front speed sensor and the front axle hub sub-assembly (YARIS_NCP93 RM000001IWO01KX.html).



NG
CLEAN OR REPLACE FRONT SPEED SENSOR ROTOR
OK


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

  1. Turn the ignition switch off.

  1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

  1. Disconnect the skid control ECU connector and the front speed sensor connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A71-7 (FR+) - A54-2 (FR+)
    		Always
    		Below 1 Ω
    A71-6 (FR-) - A54-1 (FR-)
    		Always
    		Below 1 Ω
    A71-19 (FL+) - A55-2 (FL+)
    		Always
    		Below 1 Ω
    A71-18 (FL-) - A55-1 (FL-)
    		Always
    		Below 1 Ω
    A71-7 (FR+) - Body ground
    		Always
    		10 kΩ or higher
    A71-6 (FR-) - Body ground
    		Always
    		10 kΩ or higher
    A71-19 (FL+) - Body ground
    		Always
    		10 kΩ or higher
    A71-18 (FL-) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the skid control ECU connector and the front speed sensor connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


9.INSPECT BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (SENSOR INPUT)


    Yaris. Ncp93, 131.Brake Control Dynamic Control Systems.Anti-Lock Brake System (For Sedan). Dtc C1275 Abnormal Change In Output Signal Of Front Speed Sensor Rh (Test Mode Dtc)

  1. Turn the ignition switch to ON.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A54-2 (FR+) - Body ground
    		Ignition switch to ON
    		8 to 14 V
    A55-2 (FL+) - Body ground
    		Ignition switch to ON
    		8 to 14 V
    NOTICE:
    Check the speed sensor signal after replacement (YARIS_NCP93 RM000000XHT097X.html).
    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (YARIS_NCP93 RM000000XHN0BQX.html).
Text in Illustration
*a
Front view of wire harness connector
(to Front Speed Sensor)


NG
REPLACE BRAKE ACTUATOR ASSEMBLY (YARIS_NCP93 RM000001BXP02KX.html)
OK


10.RECONFIRM DTC

  1. Clear the DTCs (YARIS_NCP93 RM000000XHV0CPX.html).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

  1. Check if the same DTC is recorded (YARIS_NCP93 RM000000XHV0CPX.html).

Result
Result
Proceed to
DTCs C1413 and/or C1414 are output
A
DTCs C1413 and C1414 are not 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 (YARIS_NCP93 RM000000XHN0BQX.html).


B
CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (YARIS_NCP93 RM000000XHS0AMX.html)
A


11.REPLACE FRONT SPEED SENSOR

  1. Turn the ignition switch off.

  1. Replace the front speed sensor (YARIS_NCP93 RM000001BXX01FX.html).

    NOTICE:
    Check the speed sensor signal after replacement (YARIS_NCP93 RM000000XHT097X.html).

NEXT


12.RECONFIRM DTC

  1. Clear the DTCs (YARIS_NCP93 RM000000XHV0CPX.html).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

  1. Check if the same DTC is recorded (YARIS_NCP93 RM000000XHV0CPX.html).

Result
Result
Proceed to
DTCs C1413 and C1414 are not output
A
DTCs C1413 and/or C1414 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 (YARIS_NCP93 RM000000XHN0BQX.html).


B
REPLACE FRONT SPEED SENSOR ROTOR (YARIS_NCP93 RM000001IWN01EX.html)
A

END