Toyota Fortuner. Dtc C0200/31 Right Front Wheel Speed Sensor Signal Malfunction

The speed sensor detects wheel speed and transmits the appropriate signals to the ECU. These signals are used for control of the ABS.
Each of the front and rear rotors have 48 serrations. When the rotors rotate, the magnetic field generated by the permanent magnet in the speed sensor produces AC voltage. Since the frequency of this AC voltage changes in direct proportion to the speed of the rotor, the frequency is used by the ECU to detect the speed of each wheel.
DTCs C1271/71, C1272/72, C1275/75 and C1276/76 can be deleted when the speed sensor sends a vehicle speed signal or the test mode ends. DTCs C1271/71, C1272/72, C1275/75/75 and C1276/76 are output only in the test mode.

DTC No.	DTC Detection Condition	Trouble Area
C0200/31 C0205/32	When one of following occurs With vehicle speed at 10 km/h (6 mph) or more, sensor signal circuit of faulty wheel is open or short for 15 sec. or more Momentary interruption of sensor signal of faulty wheel has occurred 7 times or more Sensor signal circuit is open for 0.5 sec. or more	Front speed sensor Front speed sensor circuit Front speed sensor rotor Sensor installation
C1235/35 C1236/36	At vehicle speed of 20 km/h (12 mph) or more, condition that noise is included in speed sensor signal continues for 5 sec. or more	Front speed sensor Front speed sensor circuit Sensor installation
C1271/71	Detected only during test mode	Front speed sensor RH Sensor installation Front speed sensor rotor RH
C1272/72	Detected only during test mode	Front speed sensor LH Sensor installation Front speed sensor rotor LH
C1275/75	Detected only during test mode	Front speed sensor rotor RH
C1276/76	Detected only during test mode	Front speed sensor rotor LH

HINT:

DTCs C0200/31 and C1235/35 are for the front speed sensor RH.
DTCs C0205/32 and C1236/36 are for the front speed sensor LH.

WIRING DIAGRAM

INSPECTION PROCEDURE

1.CHOOSE DIAGNOSIS METHOD

Choose the diagnosis method.
Method
Method
Proceed to
Using intelligent tester
A
Not using intelligent tester
B

Method
Method	Proceed to
Using intelligent tester	A
Not using intelligent tester	B

Go to step 4

A

2.READ VALUE USING INTELLIGENT TESTER (FRONT SPEED SENSOR)

Check the Data List for proper functioning of the front speed sensor.

Skid control ECU
Item	Measurement Item / Range (Display)	Normal Condition	Diagnostic Note
FR Wheel Speed	Wheel speed sensor (FR) reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph)	Actual wheel speed	Speed similar to that of speedometer
FL Wheel Speed	Wheel speed sensor (FL) reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph)	Actual wheel speed	Speed similar to that of speedometer

OK:: There is almost no difference between actual wheel speed and displayed speed value.

HINT:

There is a tolerance of +/-10% in the speedometer indication.

Go to step 4

OK

3.INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS

Connect an oscilloscope to terminals 31 (FR+) and 30 (FR-), and 9 (FL+) and 8 (FL-) of the S2 skid control ECU connector.

Drive the vehicle at about 30 km/h (19 mph), and check the signal waveform.
OK:
A waveform is output, as shown in the illustration.
HINT:
1. As vehicle speed (wheel revolution speed) increases, the wavelength shortens and the fluctuation in the output voltage becomes greater.
2. Scratches, looseness or foreign matter on the speed sensor rotor cause noise (errors) in the signal waveform.

Go to step 8

REPLACE BRAKE ACTUATOR ASSEMBLY

4.INSPECT FRONT SPEED SENSOR

Disconnect the S4 and S5 sensor connectors.

Measure the resistance of the speed sensors.

Standard resistance:
LH:
Tester Connection
Specified Condition
1 (FL+) - 2 (FL-)
0.65 to 1.8 kΩ
1 (FL+) - Body ground
10 kΩ or higher
2 (FL-) - Body ground
10 kΩ or higher
RH:
Tester Connection
Specified Condition
1 (FR+) - 2 (FR-)
0.65 to 1.8 kΩ
1 (FR+) - Body ground
10 kΩ or higher
2 (FR-) - Body ground
10 kΩ or higher
HINT:
Check the speed sensor signal after the speed sensor replacement.

REPLACE FRONT SPEED SENSOR

OK

5.CHECK WIRE HARNESS (SKID CONTROL ECU - FRONT SPEED SENSOR)

Disconnect the S2 ECU connector.

Disconnect the S4 and S5 sensor connectors.

Measure the resistance of the wire harness side connectors.

Standard resistance:
LH:
Tester Connection
Specified Condition
S2-9 (FL+) - S4-1 (FL+)
Below 1 Ω
S2-8 (FL-) - S4-2 (FL-)
Below 1 Ω
S4-1 (FL+) - Body ground
10 kΩ or higher
S4-2 (FL-) - Body ground
10 kΩ or higher
RH:
Tester Connection
Specified Condition
S2-31 (FR+) - S5-1 (FR+)
Below 1 Ω
S2-30 (FR-) - S5-2 (FR-)
Below 1 Ω
S5-1 (FR+) - Body ground
10 kΩ or higher
S5-2 (FR-) - Body ground
10 kΩ or higher

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

6.INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS

Connect an oscilloscope to terminals 31 (FR+) and 30 (FR-), and 9 (FL+) and 8 (FL-) of the S2 skid control ECU connector.

Drive the vehicle at about 30 km/h (19 mph), and check the signal waveform.
OK:
A waveform is output, as shown in the illustration.
HINT:
1. As vehicle speed (wheel revolution speed) increases, the wavelength shortens and the fluctuation in the output voltage becomes greater.
2. Scratches, looseness or foreign matter on the speed sensor rotor cause noise (errors) in the signal waveform.

Go to step 8

OK

7.CHECK IF DTC OUTPUT RECURS

Clear the DTCs.

Drive the vehicle at approximately 30 km/h (19 mph) or more for 60 seconds or more.

Check for DTCs.
Result
Result
Proceed to
DTC is output
A
DTC is not output
B

Result
Result	Proceed to
DTC is output	A
DTC is not output	B

END

REPLACE BRAKE ACTUATOR ASSEMBLY

8.INSPECT FRONT SPEED SENSOR (INSTALLATION)

Check the speed sensor installation (Toyota Fortuner RM0000010JM003X.html).
OK:
The installation bolt is tightened properly.
There is no clearance between the sensor and front steering knuckle.
HINT:
Check the speed sensor signal after the speed sensor replacement.

SECURELY REINSTALL FRONT SPEED SENSOR

OK

9.INSPECT SPEED SENSOR (TIP)

Remove the front speed sensor.

Check the sensor tip.
OK:
No scratches or foreign matter on sensor tip.
HINT:
1. If the sensor is contaminated with oil or other foreign material, clean the sensor.
2. 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.
3. Check the speed sensor signal after cleaning or replacing the speed sensor.
NOTICE:
Do not replace the speed sensor if no damage to the speed sensor tip is found.

CLEAN OR REPLACE SPEED SENSOR

OK

10.INSPECT SPEED SENSOR ROTOR

Remove the front axle hub.

Check the sensor rotor serrations.
OK:
No scratches, missing teeth or foreign matter on sensor rotor.
HINT:
1. If foreign matter is attached, remove it and check the output waveform after reassembly.
2. Check the speed sensor signal after cleaning or replacing the speed sensor rotor.

CLEAN OR REPLACE SPEED SENSOR ROTOR

OK

11.CHECK IF DTC OUTPUT RECURS

Clear the DTCs.

Drive the vehicle at approximately 30 km/h (19 mph) or more for 60 seconds or more.

Check for DTCs.
Result
Result
Proceed to
DTC is output
A
DTC is not output
B

END

REPLACE BRAKE ACTUATOR ASSEMBLY

Tester Connection	Specified Condition
1 (FL+) - 2 (FL-)	0.65 to 1.8 kΩ
1 (FL+) - Body ground	10 kΩ or higher
2 (FL-) - Body ground	10 kΩ or higher

Tester Connection	Specified Condition
1 (FR+) - 2 (FR-)	0.65 to 1.8 kΩ
1 (FR+) - Body ground	10 kΩ or higher
2 (FR-) - Body ground	10 kΩ or higher

Tester Connection	Specified Condition
S2-9 (FL+) - S4-1 (FL+)	Below 1 Ω
S2-8 (FL-) - S4-2 (FL-)	Below 1 Ω
S4-1 (FL+) - Body ground	10 kΩ or higher
S4-2 (FL-) - Body ground	10 kΩ or higher

Tester Connection	Specified Condition
S2-31 (FR+) - S5-1 (FR+)	Below 1 Ω
S2-30 (FR-) - S5-2 (FR-)	Below 1 Ω
S5-1 (FR+) - Body ground	10 kΩ or higher
S5-2 (FR-) - Body ground	10 kΩ or higher