VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1411, C1412

DTC Code DTC Name
C1411 Rear Speed Sensor RH Performance
C1412 Rear Speed Sensor LH Performance

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 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 forward or backward waveform to the ECU.

A0162H7E07
DTC Code DTC Detection Condition Trouble Area

C1411

C1412

Any of the following is detected:


  1. When the vehicle is driven in reverse at a speed of 3 km/h (1.8 mph) or more and 3 of the wheel sensors detect the reverse signal, the other sensor detects a high frequency pulse 75 times while the engine switch is on (IG).

  2. At a vehicle speed of 10 km/h (6 mph) or more, the vehicle speed sensor output drops by 50% for 5 seconds.

  3. At a vehicle speed of 10 km/h (6 mph) or more, the direction of wheel rotation changes 7 times in 0.006 seconds while the engine switch is on (IG).

  4. At a vehicle speed of 30 km/h (18 mph) or more, one wheel direction is different from the other 3 wheels for 1 second.

  5. At a vehicle speed of 100 km/h (60 mph), a reverse signal is output for 1 second or more.

  6. At a vehicle speed of 30 km/h (18 mph) or more, the rotation direction of the one of the wheels is not detected normally and the rotation direction of the other 3 wheels is not the same for 1 second.

 Rear speed sensor RH/LH

Tech Tips


  • DTC C1411 is for the rear speed sensor RH.

  • DTC C1412 is for the rear speed sensor LH.

WIRING DIAGRAM

Refer to DTCs C1403 and C1404 Click here.

INSPECTION PROCEDURE

PROCEDURE


  1. REPLACE REAR SPEED SENSOR


    1. Replace the rear speed sensor Click here.

      Note

      Check the speed sensor signal after replacement Click here.

      Tech Tips

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


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