DTC C0115 Abs Wheel Speed Sensor Signal Malfunction In One Of Four Wheels
DTC DETECTING CONDITION:
- Defective ABS wheel speed sensor signal (noise, abnormal signal, etc.)
- Defective magnetic encoder
- When a wheel is turned freely for a long time
TROUBLE SYMPTOM:
- ABS does not operate.
- EBD does not operate.
NOTE:
Brake warning light comes on as well as the ABS warning light.
WIRING DIAGRAM:
DIAGNOSIS PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 WHETHER A WHEEL TURNED FREELY OR NOT. Check if the wheels have been turned freely for more than one minute, such as when the vehicle is jacked-up, under full-lock cornering or when the wheels are not in contact with road surface. |
Did the wheels turn freely? | ABS is normal. Erase the memory.
NOTE:
This diagnostic trouble code may sometimes occur if the wheels turn freely for a long time, for example when the vehicle is towed or jacked-up, or when steering wheel is continuously turned all the way.
|
Go to step 2. |
| 2 CHECK TIRE SPECIFICATIONS. Turn the ignition switch to OFF. |
Are the tire specifications correct? | Go to step 3. | Replace the tire. |
| 3 CHECK WEAR OF TIRE. | Is the tire worn excessively? | Replace the tire. | Go to step 4. |
| 4 CHECK TIRE INFLATION PRESSURE. | Is the tire pressure correct? | Go to step 5. | Adjust the tire pressure. |
| 5 CHECK INSTALLATION OF ABS WHEEL SPEED SENSOR. | Are the ABS wheel speed sensor installation bolts tightened 7.5 N.m (0.76 kgf-m, 5.5 ft-lb)? (For four wheels) | Go to step 6. | Tighten the ABS wheel speed sensor installation bolts. |
6 CHECK ABS WHEEL SPEED SENSOR SIGNAL.
|
Does the oscilloscope indicate the waveform pattern like shown in the figure when the tire is slowly turned? Does the oscilloscope indication repeat the waveform pattern like shown in the figure when the tire is slowly turned in equal speed for more one rotation? | Go to step 8. | Go to step 7. |
| 7 CHECK ABS WHEEL SPEED SENSOR OR MAGNETIC ENCODER. | Are there foreign matter, breakage or damage at the tip of ABS wheel speed sensor or magnetic encoder? | Remove dirt thoroughly. Also replace the ABS wheel speed sensor or magnetic encoder as a unit with hub unit bearing if it is broken or damaged. | Go to step 8. |
8 CHECK ABSCM&H/U.
|
Is the same DTC displayed? | Replace the ABSCM only. < Ref. to REPLACEMENT , ABS Control Module and Hydraulic Control Unit (ABSCM&H/U). > | Go to step 9. |
| 9 CHECK ANY OTHER DTC ON DISPLAY. | Is there any other DTC displayed? | Perform the diagnosis according to DTC. | It results from a temporary noise interference.
NOTE:
Though the ABS warning light remains on at this time, this is normal. Drive the vehicle at more than 12 km/h (7 MPH) in order to turn ABS warning light off. Be sure to drive the vehicle and check that the warning light goes off.
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