DTC C1464/31: Front Speed Sensor RH Circuit; 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 C1465/32: Front Speed Sensor LH Circuit: Description
The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for ABS control.
DTCs C1271/71 and C1272/72 can be cleared when the speed sensor sends a wheel speed signal or when Test Mode ends. DTCs C1271/71 and C1272/72 are output only in Test Mode.
HINT:
When the connectors between the speed sensor and skid control ECU are connected, the following waveform is output.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1464/31 | 251 | At a vehicle speed of 10 km/h (6 mph) or more, an open or short signal occurs in the speed sensor circuit. |
|
| ↑ | 252 | More than one speed sensor circuit signal is abnormal. | ↑ |
| ↑ | 253 | Speed sensor circuit signal is open for 0.5 seconds or more. | ↑ |
| ↑ | 254 | A momentary interruption of the sensor signal from the speed sensor occurs 255 times or more. | ↑ |
| ↑ | 255 | Frequency of 2.4 kHz or more is input. |
|
| ↑ | 262 | Either of the following is detected:
|
|
| C1465/32 | 264 | At a vehicle speed of 10 km/h (6 mph) or more, an open or short signal occurs in the speed sensor circuit. |
|
| ↑ | 265 | More than one speed sensor circuit signal is abnormal. | ↑ |
| ↑ | 266 | Speed sensor circuit signal is open for 0.5 seconds or more. | ↑ |
| ↑ | 267 | A momentary interruption of the sensor signal from the speed sensor occurs 255 times or more. | ↑ |
| ↑ | 268 | Frequency of 2.4 kHz or more is input. |
|
| ↑ | 275 | Either of the following is detected:
|
|
| C1271/71 C1272/72 |
- | Detected only during Test Mode. |
|
HINT:
- DTCs C1464/31 and C1271/71 are for the front speed sensor RH.
- DTCs C1465/32 and C1272/72 are for the front speed sensor LH.