DTC C1273/73: Low Output Signal of Rear Speed Sensor RH (Test Mode DTC); DTC C1274/74: Low Output Signal of Rear Speed Sensor LH (Test Mode DTC); DTC C1466/33: Rear Speed Sensor RH Circuit; DTC C1467/34: Rear Speed Sensor LH Circuit [09/2013 - ]: Description
The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU (brake booster with master cylinder assembly). These signals are used for brake control.
DTCs C1273/73 and C1274/74 can be cleared when the speed sensor sends a wheel speed signal or when Test Mode ends. DTCs C1273/73 and C1274/74 are output only in Test Mode.
HINT:
When the connectors between the speed sensor and skid control ECU (brake booster with master cylinder assembly) are connected, the following waveform is output.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1273/73 C1274/74 |
- | Detected only during Test Mode. |
|
| C1466/33 | 521 | While driving at 10 km/h (6 mph) or more, speed sensor output from one or two wheels is lower than that from other wheels for 15 seconds or more. |
|
| ↑ | 522 | A malfunction occurs in 2 or more wheels. | ↑ |
| ↑ | 523 | An open is detected in the speed sensor signal circuit for 0.5 seconds or more. |
|
| ↑ | 524 | Instantaneous interruption of sensor signal from the malfunctioning wheel occurs 255 times or more. |
|
| ↑ | 526 | When VM1 voltage is 8.6 V or more, sensor supply voltage drops for 0.5 seconds or more. |
|
| ↑ | 527 | While driving at 10 km/h (6 mph) or more, speed sensor output from one wheel is 0 km/h (0 mph) for 1 second or more. |
|
| ↑ | 528 | When VM1 voltage is 8.6 V or more, sensor supply voltage drops for 60 seconds or more. |
|
| C1467/34 | 531 | While driving at 10 km/h (6 mph) or more, speed sensor output from one or two wheels is lower than that from other wheels for 15 seconds or more. |
|
| ↑ | 532 | A malfunction occurs in 2 or more wheels. | ↑ |
| ↑ | 533 | An open is detected in the speed sensor signal circuit for 0.5 seconds or more. |
|
| ↑ | 534 | Instantaneous interruption of sensor signal from the malfunctioning wheel occurs 255 times or more. |
|
| ↑ | 536 | When VM1 voltage is 8.6 V or more, sensor supply voltage drops for 0.5 seconds or more. |
|
| ↑ | 537 | While driving at 10 km/h (6 mph) or more, speed sensor output from one wheel is 0 km/h (0 mph) for 1 second or more. |
|
| ↑ | 538 | When VM1 voltage is 8.6 V or more, sensor supply voltage drops for 60 seconds or more. |
|
HINT:
- DTCs C1466/33 and C1273/73 are for the rear speed sensor RH.
- DTCs C1467/34 and C1274/74 are for the rear speed sensor LH.