DTC C1235 Pressure Sensor(Primary)-Electrical: DTC Detecting Condition
DTC DETECTING CONDITION CHART
| Item |
Detecting Condition |
Possible cause |
| DTC strategy |
|
- Open or short of pressure sensor circuit
- Inoperative pressure sensor
- Inoperative HECU
|
| Case 1 |
Monitoring Period |
|
| Enable Conditions |
- A sensor supply failure is detected if Sensor Supply Voltage > 5.3 V or Sensor Supply Voltage < 4.7 V for t > = 60 ms.
|
| Case 2 |
Monitoring Period |
|
| Enable Conditions |
- A Fault is set if the DSO signal is voltage of DSO > 4.7 V or voltage of DSO < 0.3V for a time t > = 100 ms.
- DSO: original pressure value.
|
| Case 3 |
Monitoring Period |
|
| Enable Conditions |
- A Fault is set if the DSI signal is voltage of DSI > 4.7 V or voltage of DSI < 0.3V for a time t > = 100 ms.
- DSI: inverted pressure value.
|
| Case 4 |
Monitoring Period |
|
| Enable Conditions |
- A Fault is set if the voltage of DSO + DSI > 5.5V or voltage of DSO + DSI < 4.5V for a time t >= 100ms.
- DSO: original pressure value.
- DSI: inverted pressure value.
|
| Case 5 |
Monitoring Period |
|
| Enable Conditions |
- POS detects internal sensor malfunctions (sensor element, amplification, etc.). The POS is triggered if no low voltage is present and supply voltage is switched on. The test phase is divided in two 60 ms parts. DSO signal must be < 0.5 V for 30 ms. In phase 2 DSO signal must be between 1.9V and 3.1V for also 30 ms then the POS Test is passed. The test phase is divided in two 60 ms parts. DSO and DSI signal must be < 0.5 V for 30 ms. In phase 2 DSO and DSI signal must be between 1.9 V and 3.1 V for also 30 ms then the POS Test is passed. A fault is set if POS does not satisfy the above conditions
|
| Fail Safe |
- No Pressure Signal available..
- Sensor failure outside the ABS control cycle
- Only the ABS/ESC functions are inhibited, allow the EBD. The ABS/ESC warning lamps are activated and the EBD warning lamp is not activated.
- Sensor failure inside the ABS control cycle
- Inhibit the ESC control, allow the EBD. The ESC warning lamps are activated. After the control, the ABS functions are inhibited. The ABS warning lamps are activated.
|