| DTC Strategy |
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- Open or short in power supply circuit (IGN+)
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| Case 1 |
Monitoring Period |
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| Enable Conditions |
- Watchdog and valve relay function is tested during startup. A failure is detected if the valve relay/Enable remains in off position when it is turned on and vice versa. Reason could be short to GND or UZ, interrupted lines or a inoperative output stage etc.
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| Case 2 |
Monitoring Period |
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| Enable Conditions |
- A Fault is detected if valve relay voltage < 0.8 * battery voltage for a time 500 ms.
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| Case 3 |
Monitoring Period |
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| Enable Conditions |
- If valve relay malfunction and supply solenoid valve short to battery or supply solenoid valve and medium or high ohmic short of valve relay (or a valve) to valve relay voltage, solenoid valve voltage or GND are detected.
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| Fail Safe |
- No valve actuation possible.
- The ABS/EBD/ESC functions are inhibited.
- The ABS/EBD/ESC warning lamps are activated.
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