| DTC Strategy |
|
- Open fuse
- Faulty valve coil
- Faulty HECU
- Faulty battery
|
| Enable Condition |
- Normal battery voltage (8.5 to 16.5V)
- Ignition "ON"
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| Threshold Value |
Case1 |
- Fault is detected if valve relay power is less than 80% of battery power within 80 ms after valve relay is on
- Fault is detected if any of the following conditions are satisfied after valve relay is on
- Drain-Source voltage of valve relay FET is different by more than (1.0±0.4) V
- Leak current is more than (3.0±1) mA when valve relay initial act
|
| Case2 |
- Fault is detected if valve relay power is greater than 80% of battery power within 80 ms after valve relay turns on to off
- Monitoring time: Once after IGN On
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| Case3 |
- Fault is detected if valve relay power is less than (7.0±0.5) V or (Battery Power-4.0) V for more than 500 ms when valve relay is on
- Fault is detected if Drain-Source voltage of valve relay FET is different by more than (1.0±0.4) V for more than 500 ms
- Fault is detected if temperature of the valve relay driver is greater than (195 ± 20)°C for more than 500 ms
|
| Case4 |
- Fault is detected if valve power is less than (2.0±0.2) V for 60 ms when valve relay is on and valve is off
- Fault is detected if any of the following conditions are satisfied for 60 ms when valve relay is on and valve power is on
- Valve current is greater than (8.5±2.5) A
- Temperature of the valve driver is greater than (195 ± 20)°C
|
| Detecting time |
Case1, 2 |
- In control: 80 ms
- Non-control: 80 ms
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| Case3 |
- In control: 500 ms
- Non-control: 500 ms
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| Case4 |
- In control: 60 ms
- Non-control: 60 ms
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| Warning Lamp |
|
| Disable Condition |
- If valve and valve relay initial active test are normal after ignition off/on
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