2002 · FUEL [13] · страница 8 из 68 · Открыть оригинал PDF ↗
FAIL-SAFE, BACKUP FUNCTIONS
When abnormalities in the major sensors are detected by diagnosis functions, pre-set control logic operates
tomaintainasafedrivingconditionforthevehicle.
| Diagnosis item | Control features in malfunction |
|---|---|
| Accelerator pedal position sensor | D Accelerator pedal released (idle switch ON) Acceleration opening degree = 0 % D Accelerator pedal applied (idle switch OFF) Engine controlled at low speed Acceleration opening degree = 30 % fixed D Void EGR control |
| Idle switch | Void idling speed control. |
| Engine speed sensor | D Engine controlled at low speed D Void EGR control D Void variable geometry turbocharger control |
| Boost air temperature sensor | D Maintain the intake air temperature at 50_C. D Void EGR control |
| Vehicle speed sensor | D Void idling speed control. D Void EGR control |
| Engine coolant temperature sensor | D Maintain the engine coolant temperature at 80_C (However, the system assumes the coolant temperature as 0_C when engine is started.). D Void EGR control |
| Control sleeve position sensor | D Engine controlled at low speed D Void EGR control D Void variable geometry turbocharger control |
| Timer piston position sensor | D Injection timing stabilizing control D Void EGR control |
| Barometric pressure sensor (ECU built-in) | D Keep the barometric pressure at 101 kPa. D Void EGR control D Void variable geometry turbocharger control |
| Fuel temperature sensor | Maintain the fuel temperature at 40_C. |
| Boost pressure sensor | D Keep the boost pressure as barometric pressure (101 kPa). D Void EGR control D Void variable geometry turbocharger control |
| Injection volume adjusting ROM | Void correction. |
| GE actuator | D Engine controlled at low speed D Void EGR control D Void variable geometry turbocharger control |
| Over boost | D Void variable geometry turbocharger control D Engine controlled at low fuel injection |
| Timing control valve | D Injection timing stabilizing control D Void EGR control |
| EGR valve position sensor | Void EGR control |
| Variable geometry control pressure sensor | D Void EGR control D Void variable geometry turbocharger control |
Таблица в оригинале
Оригинальная страница руководства
