Injects fuel to combustion chamber based on signals from ECM Supplies high-pressure fuel to common rail Stores high-pressure fuel produced by supply pump This helps to reduce engine" vibration and noise. In order to soften combustion shock, this system performs "pilot-injection" as the subsidiary fuel injection prior to the main fuel injection. The common rail system provides two split fuel injections. Therefore, both fuel injection time and fuel injection volume can be precisely regulated by the ECM. In addition, this system uses the 2-Way Valve (TWV) inside the injector to open and close the fuel passage. The ECM causes the supply pump to supply the fuel necessary to obtain the target fuel pressure. The ECM provides an electric current to the solenoid valve in the injector, using the EDU, to regulate the fuel injection timing and volume, and also monitors the internal fuel pressure of the common rail using the fuel pressure sensor.
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By storing fuel at high-pressure, the common rail system can provide fuel at stable fuel injection pressures, regardless of engine speed or engine load. This system stores fuel, which has been pressurized and supplied by the supply pump, in the common rail. The common rail system uses high-pressurized fuel for improved fuel economy and to provide robust engine power, while suppressing engine vibration and noise. Open or short in air fuel ratio sensor circuit (High output) Open or short in air fuel ratio sensor circuit (Low output) Open or short in exhaust gas temperature sensor circuit (Downstream) (High output) Open or short in exhaust gas temperature sensor circuit (Downstream) (Low output) Open or short in exhaust gas temperature sensor circuit (Downstream) Open or short in differential pressure sensor circuit (High output) Open or short in differential pressure sensor circuit (Low output) Open or short in differential pressure sensor circuitĭifferential pressure sensor is clogged or has incorrect vacuum hose arrangement Open or short in exhaust gas temperature sensor circuit (Upstream) (High output)
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Open or short in exhaust gas temperature sensor circuit (Upstream) (Low output) Open or short in exhaust gas temperature sensor circuit (Upstream) Open or short in air fuel ratio sensor heater control circuit (High output) Open or short in air fuel ratio sensor heater control circuit (Low output)
#Toyota techdoc code#
*: There may be no DTC output depending on the condition of the malfunction.ĭiagnostics trouble code description for DPF: P0031, P0032, P1386*, P2238, P2239, P2252, P2253Ĭorrect fuel pressure cannot be fed to the exhaust fuel addition injector Open or short in air fuel ratio sensor or heater circuit Incorrect vacuum hose arrangement of the differential pressure sensor Short in differential pressure sensor circuit Open in differential pressure sensor circuit Short in exhaust gas temperature sensor circuit Open in exhaust gas temperature sensor circuit Open or short in exhaust fuel addition injector Short in exhaust fuel addition injector circuit Open in exhaust fuel addition injector circuit УКАЗАНИЕ: This table indicates typical DTC combinations for each malfunction occurrence. By controlling the air fuel ratio, combustion control for low temperature combustion and DPF catalyst regeneration are properly regulated.ĭiagnostics Trouble Codes (DTCs) table for DPF: Also, detects DPF catalytic converter temperature to prevent the catalytic converter temperature from rising too high.ĭetects the volume of PM deposits and incorrect vacuum hose arrangement on the DPF catalytic converter.
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Used for estimating DPF catalytic converter temperature and adjusting fuel addition by ECM while DPF catalyst regeneration is performed. Toyota Alphard / Vellfire Service information library 04.2008 - 08.2012ĢAZ-FE - 2.Adds fuel into the exhaust port in order to raise the catalyst temperature and combust PM.