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[ Pobierz całość w formacie PDF ]//-->DI−179DIAGNOSTICS−ENGINEDIBY8−04DTCP0443Evaporative Emission Control System PurgeControl Valve CircuitCIRCUIT DESCRIPTIONIn order to reduce HC emissions, evaporated fuel from the fuel tank is routed through the charcoal canisterto the intake manifold for combustion in the cylinders. The engine ECU changes the duty signal to the EVAPVSV. After the engine is warmed up, the intake quantity of HC emissions are appropriate for driving in termsof engine load, engine speed, vehicle speed, and other parameters.This monitor runs for 1 second when EVAP purge VSV is activated.DTC No.P0443DTC Detection ConditionEVAP VSV proper response to engine ECU command doesnot occur (No dury signal from ECM for 10 seconds whencommanded duty ratio is 5 to 95 %, 1 trip detection logic)Trouble AreaSEVAP VSVSOpen or short in VSV circuit for EVAPSEngine control ECUWIRING DIAGRAMEngine Control ECUV9VSV (EVAP)252AB−Y1SB1IV2452QB−YL−B34E7PRGSBCowl Side J/B LHEFI or ECD No. 2J/B No. 5B−WEngine Room R/BEFI or ECD Relay1B−WB−YF37 FL BlockB−GMAINBattery2EA1341211B−YW−BEngine Room J/B44431B1A11 EFI or ECD No. 1 11B1CW−B155D25CB−W8E11 MRELA216062UZ−FE ENGINE SUP (RM1113E)DI−180DIAGNOSTICS−ENGINEINSPECTION PROCEDUREHINT:Read freeze frame data using the hand−held tester. Freeze frame data records the engine conditions whena malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle wasrunning or stopped, if the engine was warmed up or not, if the air−fuel ratio was lean or rich, and other datafrom the time the malfunction occurred.1Check operation of EVAP VSV.PREPARATION:(a) Connect the hand−held tester to the DLC3.(b) Turn ON the ignition switch and the hand−held testermain switch.(c) Select the item ”DIAGNOSIS / OBD/MOBD / ACTIVETEST / EVAP VSV” (press the right or left button).CHECK:Check operation of the VSV when the VSV is operated by thehand−held tester.OK:VSV is ON:There is no air from port E flows out through port F.VSV is OFF:Air from port E flows out through port F.OKCheck for intermittent problems(Seepage DI−3).AirEFFAirEVSV is ONVSV is OFFA20786NG2Check voltage between terminal PRG of engine control ECU connector and bodyground.PREPARATION:(a) Remove the glove compartment.(b) Turn the ignition switch ON.CHECK:Measure the voltage between terminals PRG of the ECU con-nector and body ground.OK:Voltage: 9 to14V.A17375PRG (+)OKRepair or replace engine control ECU (See Pub.No. RM630E, page FI−74).NG2UZ−FE ENGINE SUP (RM1113E)DI−181DIAGNOSTICS−ENGINE3Check EVAP VSV (See Pub. No. RM630E, page FI−61).NGReplace EVAP VSV.OK4Check for open and short in wire harness between EVAP VSV and engine controlECU.NGRepair or replace harness and connector.OK5Check for open and short in wire harness between EFI MAIN relay and EVAPVSV.NGRepair or replace harness and connector.OKCheck engine control ECU power source cir-cuit (Seepage DI−237)2UZ−FE ENGINE SUP (RM1113E) [ Pobierz całość w formacie PDF ]
