general information - Martin Nez

M4-76 FI SYSTEM DIAGNOSIS“C41” (P0230-H/L) FP RELAY CIRCUIT MALFUNCTIONDETECTED CONDITIONPOSSIBLE CAUSEC41No voltage is applied to fuel pumpalthough fuel pump relay is turned ON,or voltage is applied to fuel pump,although fuel pump relay is turned OFF.• Fuel pump relay circuit open or short• Fuel pump relay malfunction• ECM malfunctionP0230HVoltage is applied to fuel pump althoughfuel pump relay is turned OFF.• Fuel pump relay switch circuit shorted to powersource• Faulty fuel pump relay (switch side)LNo voltage is applied to fuel pumpalthough fuel pump relay is turned ON.• Fuel pump relay coil circuit open or short• Faulty fuel pump relay (coil side)ECMFuel pumpEngine stopswitchVMFP RelayY/RY/BR/BIO/WTo side-standswitchSide-standrelayIgnitionswitchFuel pumprelayINSPECTIONStep 1 (When indicating C41:)1) Turn the ignition switch to OFF.2) Remove the seat tail cover. (8-4)3) Check the FP relay coupler for loose or poor contacts.If OK, then check the FP relay. (5-6)1Is the FP relay OK?1YESNO• Y/B or O/W wire open or short or poor ] connection• Y/R or R/Bl wire open, shorted or poor W connection• If wire and connection are OK, intermittent troubleor faulty ECM.• Recheck each terminal and wire harness foropen circuit and poor connection.• Replace the ECM with a known good one, andinspect it again.Replace the FP relay with a new one.ECM couplers (Harness side)