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general information - Martin Nez

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FI SYSTEM DIAGNOSIS 4-85“C60” (P0480) COOLING FAN RELAY CIRCUIT MALFUNCTIONDETECTED CONDITIONCooling fan relay signal is not input to ECM.POSSIBLE CAUSE• Cooling fan relay circuit open or short• ECM malfunctionECMCooling fanrelayEngine stopswitchSide-standrelayIgnitionswitchFAR G/R O/WTo Side-standswitchCooling fanmotorINSPECTIONStep 11) Turn the ignition switch to OFF.2) Lift and support the fuel tank. (5-3)3) Check the cooling fan relay coupler for loose or poor contacts.If OK, then inspect the cooling fan relay. (7-6)1Is the cooling fan relay OK?1YESNO• O/W and G/R wire open or shorted to ground,or poor E 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 cooling fan relay with a new one.ECM couplers (Harness side)4) After repairing the trouble, clear the DTC using SDS tool.(4-26)

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