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DI10-101 CHANGED BY EFFECTIVE DATE AFFECTED VIN DIAGNOSIS DI ENG SM - 2004.4 Trouble Code and Symptom Diagnosis Procedures EGR Actuator Malfunction EGR Vacuum Modulator - Short to GND EGR Vacuum Modulator - Short to +Batt Trouble Code Symptom P1405 P1406 MIL ON Unable EGR Control (Air Flow) YES YES YES YES Check actuator wiring Wiring Problem? Check resistance of actuator NO Resistance Problem? Check ECU wiring NO Wiring Problem? Replace actuator Trouble Continues? NO Repiar Completed Repair or replace Replace actuator Repair or replace Replace ECU NO YES Check wiring and insulation NO Wiring Problem? NO Repair wiring |