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DIESEL CONTROL SYSTEM FLA -411 DTC P1634 AUXILIARY HEATER MALFUNCTION COMPONENT LOCATION E56FA5A1 Aux. heater relay EGNG013I GENERAL DESCRIPTION E9A6BA6F Because thermal efficiency of electronically controlled diesel engine is higher than that of gasoline engine, heat loss to ※ Heater relay operation inhibited condition : engine coolant temperature above 70℃, engine speed below 700RPM(to DTC DESCRIPTION E152D41E P1634 is set when excessive current or "0"A is detected in heater relay control circuit for more than 1.0 sec. at heater DTC DETECTING CONDITION EAFFDBB9 Item Detecting Condition Possible Cause DTC Strategy • Voltage monitoring Enable Conditions • IG KEY "ON" (monitoring only performed at relay operating condition) ThresholdValue • Short to battery DiagnosticTime • 1.0 sec. Fuel Cut NO EGR Off NO Fuel Limit NO Fail Safe MIL NO • PTC heater relay #1control circuit • Heater relay component |