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DIESEL CONTROL SYSTEM FLA -339 DTC P0646 A/C CLUTCH RELAY CONTROL CIRCUIT LOW COMPONENT LOCATION EEA5390B A/C clutch EGNG014U GENERAL DESCRIPTION E631C372 Aircon Relay which is controled by ECM supplies and cut electrical power to Aircon compressor. ECM activates or deac- DTC DESCRIPTION E0C754B5 P0646 is set when ’0A’ is detected in Aircon relay control circuit for more than 1 sec.. This code is due to open or short DTC DETECTING CONDITION EFF203A7 Item Detecting Condition Possible Cause DTC Strategy • Voltage monitoring Enable Conditions • IG KEY "ON" ThresholdValue • Short to GND, Wiring open DiagnosticTime • 1.0 sec. Fuel Cut NO EGR Off NO Fuel Limit NO Fail Safe MIL NO • A/C relay circuit |