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EC9-236 < DTC/CIRCUIT DIAGNOSIS > [R9M] P0403 EGR VOLUME CONTROL VALVE P0403 EGR VOLUME CONTROL VALVE DTC Logic INFOID:0000000010309164 DTC DETECTION LOGIC NOTE: . DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON and wait at least 1 second. 2. Check DTC. Is DTC detected? YES >> Proceed to EC9-236, "Diagnosis Procedure" . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000010502693 1. CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE Visually check high pressure EGR volume control valve for chipping. Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace error-detected parts. 2. CHECK ECM HARNESS CONNECTOR CONNECTIONS Check ECM harness connector connection. Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace error-detected parts. 3. CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE HARNESS CONNECTOR CONNECTIONS Check high pressure EGR volume control valve harness connector connection. YES >> GO TO 4. NO >> Repair or replace error-detected parts. 4. CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Check high pressure EGR volume control valve circuit for open and short. DTC No. CONSULT screen terms (Trouble diagnosis con- tent) DTC detecting condition Possible cause P0403 EGR VLV CMD CIRC TEMPERATURE TOO • ECM detects high Pressure EGR volume control valve command circuit is short to ground. • ECM detects high Pressure EGR volume control valve command circuit is short to power. • ECM detects an over temperature of high Pressure EGR volume control valve. • Harness or connectors (High Pressure EGR volume control • High Pressure EGR volume control valve |