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EC9-240 < DTC/CIRCUIT DIAGNOSIS > [R9M] P0470 EXHAUST GAS PRESSURE SENSOR P0470 EXHAUST GAS PRESSURE SENSOR DTC Logic INFOID:0000000010309172 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 5 second. 2. Check DTC. Is DTC detected? YES >> Proceed to EC9-240, "Diagnosis Procedure" . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000010309173 1. CHECK ECM HARNESS CONNECTOR CONNECTIONS 1. Turn ignition switch OFF. 2. Check ECM harness connector connection. Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace error-detected parts. 2. CHECK EXHAUST GAS PRESSURE SENSOR HARNESS CONNECTOR CONNECTIONS Check exhaust gas pressure sensor harness connector connection. Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace error-detected parts. 3. CHECK EXHAUST GAS PRESSURE SENSOR POWER SUPPLY CIRCUIT Check the power supply of the exhaust gas pressure sensor. Is the inspection result normal? YES >> GO TO 4. DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P0470 TBN UPSTR PRS SEN CIRC • An excessively low voltage from the sensor is sent to ECM. • An excessively high voltage from the sensor is sent to ECM. Exhaust gas pressure sensor + - Voltage (Approx.) Exhaust gas pressure sensor Connector Terminal F135 3 Ground 5 V |