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P2122, P2123 APP SENSOR EC-291 < DTC/CIRCUIT DIAGNOSIS > [HR16DE] C D E F G H I J K L M A EC N P O P2122, P2123 APP SENSOR DTC Logic INFOID:0000000009022654 DTC DETECTION LOGIC NOTE: If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to . DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- ing the next test. 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 10 V at idle. >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Start engine and let it idle for 1 second. 2. Check DTC. YES >> Proceed to . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000009022655 1. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E15. Refer to Ground Inspection in . Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace ground connection. 2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT 1. Disconnect accelerator pedal position (APP) sensor harness connector. 2. Turn ignition switch ON. 3. Check the voltage between APP sensor harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair open circuit or short to ground or short to power in harness or connectors. DTC No. Trouble diagnosis name DTC detecting condition Possible cause P2122 Accelerator pedal position An excessively low voltage from the APP • Harness or connectors (APP sensor 1 circuit is open or shorted.) • Accelerator pedal position sensor (APP sensor 1) P2123 Accelerator pedal position An excessively high voltage from the APP APP sensor Ground Voltage (Approx.) Connector Terminal E12 4 Ground 5 V |