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EC-432 < DTC/CIRCUIT DIAGNOSIS > [MRA8DE] P2122, P2123 APP SENSOR P2122, P2123 APP SENSOR DTC Logic INFOID:0000000009758689 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 procedure before conducting 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 8 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:0000000009758690 1. CHECK APP SENSOR 1 POWER SUPPLY 1. Turn ignition switch OFF. 2. Disconnect accelerator pedal position (APP) sensor harness connector. 3. Turn ignition switch ON. 4. Check the voltage between APP sensor harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> GO TO 2. DTC No. CONSULT screen terms (Trouble diagnosis con- tent) DTC detecting condition Possible cause P2122 APP SEN 1/CIRC 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 APP SEN 1/CIRC An excessively high voltage from the APP + − Voltage (Approx.) APP sensor Connector Terminal E12 4 Ground 5.0 V |