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EC-406 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P2127, P2128 APP SENSOR P2127, P2128 APP SENSOR DTC Logic INFOID:0000000009651262 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- 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: >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Start engine and let it idle for 1 second. 2. Check DTC. Is DTC detected? YES >> Proceed to . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000009651263 1. CHECK APP SENSOR 2 POWER SUPPLY 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 5. NO >> GO TO 2. 2. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. DTC No. Trouble diagnosis name DTC detecting condition Possible cause P2127 Accelerator pedal posi- An excessively low voltage from the APP sen- • Harness or connectors (APP sensor 2 circuit is open or shorted.) • Accelerator pedal position sensor (APP sensor 2) • Crankshaft position sensor (POS) P2128 Accelerator pedal posi- An excessively high voltage from the APP sen- APP sensor Ground Voltage (V) Connector Terminal E110 5 Ground Approx. 5 |