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P0122, P0123 TP SENSOR EC-189 < COMPONENT DIAGNOSIS > [QR25DE FOR CALIFORNIA] C D E F G H I J K L M A EC N P O P0122, P0123 TP SENSOR Description INFOID:0000000004349233 Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle position sensor responds to the throttle valve movement. The throttle position sensor has two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output voltage, and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the throttle valve and feed the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition. DTC Logic INFOID:0000000004349234 DTC DETECTION LOGIC NOTE: If DTC P0122 or P0123 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 turn ignition switch OFF and wait at least 10 seconds before conducting the next test. TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 8V at idle. >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Start engine and let it idle for 1 second. 2. Check DTC. YES >> Go to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000004349235 1. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E9. Refer to Ground Inspection in . Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace ground connection. 2. CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT 1. Disconnect electric throttle control actuator harness connector. 2. Turn ignition switch ON. PBIB0145E DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0122 Throttle position sensor An excessively low voltage from the TP sensor • Harness or connectors (TP sensor 2 circuit is open or shorted.) • Electric throttle control actuator (TP sensor 2) P0123 Throttle position sensor An excessively high voltage from the TP sensor |