general information - Martin Nez

4-42 FI SYSTEM DIAGNOSIS“C14” (P0120-H/L) TP SENSOR CIRCUIT MALFUNCTIONDETECTED CONDITIONC14 Output voltage is not within the followingrange.Difference between actual throttle openingand opening calculated by ECM islarger than specified value.0.2 V Sensor voltage < 4.8 VP0120 Sensor voltage is higher than specifiedHvalue.Sensor voltage is lower than specifiedLvalue.POSSIBLE CAUSE• TP sensor maladjusted• TP sensor circuit open or short• TP sensor malfunction• ECM malfunction• TP sensor circuit shorted to VCC or ground circuitopen• TP sensor circuit open or shorted to ground orVCC circuit openTP sensorECMRVCCP/BTPB/BrE2INSPECTIONStep 1 (When indicating C14:)1) Turn the ignition switch to OFF.2) Lift and support the fuel tank. (5-3)3) Remove the air cleaner box and lift up the throttle body.(5-13)4) Check the TP sensor coupler for loose or poor contacts.If OK, then measure the TP sensor input voltage.5) Disconnect the TP sensor coupler.6) Turn the ignition switch ON.7) Measure the voltage at the Red wire B and ground.8) If OK, then measure the voltage at the Red wire B and B/Brwire C.1