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Home >> Mitsubishi >> 2001 >> Eclipse GS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0122: Throttle Position (TP) Sensor Circuit Low Input >> Diagnostic Procedure (2.4L)
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Diagnostic Procedure (2.4L)

  1. Turn ignition on. Using scan tool, check data list item No. 14 (throttle position sensor). With throttle valve in idle position, voltage should be 0.535-0.735 volt. With throttle valve in fully open position, voltage should be 4.5-5.5 volts. If voltages are as specified, problem is intermittent. See INTERMITTENT DIAGNOSTIC TROUBLE CODES  . If voltages are not as specified, go to next step.
  2. Turn ignition off. Disconnect TP sensor 4-pin connector. Check TP sensor connector for loose, damaged or corroded terminals. If problem exists, repair connector, then go to step  9 . If problem does not exist, go to next step.
  3. Measure resistance between TP sensor connector terminals No. 1 and 4 (component side). See Figure . Resistance should be 3.5-6.5 k/ohms. Measure resistance between TP sensor connector terminals No. 1 and 3 (component side) while slowly opening throttle valve from idle position to fully open position. Resistance should change smoothly in proportion to opening of valve. If resistance is not as specified or does not change smoothly in proportion to throttle opening, replace TP sensor, then go to step  9 . If resistance is as specified, go to next step.
  4. Check TP sensor adjustment by measuring output voltage. See TP SENSOR ADJUSTMENT under THROTTLE POSITION SENSOR & ACCELERATOR PEDAL POSITION SENSOR in ON-VEHICLE ADJUSTMENTS article. If voltage is as specified, go to next step. If voltage is not as specified, adjust TP sensor, then go to step  9 .
  5. Turn ignition off. Check ECM connector C-60 or PCM connectors C-54 and C-57 for loose, damaged or corroded terminals. If problem exists, repair connector, then go to step  9 . If problem does not exist, go to next step.
  6. Check for damage to Green/Yellow wire between TP sensor connector terminal No. 4 and ECM connector C-60 terminal No. 81 or PCM connector C-54 terminal No. 46. See Figure and Figure . If problem exists, repair Green/Yellow wire, then go to step  9 . If problem does not exist, go to next step.
  7. Check for damage to Yellow wire between TP sensor connector terminal No. 3 and ECM connector C-60 terminal No. 84 or PCM connector C-57 terminal No. 78. If problem exists, repair Yellow wire, then go to step  9 . If problem does not exist, go to next step.
  8. Turn ignition on. Using scan tool, check data list item No. 14 (throttle position sensor). With throttle valve in idle position, voltage should be 0.535-0.735 volt. With throttle valve in fully open position, voltage should be 4.5-5.5 volts. Turn ignition off. If voltages are as specified, problem is intermittent. See INTERMITTENT DIAGNOSTIC TROUBLE CODES  . If voltages are not as specified, replace ECM/PCM, then go to next step.
  9. Test drive vehicle following OBD-II drive cycle other monitor pattern. See OTHER MONITOR  under OBD-II DRIVE CYCLES under VERIFYING REPAIRS. Check for DTCs. If DTC P0122 is output, retry diagnostic procedure. If DTC P0122 is not output, inspection is complete.
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