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Home >> Isuzu >> 2000 >> Rodeo LSE, 2.2 D >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Self-Diagnostics - 2.2L >> Diagnostic Trouble Code Identification >> DTC P0117: ECT Sensor Circuit Low Input >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board Diagnostic II (OBD-II) system check. See SELF-DIAGNOSTICS - INTRODUCTION article. Go to next step.
  2. Turn ignition on. Using scan tool, read ENG COOL TEMP. If temperature is less than 282°F (139°C), go to step  4. If temperature is 282°F (139°C) or greater, go to next step.
  3. Using scan tool, read and record FAILURE RECORDS data. Operate vehicle within conditions noted in FAILURE RECORDS data. Using scan tool, read specified DTC. If scan tool displays DTC P0117 FAILED THIS IGN, go to next step. If scan tool does not display DTC P0117 FAILED THIS IGN, see DIAGNOSTIC AIDS .
  4. Disconnect ECT sensor harness connector. Using scan tool, read ENG COOL TEMP. If reading is at or below -38°F (-39°C), go to step  6. If reading is more than specified, go to next step.
  5. Turn ignition off. Disconnect PCM connectors. Check for faulty circuit between ECT sensor harness connector Blue/Red wire (sensor input) and PCM White 32-pin harness connector terminal E9. Repair as necessary. Retest system. If no problem was found, go to step  7.
  6. Replace ECT sensor. Retest system.
  7. Replace and reprogram PCM using required equipment. See PROGRAMMING . Retest system.
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