LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Isuzu >> 2001 >> Rodeo S, 2.2 D, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.2L >> Diagnostic Tests >> DTC P0117: ECT Sensor Circuit Low Input >> Diagnostic Procedures
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Procedures

  1. Perform OBD-II system check. See ON-BOARD DIAGNOSTIC II (OBD-II) SYSTEM CHECK  . After performing OBD-II system check, go to next step.
  2. Turn ignition on. Using scan tool, read ENG COOL TEMP display. 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, monitor specified DTC parameters. 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 display. If reading is -38°F (-39°C) or less, go to step  6 . If reading is more than specified, go to next step.
  5. Turn ignition off. Disconnect PCM harness connectors. Check for faulty circuit in Blue/Red wire between ECT sensor harness connector and PCM harness connector terminal E9. See Figure and Fig 1 . 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.
Fig 1: Identifying ECT Sensor Circuit
G00049066Courtesy of ISUZU MOTOR CO.
scientia non olet · About LEMON Manuals