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Home >> Isuzu >> 2001 >> Rodeo S, 2.2 D, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.2L >> Diagnostic Tests >> DTC P0113: IAT Sensor Circuit High Input >> Diagnostic Procedures
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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 IAT value. If temperature reading is less than 5 volts, -36°F (-38°C), go to step  4 . If temperature reading is more than specified, 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 P0113 FAILED THIS IGN, test IAT sensor. Using a DVOM, measure resistance across sensor terminals. See IAT SENSOR RESISTANCE  table. Replace IAT sensor if resistance is not as specified. If scan tool does not display DTC P0113 FAILED THIS IGN, go to DIAGNOSTIC AIDS  .
  4. Turn ignition off. Disconnect IAT sensor harness connector. Using a fused jumper wire, connect terminals of IAT sensor harness connector. Turn ignition on. Using scan tool, read IAT value. If reading is zero volts and 284°F (140°C), go to step  6 . If reading is not as specified, go to next step.
  5. Turn ignition off. Connect jumper between IAT sensor harness connector Yellow/Green wire and ground. Turn ignition on and observe IAT sensor value. If reading is zero volts and 284°F (140°C), go to step  7 . If reading is not as specified, go to step  8 .
  6. Check for poor connections at IAT sensor and harness connector. Repair as necessary. If terminals and connector are okay, go to step  10 .
  7. Turn ignition off. Disconnect PCM harness connector. Check IAT sensor ground (Gray/Black wire) for an open circuit between IAT sensor harness connector and PCM harness connector terminal D9. See Figure and Figure . Repair as necessary. Retest system. If IAT ground circuit is okay, go to step  9 .
  8. Turn ignition off. Disconnect PCM harness connector. Check IAT sensor input (Yellow/Green wire) for an open circuit between PCM harness connector terminal B8 and IAT sensor harness connector. See Figure and Figure . Repair as necessary. Retest system. If IAT sensor input circuit is okay, go to next step.
  9. Check PCM and IAT sensor harness connectors for poor connections or damaged terminals. Repair as necessary. Retest system. If terminals are okay, go to step  11 .
  10. Replace IAT sensor. Retest system.
  11. Replace and reprogram PCM using required equipment. See PROGRAMMING  . Retest system.
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