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Home >> Mitsubishi >> 2002 >> Eclipse GS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self Diagnostics - 2.4L >> Diagnostic Tests >> DTC P0111: Intake Air Temperature Circuit Range/Performance Problem >> Diagnostic Procedure
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Diagnostic Procedure

CAUTION: To prevent damage to Scan Tool (MB991502), always turn the ignition off before connecting or disconnecting the scan tool.
  1. Connect Scan Tool (MB991502) to the data link connector. Remove the air intake hose from the volume air flow sensor. Turn the ignition on. Set the scan tool to data reading mode for item 13, Intake Air Temperature Sensor. Heat the sensor using a hair drier. Do NOT allow the temperature to exceed 176°F (80°C). Turn the ignition off and attach the air intake hose. If the sensor is operating properly, it can be assumed that this malfunction is intermittent, refer to INTERMITTENT DIAGNOSTIC TROUBLE CODES . If the sensor is malfunctioning, go to next step.
  2. Disconnect the intake air temperature sensor connector B-14. Measure the resistance between intake air temperature sensor side connector terminal 5 and 6. Measure resistance while heating the sensor using a hair drier. If the resistance is at the standard value, go to next step. If the resistance is off, replace the volume air flow sensor and go to step  9.
  3. Check connector B-14 at the intake air temperature sensor for damage. If the connector is in good condition, go to next step. If the connector is damaged, repair or replace it and go to step  9.
  4. Disconnect the connector B-14 and measure at the harness side. Check the continuity between terminal 5 and ground. See Figure. The resistance should be less than 2 ohm. If the continuity is normal, go to step  7, otherwise go to next step.
  5. Check connector C-53 at ECM (M/T) or connector C-50 at PCM (A/T) for damage. See Figure or Figure . If the connector is in good condition, go to next step. If the connector is damaged, repair or replace it and go to step  9.
  6. Check for open circuit and harness damage between intake air temperature sensor connector B-14 and ECM connector C-53 (M/T) or PCM connector C-50 (A/T). If the harness wire is in good condition, replace the ECM or PCM and go to step  9. If the harness wire is damaged, repair it and go to step  9.
  7. Check connector C-60 at ECM (M/T) or connector C-54 at PCM (A/T) for damage. See Figure or Figure . If the connector is in good condition, go to next step. If the connector is damaged, repair or replace it and go to step  9.
  8. Check for open circuit and harness damage between intake air temperature sensor connector B-14 and ECM connector C-60 (M/T) or PCM connector C-54 (A/T). If the harness wire is in good condition, replace the ECM or PCM and go to next step. If the harness wire is damaged, repair it and go to next step.
  9. Carry out a test drive with the drive cycle pattern (OBD-II), refer to OTHER MONITOR . Check for diagnostic trouble codes. If DTC P0111 is output, retry the troubleshooting. If the code is absent, the inspection is complete.
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