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Home >> Mitsubishi >> 2002 >> Eclipse RS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self Diagnostics - 2.4L >> Diagnostic Tests >> DTC P0183: Fuel Temperature Sensor Circuit High Input >> 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. Turn the ignition on. Set the scan tool to data reading mode for item 4A, Fuel Temperature Sensor. Approximately the same as the outside temperature when the engine is cooled. Turn the ignition off. 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. Check connector D-17 at the fuel temperature sensor for damage. See 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  11.
  3. Disconnect the fuel temperature sensor connector D-17. Measure the resistance between terminal 1 and 3 of the fuel temperature sensor. If the resistance is at the standard value, go to next step. If the resistance is out of range, replace the fuel temperature sensor and go to step  11.
  4. Disconnect the connector D-17 and measure at the harness side. See Figure. Turn the ignition on. Measure the voltage between terminal 3 and ground. Voltage should be between 4.5-4.9 volts. Turn the ignition off. If the voltage is normal, go to step  8, otherwise go to next step.
  5. Check the sensor supply voltage at ECM connector C-60 (M/T) or PCM connector C-54 (A/T) by backprobing. See Figure or Figure . Do not disconnect the ECM connector C-60 (M/T) or PCM connector C-54 (A/T). Disconnect the fuel temperature sensor connector D-17. Turn the ignition on. Measure the voltage between terminal 77 (M/T) or 51 (A/T) and ground by backprobing. Voltage should be between 4.5-4.9 volts. Turn the ignition off. If the voltage is normal, go to next step, otherwise, go to step  7.
  6. Check connector C-60 at ECM (M/T) or connector C-54 at PCM (A/T) for damage. If the connector is in good condition, check connector C-28 and C-90 at intermediate connector for damage, and repair and replace as required. If intermediate connector is in good condition, repair harness wire between fuel temperature sensor connector D-17, terminal 3 and ECM connector C-60, terminal 77 (M/T) or PCM connector C-54, terminal 51 (A/T) (because of open circuit) and go to step  11. If the connector is damaged, repair or replace it and go to step  11.
  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, replace the ECM or PCM and go to step  11. If the connector is damaged, repair or replace it and go to step  11.
  8. Check the continuity at fuel temperature sensor harness side connector D-17. See Figure. Disconnect the connector D-17 and measure at the harness side. Check for continuity between terminal 1 and ground. The resistance should be less than 2 ohm. If the continuity is normal, go to next step. If the continuity is abnormal, repair harness wire between fuel temperature sensor connector D-17, terminal 1 and ground (because of open circuit or harness damage) and go to step  11.
  9. 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  11.
  10. Check for open circuit and harness damage between fuel temperature sensor connector D-17 and ECM connector C-60 (M/T) or PCM connector C-54. See Figure, Figure or Figure . Check harness after checking intermediate connector C-90 and C-28. See Figure. If intermediate connector is damaged, repair or replace it and proceed to next step. 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.
  11. Carry out a test drive with the drive cycle pattern (OBD-II). Check the diagnostic trouble codes. If DTC P0183 is output, retry the troubleshooting. If the DTC is absent, the inspection is complete.
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