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Home >> Mitsubishi >> 2002 >> Eclipse GS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self Diagnostics - 2.4L >> Diagnostic Tests >> DTC P0461: Fuel Level Sensor Circuit Range/Performance >> 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 4B, Fuel Level Sensor. When the fuel gauge is near "FULL", voltage should be 100-3600 millivolts. When the fuel gauge is near "EMPTY", voltage should be 2700-6200 millivolts. 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 gauge unit for damage. See Figure. If the connector is in good condition, go to next step, otherwise, repair or replace it and go to step  12.
  3. Check the continuity at fuel gauge unit harness side connector D-17. 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, otherwise, repair harness wire between fuel gauge unit connector D-17, terminal 1 and ground (because of open circuit or harness damage) and go to step  12.
  4. Check the sensor supply voltage at fuel gauge unit harness side connector D-17. See Figure. Disconnect the connector D-17 and measure at the harness side. Disconnect the combination connector C-41. See Figure. Turn the ignition on. Measure the voltage between terminal 2 and ground. Voltage should be battery positive voltage. Turn the ignition off. If the resistance is normal, go to step  9, 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 combination meter connector C-41. Turn the ignition on. Measure the voltage between terminal 74 (M/T) or terminal 60 (A/T) and ground by backprobing. When the fuel gauge is near "FULL", voltage should be 0.1 and 3.6 volts. When the fuel gauge is near "EMPTY", voltage should be 2.7 and 6.2 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. See Figure or Figure .If the connector is in good condition, check connector C-90 and C-28 at intermediate connector for damage, and repair or replace as required. If intermediate connector is in good condition, repair harness wire between fuel gauge unit connector D-17, terminal 2 and ECM connector C-60, terminal 74 (M/T) or PCM connector C-54, terminal 60 (A/T - because of open circuit) and go to step  12. If the connector is damaged, repair or replace it and go to step  12.
  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, otherwise, repair or replace it and go to step  12.
  8. Check for short circuit to ground between fuel gauge unit connector D-17, terminal 2 and ECM connector C-60, terminal 74 (M/T) or PCM connector C-54, terminal 60 (A/T). See Figure, Figure or Figure . If the harness wire is in good condition, replace the ECM or PCM and go to step  12, otherwise, repair it and go to step  12.
  9. Check the fuel gauge unit. If the fuel gauge unit is normal, go to next step, otherwise, replace the fuel gauge unit and go to step  12.
  10. 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, otherwise, repair or replace it and go to step  12.
  11. Check for harness damage between fuel gauge unit connector D-17, terminal 2 and ECM connector C-60, terminal 74 (M/T) or PCM connector C-54, terminal 60 (A/T). See Figure, Figure or Figure . If the harness wire is in good condition, replace the ECM or PCM and go to next step, otherwise, repair it and go to next step.
  12. Carry out a test drive with the drive cycle pattern (OBD-II). Check the diagnostic trouble codes. If DTC P0460 is output, retry the troubleshooting. If the DTC is absent, the inspection is complete.
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