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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 2.0L (LUZ) Diesel - DTC P0016 To DTC P0406) >> Diagnostic Information and Procedures >> DTC P0182 or P0183: Fuel Temperature Sensor Circuit >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF.
  2. Disconnect the B48 Fuel Temperature Sensor connector.
  3. Ignition ON.
  4. Test for 4.8-5.2 V between the Signal circuit terminal 2 and ground.
    • If less than 4.8 V 
    1. Ignition OFF.
    2. Disconnect connector X1 at the K20 Engine Control Module.
    3. Test for less than 2Ω in the Signal circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω.
    4. Test for infinite resistance between the Signal circuit and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • If infinite resistance, replace the K20 Engine Control Module.
    • If greater than 5.2 V 
    1. Ignition OFF.
    2. Disconnect connector X1 at the K20 Engine Control Module.
    3. Ignition ON.
    4. Test for less than 1 V between the Signal circuit and ground.
      • If 1 V or greater, repair the short to voltage in the circuit.
      • If less than 1 V, replace the K20 Engine Control Module.
    • If 4.8 to 5.2 V 
  5. Install a 3 A fused jumper wire between the Signal circuit terminal 2 and the Low Reference circuit terminal 1.
    NOTE: If the fuse opens repair the short to voltage in the low reference circuit.
  6. Verify the scan tool Fuel Temperature Sensor parameter is greater than 119°C (246°F).
    • If less than 120°C (248°F) 
    1. Ignition OFF, ECM powered down.
    2. Test for less than 10 Ω between the Low Reference circuit terminal 1 and ground.
      • If 10Ω or greater, test for an open/high resistance in the circuit. If the circuit tests normal, replace the K20 Engine Control Module.
      • If less than 10Ω.
    3. Disconnect connector X1 at the K20 Engine Control Module.
    4. Ignition ON.
    5. Test for less than 1 V between the Low Reference circuit terminal 1 and ground.
      • If 1 V or greater, repair the short to voltage in the circuit.
      • If less than 1 V, replace the K20 Engine Control Module.
    • If greater than 119°C (246°F) 
  7. Replace the B48 Fuel Temperature Sensor.
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