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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L - DTCS P1E3A-00 To P2227-00 >> Diagnosis And Testing >> P1E55-00-WASTEGATE Position Sensor "A" Out Of Range Low >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, read and record DTCs and Freeze Frame data on the repair order.

      Is the DTC active or pending?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR HIGH RESISTANCE IN THE (F856) 5-VOLT SUPPLY CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the Wastegate Solenoid harness connector.
    3. Disconnected PCM C2 harness connector.
    4. Measure the resistance of the (F856) 5-Volt Supply circuit between the Wastegate Solenoid harness connector and the PCM C2 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  3

      No 

      • Repair the high resistance in the (F856) 5-Volt Supply circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  3. CHECK FOR HIGH RESISTANCE IN THE (K137) WASTEGATE POSITION SIGNAL CIRCUIT 
    1. Measure the resistance of the (K137) Wastegate Sensor Signal circuit between the Wastegate Solenoid harness connector and the PCM C2 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  4

      No 

      • Repair the high resistance in the (K137) Wastegate Position Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  4. CHECK FOR HIGH RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT 
    1. Measure the resistance of the (K900) Sensor Ground circuit between the Wastegate Solenoid harness connector and the PCM C2 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      No 

      • Repair the high resistance in the (K900) Sensor Ground circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .