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Home >> Fiat >> 2017 >> 500 Lounge, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 37 (1.4L Turbo - DTCS P1043-00 To P2115-00 - 500) >> DTC Troubleshooting >> P1CEA-00 Boost Side EVAP Purge System Performance >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR APPLICABLE SERVICE BULLETINS AND VEHICLE HISTORY 
    1. Turn the ignition on.
    2. With the scan tool, read DTCs and record on the repair order.
    3. Whether or not any DTCs are active you will want to check the following items which may assist in repairing the customer's complaint successfully.
      • Check the vehicle's repair history.
      • If the vehicle has a repair history that pertains to the customer's current complaint, review the repair.
      • Inspect the vehicle for any aftermarket accessories that may have been installed incorrectly.
      • Check for any service bulletin(s) related to the customer's complaint or DTCs.
      • If a service bulletin applies, follow the instructions per the service bulletin.

      Choose the following scenario that applies.

      A service bulletin repaired the customer's complaint. 

      • Testing complete.

      A DTC is present, no service bulletins apply or the service bulletin didn't repair the customer's complaint. 

      • Go To  2
  2. CHECK FOR AN ACTIVE DTC 
    1. Start the engine.
    2. Test drive the vehicle in accordance with the set conditions.
    3. With the scan tool, read DTCs.
      NOTE:

      If any other DTC sets, active or pending, perform the diagnostic procedure for that DTC before proceeding with this test.

      Is the DTC active or pending?

      Yes 

      • Go To  3

      No 

  3. CHECK FOR OTHER DTCS 
    1. Refer to the recorded DTCs.

      Are there any Fuel Tank Pressure Sensor or Purge Solenoid DTCs active or pending?

      Yes 

      No 

      • Go To  4
  4. CHECK THE (N8) FTP SENSOR SUPPLY VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the FTP Sensor harness connector.
    3. Turn the ignition on.
    4. Measure the voltage on the (N8) FTP Sensor Supply circuit at the FTP Sensor harness connector.

      Is the voltage between 4.8 and 5.2 volts?

      Yes 

      • Go To  5

      No 

      • Repair the (N8) FTP Sensor Supply circuit for an open circuit or short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  5. CHECK FOR HIGH RESISTANCE IN THE (N70) FTP SENSOR SIGNAL CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the PCM C1 harness connector.
    3. Measure the resistance of the (N70) FTP Sensor Signal circuit between the FTP Sensor harness connector and the PCM C1 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the (N70) FTP Sensor Signal circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  6. CHECK FOR HIGH RESISTANCE IN THE (N10) FTP SENSOR RETURN CIRCUIT 
    1. Measure the resistance of the (N10) FTP Sensor Return circuit between the FTP Sensor harness connector and the PCM C1 harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  7

      No 

      • Repair the (N10) FTP Sensor Return circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. CHECK THE EJECTOR TEE FOR PROPER OPERATION 
    NOTE:

    The Ejector Tee is an integrated part of the Air Cleaner Box.

    1. Turn the ignition off.
    2. Disconnect the Ejector Tee hose that connects to the Proportional Purge Solenoid (PPS) at the other end. Connect a vacuum gauge to the Ejector Tee.
      NOTE:

      This is the hose that has the elbow on the end that connects to the Ejector Tee.

    3. Disconnect the Ejector Tee hose that connects to the Charge Air Cooler (CAC) port at the other end.
    4. Using regulated shop air (no higher than 12.0 psi), blow air into the CAC port while monitoring the vacuum gauge connected to the PPS port.

      Was vacuum created when applying shop air to the CAC port?

      Yes 

      • Go To  8

      No 

      • Replace the Air Cleaner Box in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  8. VISUALLY INSPECT THE TURBO RELATED EVAPORATIVE SYSTEM TUBES FOR DAMAGE CAUSING A LEAK OR OBSTRUCTION 
    1. Turn the ignition off.
    2. Perform a visual and physical inspection of the Turbo related Evaporative Emission system components. Check for the following conditions:
      • Verify the flow direction arrow on the tee on the boost vacuum purge harness is pointing from the Charge Air Cooler (CAC) (high pressure) to the air induction (low pressure)
      • Check for the Purge Solenoid tube to be pinched/bent/blocked or leaking between the Purge Solenoid and the Ejector Tee
      • Check for blockage/obstruction or leak between CAC port on the CAC Cooler Duct and the Ejector Tee
      • Check for the purge hose to be pinched/bent/blocked between Purge Solenoid, Fuel Tank and Charcoal Canister

      Were any of the above conditions found?

      Yes 

      No 

      • Go To  9
  9. CHECK THE PURGE SOLENOID FOR PROPER OPERATION 
    WARNING:

    Keep lit cigarettes, sparks, flames, and other ignition sources away from the test area to prevent the ignition of explosive gases, Keep the test area well ventilated.

    1. Disconnect the purge tube from the Purge Solenoid (this is the tube that comes from the Charcoal Canister).
    2. Using a hand vacuum pump connected to the Purge Solenoid, apply 5.0 inches Hg to the "CAN" side of the Purge Solenoid.
    3. Turn the ignition on.
    4. With the scan tool, actuate the Purge Solenoid to on.
      NOTE:

      The vacuum should be purged immediately when the Purge Solenoid is energized.

      Did the vacuum purge after the Purge Solenoid is actuated?

      Yes 

      • Go To

      No 

      • Replace the Purge Solenoid in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  10. REPLACE THE FUEL TANK PRESSURE SENSOR AND RETEST FOR DTC 
    1. Replace the FTP Sensor in accordance with the service information. Refer to SENSOR, FUEL TANK PRESSURE, REMOVAL .
    2. Connect the FTP Sensor and PCM harness connectors.
    3. Turn the ignition on.
    4. With the scan tool, erase DTCs.
    5. Using the recorded Freeze Frame and the When Monitored conditions, operate the vehicle in the conditions that set the DTC.
    6. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  11

      No 

  11. CHECK RELATED PCM AND COMPONENT CONNECTIONS 
    1. Perform any Service Bulletins that apply.
    2. Disconnect all PCM harness connectors.
    3. Disconnect all related in-line harness connections (if equipped).
    4. Disconnect the related component harness connectors.
    5. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    6. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    9. With the scan tool, erase DTCs.
    10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    11. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

      • The wiring or poor connection problem has been repaired.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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