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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (2.9L Pcm 2 - DTCS C1260-00 To P0276-00) >> DTC Troubleshooting >> P000C-00-Bank 2 Camshaft 1 Position Slow Response >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR APPLICABLE SERVICE BULLETINS 
    1. Check for any Service Bulletins that may apply for this issue.

      Were any Service Bulletins applicable?

      Yes 

      • Perform the applicable Service Bulletin. Erase the DTC and perform the verification test.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK FOR OTHER DTCS 
    1. With the scan tool, read and record DTCs and Freeze Frame Data.

      Are there any system voltage, Oil Pump Control Circuit or Camshaft Position Solenoid Circuit Open DTCs active or pending?

      Yes 

      • Perform the applicable diagnostic procedure(s). Refer to DTC INDEX .

      No 

      • Go To  4
  4. CHECK THE ENGINE OIL LEVEL AND CONDITION 
    1. Turn the ignition off.
    2. The following items should be checked before continuing with this procedure. Failure to do so may lead to misdiagnosis.
      • LOW ENGINE OIL LEVEL
      • AERATED ENGINE OIL
      • INCORRECT ENGINE OIL FILTER (DOES NOT MEET OEM SPECIFICATIONS)
      • DETERIORATED OR DIRTY OIL
      • CONTAMINATED ENGINE OIL
      • INCORRECT ENGINE OIL VISCOSITY

      Were any of the above conditions present?

      Yes 

      • Repair the engine oiling or mechanical condition (i.e. improper oil drain back, oil sludge, damaged oil pump, pick-up tube or seal, etc.).
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To 5
  5. CHECK THE CAM PHASER OPERATION 
    NOTE:

    It may be necessary to drive the vehicle to allow the Cam Phaser to operate normally and then return to lock pin at idle. The purpose is to check for a phaser that may not be responding quick enough and causing this DTC.

    1. With the scan tool, monitor and compare the CMP Sensor 2/2 desired  position value with the CMP Sensor 2/2 actual  position value with the engine running at idle. After comparing the two values at idle, check and compare the values at several different engine speeds. The best way to do this is to raise the engine speed quickly and hold steady for up to 30 seconds and monitor the actual and desired values. Then lower the engine speed and hold steady at a level above idle (off of lock pin) for up to 30 seconds and monitor the actual and desired values. Repeat this a few times up and down monitoring the values and then allow the engine to come back to idle and monitor the actual position to verify that the phaser is coming back to lock pin position.
      NOTE:

      The purpose of this step is to determine if the Cam Phaser or Oil Control Valve is binding or dragging due to a mechanical or oiling system issue. We are looking for the actual position to respond and quickly mirror the desired position, not necessarily for it to achieve the desired position.

      Is the actual Cam Phaser position changing quickly and mirroring the desired Cam Phaser position?

      Yes 

      No 

      • Go To  6
  6. CHECK THE ENGINE OIL PRESSURE AND ENGINE MECHANICAL CONDITION 
    1. Remove the EOP Sensor near the Oil Filter and install an oil pressure gauge on the engine.
    2. Start the engine and allow it to idle.
    3. Monitor the engine oil pressure reading on the gauge.

      Is the oil pressure reading steady and above the engine specifications?

      Yes 

      • Go To  7

      No 

      • Repair the engine oiling or mechanical condition (i.e. low engine oil, incorrect engine oil viscosity, contaminated or deteriorating engine oil, improper oil drain back or blocked screen in cylinder head, oil sludge, damaged oil pump, pick-up tube or seal, incorrect engine oil filter (DOES NOT MEET OEM SPECIFICATIONS) etc.).
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. CHECK THE OIL PRESSURE IN THE CYLINDER HEAD 
    1. Remove the EOP Sensor in the Cylinder Head and install an oil pressure gauge.
    2. Start the engine and allow it to idle.
    3. Monitor the engine oil pressure reading on the gauge.

      Is the oil pressure reading relatively close to the oil pressure reading taken at the engine block?

      Yes 

      • Go To  8

      No 

  8. REPLACE THE CAMSHAFT OIL CONTROL VALVE 2/1 AND CHECK OPERATION 
    1. Turn the ignition off.
    2. Replace the Camshaft Oil Control Valve 2/1 in accordance with the Service Information. Refer to ASSEMBLY, VARIABLE VALVE TIMING, PHASER / OIL CONTROL VALVE, REMOVAL AND INSTALLATION .
    3. Reconnect the Camshaft Oil Control Valve 2/1 harness connector.
      NOTE:

      It may be necessary to drive the vehicle to allow the Cam Phaser to operate normally and then return to lock pin at idle. The purpose is to check for a phaser that may not be responding quick enough and causing this DTC.

    4. With the scan tool, monitor and compare the CMP Sensor 2/2 desired  position value with the CMP Sensor 2/2 actual  position value with the engine running at idle. After comparing the two values at idle, check and compare the values at several different engine speeds. The best way to do this is to raise the engine speed quickly and hold steady for up to 30 seconds and monitor the actual and desired values. Then lower the engine speed and hold steady at a level above idle (off of lock pin) for up to 30 seconds and monitor the actual and desired values. Repeat this a few times up and down monitoring the values and then allow the engine to come back to idle and monitor the actual position to verify that the phaser is coming back to lock pin position.

      Is the actual Cam Phaser position changing quickly and mirroring the desired Cam Phaser position?

      Yes 

      • Replacing the Camshaft Oil Control Valve 2/1 repaired the fault.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  9
  9. REPLACE THE CAMSHAFT 2/1 PHASER AND CHECK OPERATION 
    1. Turn the ignition off.
    2. Replace the Camshaft 2/1 Phaser in accordance with the Service Information. Refer to ASSEMBLY, VARIABLE VALVE TIMING, PHASER / OIL CONTROL VALVE, REMOVAL AND INSTALLATION .
      NOTE:

      It may be necessary to drive the vehicle to allow the Cam Phaser to operate normally and then return to lock pin at idle. The purpose is to check for a phaser that may not be responding quick enough and causing this DTC.

    3. With the scan tool, monitor and compare the CMP Sensor 2/2 desired  position value with the CMP Sensor 2/2 actual  position value with the engine running at idle. After comparing the two values at idle, check and compare the values at several different engine speeds. The best way to do this is to raise the engine speed quickly and hold steady for up to 30 seconds and monitor the actual and desired values. Then lower the engine speed and hold steady at a level above idle (off of lock pin) for up to 30 seconds and monitor the actual and desired values. Repeat this a few times up and down monitoring the values and then allow the engine to come back to idle and monitor the actual position to verify that the phaser is coming back to lock pin position.

      Is the actual Cam Phaser position changing quickly and mirroring the desired Cam Phaser position?

      Yes 

      No 

      • Go To  10
  10. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all PCM-2 harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. 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.

    5. Connect all PCM-2 harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    10. 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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