Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC P1011: Intake Camshaft Position (CMP) Actuator Park Position Bank 1DTC P1012: Exhaust Camshaft Position (CMP) Actuator Park Position Bank 1
DTC P1013: Intake Camshaft Position (CMP) Actuator Park Position Bank 2
DTC P1014: Exhaust Camshaft Position (CMP) Actuator Park Position Bank 2
Circuit/System Description
The camshaft position (CMP) actuator system enables the engine control module (ECM) to change the camshaft timing of all 4 camshafts while the engine is operating. The CMP actuator assembly varies the camshaft position in response to directional changes in oil pressure. The CMP actuator solenoid controls the oil pressure that is applied to advance or retard a camshaft.
The CMP actuator assemblies have an outer housing that is driven by the engine timing chain. Inside the CMP assembly is a wheel with fixed vanes that is attached to the camshafts. The CMP actuator assemblies are also equipped with a locking pin. The locking pin prevents movement between the outer housing and the wheel vane assembly on engine start-ups. The CMP actuator is locked until sufficient oil pressure is available to control the CMP actuator. The locking pin is released by oil pressure before any movement in the CMP actuator assembly takes place.
Conditions for Running the DTC
| • | DTCs P0010, P0013, P0016, P0017, P0018, P0019, P0020, P0023, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 are not set. |
| • | The engine is operating for greater than 1 second. |
| • | The ECM completed the CMP actuator solenoid output driver test. |
| • | The engine speed is greater than 1,000 RPM. |
| • | DTCs P1011, P1012, P1013, and P1014 only run once at engine start-up. |
Conditions for Setting the DTC
The ECM detects that a CMP actuator is not in the parked position on an engine start-up. The condition exists for greater than 4 seconds, or for a cumulative of 50 seconds.
Action Taken When the DTC Sets
DTCs P1011, P1012, P1013, and P1014 are Type C DTCs.
Conditions for Clearing the DTC
DTCs P1011, P1012, P1013, and P1014 are Type C DTCs.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Camshaft Actuator System Description
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Start the engine. Verify there is no abnormal engine noise during start up.
- Observe the scan tool DTC information. DTCs P1011, P1012, P1013, and P1014 should not set.
- Inform the customer that the following actions may cause DTCs P1011, P1012, P1013, or P1014 to set:
- Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.
Important: The engine oil level and the oil pressure are critical to the correct operation of the camshaft position (CMP) actuator system. Verify that the engine has the correct oil level and the correct oil pressure before continuing with this diagnostic. Refer to Fluid and Lubricant Recommendations and Oil Pressure Diagnosis and Testing for further information.
| • | Turning the engine OFF while the accelerator pedal is pressed |
| • | Turning the engine OFF while driving |
| • | Pressing the accelerator pedal to start the engine |
Circuit/System Testing
Start the engine.
| ⇒ | If there is an abnormal engine noise, or DTCs P1011, P1012, P1013, or P1014 set, replace the appropriate CMP actuator. |
| ⇒ | If the customers concern is that the engine is stalling, refer to Symptoms - Engine Controls for further diagnosis. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
