P0011
DTC P0011
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P0011
- Camshaft Position (CMP) System Performance
Diagnostic Fault Information
Circuit/System Description
The camshaft position (CMP) actuator system enables the engine control module (ECM) to change the timing of the camshaft while the engine is operating. The ECM controls the Camshaft Position Actuator Magnet duty cycle by controlling the amount of ON time. The magnet controls the amount of engine oil flow to the CMP actuator by extending a pintle within the solenoid. The pintle acts against a spool valve in the CMP actuator mechanism which is attached to the front of the camshaft. As the spool valve is moved, oil is directed to the CMP actuator, which rotates the camshaft. The ECM can only command the camshaft position actuator to retard the valve timing from the camshaft park position, or advance the valve timing back to the park position.
The ECM controls the Camshaft Position Actuator Magnet by suppling a 12 V pulse width modulated (PWM) signal. The ECM supplies a ground to the low reference circuit.
Conditions for Running the DTC
* DTC P0010, P0016, P0335, P0336, P0340, or P0341 are not set.
* The system voltage is between 11-18 volts.
* The engine is running.
* The desired CMP position is greater than 0 degrees.
* The CMP actuator is commanded ON.
* The CMP angle is stable within 7.5 degrees.
* DTC P0011 runs continuously when the above conditions are met.
Conditions for Setting the DTC
The difference between the desired CMP and the actual CMP angle is greater than 8 degrees for 30 s.
Action Taken When the DTC Sets
* DTC P0011 is a Type B DTC.
* The CMP actuator is commanded to the home or parked position.
Conditions for Clearing the MIL/DTC
DTC P0011 is a Type B DTC.
Diagnostic Aids
* Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, or timing chain can cause this DTC to set.
* The engine oil condition has a major impact on the camshaft actuator system.
* A low oil level condition may set this DTC. The engine may require an oil change. Inquire with the customer when the last oil change was performed. You may also monitor the scan tool Engine Oil Life parameter. Advise the customer an oil change may be required.
Reference Information
Schematic Reference
Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Description and Operation
Camshaft Actuator System Description (Camshaft Actuator System)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
Note:
* 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 Oil Pressure Diagnosis and Testing (Oil Pressure Diagnosis and Testing).
* If a crankshaft or camshaft position sensor DTC is set, the Camshaft Position Actuator output control will not function.
1. Ignition ON, observe the scan tool DTC information. Verify that none of the following DTCs are set. DTC P0335, P0336, P0340, P0341, P1516, P2101, P2119, or P2176.
• If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code (DTC) List - Vehicle) for further diagnosis.
2. Command the camshaft position actuator solenoid to 20° with a scan tool. The Desired CMP parameter should match the CMP Angle parameter.
3. 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 Fame/Failure Records Data List.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the Camshaft Position Actuator Magnet.
2. Ignition OFF for 1 minute, test for less than 5 ohm between the low reference circuit terminal 2 and ground.
• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
Note: A test lamp must be used for this test. The control circuit is pulled-up to a low current voltage. A voltage on the control circuit is normal.
3. Ignition ON, engine OFF, verify that a test lamp does not illuminate between the control circuit terminal 1 and ground.
• If the test lamp illuminates, test the control circuit for short to voltage. If the circuit tests normal, replace the ECM.
4. Connect the DMM black lead to the control circuit terminal 1. Connect the DMM red lead to B+. Set the DMM on the diode setting. Command the CMP actuator solenoid ON and OFF with a scan tool. The DMM should transition from OL when commanded OFF to less than 1 V when commanded ON.
• If the circuit voltage does not correspond to the specified values, test the control circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the ECM.
5. Remove the Camshaft Position Actuator Magnet. Verify that none of the the following conditions exist:
* A damaged electrical connector
* An accumulation of dirt or debris in the area around the pintle
* A build-up of burnt engine oil on the shaft of the pintle which may cause the pintle to stick and not move freely within the proper range of travel
* For oil seepage at the solenoid connector
• If a condition is found, replace the Camshaft Position Actuator Magnet.
Note:
* The Camshaft Position Actuator Magnet pintle should be facing downward for this test.
* Do not allow electrical current to flow through the Camshaft Position Actuator Magnet for more than 1-2 s.
6. Install a 20 A fused jumper wire between the control circuit terminal 1 of the Camshaft Position Actuator Magnet and 12 V. Momentarily install a jumper wire between the low reference terminal 2 of the Camshaft Position Actuator Magnet and ground. The pintle should extend.
• If the function does not perform as specified, replace the Camshaft Position Actuator Magnet.
7. Inspect the engine timing components and camshaft position actuator filter for being restricted or plugged. A condition should not exist. Refer to Camshaft Timing Chain and Sprocket Replacement (Service and Repair).
• If a condition is found, repair as necessary.
8. If all circuits and components test normal, replace the mechanical Camshaft Position Actuator.
Component Testing
Static Test
1. Ignition OFF, remove the Camshaft Position Actuator Magnet.
Note: Ensure that the component is tested at 20°C (68°F).
2. Test for 4.6-5.2 ohm between the solenoid control terminal 1 and the low reference terminal 2 at the Camshaft Position Actuator Magnet.
• If not within the specified range, replace the Camshaft Position Actuator Magnet.
3. Test for infinite resistance between each terminal of the magnet and the magnet housing.
• If not the specified value, replace the Camshaft Position Actuator Magnet.
Dynamic Test
1. Ignition OFF, remove the Camshaft Position Actuator Magnet.
Note:
* The Camshaft Position Actuator Magnet pintle should be facing downward for this test.
* Do not allow electrical current to flow through the Camshaft Position Actuator Magnet for greater than 1-2 s.
2. Install a 20 A fused jumper wire between the control circuit terminal 1 and B+. Momentarily install a jumper wire between the low reference terminal 2 and ground. The pintle should extend.
• If the function does not perform as specified, replace the Camshaft Position Actuator Magnet.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Camshaft Position Actuator Magnet Cleaning and Inspection (49. Camshaft Position Actuator Magnet Cleaning and Inspection)
* Camshaft Position Actuator Cleaning and Inspection (50. Camshaft Position Actuator Cleaning and Inspection)
* Camshaft Position Actuator Magnet Replacement (Camshaft Position Actuator Magnet Replacement)
* Camshaft Timing Chain and Sprocket Replacement (Service and Repair) for timing chain, sprockets, CMP actuator filter screen, and CMP actuator replacement
* Control Module References (Programming and Relearning) for ECM replacement, setup, and programming