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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 total range of valve timing command is 26 degree as measured at the camshaft or 52 degree as measured at the crankshaft.

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 is not set.

* The engine is running.

* The system voltage is greater than 11 V.

* The CMP actuator is enabled and commanded greater than 0 degrees.

* The power take off (PTO) is not active - If equipped.

* The desired camshaft position does not vary greater than 7.5 degrees for 2 s.

* DTC P0011 runs continuously when the above conditions are met.

Conditions for Setting the DTC

The ECM detects the difference between the desired CMP angle and the actual CMP angle is greater than 8 degrees.

Action Taken When the DTC Sets

* DTC P0011 is a Type B DTC.

* The CMP actuator is commanded to the park position.

Conditions for Clearing the DTC

DTC P0011 is a Type B DTC.

Diagnostic Aids

* 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.

* Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, or timing chain can cause this DTC to set.

Reference Information

Schematic Reference

Engine Controls Schematics [1][2]Electrical Diagrams

Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)

Description and Operation

Camshaft Actuator System Description Description and Operation

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 Control Module References 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 actuator system. Verify that the engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.

* The engine oil condition has a major impact on the camshaft actuator system. Debris in the oil can interfere with the camshaft position actuator solenoid and the mechanical camshaft actuator operation. Inspect for dirty or degraded crankcase oil. 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 Remaining parameter. Advise the customer an oil change may be required.

1. Verify the engine has the correct oil pressure. Refer to Oil Pressure Diagnosis and Testing Oil Pressure Diagnosis and Testing.

2. Ignition ON, observe the scan tool DTC information. Verify that none of the following DTCs are set. DTC P0335, P0336, P0340, P0341, P0521, P0522, P0523, 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.

Note: If a crankshaft or CMP sensor DTC is set, the Camshaft Position Actuator output control will not function.

3. Engine idling, command the CMP actuator to 20° with a scan tool. The Desired CMP parameter should match the CMP Angle parameter.

4. Observe the CMP Variance parameter with a scan tool. The CMP Variance will increment for several seconds, until the CMP Angle value matches the Desired CMP value. The CMP Variance value should return to 0°.

5. 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 CMP sensor and CMP actuator magnet jumper harness connector. Refer to Inline Harness Connector End Views X100 for connector identification.

Note: Testing for steps 2-4 is performed on the ECM side of the jumper harness connector.

2. Ignition OFF for 1 minute, test for less than 5 ohms between the low reference circuit terminal E and ground.

• If greater than the specified value, 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 D and ground.

• If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM.

4. Connect the DMM black lead to the control circuit terminal D. 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.

Note: Testing for steps 5 and 6 is performed on the engine side of the jumper harness connector.

5. Ignition OFF, test for infinite resistance between the control circuit terminal D and ground.

• If not the specified value, repair the control circuit for a short to ground.

6. Test for 5.0-9.0 ohms between the control circuit terminal D and the low reference circuit terminal E.

• If less than the specified range, test for a short between the control circuit and the low reference circuit. If the circuits/connections test normal, test or replace the CMP actuator magnet.

• If greater than the specified range, test the control circuit and the low reference for an open/high resistance. If the circuits/connections test normal, test or replace the CMP actuator magnet.

7. Remove the CMP actuator magnet. Perform the Camshaft Position Actuator Magnet Cleaning and Inspection Camshaft Position Actuator Magnet Cleaning and Inspection. The CMP actuator magnet should pass the inspection.

• If the inspection fails, replace the CMP actuator magnet.

8. Perform the Camshaft Position Actuator Solenoid Valve Inspection (Off-Vehicle) Camshaft Position Actuator Solenoid Valve Inspection (Off-Vehicle)Camshaft Position Actuator Solenoid Valve Inspection (On-Vehicle) Camshaft Position Actuator Solenoid Valve Inspection (On-Vehicle). The CMP Actuator Solenoid Valve should pass the inspection.

• If the inspection fails, replace the CMP Actuator Solenoid Valve.

9. If all circuits and components test normal, replace the mechanical CMP Actuator.

Component Testing

Static Test

1. Ignition OFF, remove the CMP actuator magnet.

2. Test for 5.0-9.0 ohms between the solenoid control terminal 2 and the low reference terminal 1 at the CMP actuator magnet.

• If not within the specified range, replace the CMP actuator magnet.

3. Test for infinite resistance between each terminal of the magnet and the magnet housing.

• If not the specified value, replace the CMP actuator magnet.

Dynamic Test

1. Remove the CMP actuator magnet.

Note:

* The CMP actuator magnet pintle should be facing downward for this test.

* Do not allow electrical current to flow through the CMP actuator magnet for greater than 1-2 s.

2. Install a 20 A fused jumper wire between the control circuit terminal 2 and 12 V. Momentarily install a jumper wire between the low reference terminal 1 and ground. The pintle should extend.

• If the function does not perform as specified, replace the CMP actuator magnet.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Camshaft Position Actuator Cleaning and Inspection Camshaft Position Actuator Cleaning and Inspection

* Camshaft Position Actuator Magnet Replacement Camshaft Position Actuator Magnet Replacement

* Camshaft Position Actuator Replacement Camshaft Position Actuator Replacement

* Camshaft Position Actuator Solenoid Valve Replacement Camshaft Position Actuator Solenoid Valve Replacement

* Control Module References Control Module References for ECM replacement, programming, and setup

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