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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 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 between 11-18V.
* The CMP actuator is enabled.
* The power take off (PTO) is not active.
* The rate of change in the camshaft position is less than 7.5 degrees for 3.35 seconds.

Conditions for Setting the DTC

The ECM detects the difference between the desired camshaft position angle and the actual camshaft position angle is greater than 8 degrees for 20 s.

Action Taken When the DTC Sets

* DTC P0011 is a Type B DTC.
* The CMP actuator is commanded to the Park position.
* The Auto Stop and Auto Start function of the hybrid system is disabled.

Conditions for Clearing the 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 (LZ1) [1][2]Electrical Diagrams
Connector End View Reference

Component Connector End Views Connector Views
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

1. Ignition OFF, open the hood to disable the Auto-Stop function. Refer to Hybrid Modes of Operation Description Hybrid Modes of Operation Description.
2. Ignition ON, verify the scan tool hood position parameter displays Open.

• If the hood position does not display Open, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle for DTC P254F.

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.

3. 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.

4. Command the camshaft position actuator solenoid to 20° with a scan tool. The Desired CMP parameter should match the CMP Angle parameter.
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 Camshaft Position Sensor and Actuator Magnet jumper harness connector. Refer to Inline Harness Connector End Views X101 for connector identification.

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

2. Ignition OFF for 2 minutes and scan tool powered OFF, test for less than 5 ohm 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 greater than 2 V 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 ohm 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 Camshaft Position 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 Camshaft Position Actuator Magnet.

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

• If the inspection fails, replace the Camshaft Position Actuator Magnet.

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

• If the inspection fails, replace the Camshaft Position Actuator Solenoid Valve.

9. If all circuits and components test normal, test or replace the mechanical Camshaft Position Actuator.

Component Testing

Static Test
1. Ignition OFF, remove the Camshaft Position Actuator Magnet.
2. Test for 5.0-9.0 ohm between the solenoid control terminal 2 and the low reference terminal 1 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. 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 more 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 Camshaft Position Actuator Magnet.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Camshaft Position Actuator Cleaning and Inspection
* Camshaft Position Actuator Magnet Replacement Camshaft Position Actuator Magnet Replacement
* Camshaft Position Actuator Solenoid Valve Replacement Camshaft Position Actuator Solenoid Valve Replacement
* Timing Chain, Crankshaft Sprocket, Camshaft Position Actuator, and Solenoid Valve Replacement Service and Repair
* Control Module References Control Module References for ECM replacement, setup, and programming

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