2010 Cadillac CTS Sedan AWD V6-3.0L Page 1742
DTC P1011-P1014
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P1011
- Intake Camshaft Position (CMP) Actuator Park Position Bank 1
DTC 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
* DTC P0010, P0013, P0020, P0023, P2088, P2089, P2090, P2091, P2092, P2093, P2094, or P2095 is 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 run once at engine start-up, in approximately 10 seconds.
Conditions for Setting the DTC
The ECM detects that the average of the actual camshaft angle measurements is greater than 10 degrees of the parked position angle on an engine
start-up.
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.
Diagnostic Aids
* Inform the customer that the following actions may cause DTCs P1011, P1012, P1013, or P1014 to set:
- Turning the engine OFF while the accelerator pedal is pressed
- Turning the engine OFF while driving
- Pressing the accelerator pedal to start the engine
* If the customers concern is that the engine is stalling, refer to Symptoms - Engine Controls (See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Controls) for further diagnosis.
