2010 Cadillac CTS Sedan AWD V6-3.0L Page 1738

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1738

瀚慖f there is an abnormal engine noise, or a DTC set, replace the appropriate CMP actuator.

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 you observed from the Freeze Frame/Failure Records data.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Camshaft Position Actuator Replacement - Bank 1 (Right Side) Intake (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and

Push Rods/Camshaft/Service and Repair/Camshaft Position Actuator Replacement - Bank 1 (Right Side) Intake)

* Camshaft Position Actuator Replacement - Bank 1 (Right Side) Exhaust (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and

Push Rods/Camshaft/Service and Repair/Camshaft Position Actuator Replacement - Bank 1 (Right Side) Exhaust)

* Camshaft Position Actuator Replacement - Bank 2 (Left Side) Intake (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push

Rods/Camshaft/Service and Repair/Camshaft Position Actuator Replacement - Bank 2 (Left Side) Intake)

* Camshaft Position Actuator Replacement - Bank 2 (Left Side) Exhaust (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and

Push Rods/Camshaft/Service and Repair/Camshaft Position Actuator Replacement - Bank 2 (Left Side) Exhaust)

P1012

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