2010 Cadillac Truck SRX AWD V6-3.0L Page 1021

2010 Cadillac Truck SRX AWD V6-3.0L Page 1021

1. Ignition ON, observe the DTC information with a scan tool. Verify that none of the following DTCs are set. DTC P0010, P0013, P0020,

P0023, P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P2088, P2089,

P2090, P2091, P2092, P2093, P2094, or P2095.

瀚慖f any of the DTCs listed are set refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) for further diagnosis.

2. Idle the engine at normal operating temperature for 10 min. DTCs P0016, P0017, P0018, or P0019 should not set.

瀚慖f a DTC sets, inspect for the following and repair as necessary:

* The correct installation of the camshaft sensors

* The correct installation of the crankshaft sensor

* A timing chain tensioner condition

* An incorrectly installed timing chain

* Excessive play in the timing chain

* A timing chain that jumped teeth

* A crankshaft reluctor wheel that has moved in relationship to top dead center (TDC) on the crankshaft

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.

* Timing Chain Alignment Diagram (See: Engine, Cooling and Exhaust/Engine/Timing Components/Timing Component Alignment

Marks/Locations)

* Camshaft Timing Drive Components Cleaning and Inspection (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/81.

Camshaft Timing Drive Components Cleaning and Inspection)

* Crankshaft and Bearing Cleaning and Inspection (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/66. Crankshaft

and Bearing Cleaning and Inspection)

P0020

DTC P0010, P0013, P0020, or P0023 (LF1, LFW)

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 Descriptors

DTC P0010

- Intake Camshaft Position Actuator Solenoid Valve Control Circuit Bank 1

DTC P0013

- Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Bank 1

DTC P0020

- Intake Camshaft Position Actuator Solenoid Valve Control Circuit Bank 2

DTC P0023

- Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Bank 2

Circuit/System Description

The camshaft position actuator system enables the Engine Control Module (ECM) to change the timing of the camshafts while the engine is

operating. The Camshaft Position Actuator Solenoid Valve signal from the ECM is pulse width modulated (PWM). The ECM controls the

Camshaft Position Actuator Solenoid Valve duty cycle by controlling the amount of solenoid valve ON time. The Camshaft Position Actuator

Solenoid Valve controls the advance or the retard of each camshaft. The Camshaft Position Actuator Solenoid Valve controls the oil flow that

applies the pressure to advance or retard the camshafts.

The ECM controls the Camshaft Position Actuator Solenoid Valve by suppling a 12 V pulse width modulated (PWM) signal. The ECM supplies a

2010 Cadillac Truck SRX AWD V6-3.0L Page 959

2010 Cadillac Truck SRX AWD V6-3.0L Page 959

* DTCs P0010, P0013, P0020, and P0023 run continuously once the above conditions are met.

Conditions for Setting the DTC

The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 s.

Action Taken When the DTC Sets

DTCs P0010, P0013, P0020, and P0023 are type B DTCs.

Conditions for Clearing the DTC

DTCs P0010, P0013, P0020, and P0023 are type B DTCs.

Diagnostic Aids

If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool circuit status

parameters for the component. The circuit status parameters change from OK or Not Run to Malfunction if there is a condition with the circuit or a

connection.

Reference Information

Schematic Reference

Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Camshaft Actuator System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Camshaft

Actuator System)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

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

1. Ignition ON, observe the DTC information with a scan tool. Verify DTC P0335, P0336, P0340, P0341, P0345, P0346, P0365, P0366, P0390,

and P0391 is not set.

瀚慖f a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble

Code (DTC) List - Vehicle) for further diagnosis.

2. Observe the appropriate control circuit status parameters listed below with a scan tool:

* The Intake/Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status Bank 1 or 2

* The Intake/Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Open Test Status Bank 1 or 2

* The Intake/Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Test Status Bank 1 or 2

Each parameter should display OK or Not Run

3. Engine idling, command the appropriate Camshaft Position Actuator from 0 degrees to 25 degrees and back to zero while observing the

appropriate control circuit status parameters listed below with a scan tool:

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1020

* DTCs P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024, P2088, P2089, P2090, P2091, P2092, P2093, P2094, or P2095 are not

set.

* The engine is operating for greater than 2 s.

* The engine must accelerate such that the camshaft position actuator system is commanded from the park position to the phased position. This

is considered a cam control cycle. There must be a minimum of 2 cam control cycles for at least 2.5 s each in the phased position.

* DTC P0016, P0017, P0018, and P0019 run continuously when the above conditions are met for approximately 10 min.

Conditions for Setting the DTC

The ECM detects the ECM learned camshaft position angle is greater than 10 degrees advanced or 10 degrees retarded in relationship to the

crankshaft.

OR

The ECM detects the actual camshaft angle is advanced 15 degrees or retarded 21 degrees in relationship to the camshaft parked/reference position

for greater than 10 s.

Action Taken When the DTC Sets

DTCs P0016, P0017, P0018, and P0019 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0016, P0017, P0018, and P0019 are Type B DTCs.

Diagnostic Aids

* Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, camshaft sensor, crankshaft

sensor, or timing chain can cause this DTC to set.

* An actuator that is in the full advance or retard position can cause this DTC to set.

* The presence of DTCs P0008 and P0009 along with P0016, P0017, P0018, and P0019 indicates a possible condition with the primary timing

chain and the alignment between both intermediate sprockets and the crankshaft. Or, the crankshaft reluctor wheel has moved and is no

longer referenced to top dead center (TDC).

* Observing the desired and actual camshaft angle parameters, with a scan tool before a DTC sets, may help to isolate whether a condition is

specific to one camshaft, one bank, or caused by a condition with the primary crankshaft timing.

Reference Information

Schematic Reference

Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Camshaft Actuator System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Camshaft

Actuator System)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing