2010 Cadillac Truck SRX FWD V6-3.0L Page 1005

2010 Cadillac Truck SRX FWD V6-3.0L Page 1005

DTC P0016, P0017, P0018, or P0019

The ECM detects that one camshaft is mis-aligned with the crankshaft. The ECM detects one of the following conditions:

* Bank 1 intake camshaft is greater than 9 degrees retarded or 12 degrees advanced in relationship to the crankshaft.

* Bank 1 exhaust camshaft is greater than 10 degrees retarded or 13 degrees advanced in relationship to the crankshaft.

* Bank 2 intake camshaft is greater than 11 degrees retarded or 13 degrees advanced in relationship to the crankshaft.

* Bank 2 exhaust camshaft is greater than 9 degrees retarded or 13 degrees advanced in relationship to the crankshaft.

DTC P0016 and P0017

The ECM detects that both camshafts on bank 1 are mis-aligned with the crankshaft. The ECM detects the following conditions:

* Bank 1 intake camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

* Bank 1 exhaust camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

DTC P0018 and P0019

The ECM detects that both camshafts on bank 2 are mis-aligned with the crankshaft. The ECM detects the following conditions:

* Bank 2 intake camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

* Bank 2 exhaust camshaft is greater than 7 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

DTC P0016, P0017, P0018, and P0019

The ECM detects that all 4 camshafts are mis-aligned with the crankshaft. The ECM detects the following conditions:

* Bank 1 intake camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

* Bank 1 exhaust camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

* Bank 2 intake camshaft is greater than 6 degrees retarded or 8 degrees advanced in relationship to the crankshaft.

* Bank 2 exhaust camshaft is greater than 7 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

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 secondary timing chain can cause this DTC to set.

* This diagnostic algorithm is designed to detect an alignment condition between a primary intermediate sprocket and the secondary timing

chain, or the alignment between a primary intermediate sprocket and the crankshaft. Either condition would cause the camshaft timing for

both cams on one bank to be off an equal number of degrees.

* DTCs P0016, P0017, P0018, and P0019 set at the same time 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

2010 Cadillac CTS Sedan AWD V6-3.6L Page 883

2010 Cadillac CTS Sedan AWD V6-3.6L Page 883

P0017

DTC P0016, P0017, P0018, or P0019 (Without LF1)

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 P0016

- Crankshaft Position (CKP) - Intake Camshaft Position (CMP) Correlation Bank 1

DTC P0017

- Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation Bank 1

DTC P0018

- Crankshaft Position (CKP) - Intake Camshaft Position (CMP) Correlation Bank 2

DTC P0019

- Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation Bank 2

Circuit/System Description

The engine control module (ECM) uses the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor pulses to monitor the

correlation between the crankshaft and the camshaft position. An improper relative position can be caused by either engine timing or improper

indexing of the camshaft drive chain.

Conditions for Running the DTC

* Before the ECM can report DTC P0016, P0017, P0018, or P0019 failed, DTCs P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024,

P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P2088, P2089, P2090,

P2091, P2092, P2093, P2094, and P2095 must run and pass.

* The engine is operating for greater than 50 seconds.

* The engine coolant temperature is between 0-95掳C (32-203掳F).

* The calculated engine oil temperature is less than 120掳C (248掳F).

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

Conditions for Setting the DTC

The ECM detects a deviation in the relationship between a camshaft and the crankshaft. The ECM detects the learned camshaft 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.

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.

* 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).

* Observe the Desired Intake Camshaft Position and the Camshaft Position parameters with a scan tool before a DTC sets. This may help to

2010 Cadillac CTS Sedan AWD V6-3.6L Page 899

2010 Cadillac CTS Sedan AWD V6-3.6L Page 899

1. Ignition ON, observe the scan tool DTC information. Verify that DTC P0016, P0017, P0018, P0019, P0335, P0336, P0338, P0341, P0342,

P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P0521, P0522, P0523, P0638, P2100, P2101, or P2119 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. Engine idling, command the appropriate Camshaft Position Actuator from 0 degrees to 40 degrees and back to zero while observing the

appropriate scan tool Camshaft Position Variance parameters. The Camshaft Position Variance should be less than 2 degrees in each of the

commanded states.

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.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate Camshaft Position Actuator Solenoid Valve.

2. Ignition ON, load test for B+ between the ignition circuit terminal 1 and ground.

瀚慖f less than the specified range, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal

and the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.

Note: Use the J 35616-200 - Test Lamp for this test. If the J 35616-200 - Test Lamp is not available, use a test lamp that measures greater

than 20 ohm.

3. Connect a test lamp between the control circuit terminal 2 and B+.

4. Command the appropriate Camshaft Position Actuator Solenoid Valve ON with a scan tool.

Note: The voltage must be measured at the control side of the circuit.

5. Load test for less than 1 V between the control circuit terminal 2 and ground.

瀚慖f greater than the specified range, test the control circuit for an open/high resistance. If the circuit/connections test normal, replace the

ECM.

6. Remove the Camshaft Position Actuator Solenoid Valve. Verify the following conditions do not exist with the Camshaft Position Actuator

Solenoid Valve:

* Torn, restricted, mis-positioned, or missing screens at the CMP actuator solenoid

* Engine oil leak between the oil sealing lands of the CMP actuator solenoid. Inspect the lands of the CMP actuator solenoid for nicks.

* Oil seepage at the CMP actuator solenoid connector

瀚慖f a condition is found, replace Camshaft Position Actuator Solenoid Valve.

7. Ignition OFF, swap the Camshaft Position Actuator Solenoid Valve with a Camshaft Position Actuator Solenoid Valve that is operating

correctly.

Note: This step is testing the mechanical CMP actuator for the camshaft that set the DTC.

8. Engine idling. Command the appropriate Camshaft Position Actuator from 0 degrees to 40 degrees and back to zero while observing the

appropriate scan tool Camshaft Position Variance parameters. The Camshaft Position Variance should be less than 2 degrees in each of the

commanded states.

瀚慖f greater than the specified value, replace the mechanical camshaft position actuator.

9. If all circuits/connections test normal, test or replace the Camshaft Position Actuator Solenoid Valve.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate Camshaft Position Actuator Solenoid Valve.

2. Test for 7-12 ohm between the control terminal 2 and the ignition terminal 1 of the solenoid.

瀚慖f not within the specified range, replace the Camshaft Position Actuator Solenoid Valve.

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

瀚慖f not the specified value, replace the Camshaft Position Actuator Solenoid Valve.

Repair Instructions

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

2010 Cadillac Truck SRX AWD V6-3.0L Page 1005

2010 Cadillac Truck SRX AWD V6-3.0L Page 1005

DTC P0016, P0017, P0018, or P0019

The ECM detects that one camshaft is mis-aligned with the crankshaft. The ECM detects one of the following conditions:

* Bank 1 intake camshaft is greater than 9 degrees retarded or 12 degrees advanced in relationship to the crankshaft.

* Bank 1 exhaust camshaft is greater than 10 degrees retarded or 13 degrees advanced in relationship to the crankshaft.

* Bank 2 intake camshaft is greater than 11 degrees retarded or 13 degrees advanced in relationship to the crankshaft.

* Bank 2 exhaust camshaft is greater than 9 degrees retarded or 13 degrees advanced in relationship to the crankshaft.

DTC P0016 and P0017

The ECM detects that both camshafts on bank 1 are mis-aligned with the crankshaft. The ECM detects the following conditions:

* Bank 1 intake camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

* Bank 1 exhaust camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

DTC P0018 and P0019

The ECM detects that both camshafts on bank 2 are mis-aligned with the crankshaft. The ECM detects the following conditions:

* Bank 2 intake camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

* Bank 2 exhaust camshaft is greater than 7 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

DTC P0016, P0017, P0018, and P0019

The ECM detects that all 4 camshafts are mis-aligned with the crankshaft. The ECM detects the following conditions:

* Bank 1 intake camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

* Bank 1 exhaust camshaft is greater than 6 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

* Bank 2 intake camshaft is greater than 6 degrees retarded or 8 degrees advanced in relationship to the crankshaft.

* Bank 2 exhaust camshaft is greater than 7 degrees retarded or 9 degrees advanced in relationship to the crankshaft.

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 secondary timing chain can cause this DTC to set.

* This diagnostic algorithm is designed to detect an alignment condition between a primary intermediate sprocket and the secondary timing

chain, or the alignment between a primary intermediate sprocket and the crankshaft. Either condition would cause the camshaft timing for

both cams on one bank to be off an equal number of degrees.

* DTCs P0016, P0017, P0018, and P0019 set at the same time 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

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 919

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 919

1. Ignition ON, observe the scan tool DTC information. Verify that none of the following DTCs are set. DTC P0016, P0017, P0018, P0019,

P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P0521, P0522, P0523,

P0638, P2100, P2101, P2102, P2103, or P2119.

瀚慖f any of the DTCs 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. Engine idling, command the appropriate Camshaft Position Actuator from 0 degrees to 40 degrees and back to zero while observing the

appropriate scan tool Camshaft Position Variance parameters. The Camshaft Position Variance should be less than 2 degrees in each of the

commanded states.

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.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve.

2. Ignition ON, load test for B+ between the ignition circuit terminal 1 and ground.

瀚慖f less than the specified range, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal

and the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.

Note: Use the J 35616-200 - Test Lamp Kit for this test. If the J 35616-200 - Test Lamp Kit is not available, use a test lamp that measures

greater than 20 ohm.

3. Connect a test lamp between the control circuit terminal 2 and B+.

Note: The voltage must be measured at the control side of the circuit.

4. Command the appropriate Camshaft Position Actuator Solenoid Valve ON with a scan tool. Load test for less than 1 V between the control

circuit terminal 2 and ground.

瀚慖f greater than the specified range, test the control circuit for an open/high resistance. If the circuit/connections test normal, replace the

K20 Engine Control Module.

5. Remove the Camshaft Position Actuator Solenoid Valve. Inspect the Camshaft Position Actuator Solenoid Valve and mounting area for the

following conditions:

* For a torn, restricted, mis-positioned, or missing screens at the Camshaft Position Actuator Solenoid Valve

* For engine oil leaks between the oil sealing lands of the Camshaft Position Actuator Solenoid Valve. Inspect the lands of the Camshaft

Position Actuator Solenoid Valve for nicks

* For oil seepage at the Camshaft Position Actuator Solenoid Valve connector

瀚慖f a condition is found, replace Q6 Camshaft Position Actuator Solenoid Valve.

6. Ignition OFF, swap the appropriate Camshaft Position Actuator Solenoid Valve with a Camshaft Position Actuator Solenoid Valve that is

operating correctly.

7. Engine idling. Command the appropriate Camshaft Position Actuator from 0 degrees to 40 degrees and back to zero while observing the

appropriate scan tool Camshaft Position Variance parameters. The Camshaft Position Variance should be less than 2 degrees in each of the

commanded states.

瀚慖f greater than the specified value, replace the mechanical camshaft position actuator.

8. If all circuits/connections test normal, test or replace the Q6 Camshaft Position Actuator Solenoid Valve.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve.

2. Test for 7-12 ohm between the control terminal 2 and the ignition terminal 1 of the Q6 Camshaft Position Actuator Solenoid Valve.

瀚慖f not within the specified range, replace the Q6 Camshaft Position Actuator Solenoid Valve.

3. Test for infinite resistance between each terminal and the Q6 Camshaft Position Actuator Solenoid Valve housing.

瀚慖f not the specified value, replace the Q6 Camshaft Position Actuator Solenoid Valve.

Repair Instructions

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

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 921

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 921

* DTC P0010, P0013, P0016, P0017, P0018, P0019, P0020, P0023, P2088, P2089, P2090, P2091, P2092, P2093, P2094, and P2095 is not set.

* The engine speed is greater than 560 RPM.

* The engine is operating for greater than 1 s.

* The engine coolant temperature is between -48 to +143掳C (-54 to +289掳F).

* The engine oil temperature is less than -48掳C (-54掳F).

* 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.

* DTCs P000A, P000B, P000C, P000D, P0011, P0014, P0021, and P0024 run continuously once the above conditions are met for greater than

20 s.

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 6-11

degrees.

OR

* The ECM detects a slow response, a deviation greater than 3 degrees in time greater than 4 s, for the actual camshaft position angle to match

the desired position angle during the test.

* Either condition exists for greater than 1 s or for a cumulative time of 4 s.

Action Taken When the DTC Sets

DTCs P000A, P000B, P000C, P000D, P0011, P0014, P0021, and P0024 are type B DTCs.

Conditions for Clearing the DTC

DTCs P000A, P000B, P000C, P000D, P0011, P0014, P0021, and P0024 are type B DTCs.

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

Special Tools

J 35616-200 - Test Lamp Kit

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