2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1020
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
this DTC to set.
Circuit/System Verification
Note: The engine oil level and the oil pressure are critical to the correct operation of the camshaft position actuator system. Verify that the
engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.
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.
