Diagnostic Instructions
DTC Descriptor
DTC P0011: Intake Camshaft Position Range/Performance Bank 1
DTC P0014: Exhaust Camshaft Position Range/Performance Bank 1
DTC P0021: Intake Camshaft Position Range/Performance Bank 2
DTC P0024: Exhaust Camshaft Position Range/Performance Bank 2
Circuit/System Description
The camshaft position (CMP) actuator system enables the engine control module (ECM) to change the timing of the camshafts while the engine is operating. The CMP actuator solenoid signal from the ECM is pulse width modulated (PWM). The ECM controls the
CMP actuator solenoid duty cycle by controlling the amount of solenoid ON time. The CMP actuator solenoid controls the advance or the retard of each camshaft. The CMP actuator solenoid controls the oil flow that applies the pressure to advance or retard the
camshafts.
Conditions for Running the DTC
| • | Before the ECM can report DTC P0011, P0014, P0021, or P0024 failed DTCs P0010, P0013, P0020, P0023, 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. |
| • | DTCs P0016, P0017, P0018, P0019, P0335, P0336 and P0338 are not set. |
| • | The engine speed is greater than 500 RPM. |
| • | The engine must accelerate such that the CMP actuator system is commanded from the park position to the phased position. This is considered a cam control cycle. There must be a total of 4-10 cam control cycles for at least 2.5 seconds
each in the phased position. |
| • | The engine is operating for approximately 1.8 seconds. |
| • | DTCs P0011, P0014, P0021 and P0024 run continuously once the above conditions are met for greater than 1 second. |
Conditions for Setting the DTC
| • | The ECM detects the difference between the desired camshaft position and the actual camshaft position angle is greater than 5 degrees. |
| • | The ECM detects the difference between the actual camshaft angle and the locked position angle is greater than 1 degree. |
| • | The condition exists for greater than 4 seconds. |
Action Taken When the DTC Sets
DTCs P0011, P0014, P0021 and P0024 are type B DTCs.
Conditions for Clearing the DTC
DTCs P0011, P0014, P0021 and P0024 are type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Camshaft Actuator System Description
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References
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. You may also monitor the Engine Oil Life parameter with a scan tool. |
| • | 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 (CMP) actuator system. Verify that the engine has the correct oil level and the correct oil pressure before continuing with
this diagnostic.
- 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.
- Engine idling, command the suspected camshaft actuator from 0 degrees to 40 degrees and back to zero while observing the appropriate scan tool CMP Angle Variance parameters. The CMP Angle Variance should be less than 2 degrees
in each of the commanded states.
- 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
- Ignition OFF, disconnect the harness connector at the appropriate camshaft position (CMP) actuator solenoid.
- Ignition ON, load test for B+ between the ignition circuit terminal 1 and ground.
| ⇒ | If 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 Ω.
- 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.
- Command the appropriate CMP actuator solenoid ON with a scan tool. Load test for less than 1 V between the control circuit terminal 2 and ground.
| ⇒ | If greater than the specified range, test the control circuit for an open/high resistance. If the circuit/connections test normal, replace the ECM. |
- Remove the CMP actuator solenoid. Inspect the CMP actuator solenoid and mounting area for the following conditions:
| • | For a torn, restricted, mis-positioned, or missing screens at the CMP actuator solenoid |
| • | For engine oil leaks between the oil sealing lands of the CMP actuator solenoid--Inspect the lands of the CMP actuator solenoid for nicks. |
| • | For oil seepage at the CMP actuator solenoid connector |
| ⇒ | If a condition is found, replace CMP actuator solenoid. |
- Ignition OFF, swap the suspected CMP actuator solenoid with a CMP actuator solenoid that is operating correctly.
- Engine idling. Command the suspected camshaft actuator from 0 degrees to 40 degrees and back to zero while observing the appropriate scan tool CMP Angle Variance parameters. The CMP Angle Variance should be less than 2 degrees
in each of the commanded states.
| ⇒ | If the CMP Angle Variance is greater than 2 degrees, replace the mechanical camshaft position (CMP) actuator. |
- If all circuits/connections test normal, test or replace the CMP actuator solenoid.
Component Testing
- Ignition OFF, disconnect the harness connector at the appropriate camshaft position (CMP) actuator solenoid.
- Test for 7-12 Ω between the control terminal 2 and the ignition terminal 1 of the camshaft position (CMP) actuator solenoid.
| ⇒ | If not within the specified range, replace the CMP actuator solenoid. |
- Test for infinite resistance between each terminal and the CMP actuator solenoid housing.
| ⇒ | If not the specified value, replace the CMP actuator solenoid valve. |
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
