Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC P0010: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit Bank 1DTC P0013: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit Bank 1
DTC P0020: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit Bank 2
DTC P0023: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit Bank 2
Diagnostic Fault Information
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
Intake CMP Actuator Solenoid Control Circuit Bank 1 | P0010 | P0010 | P0010 | P0010, P0690 | -- |
Exhaust CMP Actuator Solenoid Control Circuit Bank 1 | P0013, P0014 | P0013, P0014 | P0013 | P0013, P0151, P0690 | -- |
Intake CMP Actuator Solenoid Control Circuit Bank 2 | P0020, P0021 | P0020, P0021 | P0020 | P0020, P0021 | -- |
Exhaust CMP Actuator Solenoid Control Circuit Bank 2 | P0023, P0024 | P0023, P0024 | P0023 | P0023, P0024 | -- |
Intake CMP Actuator Solenoid Low Reference Circuit Bank 1 | -- | P0010, P0011 | P0010 | -- | -- |
Exhaust CMP Actuator Solenoid Low Reference Circuit Bank 1 | -- | P0013, P0014 | P0013 | -- | -- |
Intake CMP Actuator Solenoid Low Reference Circuit Bank 2 | -- | P0020, P0021 | P0020 | -- | -- |
Exhaust CMP Actuator Solenoid Low Reference Circuit Bank 2 | -- | P0023, P0024 | P0023 | -- | -- |
Circuit/System Description
The camshaft position (CMP) actuator system is comprised of 4 CMP actuator solenoids, 4 oil control valves, and 4 CMP actuators. The engine control module (ECM) sends an electrical signal to the CMP actuator solenoids through the control circuits when a camshaft timing change is desired. The ground circuits of the CMP actuator solenoids are used as a return. The CMP actuator solenoid uses electromagnetic force to pull on the plunger of the oil control valve. The oil control valve will port the pressurized engine oil to either the advancing or retarding chambers of the CMP actuator. The CMP actuator, in turn, changes the CMP relative to the crankshaft position (CKP). If the desired CMP does not match the actual CMP for a calibrated amount of time, DTC P0010, P0013, P0020, or P0023 will set.
Conditions for Running the DTC
| • | DTC P2088, P2089, P2090, P2091, P2092, P2093, P2094, P2095 are not set. |
| • | The engine is running. |
| • | The CMP actuator has been commanded for more than 1 second. |
| • | The ignition voltage is between 11-18 volts. |
| • | This diagnostic runs continuously. |
Conditions for Setting the DTC
| • | The ECM detects incorrect voltage on a CMP actuator solenoid control or ground circuit. |
| • | The above condition is met for more than 1.6 seconds. |
Action Taken When the DTC Sets
DTCs P0010, P0013, P0020, P0023 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0010, P0013, P0020, P0023 are Type B DTCs.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Observe the engine oil level. The engine oil level should be within the operating range on the oil indicator stick.
- Start the engine; allow the engine to reach normal operating temperature.
- Using the scan tool monitor the engine oil pressure parameter value. The engine oil pressure must be at or above the minimum hot oil pressure values. Refer to Engine Mechanical Specifications.
- Using the output control function of the scan tool, command the CMP actuator solenoid to 20 degrees. The CMP Angle parameter value should match the CMP Desired parameter value.
- Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Important: The CMP Actuator Output Control function will automatically raise the engine speed.
Circuit/System Testing
Important: You must complete the Circuit/System Verification before proceeding with Circuit/System Testing.
- Ignition OFF, disconnect the appropriate CMP actuator solenoid harness connector at the appropriate CMP actuator solenoid.
- Connect a test lamp between the control circuit terminal B and ground.
- Engine running, command the CMP actuator solenoid from 0-20 degrees. The test lamp should turn ON and OFF when changing between commanded states.
- Ignition OFF and scan tool disconnected for 90 seconds, test for less than 5 ohms between the low reference circuit terminal A and ground.
- If all circuits test normal, test or replace the CMP Actuator solenoid.
| ⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal replace the ECM. |
| ⇒ | If test lamp is always OFF, test the control circuit for a short to ground, an open/high resistance. If the circuit tests normal replace the ECM. |
| ⇒ | If greater than 5 ohms, test the low reference for an open/high resistance. If the circuit tests normal replace the ECM. |
Component Testing
Static Test
- Ignition OFF, disconnect the appropriate CMP actuator solenoid harness connector at the CMP actuator solenoid.
- Test for 2-12 ohms of resistance at 25°C (77°F) between the control terminal B and the low reference terminal A of the CMP actuator solenoid.
| ⇒ | If the resistance is not within the specified range, replace the CMP actuator solenoid. |
Dynamic Test
- Install fused jumper wire between the control terminal B and 12 volts. Install a jumper wire between the low reference terminal A and momentarily connect to ground.
- Listen for the solenoid to click.
Important: Do not allow the solenoid to be energized for more than 2 seconds.
| ⇒ | If the function does not perform as specified, replace the CMP actuator solenoid. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for ECM replacement, setup, and programming |
