Diagnostic Instructions

DTC Descriptors

DTC P0010: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit Bank  1

DTC 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, P0011	P0010	P0010	P0010, P0011	--
Exhaust CMP Actuator Solenoid Control Circuit Bank 1	P0013, P0014	P0013, P0014	P0013	P0013, P0014	--
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

Conditions for Setting the DTC

Action Taken When the DTC Sets

DTC P0010, P0013, P0020, and P0023 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTC P0010, P0013, P0020, and P0023 are Type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

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

1. Observe the engine oil level. The engine oil level should be within the operating range on the oil indicator stick.
2. Start the engine. Allow the engine to reach normal operating temperature.
3. 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 .
4. Using the output control function of the scan tool, command the CMP actuator solenoid to 20 degrees. The CMP Desired parameter value should match the CMP Angle parameter value.
5. Observe the CMP Variance value, on the scan tool. The CMP Variance value will increment for several seconds, until the CMP Angle value matches the Desired CMP value. The CMP Variance value should then return to zero degrees.
6. Engine running, observe the DTC information with a scan tool. DTCs P0010, P0013, P0020, or P0023 should not set.
7. 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.

Circuit/System Testing

Important: You must complete the Circuit/System Verification before proceeding with Circuit/System Testing.

1. Ignition OFF, disconnect the appropriate CMP actuator solenoid harness connector at the appropriate CMP actuator solenoid.
2. Test for less than 1 ohm between the low reference circuit terminal A and ground.

⇒	If greater than 1 ohm, test the low reference for an open/high resistance. If the circuit tests normal replace the ECM.

3. Connect a test lamp between the control circuit terminal B and the low reference circuit terminal A.
4. Command the CMP actuator solenoid from 0-20 degrees. The test lamp should turn ON and OFF when changing between commanded states.

⇒	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.

5. If all circuits test normal, test or replace the CMP Actuator solenoid.

Component Testing

Static Test

1. Ignition OFF, disconnect the appropriate CMP actuator solenoid harness connector at the CMP actuator solenoid.
2. Test for 8-12 ohms 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

Important: Do not allow the solenoid to be energized for more than 2 seconds.

1. 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.
2. Listen for the solenoid to click.

⇒	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.