The camshaft position (CMP) actuator solenoid is controlled by the engine control module (ECM). The ECM sends a 12 volt, pulse width modulated (PWM) signal to the CMP actuator solenoid. The CMP actuator solenoid positions the CMP actuator spool valve to control the amount of pressurized engine oil, which enters into the CMP actuator assembly. A low reference wire circuit between the CMP actuator solenoid and the ECM completes the electrical circuit. The frequency of the pulse width modulated signal is fixed at 150 Hz. The ECM can only command the CMP actuator to retard the valve timing from the camshaft park position, or advance the valve timing back to the park position. The total range of valve timing command is 31 degrees as measured at the camshaft, or 62 degrees as measured at the crankshaft.

The ECM detects that the state of the high side driver and the state of the CMP solenoid control circuit does not match. The ECM will detect an open, high resistance, short to ground, or a short to voltage on the CMP solenoid control circuit, or an open on the low reference circuit, if the condition is present for more than 6.25 seconds.

DTC P0010 is a Type B DTC.

This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test.

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

1. Ignition ON, engine running, increase engine speed to between 1,200-1,500 RPMs. Monitor the camshaft actuator solenoid with a scan tool, while observing the following control circuit status parameters:

•	The CMP actuator solenoid ckt short to gnd test status

•	The CMP acutator solenoid ckt open test status

•	The CMP actuator solenoid ckt short to volts test status

⇒	Each parameter should display OK.

2. 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.

Important: You must perform the Circuit/System Verification first.

1. Ignition OFF, disconnect the CMP actuator solenoid harness connector, C112.
2. Test for less than 1 ohm between the low reference circuit terminal E and ground on the ECM side of harness.

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

3. Verify the test lamp does not illuminate between the ground circuit terminal E and the control circuit D on the ECM side of harness.

⇒	If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM.

4. Remove the test lamp.
5. Command the CMP actuator from zero to 25 degrees. Verify the scan tool CMP actuator ckt short to volts test status parameter is OK.

⇒	If not the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the ECM.

6. Install a 3A fused jumper wire between the control circuit terminal D and the low reference circuit terminal E on the ECM side of harness. Command the CMP actuator to 25 degrees with a scan tool. Verify the scan tool CMP actuator ckt short to volts test status parameter is displaying Fault.

⇒	If not the specified value, test the control circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

7. Remove the water pump from the engine. Refer to Water Pump Removal.
8. Inspect and test the remaining CMP solenoid wire harness from C112 to the CMP solenoid for a short to ground or an open/high resistance.

⇒	If all circuits test normal, replace the CMP actuator solenoid.

Important: You must perform the Circuit/System Testing before proceeding with Component Testing.

Static Test

Test for 5.9 and 6.9 ohms at 20°C (68°F) between the solenoid control terminal 2 and the low reference terminal 1 at the CMP actuator solenoid.

Dynamic Test

Important: Do not allow electrical current to flow through the CMP actuator solenoid for more than 1-2 seconds, or damage to the solenoid may occur.

Point the CMP actuator solenoid vertically, towards a shop towel. Connect one end of a fused jumper wire to the CMP actuator solenoid control circuit terminal 2 and 12 volts. Connect a second jumper wire to the low reference circuit terminal 1 and momentarily connect to ground. The CMP actuator solenoid should immediately extend.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.