• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
CMP Actuator Solenoid High Control | P0010 | P0010 | -- | -- |
CMP Actuator Solenoid Low Reference | -- | P0010, P0011 | -- | -- |
Circuit | Short to Ground | Open | Short to Voltage |
---|---|---|---|
Operating Conditions: Engine running above 900 RPM in park Parameter Normal Range: Incomplete/OK | |||
CMP Solenoid | Short to GRD/Open | Short to GRD/Open | Short to B+ |
Circuit | Short to Ground | Open | Short to Voltage |
---|---|---|---|
Operating Conditions: Engine running above 900 RPM in park Parameter Normal Range: 0-100% | |||
CMP Command | 0-100% | 0-100% | 0-100% |
Circuit | Short to Ground | Open | Short to Voltage |
---|---|---|---|
Operating Conditions: Engine running above 900 RPM in park Parameter Normal Range: 0-31° | |||
Desired CMP | 0-31° | 0-31° | 0-31° |
Circuit | Short to Ground | Open | Short to Voltage |
---|---|---|---|
Operating Conditions: Engine running above 900 RPM in park Parameter Normal Range: 0-31° | |||
CMP Angle | 0-31° | 0° | 0° |
Circuit | Short to Ground | Open | Short to Voltage |
---|---|---|---|
Operating Conditions: Engine running above 900 RPM in park Parameter Normal Range: 0° | |||
CMP Variance | 0-31° | 0-31° | 0-31° |
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 ignition switch is in the Crank or Run position. |
• | The system voltage is between 9-18 volts. |
• | The CMP actuator is command ON. |
• | DTC P0010 runs continuously when the above conditions are met. |
• | DTC P0010, P0016, P0335, P0336, P0340, or P0341 is not set. |
• | The engine is running. |
• | The system voltage is between 9-18 volts. |
• | The CMP actuator is enabled. |
• | The power take off (PTO) is not active. |
• | The rate of change in the camshaft position is less than 7.5 degrees for 3.35 seconds. |
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 seconds.
• | The ECM detects resistance greater than 2 ohms on the low reference circuit. |
• | The ECM detects that the CMP Angle position is more than 8 degrees difference than the Desired CMP position. |
• | DTC P0010 and P0011 are Type B DTCs. |
• | The CMP actuator is commanded to the park position. |
DTC P0010 and P0011 are Type B DTCs.
This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test .
Camshaft Actuator System Description
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
⇒ | If the vehicle passes the Circuit/System Verification, then operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data list. |
Important: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
⇒ | If the greater than 1 ohm, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM. |
⇒ | If the test lamp is always ON, test the solenoid control circuit for a short to voltage. If the circuit tests normal, replace the ECM. |
⇒ | If the test lamp is always OFF, test the solenoid control circuit for an open/high resistance or a short to ground. If the circuit tests normal, replaced the ECM. |
⇒ | If the circuits test normal, replace the CMP actuator solenoid. |
Important: Incorrect engine oil viscosity, aftermarket engine oil additives, or engine oil that overdue for changing, can greatly affect the performance of the camshaft actuator.
⇒ | If greater than 1 ohm, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM. |
⇒ | If the circuit tests normal, perform the component testing for the CMP actuator solenoid. |
⇒ | If the CMP solenoid and the circuit test normal, then refer to Camshaft Position Actuator Magnet Cleaning and Inspection and Camshaft Position Actuator Solenoid Valve Inspection . |
Important: You must perform the Circuit/System Testing before proceeding with Component Testing.
Test for 5.9-6.9 ohms of resistance at 20°C, or 68°F between the solenoid control terminal 2 and the low reference terminal 1 at the CMP actuator solenoid.
⇒ | If the resistance is not with in the specified range, then replace the CMP actuator solenoid. Refer to Camshaft Position Actuator Magnet Replacement . |
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.
⇒ | If the CMP actuator solenoid pintle does not extend, then replace the CMP actuator solenoid. Refer to Camshaft Position Actuator Magnet Replacement . |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, setup, and programming |