• | 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 | High Resistance | Open | Short to Voltage | Signal Performance |
---|---|---|---|---|---|
CMP Actuator Solenoid High Control | P0010, P0013, P0020, P0023 | P0010, P0013, P0020, P0023 | P0010, P0013, P0020, P0023 | P0010, P0013, P0020, P0023 | P0011, P0014, P0021, P0024 |
CMP Actuator Solenoid Low Reference | -- | P0010, P0013, P0020, P0023 | P0010, P0013, P0020, P0023 | -- | -- |
The camshaft position (CMP) actuator is attached to each camshaft and is hydraulically operated in order to change the angle of the camshaft relative to crankshaft position (CKP) . The CMP actuator solenoid is controlled by the engine control module (ECM) . The ECM sends a pulse width modulated 12-volt signal to each CMP actuator solenoid. The solenoid controls the amount of engine oil flow to the CMP actuator by extending a pintle within the solenoid. The pintle acts against a spool valve in the CMP actuator mechanism which is attached to the front of each camshaft. As the spool valve is moved, oil is directed to the CMP actuator, which rotates the camshaft. The CMP actuator can change the cam angle a maximum of 27 degrees.
• | The ignition is in Crank or Run. |
• | The system voltage is between 11-18 volts. |
• | DTCs P0010, P0013, P0020, and P0023 run continuously when the above conditions are met. |
• | DTCs P0010, P0016, P0017, P0018, P0019, P0335, P0336, P0340, P0341, P0345, P0346, P0365, P0366, P0390, or P0391 are not set. |
• | The system voltage is between 11-18 volts. |
• | The engine is running. |
• | The ECM has enabled the CMP actuator and commanded greater than 0 degrees. |
• | DTC P0011, P0014, P0021, P0024 runs continuously when the above conditions are met. |
The ECM detects that the state of the driver and the state of the circuit do not match. The ECM will detect an open, short to ground, or a short to voltage on the high control circuit or an open on the low reference circuit for more than 3.0 seconds.
• | DTCs P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024 are Type B DTCs. |
• | The CMP actuators are commanded to the home or parked position. |
DTCs P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024 are Type B DTCs.
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Important: The supply of clean pressurized engine oil to the CMP actuator is essential to CMP actuator performance.
⇒ | If the vehicle has the incorrect engine oil, is old, burnt, or contains additives then change the oil and filter. |
Important: The engine will run rough and may require throttle input to keep running.
Important: You must complete the Circuit/System Verification before proceeding with Circuit/System Testing.
⇒ | If greater than 1 ohm, test the low reference for an open/high resistance. If the circuit tests normal replace the ECM. |
⇒ | If the test lamp is always ON, test the high 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. |
• | Test for less than 1 ohm of resistance between the applicable CMP actuator solenoid low reference circuit and ground. |
⇒ | If greater than 1 ohm, test the low reference for an open/high resistance. If the circuit tests normal, replace the applicable CMP actuator solenoid. |
• | Test for less than 1 ohm of resistance on the applicable CMP actuator solenoid high control circuit. |
⇒ | If greater than 1 ohm, test the high control circuit for an open/high resistance. If the circuit tests normal, replace the applicable CMP actuator solenoid. |
• | Inspect the affected CMP actuator. Refer to the camshaft position actuators in Camshaft Timing Drive Components Cleaning and Inspection and Engine Front Cover Cleaning and Inspection . |
• | Inspect the engine timing components. Refer to Camshaft Timing Drive Components Cleaning and Inspection . |
Important: Ensure component is tested at 20°C (68°F).
⇒ | If the resistance is not within the specified range, replace the CMP actuator solenoid. |
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. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, setup, and programming |
• | Camshaft Timing Drive Components Cleaning and Inspection for timing chain, sprockets, CMP actuator filter screen, and CMP actuator replacement |