Circuit/System Verification
WARNING: This page is about a different car, the 2017 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- The engine oil level and the oil pressure are critical to the correct operation of the system.Verify the engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.
- The engine oil condition has a major impact on the camshaft actuator system. Debris in the oil can interfere with the camshaft position actuator solenoid valve and the mechanical camshaft actuator operation. Inspect for dirty or degraded engine oil.
- If a crankshaft or camshaft position sensor DTC is set, the scan tool camshaft position actuator output control will be disabled.
- Ignition - On / Vehicle - In Service Mode
- Verify DTC P0335, P0336, P0340, P0341 is not set.
- If any of the DTCs are set
- If none of the DTCs are set
- Verify the following conditions do not exist:
- Engine Oil - Contaminated/Dirty/Fill Level=Low
- Engine Oil Pressure - Low - Refer to:Oil Pressure Diagnosis and Testing
- If a condition exists
Repair as necessary
- If no condition exists
- Engine - Idling
- Perform the scan tool control function:Camshaft Position Actuator - From 0 to 20 ° and back to 0°.Verify the scan tool parameter:
- Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status=OKorNot Run
- Camshaft Position Actuator Solenoid Valve Control Circuit Open Test Status=OKorNot Run
- Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Test Status =OKorNot Run
- If not the specified state
Refer to: Circuit/System Testing
- If the specified state
- Perform the scan tool control function:Camshaft Position Actuator - From 0 to 20 ° and back to 0°.
Verify the scan tool parameter: Camshaft Position Variance=Less than 2 ° - During each of the commanded states
- If 2° or greater
Refer to: Circuit/System Testing
- If less than 2°
- If 2° or greater
- Verify the scan tool parameter:Camshaft Position Variance=Less than 2°
- Perform the action while monitoring the parameter:
- Wiggle the harness and connector:Q6 Camshaft Position Actuator Solenoid Valve
- Wiggle the harness and connector:K20 Engine Control Module
- If 2° or greater
Repair as necessary - Wiring / Terminal(s) / Electrical Connector(s)
- If less than 2°
- 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.
Verify the DTC does not set.
- If the DTC sets
Refer to: Circuit/System Testing
- If the DTC is not set
- If the DTC sets
- All OK.