Circuit/System Verification
WARNING: This page is about a different car, the 2018 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.
- Engine oil condition has a major impact on the camshaft actuator system.
- 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
- Go to next step: 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
- Go to next step: 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 = OK or Not Run
- Camshaft Position Actuator Solenoid Valve Control Circuit Open Test Status = OK or Not Run
- Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Test Status = OK or Not Run
- If not the specified state
Refer to Circuit/System Testing below
- Go to next step: 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 below
- Go to next step: 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)
- Go to next step: 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 below
- Go to next step: If the DTC is not set
- If the DTC sets
- All OK.