Circuit/System Verification
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. 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
- 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
- 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
- Go to next step: If the DTC is not set
- If the DTC sets
- All OK.