Circuit/System Testing
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connectors at the Q83A and Q83B Valve Lifter Oil Solenoid Valve.
- Disconnect the X3 harness connector at the K20 Engine Control Module.
- Test each cylinder deactivation solenoid valve control circuit for less than 5 Ω end to end.
- If 5 Ω or greater
Repair the open/high resistance in the circuit.
- If less than 5 Ω
Refer to Cylinder Deactivation (Active Fuel Management) System Diagnosis (LGX) for further diagnosis.
- If 5 Ω or greater
NOTE:
Cylinder Deactivation System command control function will not operate if any DTCs are set.