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Home >> Chevrolet >> 2012 >> Cruze Eco, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls/Fuel - 1.8L - DTC Diagnostics, Troubleshooting & Diagnosis) >> Diagnostic Information and Procedures >> DTC P2076, P2077, or P2078 (LUW) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the harness connector of the Q22 Intake Manifold Tuning Solenoid Valve.
  2. Test for less than 5 Ω between the ground circuit terminal 2 and ground.
    • If greater than the specified range, test for an open/high resistance in the ground circuit.
  3. Ignition ON, test for 4.8-5.2 V between the Q22 Intake Manifold Tuning Solenoid Valve signal circuit terminal 4 and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.
  4. If all circuits test normal, replace the Intake Manifold.
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