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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 P0030-P0032, P0036-P0038, P0053, P0054, P0135, or P0141 (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 at the appropriate B52 Heated Oxygen Sensor.
  2. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.
  3. Observe the scan tool HO2S 1 or 2 Heater Control Circuit Open Test Status parameter. The parameter should display Malfunction.
    • If not the specified value, test the heater control circuit terminal 2 for a short to ground, or a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.
  4. Connect a 3 A fused jumper wire between the heater control circuit terminal 2 and ground. Observe the scan tool HO2S 1 or 2 Heater Control Circuit Low Voltage Test Status parameter. The parameter should change from OK to Malfunction.
    • If not the specified value, test the heater control circuit terminal 2 for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  5. Ignition OFF, connect a 10 A fused jumper wire between the heater control circuit terminal 2 and ignition voltage circuit terminal 1.
  6. Engine running, observe the HO2S 1 or 2 Heater Control Circuit High Voltage Test Status parameter. The parameter should transition from Not Run to Malfunction.
    • If not the specified value, test the control circuit and the ignition voltage circuit for high resistance. If the circuits test normal, replace the K20 Engine Control Module.
  7. If all circuits test normal, test or replace the B52 Heated Oxygen Sensor.
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