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Home >> Chevrolet >> 2012 >> Cruze Eco, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 77 (Instrument Panel System Displays & Gauges) >> Diagnostic Information and Procedures >> DTC B2961 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the ignition switch.
  2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition switch fuse is open, test the signal circuit terminal 5 for a short to ground.
  3. Verify the BCM scan tool Key In Ignition Cylinder Switch parameter is No.
    • If not the specified value, test the signal circuit terminal 5 for a short to voltage. If the circuit tests normal, replace the BCM.
  4. Install a 3-amp fused jumper wire between the signal circuit terminal 5 and the B+ circuit terminal 2. Verify the BCM scan tool Key In Ignition Cylinder Switch parameter is Yes.
    • If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, test or replace the ignition switch.
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