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Home >> Chevrolet >> 2012 >> Cruze Eco, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Manual Transmission - M32) >> Diagnostic Information and Procedures >> DTC P0812 >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF, disconnect the harness connector at the B16 Backup Lamp Switch.
  2. Ignition OFF, test for less than 5 Ω between the ground circuit terminal B and ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Reverse Switch parameter is Off.
    • If not the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.
  4. Ignition ON, install a 3 A fused jumper wire between the signal circuit terminal A and ground. Verify the scan tool Reverse Switch parameter is On.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  5. If all circuits test normal, test or replace the B16 Backup Lamp Switch.
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