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Home >> Chevrolet >> 2011 >> Volt >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.4L (LUU) - DTC P0335 Through DTC P1255/P064A >> DTC P0650 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition ON, verify that the P16 Instrument Cluster warning indicators are illuminated.
    • If the P16 Instrument Cluster indicators are not illuminated, test the ignition circuit terminal 31 for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, replace the P16 Instrument Cluster.
  2. Ignition OFF, disconnect connector X1 at the K20 Engine Control Module.
  3. Ignition ON, verify that the MIL is not illuminated.
    • If the MIL is illuminated, inspect the MIL control circuit terminal 52 X1 for a short to ground. If the circuit tests normal, replace the P16 Instrument Cluster.
  4. Ignition ON, verify that the MIL illuminates with a 3 A fused jumper between the K20 Engine Control Module MIL control circuit terminal 52 X1 and ground
    • If the MIL does not illuminate, test the MIL control circuit terminal 52 X1 for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
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