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Home >> Chevrolet >> 2013 >> Sonic RS, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls/Fuel - 1.8L (LUW, LWE) - DTC P0443 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0650, P263A, or P263B >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF.
  2. Disconnect the X1 harness connector at the K20 Engine Control Module.
  3. Ignition ON, verify the malfunction indicator lamp does not illuminate.
    • If the malfunction indicator lamp illuminates 
    1. Test for infinite resistance between the malfunction indicator lamp control circuit terminal X1 52 and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • If infinite resistance, replace the P16 instrument cluster.
    • If the malfunction indicator lamp does not illuminate 
  4. Connect a 3 A fused jumper wire between the malfunction indicator lamp control circuit terminal X1 52 and ground.
  5. Verify the malfunction indicator lamp illuminates.
    • If the malfunction indicator lamp does not illuminate 
    1. Test the malfunction indicator lamp control circuit terminal X1 52 for a short to voltage or an open/high resistance.
      • If the malfunction indicator lamp control circuit terminal X1 52 is shorted to voltage or has an open/high resistance, repair as necessary.
      • If the malfunction indicator lamp control circuit terminal X1 52 tests normal
    2. Test the instrument cluster ignition voltage circuit for a short to ground or open/high resistance.
      • If the instrument cluster ignition voltage circuit is shorted to ground or has an open/high resistance, repair as necessary.
      • If the instrument cluster ignition voltage circuit tests normal, replace the P16 instrument panel cluster/bulb.
    • If the malfunction indicator lamp illuminates 
  6. Replace the K20 Engine Control Module.
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