LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2015 >> Camaro LS, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Controls And Fuel - 6.2L (L99 LS3 LSA) Or 7.0L (LS7) - DTC P0335 To DTC P3449 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Malfunction Indicator Lamp (MIL) Diagnosis >> 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 appropriate control circuit terminal listed below and ground:
      • L99, LS3, or LS7: terminal X1 68
      • LSA: terminal X1 12
      • 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 appropriate control circuit terminal listed below and ground:
    • L99, LS3, or LS7: terminal X1 68
    • LSA: terminal X1 12
  5. Verify the malfunction indicator lamp illuminates.
    • If the malfunction indicator lamp illuminates 

      Replace the K20 Engine Control Module.

    • If the malfunction indicator lamp does not illuminate 
    1. Test for less than 1 V between the appropriate control circuit terminal listed below and ground:
      • L99, LS3, or LS7: terminal X1 68
      • LSA: terminal X1 12
      • If 1 V or greater, repair the short to voltage in the circuit.
      • If less than 1 V
    2. Ignition OFF.
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω.
  6. Ignition OFF, disconnect the harness connector at the instrument cluster.
  7. Ignition ON, verify a test lamp illuminates between the ignition voltage circuit terminal 19 and ground.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF.
    2. Test for infinite resistance between the ignition voltage circuit and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ignition voltage circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
    • If the test lamp illuminates 
  8. Replace the P16 Instrument Cluster.
scientia non olet · About LEMON Manuals