LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Controls And Fuel - 2.4L - DTC P0114 To DTC P0604) >> Diagnostic Information and Procedures >> DTC P0351-P0354, P2300, P2301, P2303, P2304, P2306, P2307, P2309, or P2310: Ignition Coil 1, 2, 3, 4 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the harness connector at the appropriate T8 Ignition Coil.
  2. Engine Running.
  3. Verify the appropriate scan tool Ignition Coil Control Circuit Low Voltage Test Status does not display Malfunction.
    • If Malfunction is displayed 
    1. Ignition OFF, disconnect the X3 harness connector at the K20 engine Control Module.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the control circuit.
      • If infinite resistance, replace the K20 engine Control Module.
    • If Malfunction is not displayed 
  4. Verify the appropriate scan tool Ignition Coil Control Circuit High Voltage Test Status does not display Malfunction.
    • If Malfunction is displayed 
    1. Ignition OFF, disconnect the X3 harness connector at the K20 engine Control Module.
    2. Test for less than 1V between the control circuit and ground.
      • If 1V or greater, repair the short to voltage in the circuit.
      • If less than 1V, replace the K20 engine Control Module.
    • If Malfunction is not displayed 
  5. Ignition OFF, install a 3A fused jumper wire between the control circuit terminal C and ground, engine Running.
  6. Verify the appropriate scan tool Ignition Coil Control Circuit Low Voltage Test Status displays Malfunction.
    • If Malfunction is not displayed 
    1. Ignition OFF, remove the fused jumper, and disconnect the X3 harness connector at the K20 engine Control Module.
    2. Test for less than 2Ω in the control circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, replace the K20 engine Control Module.
    • If Malfunction is displayed 
  7. Test or replace the T8 Ignition Coil.
scientia non olet · About LEMON Manuals