LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Controls And Fuel - 2.0L (LUZ) Diesel - DTC P2122 To DTC P2689 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P245A, P245C or P245D: Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Control Circuit >> 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 Q47 Exhaust Gas Recirculation Cooler Bypass Solenoid Valve. Ignition ON.
  2. Verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF, remove the test lamp.
    2. Test for less than 2 Ω in the ignition circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF, remove the test lamp.
    2. Test for infinite resistance between the ignition circuit and ground.
      NOTE: An internal short in any component supplied by the fuse may cause the fuse to open and set a DTC when the component is activated.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, test all components connected to the ignition voltage circuit for a short and replace as necessary.
    • If the test lamp illuminates 
  3. Verify a test lamp illuminates between the control circuit terminal 2 and B+.
    • If the test lamp does not illuminate 
    1. Ignition OFF, remove the test lamp, disconnect the harness connector at the K20 Engine Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    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, replace the K20 Engine Control Module.
    • If the test lamp illuminates 
  4. Ignition OFF, verify the test lamp turns OFF within 30 s.
    NOTE: The test lamp may flash and/or re-illuminate at a low intensity after it turns off.
    • If the test lamp does not turn OFF 
    1. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K20 Engine Control Module.
    • If the test lamp turns OFF 
  5. Test or replace the Q47 Exhaust Gas Recirculation Cooler Bypass Solenoid Valve.
scientia non olet · About LEMON Manuals