LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2015 >> Volt >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Wiring Systems And Power Management - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P2537: Ignition Accessory Switch Circuit >> Circuit/System Testing >> Engine Control Module Circuit Malfunction

Engine Control Module Circuit Malfunction

  1. Vehicle OFF and all vehicle systems off, disconnect the X1 harness connector at the K20 Engine Control Module.
  2. Vehicle in Service Mode.
  3. Verify a test lamp illuminates between the Accessory Wake up Serial Data 2 circuit terminal 18 and ground.
    • If the test lamp does not illuminate 
    1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the KR114B Hybrid/EV Powertrain Control Module 2.
    2. Test for less than 2 Ω on the Accessory Wake up Serial Data 2 circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the KR114B Hybrid/EV Powertrain Control Module 2.
    • If the test lamp illuminates 
  4. Replace the control module setting the K20 Engine Control Module.
scientia non olet · About LEMON Manuals