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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Wiring Systems And Power Management - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> Ignition Can/Cannot Be Turned Off with Transmission in Any Gear (Without BTM/ATH) >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S3 Transmission Shift Lever. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10Ω between the ground circuit terminal 2 and ground.
    • If 10Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2Ω in the ground circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, repair the open/high resistance in the ground connection.
    • If less than 10Ω 
  3. Ignition OFF, connect the harness connector at the S3 Transmission Shift Lever. Disconnect the harness connector at the M93 Key Capture Solenoid Actuator, ignition ON.
  4. Verify a test lamp illuminates between the ignition circuit terminal 1 and ground.
    • If the test lamp does not illuminate 
    1. Ignition OFF, remove the test lamp.
    2. Test for infinite resistance between the ignition circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2Ω in the ignition circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, replace the K9 body control module.
    • If the test lamp illuminates 
  5. Verify that a test lamp does not illuminate between the ignition circuit terminal 1 and the control circuit terminal 2 with the gear shift selector in NEUTRAL .
    • If the test lamp illuminates 
    1. Ignition OFF, remove the test lamp, disconnect the harness connector at the S3 Transmission Shift Lever.
    2. 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 S3 Transmission Shift Lever.
    • If the test lamp does not illuminate 
  6. Verify that a test lamp illuminates between the ignition circuit terminal 1 and the control circuit terminal 2, with the gear shift selector in PARK.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the harness connector at the S3 Transmission Shift Lever.
    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, test or replace the S3 Transmission Shift Lever.
    • If the test lamp illuminates 
  7. Test or replace the M93 Key Capture Solenoid Actuator.
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