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Home >> Chevrolet >> 2018 >> Bolt EV Premier >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Immobilizer System >> Diagnostic Information and Procedures >> DTC P0633 >> Circuit/System Verification

Circuit/System Verification

    NOTE:

    Do NOT replace the control module if DTC B0633 is set.New control modules will stay in immobilizer learn mode until the security code is learned and the engine was started successfully.

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify no other DTCs are set.
    • Go to next step: If no other DTCs are set 
  3. Verify DTC P0633 is not set.
    • If DTC P0633 is set 
    1. Perform the SPS function: Z1 Immobilizer Function - K20 Engine Control Module Refer to: Immobilizer System Component Programming 
    2. Follow the instructions on the scan tool.
    3. Engine - Crank
    4. Verify the function: Engine = Running
      • If the engine does not start

        Refer to: Engine Starting

      • Go to next step: If the engine starts
    5. All OK.
    • Go to next step: If no DTC is set 
  4. All OK.