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Home >> Chevrolet >> 2021 >> Malibu L >> Repair and Diagnosis >> Electrical >> Starter >> 12 V Starting And Charging - Diagnostic Information And Procedures (2 Of 2) >> Diagnostic Information and Procedures >> Starter Malfunction (KL9) >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On/Vehicle - In Service Mode
    2. NOTE:

    Steps 2 and 3 are for vehicles equipped with a push button ignition switch. If the vehicle is not equipped with a push button ignition switch, continue to step 4.

  2. Brake Pedal - Applied

    Verify the scan tool parameter: Brake Pedal Position Sensor = Active

    • If not the specified value 

      Refer to Stop Lamps Malfunction for diagnosis of the B22 Brake Pedal Position Sensor.

    • Go to next step: If the specified value 
  3. Brake Pedal - Released

    Verify the scan tool parameter: Brake Pedal Position Sensor = Inactive

    • If not the specified value 

      Refer to Stop Lamps Malfunction for diagnosis of the B22 Brake Pedal Position Sensor.

    • Go to next step: If the specified value 
  4. Ignition - On/Vehicle - In Service Mode
  5. Verify that no DTCs are set.
    • Go to next step: If no DTC is set 
  6. {If available} Verify the scan tool parameter: Park/Neutral Position Switch = Park
    • Go to next step: If the specified state 
  7. Ignition - Crank

    Verify the scan tool parameter:

    • {Without BTM and/or ATH/ATS} 5 V Ignition Switch = Crank Request & Accessory = Inactive
    • {With BTM and/or ATH/ATS} Engine Control Module - Power Mode = Crank Request
    • Go to next step: If the specified state 
  8. Verify the scan tool parameter: Crankshaft Position Active Counter = Does not Increment
    • If the parameter value increments 

      Replace the component: B26 Crankshaft Position Sensor

    • Go to next step: If the parameter value does not increment 
  9. Verify the component works as specified: Engine - Rotate(s)
    • If the component does not work as specified 

      Verify the following conditions do not exist:

    1. Accessory drive belt component - Seized
    2. Engine - Seized
    • Go to next step: If the component works as specified 
  10. Ignition - Crank

    Verify the component works as specified:

    • M64 Starter Motor = Activated - Rotate(s)
    • Engine = Cranking
    • {M64 Starter Motor = Rotate(s) & Cranking = No} If the component does not work as specified 

      Refer to: Test 1

    • {M64 Starter Motor Rotate(s) & Starter Pinion = Clicks} If the component does not work as specified 

      Refer to: Test 2

    • Go to next step: If the component works as specified 
  11. All OK.
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