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Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Power Door Lock System And Vehicle Access System) >> Diagnostic Information and Procedures >> Power Door Locks Malfunction >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

Central Door Lock Switch

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: S48A Multifunction Switch - Instrument Panel
  3. Test for infinite resistance between the test points:
    • Signal terminal 9 & Ground terminal 1 - Lock Switch - Not Pressed
    • Signal terminal 11 & Ground terminal 1 - Unlock Switch - Not Pressed
    • If less than infinite resistance 

      Replace the component: S48A Multifunction Switch - Instrument Panel

    • Go to next step: If infinite resistance 
  4. Test for less than 3 ohms between the test points: Signal terminal 11 & Ground terminal 1 - Lock Switch - Pressed
    • If 3 ohms or greater 

      Replace the component: S48A Multifunction Switch - Instrument Panel

    • Go to next step: If less than 3 ohms 
  5. Test for less than 3 ohms between the test points: Signal terminal 9 & Ground terminal 1 - Unlock Switch - Pressed
    • If 3 ohms or greater 

      Replace the component: S48A Multifunction Switch - Instrument Panel

    • Go to next step: If less than 3 ohms 
  6. All OK.

A23 Door Latch Assembly

  1. Ignition/Vehicle - Off
  2. Disconnect the appropriate electrical connector:
    • A23D Door Latch Assembly - Driver
    • A23P Door Latch Assembly - Passenger
  3. Connect a 25 A fused jumper wire between the test points:
    • A23D Door Latch Assembly - Driver: Control terminal 2 & B+
    • A23P Door Latch Assembly - Passenger: Control terminal 7 & B+
    4. CAUTION:

    Complete the testing as quickly as possible in order to prevent overheating and damaging the component.

  4. Momentarily connect a jumper wire between the test points:
    • A23D Door Latch Assembly - Driver: Control terminal 3 & Ground
    • A23P Door Latch Assembly - Passenger: Control terminal 8 & Ground
  5. Reverse the jumper wires 2 times between the terminals.

    Verify the component works as specified: A23 Door Latch Assembly = Lock & Unlock

    • If not the specified state 

      Replace the component: A23 Door Latch Assembly

    • Go to next step: If the specified state 
  6. All OK.
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