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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> Trunk Release Malfunction >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

M40 Rear Compartment Lid Latch-Dynamic Test

  1. Ignition/Vehicle Off.
  2. Disconnect the electrical connector:M40 Rear Compartment Lid Latch
  3. Connect a jumper wire between the test points:Ground terminal 2 & Ground
  4. Momentarily connect a 10 A fused jumper wire between the test points:Control terminal 1 & 12 V

    Verify the component turns On and Off when connecting and disconnecting the jumper wire: M40 Rear Compartment Lid Latch

    • If the component does not turn On and Off  

      Replace the component:M40 Rear Compartment Lid Latch

    • If the component turns On and Off 
  5. All OK.

S58A Rear Compartment Lid Unlatch Switch - Exterior-Test

  1. Ignition/Vehicle Off.
  2. Disconnect the electrical connector: S58A Rear Compartment Lid Unlatch Switch - Exterior
  3. Test for infinite resistance between the test points: Signal terminal 1 & Ground terminal 2-Switch Not Pressed
    • If less than infinite resistance 

      Replace the component: S58A Rear Compartment Lid Unlatch Switch - Exterior

    • If infinite resistance 
  4. Test for less than 3 ohm; between the test points: Signal terminal 1& Ground terminal 2-Switch Pressed
    • If 3 or greater  

      Replace the component: S58A Rear Compartment Lid Unlatch Switch - Exterior

    • If less than 3 ohm; 
  5. All OK.

S58B Rear Compartment Lid Unlatch Switch - Interior-Test

  1. Ignition/Vehicle Off.
  2. Disconnect the electrical connector: S58B Rear Compartment Lid Unlatch Switch - Interior
  3. Test for infinite resistance between the test points: Signal terminal 1 & Ground terminal 2-Switch Not Pressed
    • If less than infinite resistance 

      Replace the component: S58B Rear Compartment Lid Unlatch Switch - Interior

    • If infinite resistance 
  4. Test for less than 3 ohm; between the test points: Signal terminal 1 & Ground terminal 2-Switch Pressed
    • If 3 ohm; or greater  

      Replace the component: S58B Rear Compartment Lid Unlatch Switch - Interior

    • If less than 3 ohm; 
  5. All OK.