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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 246 (Power Door Lock System And Release Systems - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Trunk Release Malfunction >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

M40 Rear Compartment Lid Latch

  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

  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 Ω between the test points:Signal terminal 1 &Ground terminal 2 - Switch »Pressed
    • If 3 Ω or greater 

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

    • If less than 3 Ω 
  5. All OK.

S58B Rear Compartment Lid Unlatch Switch - Interior

  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 Ω between the test points:Signal terminal 1 &Ground terminal 2 - Switch »Pressed
    • If 3 Ω or greater 

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

    • If less than 3 Ω 
  5. All OK.