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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 228 (Vehicle Access System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B1592 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

M40 Rear Compartment Lid Latch-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 7.5 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

    • Go to next step: If the component turns On and Off 
  5. All OK.
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