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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 >> DTC B3265: Trunk Lid Unlatch Output Circuit >> Circuit/System Testing

Circuit/System 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.
    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems » Off
  2. Disconnect the electrical connector:X3X53A Fuse Block - Rear Body
  3. Test for less than 10 Ω between the test points:Ground circuit terminal 12X3 &Ground
    • If 10 Ω or greater 
    1. Ground Connection»Disconnect
    2. Test for less than 2 Ω between the test points:Ground circuit terminal 12X3&Ground Connection
      • If 2 Ω or greater » Repair the open/high resistance in the circuit.
      • If less than 2 Ω » Repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  4. Connect the electrical connector:X3X53A Fuse Block - Rear Body
  5. Disconnect the electrical connector:X5K9 Body Control Module
  6. Ignition » On / Vehicle » In Service Mode
  7. Momentarily connect a 3 A fused jumper wire between the test points:Control circuit terminal 11X5&B+

    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 
    1. Ignition/Vehicle » Off & Remove » Jumper wire(s)
    2. Disconnect the electrical connector:X3X53A Fuse Block - Rear Body
    3. Ignition » On / Vehicle » In Service Mode
    4. Test for less than 1 V between the test points:Control circuit terminal 11X5 @Control module harness&Ground
      • If 1 V or greater » Repair the short to voltage on the circuit.
      • If less than 1 V
    5. Ignition/Vehicle » Off
    6. Test for infinite resistance between the test points:Control circuit terminal 11X5@Control module harness&Ground
      • If less than infinite resistance » Repair the short to ground on the circuit.
      • If infinite resistance
    7. Test for less than 2 Ω between the test points:Control circuit terminal 11X5@Control module harness&Terminal 21X3@Fuse Block Harness
      • If 2 Ω or greater » Repair the open/high resistance in the circuit.
      • If less than 2 Ω» Test or replace the component:X53A Fuse Block - Rear Body
    • If the component turns On and Off 
  8. Replace the component:K9 Body Control Module
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