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Circuit/System Testing

Test 1

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: M33 Liftgate Window Latch
  3. Verify a test lamp illuminates between ground circuit terminal 2 and B+.
    • If the test lamp does not illuminate 
    1. Repair the open/high resistance on circuit 2050 or the ground connection.
    • Go to next step: If the test lamp illuminates 
  4. Connect the electrical connector: M33 Liftgate Window Latch
  5. Disconnect the electrical connector: X1@X53A Body Wiring Harness Junction Block - Rear
  6. Momentarily connect a 10 A fused jumper wire between control circuit terminal 35 and B+.
  7. Verify the component produces a clicking sound: M33 Liftgate Window Latch
    • If a click cannot be heard or felt and the 10 A fuse is OK. 
    1. Test circuit 4089 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit or ground connection.
      • Go to next step: If an open/high resistance is not found.
    2. Test circuit 4089 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found.
    3. Repair or replace the M33 Liftgate Window Latch
    • If a click cannot be heard or felt and the 10 A fuse is open. 
    1. Test circuit 4089 for a short to ground.
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found.
    2. Repair or replace M33 Liftgate Window Latch
    • Go to next step: If a click can be heard or felt 
  8. Verify a test lamp illuminates between ground circuit terminal 5 X1 and B+.
    • If the test lamp does not illuminate 
    1. Repair the open/high resistance on circuit 2050 or the ground connection.
    • Go to next step: If the test lamp illuminates 
  9. Connect the electrical connector: X1@X53A Body Wiring Harness Junction Block - Rear
  10. Disconnect the electrical connector: X7@K9 Body Control Module
  11. Ignition - On / Vehicle - In Service Mode
  12. Momentarily connect a 3 A fused jumper wire between the test points: Control circuit terminal 17 X7 & B+
  13. Verify the component produces a clicking sound: M33 Liftgate Window Latch
    • If a click cannot be heard or felt and the 3 A fuse is OK. 
    1. Test circuit 6188 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit or ground connection.
      • Go to next step: If an open/high resistance is not found.
    2. Test circuit 6188 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found.
    3. Replace the X53A Body Wiring Harness Junction Block - Rear for an internal fault.
    • If a click cannot be heard or felt and the 3 A fuse is open. 
    1. Test circuit 6188 for a short to ground.
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found.
    2. Replace X53A Body Wiring Harness Junction Block - Rear for an internal fault.
    • Go to next step: If a click can be heard or felt 
  14. Replace the K9 Body Control Module.

Test 2

  1. Ignition/vehicle OFF, disconnect the connector at the S141 Liftgate Window Release Switch - Exterior
  2. Verify a test lamp illuminates between ground circuit terminal 2 and B+.
    • If the test lamp does not illuminate 
    1. Repair the open/high resistance on circuit 2050 or the ground connection.
    • Go to next step: If the test lamp illuminates 
  3. Ignition/vehicle On.
  4. Verify the M33 Liftgate Window Latch is not Active
    • If Active 
    1. Test the circuit 6190 for a short to ground
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found.
    2. Replace the K194 Rear Gate Module.
    • Go to next step: If Inactive 
  5. Momentarily install a 3 A fused jumper wire between the signal circuit terminal 1 and ground.
  6. Verify the component produces a clicking sound: M33 Liftgate Window Latch
    • If the component does not produce a sound and the 3 A fuse is OK 
    1. Test the circuit 6190 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found.
    2. Replace the K194 Rear Gate Module.
    • If the component does not produce a sound and the 3 A fuse is open 
    1. Test the circuit 6190 for a short to voltage.
      • If a short to voltage is found, repair the fault on the circuit.
      • Go to next step: If a short to voltage is not found.
    2. Replace the K194 Rear Gate Module.
    • Go to next step: If the component produces a sound 
  7. Replace the S141 Liftgate Window Release Switch - Exterior
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