Circuit/System Verification

Ignition ON.
Verify the K194 Rear Gate Module is programmed with the latest and correct software.
- If the software is not the latest or is not the correct software
  Refer to Control Module References for rear gate module replacement, programming and setup.
- Go to next step: If the software is the latest and is correct
Verify the K194 Rear Gate Module does not have any current DTCs set.
- If the K194 Rear Gate Module has current DTCs set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If the K194 Rear Gate Module does not have any current DTCs set
Verify DTC B176B or B1576 is not set as a history DTC.
- DTC B176B is set only as history
  Refer to Rear License Plate Lamp Module Replacement
- DTC B1576 is set only as history
  Refer to Rear End Spoiler Replacement
- Go to next step: If the K194 Rear Gate Module does not have any history DTCs set
Liftgate Closed, verify the scan tool Rear Gate Latch Unlatch Switch, Rear Gate Latch Primary Switch, and Rear Gate Latch Neutral Switch parameters are as listed below:
- Rear Gate Latch Unlatch Switch parameter Inactive
- Rear Gate Latch Primary Switch parameter Inactive
- Rear Gate Latch Neutral Switch parameter Inactive
- If any of the parameters are not as listed
  Refer to DTC B1584, B1ABB, or B1ABC - Liftgate Latch Switches Malfunction
- Go to next step: If the parameters are as listed
Verify the A23C Liftgate Latch will activate and release the liftgate when pressing the appropriate button on the keyless entry transmitter twice.
- If the A23C Liftgate Latch does not activate
  Refer to Liftgate Latch Release/Cinch Malfunction
- Go to next step: If the A23C Liftgate Latch does activate
Ignition ON, all vehicle doors unlocked, verify the liftgate mode switch is set to Full or 3/4
Verify the liftgate will unlatch and power open while pressing the S45A Liftgate Release Switch - Exterior.
- If the liftgate does not release and power open
  Refer to DTC B16C5 (TC2) , or DTC B16C5 (TB4)
- Go to next step: If the liftgate does release and power open
Liftgate Open, verify the scan tool parameter Rear Gate Travel is greater than 70%
- If not the specified value or the parameter does not change
  Refer to DTC B1589 or B158A - Liftgate Angle Sensor Malfunction
- Go to next step: If greater than the specified value
Liftgate Open, verify that the liftgate will remain at or near the full open position and does not slowly close.
- If the liftgate will not remain open or begins to slowly close
  Refer to Liftgate Strut Replacement (manual) , or Liftgate Strut Replacement (power)
- Go to next step: If the liftgate remains in the full open position
Liftgate Open, verify the scan tool Rear Gate Anti-pinch Sensor Raw Voltage parameter is between 3 V-3.5 V.
- If not between 3 V-3.5 V
  Refer to DTC B1576 - Liftgate Object Sensor Malfunction
- Go to next step: If between 3 V-3.5 V
Liftgate Open, verify the scan tool Rear Gate Latch Unlatch Switch, Rear Gate Latch Primary Switch, and Rear Gate Latch Neutral Switch parameters are as listed below:
- Rear Gate Latch Unlatch Switch Status parameter Active
- Rear Gate Latch Primary Switch Status parameter Active
- Rear Gate Latch Neutral Switch Status parameter Inactive
- If any of the parameter are not as listed
  Refer to DTC B1584, B1ABB, or B1ABC - Liftgate Latch Switches Malfunction
- Go to next step: If the parameters are as listed
Verify the scan tool Rear Gate Close Switch parameter changes between Active and Inactive when pressing the B70 Liftgate Close Switch.
- If the parameter does not change
  Refer to DTC B1578 - Liftgate Close Switch Malfunction
- Go to next step: If the parameter changes
Verify the liftgate will perform the power open function when pressing the S45A Liftgate Release Switch - Exterior.
- If the liftgate does not power close and sets DTC B158B or DTC B158C
  Refer to DTC B158B or B158C - Liftgate Motor Power Open/Close Malfunction
- Go to next step: If the liftgate does power open
Verify the liftgate will perform the power open function when pressing the S45 Liftgate Control Switch.
- If the liftgate does not power open
  Replace the component: Liftgate Release Switch Replacement
- Go to next step: If the liftgate does power open
Set the S45 Liftgate Control Switch to the 3/4 mode.
Command the power liftgate to open by pressing the S45 Liftgate Control Switch.
Verify the liftgate performs the power open function and stops at the garage mode position.
- If the liftgate will only perform the full open operation.
  Replace the component: Liftgate Release Switch Replacement
- Go to next step: If the liftgate performs the power open function and stops at the garage mode position.

NOTE:

Refer to the owner's manual for the location of the kick sensors prior to performing the kicking motion

If equipped, liftgate Closed, with the keyless entry transmitter within 3 feet (1 meter) of the liftgate, activate the rear closure hands free release system with a kicking motion of a foot under the rear fascia. The tail lamps will flash 3 times if the rear closure hands free sensors detect the motion.
- If the tail lamps do not flash
  Refer to Liftgate Handsfree Sensor Malfunction
- Go to next step: If the tail lamps flash
All OK.