1. Remove these items:
   - Center pillar upper trim
   - Quarter pillar trim
   - Roof end trim
   - Grab handle

1. Headliner is lowered.

1. Disconnect connector A (26P) and connector B (5P) (A) from the power tailgate control unit (B).

1. Inspect the connectors and socket terminals to be sure they are all making good contact.
   - If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
   - If the terminals look OK, go to Step 4 .

1. With the connector still disconnected, make these input tests at the connectors.
   - If any test indicates a problem, find and correct the cause, then recheck the system.
   - If all the input tests prove OK, go to Step 5 .

   Cavity | Wire | Test condition | Test: desired result | Possible cause if result is not obtained
   --- | --- | --- | --- | ---
   A1 | WHT/RED | Under all conditions | Check for voltage to ground: There should be battery voltage. |
   - Blown No. 7 (10 A) fuse in the under-dash fuse/relay box
   - An open in the wire
   A2 | YEL | Ignition switch ON (II) | Check for voltage to ground: There should be battery voltage. |
   - Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box
   - An open in the wire
   B2 | WHT/GRN | Under all conditions | Check for voltage to ground: There should be battery voltage. |
   - Blown No. 42 (40 A) fuse in the under-hood subfuse box
   - An open in the wire
   B1 | WHT/YEL | Under all conditions | Check for voltage to ground: There should be battery voltage. |
   - Blown No. 41 (20 A) fuse in the under-hood subfuse box
   - An open in the wire
   A24 | YEL/BLK | Under all conditions | Attach to ground: Power tailgate indicator light should come on. |
   - Blown No. 7 (10 A) fuse in the under-dash fuse/relay box
   - Faulty gauge control module
   - An open in the wire
   A15 | BLK | Under all conditions | Check for continuity to ground: There should be continuity. |
   - Poor ground (G705)
   - An open in the wire
   B3 | BLK | Under all conditions | Check for continuity to ground: There should be continuity. |
   - Poor ground (G705)
   - An open in the wire
   B5 | BLK | Under all conditions | Check for continuity to ground: There should be continuity. |
   - Poor ground (G705)
   - An open in the wire

1. Reconnect connectors A (26P) and B (5P) to the power tailgate control unit, and perform the following input taste.
   - If any test indicates a problem, find and correct the cause, then recheck the system.
   - If all input tests prove OK, the control unit must be faulty, replace the power tailgate control unit.

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if result is not obtained
   --- | --- | --- | --- | ---
   A3 | BRN | The buzzer is activated by using a HDS. | Power tailgate buzzer should come on. |
   - Faulty tailgate buzzer
   - Poor ground (G705)
   - An open in the wire
   A8 | BLU/BLK | A/T gear position in P | Check for continuity to ground : There should be continuity. |
   - Faulty transmission range switch
   - Poor ground (G101)
   - An open in the wire
   A21 | GRN/RED | Under all conditions | Check for continuity between the A21 terminal and the No. 1 terminal of the under-dash fuse/relay box connector G (6P): There should be continuity. | An open in the wire
   B4 | BLU/GRN | Under all conditions | Check for continuity between the B4 terminal and the No. 2 terminal of the power tailgate inspection connector: There should be continuity. | An open in the wire