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Incomplete Power Open - Latch Failure

NOTE: After making any repairs, perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  1. Using scan tool, record and erase DTCs. Turn ignition off. Wait 10 seconds. Turn ignition on. Operate power liftgate several times if possible. Recheck for DTCs. If INCOMPLETE POWER OPEN - LATCH FAILURE resets, go to next step. If INCOMPLETE POWER OPEN - LATCH FAILURE does not reset, system is operating properly at this time. Check for intermittent poor connections or faulty circuits.
  2. Visually inspect liftgate for proper alignment, damaged strikers, damaged latches or obstructions. Repair as necessary. If possible, check operation of liftgate on a known-good vehicle. If liftgate effort is excessive, diagnose power liftgate by symptom. See TROUBLE SHOOTING in POWER SLIDING DOORS & LIFTGATE article. If liftgate effort is not excessive, go to next step.
  3. Using scan tool, select INPUTS/OUTPUTS and monitor PAWL, RATCHET and FULL OPEN switch state. While monitoring FULL OPEN switch state, manually lower liftgate from full open to mid position. If FULL OPEN switch state does not change from CLOSED to OPEN, go to next step. If FULL OPEN switch state changes from CLOSED to OPEN, monitor PAWL switch state. Open liftgate to full open position. Using a screwdriver, manually move liftgate cinch/release motor latch to first click (detent). If PAWL switch state does not change from CLOSED to OPEN, go to step  9. If PAWL switch state changes from CLOSED to OPEN, monitor RATCHET switch state. Using a screwdriver, manually move liftgate cinch/release motor latch to second click (detent). If RATCHET switch state does not change from CLOSED to OPEN, go to step  12. If RATCHET switch state changes from CLOSED to OPEN, go to step  15.
  4. Turn ignition off. Disconnect Power Liftgate Module (PLGM) connector C2. See Figure. To access connector, left rear trim will need to be removed. See POWER LIFTGATE MODULE  under REMOVAL & INSTALLATION. Using DVOM, measure resistance between ground and PLGM connector C2 terminal No. 14 (Orange wire). See Figure. Open liftgate to full open position and partially close while monitoring DVOM. If resistance does not change from less than 15 ohms to greater than 1000 ohms when liftgate is partially closed, go to next step. If resistance changes from less than 15 ohms to greater than 1000 ohms when liftgate is partially closed, replace PLGM.
  5. Disconnect power liftgate motor connector. Using DVOM, measure resistance between power liftgate motor connector terminal No. 1 (Black/Orange wire) and PLGM connector C2 terminal No. 20 (Black/Light Green wire). Wiggle wiring harness with DVOM connected. If resistance is steady at 5 ohms or less, go to next step. If resistance is greater than 5 ohms or varies, repair open in ground circuit between power liftgate motor and PLGM. See POWER DOOR LOCKS in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
  6. Using DVOM, measure resistance of Orange wire between PLGM connector C2 terminal No. 14 and power liftgate motor connector terminal No. 2. Wiggle wiring harness with DVOM connected. If resistance is steady at 5 ohms or less, go to next step. If resistance is greater than 5 ohms or varies, repair open in Orange wire.
  7. Using DVOM, measure resistance between ground and PLGM connector C2 terminal No. 14 (Orange wire). Wiggle wiring harness with DVOM connected. If resistance is greater than 1000 ohms and steady, go to next step. If resistance is 1000 ohms or less or varies, repair open in Orange wire.
  8. Using DVOM, measure resistance between PLGM connector C2 terminals No. 14 (Orange wire) and No. 20 (Black/Light Green wire). Wiggle wiring harness with DVOM connected. If resistance is greater than 1000 ohms and steady, replace power liftgate motor assembly. If resistance is 1000 ohms or less or varies, repair short between Orange and Black/Light Green wires.
  9. Turn ignition off. Disconnect Power Liftgate Module (PLGM) connector C2. See Figure. To access connector, left rear trim will need to be removed. See POWER LIFTGATE MODULE  under REMOVAL & INSTALLATION. Using DVOM, measure resistance between PLGM connector C2 terminals No. 13 (Orange/Yellow wire) and No. 20 (Black/Light Green wire). See Figure. Open liftgate. Using a screwdriver, manually move liftgate cinch/release motor latch to first click (detent) and release latch while monitoring DVOM. If resistance does not change from less than 15 ohms to greater than 1000 ohms when latch is closed and released, go to next step. If resistance changes from less than 15 ohms to greater than 1000 ohms when latch is closed and released, replace PLGM.
  10. Disconnect liftgate cinch/release motor connector. See Figure. To access connector, door panel will need to be removed. For removal and installation procedures, see POWER SLIDING DOOR MODULE  under REMOVAL & INSTALLATION. Using DVOM, measure resistance between liftgate cinch/release motor connector terminal No. 1 (Black/Orange wire) and PLGM connector C2 terminal No. 20 (Black/Light Green wire). Wiggle wiring harness with DVOM connected. If resistance is steady at 5 ohms or less, go to next step. If resistance is greater than 5 ohms or varies, repair open in ground circuit between liftgate cinch/release motor and PLGM. See POWER DOOR LOCKS in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
  11. Using DVOM, measure resistance of Orange/Yellow wire between PLGM connector C2 terminal No. 13 and liftgate cinch/release motor connector terminal No. 3. Wiggle wiring harness with DVOM connected. If resistance is steady at 5 ohms or less, replace liftgate cinch/release motor. If resistance is greater than 5 ohms or varies, repair open in Orange/Yellow wire.
  12. Turn ignition off. Disconnect Power Liftgate Module (PLGM) connector C2. See Figure. To access connector, left rear trim will need to be removed. See POWER LIFTGATE MODULE  under REMOVAL & INSTALLATION. Using DVOM, measure resistance between PLGM connector C2 terminals No. 12 (Violet/Orange wire) and No. 20 (Black/Light Green wire). See Figure. Open liftgate. Using a screwdriver, manually move liftgate cinch/release motor latch to second click (detent) and release latch while monitoring DVOM. If resistance does not change from less than 15 ohms to greater than 1000 ohms when latch is closed and released, go to next step. If resistance changes from less than 15 ohms to greater than 1000 ohms when latch is closed and released, replace PLGM.
  13. Disconnect liftgate cinch/release motor connector. See Figure. To access connector, door panel will need to be removed. For removal and installation procedures, see POWER SLIDING DOOR MODULE  under REMOVAL & INSTALLATION. Using DVOM, measure resistance between liftgate cinch/release motor connector terminal No. 1 (Black/Orange wire) and PLGM connector C2 terminal No. 20 (Black/Light Green wire). Wiggle wiring harness with DVOM connected. If resistance is steady at 5 ohms or less, go to next step. If resistance is greater than 5 ohms or varies, repair open in ground circuit between full open switch and PLGM. See POWER DOOR LOCKS in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
  14. Using DVOM, measure resistance of Violet/Orange wire between PLGM connector C2 terminal No. 12 and liftgate cinch/release motor connector terminal No. 2. Wiggle wiring harness with DVOM connected. If resistance is steady at 5 ohms or less, replace liftgate cinch/release motor. If resistance is greater than 5 ohms or varies, repair open in Violet/Orange wire.
  15. Turn ignition off. Disconnect Power Liftgate Module (PLGM) connector C2. See Figure. To access connector, left rear trim will need to be removed. See POWER LIFTGATE MODULE  under REMOVAL & INSTALLATION. Using DVOM, measure resistance between PLGM connector C2 terminals No. 8 (Tan/Gray wire) and No. 9 (Tan/White wire). See Figure. If resistance is 2 ohms or less, go to next step. If resistance is greater than 2 ohms, go to step  18.
  16. Using DVOM, measure resistance between PLGM connector C2 terminals No. 8 (Tan/Gray wire) and No. 20 (Black/Light Green wire). Wiggle wiring harness with DVOM connected. If resistance is steady at greater than 100 ohms, go to next step. If resistance is 100 ohms or less or varies, repair short between Tan/Gray and Black/Light Green wires. See POWER DOOR LOCKS in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
  17. Using DVOM, measure resistance between ground and PLGM connector C2 terminals No. 8 (Tan/Gray wire). Wiggle wiring harness with DVOM connected. If resistance is steady at greater than 100 ohms, replace liftgate cinch/release motor. If resistance is 100 ohms or less or varies, repair short to ground in Tan/Gray wire.
  18. Disconnect liftgate cinch/release motor connector. See Figure. To access connector, door panel will need to be removed. For removal and installation procedures, see POWER SLIDING DOOR MODULE  under REMOVAL & INSTALLATION. Using DVOM, measure resistance of Tan/Gray wire between liftgate cinch/release motor connector terminal No. 6 and PLGM connector C2 terminal No. 8. Wiggle wiring harness with DVOM connected. If resistance is steady at 5 ohms or less, go to next step. If resistance is greater than 5 ohms or varies, repair open in Tan/Gray wire.
  19. Using DVOM, measure resistance of Tan/White wire between liftgate cinch/release motor connector terminal No. 5 and PLGM connector C2 terminal No. 9. Wiggle wiring harness with DVOM connected. If resistance is steady at 5 ohms or less, replace liftgate cinch/release motor. If resistance is greater than 5 ohms or varies, repair open in Tan/White wire.
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