Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR ACTIVE DTCS
1. With the scan tool, record and erase the DTCs.
2. Cycle the ignition off, wait 10 seconds, then cycle the ignition on.
3. If possible, operate the liftgate several times.
4. With the scan tool, read the Active DTCs.
  Does the scan tool display; B1952-00-POWER LIFTGATE DRIVE MOTOR - INCORRECT DIRECTION?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and poor pin fit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (Q88) LIFTGATE OPEN DRIVER CIRCUIT AND THE (Q89) LIFTGATE CLOSE DRIVER CIRCUITS ARE CROSSED
1. Cycle the ignition off.
2. Disconnect the Power Liftgate Module C1 harness connector.
3. Disconnect the Power Liftgate Drive Unit harness connector.
4. Inspect the Power Liftgate Drive Unit and Power Liftgate Module connectors, terminals and harness for damaged or pushed out terminals, or pinched/broken wires. Repair any obvious problems.
5. Trace the (Q88) Liftgate Open Driver circuit and the (Q89) Liftgate Close Driver circuits between the PLGM C1 harness connector and the Drive Unit harness connector.
  Are the circuits crossed at either connector?
  
  Yes
  - Correct the wiring as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (Q204) POSITION SENSOR SIGNAL 1 AND THE (Q205) POSITION SENSOR SIGNAL 2 CIRCUITS ARE CROSSED
1. Inspect the Power Liftgate Drive Unit and Power Liftgate Module connectors, terminals and harness for damaged or pushed out terminals, or pinched/broken wires. Repair any obvious problems.
2. Trace the (Q204) Liftgate Position Sensor 1 Signal circuit and the (Q205) Liftgate Position Sensor 2 Signal circuits between the Power Liftgate Module C1 harness connector and the Power Liftgate Drive Unit harness connector.
  Are the circuits crossed at either connector?
  
  Yes
  - Correct the wiring as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Power Liftgate Drive Unit in accordance with the Service Information. Refer to DRIVE UNIT, POWER, REMOVAL .
  - Test complete. Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .