AUTO CLOSURE DOES NOT OPERATE [POWER LIFTGATE (PLG) SYSTEM]

id0903c9090100

Description

• The auto closure does not operate with the ignition switched ON (engine off or on).

Possible Causes

• Dirt or foreign matter on power liftgate (PLG) touch sensor

• Liftgate latch and lock actuator malfunction

• Power liftgate (PLG) control module malfunction

• Open circuit in wiring harness between the following terminals:

? Power liftgate (PLG) control module terminal 2J and liftgate latch and lock actuator terminal A

? Power liftgate (PLG) control module terminal 2G and liftgate latch and lock actuator terminal B

• Short to ground in wiring harness between the following terminals:

? Power liftgate (PLG) control module terminal 2J and liftgate latch and lock actuator terminal A

? Power liftgate (PLG) control module terminal 2G and liftgate latch and lock actuator terminal B

Diagnostic Procedure

Step	Inspection		Action
1	POWER LIFTGATE (PLG) TOUCH SENSOR INSPECTION • Visually inspect the power liftgate (PLG) touch sensor for the following. ? Dirt ? Adhered foreign matter • Is there dirt or foreign matter on the power liftgate (PLG) touch sensor?	Yes	Remove dirt or foreign matter, then go to the next step.
1		No	Go to the next step.
2	VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN POWER LIFTGATE (PLG) CONTROL MODULE AND LIFTGATE LATCH AND LOCK ACTUATOR • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the power liftgate (PLG) control module connector. • Disconnect the liftgate latch and lock actuator connector. • Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side). ? Power liftgate (PLG) control module terminal 2J and liftgate latch and lock actuator terminal A ? Power liftgate (PLG) control module terminal 2G and liftgate latch and lock actuator terminal B • Is there continuity?	Yes	Go to the next step.
2		No	• Repair or replace the wiring harness which has an open circuit. • After performing the repair, go to Step 4.
3	VERIFY IF MALFUNCTION CAUSE IS SHORT TO GROUND IN WIRING HARNESS BETWEEN POWER LIFTGATE (PLG) CONTROL MODULE AND LIFTGATE LATCH AND LOCK ACTUATOR • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the power liftgate (PLG) control module connector. • Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side). ? Power liftgate (PLG) control module terminal 2J and ground ? Power liftgate (PLG) control module terminal 2G and ground • Is there continuity?	Yes	• Repair or replace the wiring harness which is shorted to ground. • After performing the repair, go to Step 4.
3		No	Go to the next step.
4	DETERMINE IF MALFUNCTION CAUSE IS POWER LIFTGATE (PLG) CONTROL MODULE OR LIFGTAGE LATCH AND LOCK ACTUATOR • Inspect the liftgate latch and lock actuator. (See LIFTGATE LATCH AND LOCK ACTUATOR INSPECTION.) • Is the liftgate latch and lock actuator normal?	Yes	Replace the power liftgate (PLG) control module, then go to the next step. (See POWER LIFTGATE (PLG) CONTROL MODULE REMOVAL/INSTALLATION.)
4		No	Replace the liftgate latch and lock actuator, then go to the next step. (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
5	VERIFY IF MALFUNCTION CAUSE IS CORRECTED • Has the malfunction symptom been eliminated?	Yes	Troubleshooting completed. (Explain the contents of the servicing to the customer.)
5		No	If the malfunction has not been resolved, repeat the inspection from Step 1.