AUTO OPEN OPERATION NOT PERFORMED [POWER LIFTGATE (PLG) SYSTEM]

id0903c9090200

Caution
•  If the power supply voltage of the power liftgate (PLG) control module is less than 5 V, the fail-safe function disables the power liftgate (PLG) system operation. To cancel the fail-safe function, it is necessary to disconnect and reconnect the negative battery terminal while the power supply voltage of the power liftgate (PLG) control module is 10.5 V or more.
•  If the negative battery terminal is disconnected with the power liftgate (PLG) fully opened or half-open, the auto open/close operation is disabled. In this case, it is necessary to perform the power liftgate (PLG) initial setting when the negative battery terminal is reconnected. (See POWER LIFTGATE (PLG) INITIALIZATION PROCEDURE.)

Description
•  Auto open operation is not performed with the ignition switched ON (engine off or on).
Possible Causes
Note
The power liftgate may not operate under the following conditions:
•  Vehicle is parked on a steep incline.
•  Vehicle is parked on a steep decline.
•  Strong winds are present.
•  The power liftgate has a substantial amount of snow on it.
•  Liftgate opener switch malfunction
•  Liftgate latch and lock actuator malfunction
•  Power liftgate (PLG) front switch malfunction
•  Remote transmitter malfunction
•  Power liftgate (PLG) drive unit malfunction
•  Power liftgate (PLG) control module malfunction
•  Open circuit in wiring harness between the following terminals:
?  Power liftgate (PLG) control module terminal 1Z and liftgate opener switch terminal C
?  Power liftgate (PLG) control module terminal 1AC and power liftgate (PLG) front switch terminal J
?  Power liftgate (PLG) control module terminal 1Y and power liftgate (PLG) front switch terminal I
•  Short to ground in wiring harness between the following terminals:
?  Power liftgate (PLG) control module terminal 1Z and liftgate opener switch terminal C
?  Power liftgate (PLG) control module terminal 1AC and power liftgate (PLG) front switch terminal J
?  Power liftgate (PLG) control module terminal 1Y and power liftgate (PLG) front switch terminal I

Diagnostic Procedure

Step

Inspection

Action
1
DETERMINE IF MALFUNCTION CAUSE IS POWER LIFTGATE (PLG) CONTROL MODULE OR SWITCH
•  Operate all the following switches and verify that the auto open operation is not performed.
?  Liftgate opener switch
?  Power liftgate (PLG) front switch
?  Power liftgate (PLG) button of remote transmitter
•  Is the auto open operation performed by any of the switches?
Yes
Verify the operation condition by operating each switch.
•  If the auto open operation is not performed by the liftgate opener switch:
Go to Step 2.
•  If the auto open operation is not performed by the power liftgate (PLG) front switch:
Go to Step 4.
•  If the auto open operation is not performed by the remote transmitter:
Go to Step 6.
No
Go to Step 7.
2
VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN POWER LIFTGATE (PLG) CONTROL MODULE AND LIFTGATE OPENER SWITCH
•  Disconnect the negative battery terminal.
•  Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side).
?  Power liftgate (PLG) control module terminal 1Z and liftgate opener switch terminal C
•  Is there continuity?
Yes
Go to the next step.
No
•  Repair or replace the wiring harness which has an open circuit.
•  After performing the repair, go to Step 9.
3
VERIFY IF MALFUNCTION CAUSE IS SHORT TO GROUND IN WIRING HARNESS BETWEEN POWER LIFTGATE (PLG) CONTROL MODULE AND LIFTGATE OPENER SWITCH
•  Disconnect the negative battery terminal.
•  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 1Z and ground
•  Is there continuity?
Yes
•  Repair or replace the wiring harness which is shorted to ground.
•  After performing the repair, go to Step 9.
No
Replace the liftgate opener switch, then go to Step 9.
(See LIFTGATE OPENER SWITCH REMOVAL/INSTALLATION.)
4
VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN POWER LIFTGATE (PLG) CONTROL MODULE AND POWER LIFTGATE (PLG) FRONT SWITCH
•  Disconnect the negative battery terminal.
•  Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side).
?  Power liftgate (PLG) control module terminal 1AC and power liftgate (PLG) front switch terminal J
?  Power liftgate (PLG) control module terminal 1Y and power liftgate (PLG) front switch terminal I
•  Is there continuity?
Yes
Go to the next step.
No
•  Repair or replace the wiring harness which has an open circuit.
•  After performing the repair, go to Step 9.
5
VERIFY IF MALFUNCTION CAUSE IS SHORT TO GROUND IN WIRING HARNESS BETWEEN POWER LIFTGATE (PLG) CONTROL MODULE AND POWER LIFTGATE (PLG) FRONT SWITCH
•  Disconnect the negative battery terminal.
•  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 1AC and ground
?  Power liftgate (PLG) control module terminal 1Y and ground
•  Is there continuity?
Yes
•  Repair or replace the wiring harness which is shorted to ground.
•  After performing the repair, go to Step 9.
No
Replace the power liftgate (PLG) front switch, then go to Step 9.
(See POWER LIFTGATE (PLG) FRONT SWITCH REMOVAL/INSTALLATION.)
6
DETERMINE IF MALFUNCTION CAUSE IS REMOTE TRANSMITTER
•  Verify if the doors can be locked/unlocked using the remote controller.
•  Can the doors be locked/unlocked?
Yes
Replace the remote transmitter, then go to Step 9.
No
Refer to SYMPTOM TROUBLESHOOTING [SECURITY AND LOCKS] and resolve the malfunction.
(See LOCK/UNLOCK OPERATION NOT POSSIBLE USING REMOTE TRANSMITTER [SECURITY AND LOCKS].)
7
DETERMINE IF MALFUNCTION CAUSE IS LIFTGATE LATCH AND LOCK ACTUATOR
•  Inspect the liftgate latch and lock actuator.
•  Is the liftgate latch and lock actuator normal?
Yes
Go to the next step.
No
Replace the liftgate latch and lock actuator, then go to the next step.
(See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
8
DETERMINE IF MALFUNCTION CAUSE IS POWER LIFTGATE (PLG) CONTROL MODULE OR POWER LIFTGATE (PLG) DRIVE UNIT
•  Inspect the power liftgate (PLG) drive unit.
•  Is the power liftgate (PLG) drive unit normal?
Yes
Replace the power liftgate (PLG) control module, then go to the next step.
(See POWER LIFTGATE (PLG) CONTROL MODULE REMOVAL/INSTALLATION.)
No
Replace the power liftgate (PLG) drive unit, then go to the next step.
(See POWER LIFTGATE (PLG) DRIVE UNIT REMOVAL/INSTALLATION
9
VERIFY IF MALFUNCTION IS RESOLVED
•  Operate all the following switches and verify that the auto open operation is performed.
?  Liftgate opener switch
?  Power liftgate (PLG) front switch
?  Power liftgate (PLG) button of remote transmitter
•  Is the auto open operation performed normally by all the switches?
Yes
Troubleshooting completed. (Explain the contents of the servicing to the customer.)
No
If the malfunction has not been resolved, repeat the inspection from Step 1.