No.5 LIFTGATE TURNS OVER OPERATION AND PLG BUZZER SOUNDS 3 TIMES, WHILE AUTO OPEN/CLOSE FUNCTION [POWER LIFTGATE (PLG) SYSTEM]

id0903c9999600

5

Liftgate reverses and PLG buzzer sounds 3 times, while auto open/close function
DESCRIPTION
•  Liftgate reverses while auto open or close operation without object is pinched, the switches (PLG front switch, PLG rear switch and/or transmitter) are operated and/or liftgate outer handle is operated.
•  PLG buzzer sounds 3 times when the liftgate reverses.
POSSIBLE CAUSE
•  Misdetection of liftgate pinch
―  Malfunction in liftgate link mechanism
•  Stay dumper malfunction
―  Malfunction in PLG link mechanism
•  PLG arm malfunction
•  PLG slider malfunction
•  Torque cable malfunction
―  PLG control module does not receive rotation sensor signal properly.
•  Rotation sensor malfunction (missing pulse)
•  Temporary open or short to POWER/ground/other harness in wiring between PLG drive unit and PLG control module
•  Malfunction in PLG drive unit (motor or clutch malfunction)
•  PLG control module malfunction

When performing an asterisked (*) troubleshooting inspection, slightly shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, verify that the connectors, terminals and wiring harnesses are connected correctly and undamaged.

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT STAY DUMPER
•  Inspect the stay dumper for following points;
―  Rebound force
―  Deformation
•  Is the problem detected?
Yes
Replace the stay dumper.
(See LIFTGATE REMOVAL/INSTALLATION.)
No
Go to the next step.
2
INSPECT PLG ARM
•  Inspect the PLG arm for following points;
―  Deformation
―  Ball joint condition (sticking)
•  Is the problem detected?
Yes
Replace the PLG arm.
(See POWER LIFTGATE (PLG) ARM REMOVAL/INSTALLATION.)
No
Go to the next step.
3
INSPECT PLG SLIDER
•  Inspect the PLG slider for following points;
―  Mechanical resistance
―  Deformation
―  Bite foreign material
―  Sticking
•  Is the problem detected?
Yes
Replace the PLG slider.
(See POWER LIFTGATE (PLG) SLIDER REMOVAL/INSTALLATION.)
No
Go to the next step.
4
INSPECT TORQUE CABLE
•  Inspect the torque cable for following points;
―  Mechanical resistance
―  Sticking
•  Is the problem detected?
Yes
Replace the PLG slider.
(See POWER LIFTGATE (PLG) SLIDER REMOVAL/INSTALLATION.)
No
Go to the next step.
5*
INSPECT WIRING HARNESS BETWEEN PLG DRIVE UNIT AND PLG CONTROL MODULE
•  Turn the ignition switch to LOCK position.
•  Disconnect the PLG drive unit and PLG control module connectors.
•  Inspect for open or short to POWER/ground/other harness circuit between PLG drive unit and PLG control module.
―  Between PLG drive unit terminal A and PLG control module terminal 1E
―  Between PLG drive unit terminal B and PLG control module terminal 1F
―  Between PLG drive unit terminal M and PLG control module terminal 2I
―  Between PLG drive unit terminal N and PLG control module terminal 2G
―  Between PLG drive unit terminal F and PLG control module terminal 2J
―  Between PLG drive unit terminal J and PLG control module terminal 2L
―  Between PLG drive unit terminal E and PLG control module terminal 2K
―  Between PLG drive unit terminal I and PLG control module terminal 2N
•  Is the open or short circuit detected?
Yes
Repair or replace malfunctioning part.
No
Go to the next step.
6
INSPECT ROTATION SENSOR SIGNAL
•  Measure the pulse profile using an oscilloscope at PLG control module terminal 2L and 2J.
•  Is abnormal pulse (missing) appeared immediately before liftgate reverses?
Yes
Replace the PLG drive unit.
(See POWER LIFTGATE (PLG) DRIVE UNIT REMOVAL/INSTALLATION.)
No
Replace the PLG control module.
(See POWER LIFTGATE (PLG) CONTROL MODULE REMOVAL/INSTALLATION.)