No.7 LIFTGATE OPEN/CLOSE SPEED IS UNSTABLE WHILE AUTO OPEN/CLOSE FUNCTION [POWER LIFTGATE (PLG) SYSTEM]

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7 | Liftgate open/close speed is unstable while auto open/close function
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DESCRIPTION | • Liftgate operation speed is not stable (be fast or slow reiterate or suddenly) while open or close operation.
POSSIBLE CAUSE | • Malfunction in liftgate link mechanism ― Stay dumper malfunction • Malfunction in PLG link mechanism ― PLG arm malfunction ― PLG slider malfunction • PLG control module does not receive rotation sensor signal properly. ― Rotation sensor malfunction (missing signal) ― Temporary open or short to POWER/ground/other harness in wiring harness 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
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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 WIRING HARNESS BETWEEN PLG DRIVE UNIT AND PLG CONTROL MODULE • Turn the ignition switch to OFF 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.
5 | INSPECT MALFUNCTION IS IN PLG DRIVE UNIT OR PLG CONTROL MODULE • Replace the PLG drive unit. (See POWER LIFTGATE (PLG) DRIVE UNIT REMOVAL/INSTALLATION.) • Is the symptom solved? | Yes | Troubleshooting is completed. (Malfunction in drive unit)
No | Replace the PLG control module. (See POWER LIFTGATE (PLG) CONTROL MODULE REMOVAL/INSTALLATION.)