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Home >> Jeep >> 2020 >> Grand Cherokee Trackhawk >> Repair and Diagnosis >> External Pages >> Different car >> Section 409 ((Power Liftgate Module (PLGM) - Electrical Diagnostics)) >> DTC Troubleshooting >> B1978-00 Power Liftgate Close Direction - Sector Switch Performance >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2019 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
BINDING LIFTGATE
LATCH NOT IN HOME POSITION
LOGIC GROUND CIRCUIT OPEN
SECTOR SWITCH SENSE CIRCUIT OPEN
SECTOR SWITCH SENSE CIRCUIT SHORTED TO VOLTAGE
SECTOR SWITCH SENSE CIRCUIT SHORTED TO GROUND
POWER LIFTGATE LATCH
POWER LIFTGATE MODULE (PLGM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.  Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .