Why can't rear hatch be opened? - 2002 Chrysler PT Cruiser

Won't open with the key ? Do all the other doors lock an unlock ? You have to understand the electronics involved , you have a remote keyless entry module an all switches are an input to the (RKEM) , an from the voltage input it knows what door to open or unlock or lock . First you would need a wiring diagram to test the circuit an you need to pull the inside panel off the rear hatch to get at the motor to see if the power is getting to it. Can be a very time consuming job. Here check out this video ,it's not the same vehicle as yours but it will give you an idea of what's involved . 2008 2012 Ford Escape Liftgate Latch Won Open Access Diagnosis Repair