Passive Entry Module - Description

DESCRIPTION





The Passive Entry Module (PEM) (1) is the primary component of the Passive Entry (PE) and Keyless Go (KG) systems. The PEM contains both the Central Processor Unit (CPU) and transceiver of the PE and KG systems, and is sometimes alternately referred to as the PEKG module or receiver. Concealed within the molded black plastic PEM housing is the printed circuit board and the other electronic circuitry of the module.

The PEM is secured with two screws to the substrate on the back of the instrument panel base trim, above the upper glove box opening near the passenger airbag retainer or chute. Two mounting tabs (2) at opposing corners and two connector receptacles (3) are integral to the PEM housing. The connector receptacles contain all of the terminal pins that connect the PEM to the vehicle electrical system through two dedicated take outs and connectors of the instrument panel wire harness.

There are at least two unique hardware versions of the PEM. These versions are required in order to accommodate the two Controller Area Network (CAN) data bus systems possibly found in Chrysler vehicles, CAN-B or CAN-Interior High Speed (IHS). The PEM used for this platform must be able to communicate with other electronic modules in the vehicle using the CAN-B data bus network.

The PEM cannot be adjusted or repaired and, if damaged or ineffective, it must be replaced. The PEM software is flash programmable.