Description And Operation

WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.

DESCRIPTION

Courtesy of CHRYSLER GROUP, LLC

Glow Plug Module

The Glow Plug Module (2) is located next to the Fuel Filter.

OPERATION

The Glow Plug Module is connected to a fused B(+) circuit and receives a path to ground at all times through the engine wiring harness. These connections allow it to remain functional regardless of the Electronic Ignition Switch (EIS) position. When the Powertrain Control Module (PCM) receives the On and Ignition Run signals from the EIS, it will send a signal to actuate the Glow Plug Module for a period of time that depends on ambient air and engine coolant temperature.

The Glow Plug Module utilizes integrated relays and micro-controllers to actuate the Glow Plugs based on input from the PCM. The Glow Plug Module has on-board diagnostic functions that will set powertrain DTCs, which will be transmitted to the PCM. Because the Glow Plug Module uses micro-controllers to control battery voltage to the Glow Plugs, conventional diagnostic methods will not always prove conclusive when diagnosing problems with the Glow Plug Module and related circuits. For proper diagnosis of the Glow Plug Module, and the electronic communication related to Glow Plug Module operation, a diagnostic scan tool is required. Refer to COMMUNICATION, DESCRIPTION AND OPERATION .