Diesel Exhaust Fluid (DEF) Heater Control
WARNING: This page is about a different variant/trim than selected.
The glow plug control module supplies and monitors voltage to the 3 Diesel Exhaust Fluid heaters. The engine control module (ECM) requests any or all of the heaters to be on depending on ambient temperature. The glow plug control module will disable diesel exhaust fluid heater requests from the ECM during glow plug operation.