Engine Brake

T o activate the engine brake, move the engine brake switch the 1st 2nd position. The 1st position activates the engine brake unit for 50% power . The 2nd position provides 100% power . The engine brake switch can either 1st 2nd position during speed control operations, but the brake will function only fuel requested vehicle management and control - MAC) and engine speed (RPM) greater than 900 T o disengage the brake, move the switch the OFF position, press the accelerator pedal

Note: The engine brake will not engage until the engine oil temperature (EOT) has reached 52°C (125°F).

Accessor Y Rela Y Control

After idle vehicle management and control - MAC) will deactivate all the ignition power bus but the engine control module (ECM) power relay will remain active order reduce current draw from the battery after the engine has